Prepare the v0.14.0 release

.gitignore

@@ -56,6 +56,8 @@ mono_crash.*
 [Dd]ebugPublic/
 [Rr]elease/
 [Rr]eleases/
+!docs/releases/
+!docs/releases/*.md
 x64/
 x86/
 [Ww][Ii][Nn]32/
@@ -433,4 +435,3 @@ FodyWeavers.xsd
 
 # JetBrains Rider
 *.sln.iml
-

.woodpecker/release.yml

@@ -11,9 +11,16 @@ steps:
         version="$CI_COMMIT_TAG"
         dist="dist"
         pkg="gitea.maximumdirect.net/eric/scriptorium/cmd/scriptorium"
+        notes="docs/releases/$version.md"
+
+        if [ ! -f "$notes" ]; then
+          printf 'release notes not found: %s\n' "$notes" >&2
+          exit 1
+        fi
 
         rm -rf "$dist"
         mkdir -p "$dist"
+        cp "$notes" "$dist/RELEASE_NOTES.md"
 
         build_binary() {
           goos="$1"
@@ -22,7 +29,7 @@ steps:
           output="$dist/scriptorium-$version-$goos-$goarch$suffix"
 
           CGO_ENABLED=0 GOOS="$goos" GOARCH="$goarch" \
-            go build -trimpath -ldflags "-s -w -X gitea.maximumdirect.net/eric/scriptorium/internal/buildinfo.Version=$version" \
+            go build -trimpath -ldflags "-s -w" \
             -o "$output" "$pkg"
         }
 
@@ -38,6 +45,7 @@ steps:
         from_secret: GITEA_RELEASE_TOKEN
       files:
         - dist/scriptorium-*
+      note: dist/RELEASE_NOTES.md
       checksum: sha256
       checksum-file: SHA256SUMS
       checksum-flatten: true

AGENTS.md

@@ -1 +1,4 @@
 Please review `docs/development.md` for initial orientation in this repository and follow its task-specific reading guide.
+
+Review and follow `docs/policy/agents.md` before recommending, planning, or
+implementing changes to this repository.

README.md

@@ -1,12 +1,15 @@
-# scriptorium
+# Scriptorium
 
-Scriptorium is a narrow prompt-execution application for rendering prompt
+Scriptorium is a prompt-execution application with a command-line interface and
-requests, running them against OpenAI-compatible chat-completions endpoints, and
+an HTTP service. It prepares prompt requests, runs them against
-serving the same run workflow over HTTP.
+OpenAI-compatible model endpoints, and returns generated output with validation
+metadata.
 
-It keeps prompt definitions, execution profiles, schemas, and input artifacts as
+The application uses
-separate files so prompts can be reviewed and reused without baking model
+[Promptkit v0.11.0](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/)
-runtime settings into application code.
+for prompt, profile, schema, preparation, generation, and validation behavior.
+Scriptorium owns executable configuration, CLI and HTTP mapping, process
+behavior, output presentation, and HTTP artifact-containment policy.
 
 ## Quickstart
 
@@ -21,25 +24,34 @@ go run ./cmd/scriptorium render \
   --format json
 ```
 
-This command renders the prepared prompt and effective runtime settings without calling an LLM.
+This renders the prepared prompt and effective runtime settings without calling
-For complete invocation and output behavior, see the [CLI reference](docs/cli.md).
+a model. For complete invocation and output behavior, see the
+[CLI reference](docs/cli.md).
 
 ## Documentation
 
 - [CLI reference](docs/cli.md)
 - [Configuration reference](docs/config.md)
+- [Application configuration inspection](docs/cli.md#application-configuration-inspection)
 - [HTTP API reference](docs/api.md)
 - [Operations guide](docs/operations.md)
 - [Consumer integration overview](docs/consumers/api.md)
-- [Go library package](docs/consumers/pkg-scriptorium.md)
+- [Migration from the former Go package](docs/consumers/migrating-to-promptkit.md)
 - [Subprocess integration](docs/integrations/subprocess.md)
-- [OpenAI-compatible chat integration](docs/integrations/openai-compatible-chat.md)
 - [Architecture policy](docs/policy/architecture.md)
+- [Promptkit framework formats](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md)
+- [Promptkit Go consumer guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md)
 
 ## Examples
 
-- [Minimal configuration](examples/config.yml) and [complete configuration](examples/config.full.yml)
+- [Minimal configuration](examples/config.yml) and
-- [Prompt definitions](examples/prompts/), [execution profiles](examples/profiles/), [schemas](examples/schemas/), and [synthetic input fixtures](examples/fixtures/)
+  [complete configuration](examples/config.full.yml), plus a
+  [composed import/overlay example](examples/config.composed.yml)
+- [Prompt definitions](examples/prompts/), [execution profiles](examples/profiles/),
+  [schemas](examples/schemas/), and [synthetic input fixtures](examples/fixtures/)
 - [Render script](examples/render-markdown-summary.sh)
 - [HTTP request](examples/http-run.json)
-- [Go library example](examples/go-library/prepare/main.go)
+
+Scriptorium is licensed under the [BSD 3-Clause License](LICENSE).
+
+[Open Source attribution notices](docs/oss/attribution.md) are available.

artifact_reader.go

@@ -1,39 +0,0 @@
-package scriptorium
-
-import (
-	"context"
-	"errors"
-
-	artifactadapter "gitea.maximumdirect.net/eric/scriptorium/internal/artifact"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
-)
-
-var errNilArtifactReaderResponse = errors.New("artifact reader returned nil artifact without error")
-
-type publicArtifactReaderAdapter struct {
-	reader ArtifactReader
-}
-
-var _ artifactadapter.Reader = publicArtifactReaderAdapter{}
-
-func (a publicArtifactReaderAdapter) Read(ctx context.Context, ref domain.ArtifactRef) (*domain.Artifact, error) {
-	artifact, err := a.reader.Read(ctx, ArtifactRef{
-		Type: ArtifactRefType(ref.Type),
-		URI:  ref.URI,
-		Body: ref.Body,
-	})
-	if err != nil {
-		return nil, err
-	}
-	if artifact == nil {
-		return nil, errNilArtifactReaderResponse
-	}
-	return &domain.Artifact{
-		Name:        artifact.Name,
-		ContentType: artifact.ContentType,
-		Body:        copyBytes(artifact.Body),
-		URI:         artifact.URI,
-		Size:        artifact.Size,
-		Hash:        artifact.Hash,
-	}, nil
-}

artifact_reader_internal_test.go

@@ -1,36 +0,0 @@
-package scriptorium
-
-import (
-	"context"
-	"testing"
-
-	"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
-)
-
-func TestPublicArtifactReaderAdapterCopiesBody(t *testing.T) {
-	reader := internalArtifactReaderFake{
-		artifact: &Artifact{Body: []byte("original")},
-	}
-	adapter := publicArtifactReaderAdapter{reader: &reader}
-
-	artifact, err := adapter.Read(context.Background(), domain.ArtifactRef{
-		Type: domain.ArtifactRefInline,
-		URI:  "memory://input",
-		Body: "input",
-	})
-	if err != nil {
-		t.Fatalf("read artifact: %v", err)
-	}
-	artifact.Body[0] = 'X'
-	if got := string(reader.artifact.Body); got != "original" {
-		t.Fatalf("reader artifact body was mutated: %q", got)
-	}
-}
-
-type internalArtifactReaderFake struct {
-	artifact *Artifact
-}
-
-func (r *internalArtifactReaderFake) Read(context.Context, ArtifactRef) (*Artifact, error) {
-	return r.artifact, nil
-}

convert.go

@@ -1,406 +0,0 @@
-package scriptorium
-
-import (
-	"reflect"
-
-	"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
-)
-
-func toDomainRunRequest(req RunRequest) (domain.RunRequest, error) {
-	execution, err := toDomainExecutionTargetOverride(req.Execution)
-	if err != nil {
-		return domain.RunRequest{}, err
-	}
-	return domain.RunRequest{
-		PromptID:      req.PromptID,
-		PromptVersion: req.PromptVersion,
-		ProfileID:     req.ProfileID,
-		APIKey:        req.APIKey,
-		Inputs:        toDomainArtifactRefMap(req.Inputs),
-		Vars:          copyStringMap(req.Vars),
-		Execution:     execution,
-		Validation:    toDomainOutputContractPtr(req.Validation),
-		Metadata:      copyStringMap(req.Metadata),
-	}, nil
-}
-
-func fromDomainPreparedRun(prepared *domain.PreparedRun) *PreparedRun {
-	if prepared == nil {
-		return nil
-	}
-	return &PreparedRun{
-		PromptID:             prepared.PromptID,
-		PromptVersion:        prepared.PromptVersion,
-		PromptHash:           prepared.PromptHash,
-		SelectedProfileID:    prepared.SelectedProfileID,
-		EffectiveModelParams: fromDomainExecutionTarget(prepared.EffectiveModelParams),
-		OutputContract:       fromDomainOutputContract(prepared.OutputContract),
-		StructuredOutput:     fromDomainStructuredOutputSpec(prepared.StructuredOutput),
-		InputHashes:          copyStringMap(prepared.InputHashes),
-		SessionID:            prepared.SessionID,
-		RenderedPromptHash:   prepared.RenderedPromptHash,
-		Messages:             fromDomainRenderedMessages(prepared.Messages),
-		StartTime:            prepared.StartTime,
-		EndTime:              prepared.EndTime,
-		DurationMS:           prepared.DurationMS,
-	}
-}
-
-func fromDomainRunResult(result *domain.RunResult) *RunResult {
-	if result == nil {
-		return nil
-	}
-	return &RunResult{
-		RunID:                result.RunID,
-		Artifact:             fromDomainArtifact(result.Artifact),
-		RawOutput:            result.RawOutput,
-		Validation:           fromDomainValidationResult(result.Validation),
-		PromptID:             result.PromptID,
-		PromptVersion:        result.PromptVersion,
-		PromptHash:           result.PromptHash,
-		RenderedPromptHash:   result.RenderedPromptHash,
-		SelectedProfileID:    result.SelectedProfileID,
-		ModelName:            result.ModelName,
-		Endpoint:             result.Endpoint,
-		EffectiveModelParams: fromDomainExecutionTarget(result.EffectiveModelParams),
-		InputHashes:          copyStringMap(result.InputHashes),
-		Usage:                fromDomainTokenUsage(result.Usage),
-		StartTime:            result.StartTime,
-		EndTime:              result.EndTime,
-		Duration:             result.Duration,
-	}
-}
-
-func fromDomainGenerateRequest(req domain.GenerateRequest) GenerateRequest {
-	return GenerateRequest{
-		Prompt:           fromDomainRenderedPrompt(req.Prompt),
-		Target:           fromDomainExecutionTarget(req.Target),
-		TargetPresence:   fromDomainExecutionTargetPresence(req.TargetPresence),
-		StructuredOutput: fromDomainStructuredOutputSpec(req.StructuredOutput),
-		APIKey:           req.Target.APIKey,
-	}
-}
-
-func toDomainGenerateResponse(resp *GenerateResponse) *domain.GenerateResponse {
-	if resp == nil {
-		return nil
-	}
-	return &domain.GenerateResponse{
-		Content: resp.Content,
-		Usage:   toDomainTokenUsage(resp.Usage),
-	}
-}
-
-func fromDomainRenderedPrompt(prompt domain.RenderedPrompt) RenderedPrompt {
-	return RenderedPrompt{
-		SessionID: prompt.SessionID,
-		Messages:  fromDomainRenderedMessages(prompt.Messages),
-	}
-}
-
-func toDomainArtifactRefMap(src map[string]ArtifactRef) map[string]domain.ArtifactRef {
-	if src == nil {
-		return nil
-	}
-	out := make(map[string]domain.ArtifactRef, len(src))
-	for k, v := range src {
-		out[k] = toDomainArtifactRef(v)
-	}
-	return out
-}
-
-func toDomainArtifactRef(ref ArtifactRef) domain.ArtifactRef {
-	return domain.ArtifactRef{
-		Type: domain.ArtifactRefType(ref.Type),
-		URI:  ref.URI,
-		Body: ref.Body,
-	}
-}
-
-func fromDomainArtifact(artifact domain.Artifact) Artifact {
-	return Artifact{
-		Name:        artifact.Name,
-		ContentType: artifact.ContentType,
-		Body:        copyBytes(artifact.Body),
-		URI:         artifact.URI,
-		Size:        artifact.Size,
-		Hash:        artifact.Hash,
-	}
-}
-
-func toDomainExecutionTargetOverride(override *ExecutionTargetOverride) (*domain.ExecutionTargetOverride, error) {
-	if override == nil {
-		return nil, nil
-	}
-	extraParams, err := copyPublicJSONMap(override.ExtraParams)
-	if err != nil {
-		return nil, err
-	}
-	return &domain.ExecutionTargetOverride{
-		Endpoint:        override.Endpoint,
-		Model:           override.Model,
-		Temperature:     copyFloat64Ptr(override.Temperature),
-		MaxTokens:       copyIntPtr(override.MaxTokens),
-		TopP:            copyFloat64Ptr(override.TopP),
-		TimeoutSeconds:  copyIntPtr(override.TimeoutSeconds),
-		ServiceTier:     override.ServiceTier,
-		ReasoningEffort: override.ReasoningEffort,
-		APIKeyEnv:       override.APIKeyEnv,
-		ExtraParams:     extraParams,
-	}, nil
-}
-
-func fromDomainExecutionTarget(target domain.ExecutionTarget) ExecutionTarget {
-	return ExecutionTarget{
-		Endpoint:        target.Endpoint,
-		Model:           target.Model,
-		Temperature:     target.Temperature,
-		MaxTokens:       target.MaxTokens,
-		TopP:            target.TopP,
-		TimeoutSeconds:  target.TimeoutSeconds,
-		ServiceTier:     target.ServiceTier,
-		ReasoningEffort: target.ReasoningEffort,
-		APIKeyEnv:       target.APIKeyEnv,
-		ExtraParams:     copyAnyMap(target.ExtraParams),
-	}
-}
-
-func fromDomainExecutionTargetPresence(presence domain.ExecutionTargetPresence) ExecutionTargetPresence {
-	return ExecutionTargetPresence{
-		Temperature:    presence.Temperature,
-		MaxTokens:      presence.MaxTokens,
-		TopP:           presence.TopP,
-		TimeoutSeconds: presence.TimeoutSeconds,
-	}
-}
-
-func toDomainOutputContractPtr(contract *OutputContract) *domain.OutputContract {
-	if contract == nil {
-		return nil
-	}
-	out := toDomainOutputContract(*contract)
-	return &out
-}
-
-func toDomainOutputContract(contract OutputContract) domain.OutputContract {
-	return domain.OutputContract{
-		Format:         domain.OutputFormat(contract.Format),
-		ValidationMode: domain.ValidationMode(contract.ValidationMode),
-		SchemaPath:     contract.SchemaPath,
-		RepairAttempts: contract.RepairAttempts,
-	}
-}
-
-func fromDomainOutputContract(contract domain.OutputContract) OutputContract {
-	return OutputContract{
-		Format:         OutputFormat(contract.Format),
-		ValidationMode: ValidationMode(contract.ValidationMode),
-		SchemaPath:     contract.SchemaPath,
-		RepairAttempts: contract.RepairAttempts,
-	}
-}
-
-func fromDomainValidationResult(result domain.ValidationResult) ValidationResult {
-	return ValidationResult{
-		Status:         ValidationStatus(result.Status),
-		Mode:           ValidationMode(result.Mode),
-		Errors:         copyStringSlice(result.Errors),
-		SchemaPath:     result.SchemaPath,
-		RepairAttempts: result.RepairAttempts,
-		IsValid:        result.IsValid,
-	}
-}
-
-func fromDomainTokenUsage(usage domain.TokenUsage) TokenUsage {
-	return TokenUsage{
-		PromptTokens:     usage.PromptTokens,
-		CompletionTokens: usage.CompletionTokens,
-		TotalTokens:      usage.TotalTokens,
-		CachedTokens:     usage.CachedTokens,
-		CacheWriteTokens: usage.CacheWriteTokens,
-	}
-}
-
-func toDomainTokenUsage(usage TokenUsage) domain.TokenUsage {
-	return domain.TokenUsage{
-		PromptTokens:     usage.PromptTokens,
-		CompletionTokens: usage.CompletionTokens,
-		TotalTokens:      usage.TotalTokens,
-		CachedTokens:     usage.CachedTokens,
-		CacheWriteTokens: usage.CacheWriteTokens,
-	}
-}
-
-func fromDomainRenderedMessages(messages []domain.RenderedMessage) []RenderedMessage {
-	if messages == nil {
-		return nil
-	}
-	out := make([]RenderedMessage, len(messages))
-	for i, msg := range messages {
-		out[i] = RenderedMessage{
-			Role:         msg.Role,
-			Content:      msg.Content,
-			CacheControl: fromDomainCacheControl(msg.CacheControl),
-		}
-	}
-	return out
-}
-
-func fromDomainCacheControl(cacheControl *domain.CacheControl) *CacheControl {
-	if cacheControl == nil {
-		return nil
-	}
-	return &CacheControl{
-		Type: CacheControlType(cacheControl.Type),
-		TTL:  cacheControl.TTL,
-	}
-}
-
-func fromDomainStructuredOutputSpec(spec *domain.StructuredOutputSpec) *StructuredOutputSpec {
-	if spec == nil {
-		return nil
-	}
-	out := &StructuredOutputSpec{
-		Type: StructuredOutputType(spec.Type),
-	}
-	if spec.JSONSchema != nil {
-		out.JSONSchema = &StructuredOutputJSONSpec{
-			Name:   spec.JSONSchema.Name,
-			Strict: spec.JSONSchema.Strict,
-			Schema: copyAny(spec.JSONSchema.Schema),
-		}
-	}
-	return out
-}
-
-func copyStringMap(src map[string]string) map[string]string {
-	if src == nil {
-		return nil
-	}
-	out := make(map[string]string, len(src))
-	for k, v := range src {
-		out[k] = v
-	}
-	return out
-}
-
-func copyAnyMap(src map[string]any) map[string]any {
-	if src == nil {
-		return nil
-	}
-	out := make(map[string]any, len(src))
-	for k, v := range src {
-		out[k] = copyAny(v)
-	}
-	return out
-}
-
-func copyAny(value any) any {
-	if value == nil {
-		return nil
-	}
-	switch v := value.(type) {
-	case map[string]any:
-		return copyAnyMap(v)
-	case []any:
-		out := make([]any, len(v))
-		for i, item := range v {
-			out[i] = copyAny(item)
-		}
-		return out
-	case []string:
-		return copyStringSlice(v)
-	case []byte:
-		return copyBytes(v)
-	default:
-		return copyReflectValue(reflect.ValueOf(value)).Interface()
-	}
-}
-
-func copyReflectValue(value reflect.Value) reflect.Value {
-	if !value.IsValid() {
-		return value
-	}
-
-	switch value.Kind() {
-	case reflect.Interface:
-		if value.IsNil() {
-			return reflect.Zero(value.Type())
-		}
-		copied := copyReflectValue(value.Elem())
-		if copied.IsValid() && copied.Type().AssignableTo(value.Type()) {
-			return copied
-		}
-		out := reflect.New(value.Type()).Elem()
-		out.Set(copied)
-		return out
-	case reflect.Pointer:
-		if value.IsNil() {
-			return reflect.Zero(value.Type())
-		}
-		out := reflect.New(value.Type().Elem())
-		out.Elem().Set(copyReflectValue(value.Elem()))
-		return out
-	case reflect.Map:
-		if value.IsNil() {
-			return reflect.Zero(value.Type())
-		}
-		out := reflect.MakeMapWithSize(value.Type(), value.Len())
-		iter := value.MapRange()
-		for iter.Next() {
-			out.SetMapIndex(copyReflectValue(iter.Key()), copyReflectValue(iter.Value()))
-		}
-		return out
-	case reflect.Slice:
-		if value.IsNil() {
-			return reflect.Zero(value.Type())
-		}
-		out := reflect.MakeSlice(value.Type(), value.Len(), value.Cap())
-		for i := 0; i < value.Len(); i++ {
-			out.Index(i).Set(copyReflectValue(value.Index(i)))
-		}
-		return out
-	case reflect.Array:
-		out := reflect.New(value.Type()).Elem()
-		for i := 0; i < value.Len(); i++ {
-			out.Index(i).Set(copyReflectValue(value.Index(i)))
-		}
-		return out
-	default:
-		return value
-	}
-}
-
-func copyStringSlice(src []string) []string {
-	if src == nil {
-		return nil
-	}
-	out := make([]string, len(src))
-	copy(out, src)
-	return out
-}
-
-func copyBytes(src []byte) []byte {
-	if src == nil {
-		return nil
-	}
-	out := make([]byte, len(src))
-	copy(out, src)
-	return out
-}
-
-func copyFloat64Ptr(src *float64) *float64 {
-	if src == nil {
-		return nil
-	}
-	v := *src
-	return &v
-}
-
-func copyIntPtr(src *int) *int {
-	if src == nil {
-		return nil
-	}
-	v := *src
-	return &v
-}

docs/adr/0004-definition-boundary.md

@@ -0,0 +1,112 @@
+# Preserve Definition Compatibility And A Simple Execution Model
+
+## Status
+
+Accepted.
+
+## Date
+
+2026-08-29.
+
+## Context
+
+Scriptorium is a user-facing application built on Promptkit. Promptkit is a Go
+library with both declarative framework formats and public APIs intended for
+applications that need to assemble specialized integrations or workflows.
+
+Scriptorium needs a durable rule for deciding which upstream capabilities it
+must support. Treating every new Promptkit public API as an application feature
+would steadily expand Scriptorium into a workflow framework. Selecting an
+arbitrary subset of prompt or profile fields would instead make valid Promptkit
+definitions unexpectedly unusable through Scriptorium.
+
+The intended product is narrower: Scriptorium provides simple executable
+interfaces that select and execute predefined prompts and return their results
+in a consistent, repeatable form. It is not intended to own conversations,
+modify prompts dynamically, coordinate follow-up messages, or manage complex
+multi-step workflows.
+
+## Decision
+
+Scriptorium will aim to support the complete set of features expressible in
+valid Promptkit prompt and profile definitions for the Promptkit version it
+selects. This includes the schema, backend, source, and request plumbing needed
+to prepare and execute those definitions without Scriptorium imposing a
+narrower field-level format contract.
+
+Promptkit remains the canonical parser and validator for its definitions.
+Scriptorium will pass its configured framework sources and mapped request
+values through the supported Promptkit public facade rather than copying
+Promptkit formats, defaults, or validation rules.
+
+Promptkit library features that are not required to use valid prompt or profile
+definitions are considered individually. They may be incorporated when they
+serve Scriptorium's simple execution model and fit its application-owned CLI,
+HTTP, configuration, presentation, security, and process boundaries. A public
+Promptkit declaration does not by itself require a corresponding Scriptorium
+interface.
+
+Each execution request will remain self-contained from the caller's
+perspective. A request must not depend on conversation or workflow state
+retained from a completed request, and Scriptorium will not become a general
+workflow or conversation system. Application-managed prompt modification,
+appended or follow-up message flows, conversation state, prepared-handle
+coordination, multi-step orchestration, and similar higher-level workflows are
+outside its intended scope.
+
+Scriptorium may, and when necessary must, maintain process-scoped operational
+state shared by concurrent requests. This includes the configured Promptkit
+engine and backend registry, capacity admission and queue accounting,
+in-flight request coordination, cancellation, and ordinary server lifecycle
+resources. The state must be scoped so configured backend limits apply across
+all relevant in-flight requests. But this is operational implementation state,
+not durable user workflow or conversation state.
+
+## Alternatives Considered
+
+### Expose Every Promptkit Public Feature
+
+This would make the application surface track the library API closely, but it
+would blur the boundary between a reusable Go library and a simple executable
+consumer. Library-oriented lifecycle, source-construction, extension, and
+workflow primitives would add commands, wire contracts, configuration, and
+state without necessarily improving predefined prompt execution.
+
+### Support A Curated Subset Of Definition Fields
+
+This would keep the application small in the short term, but valid Promptkit
+definitions could fail or behave differently solely because they were invoked
+through Scriptorium. Maintaining a parallel field-level compatibility list
+would also duplicate upstream format ownership and create recurring drift.
+
+### Expand Scriptorium Into A Workflow Service
+
+Scriptorium could own conversations, prompt changes, follow-up messages,
+retries, checkpoints, and multi-step execution. That is a different product
+with durable state, lifecycle, recovery, privacy, and operational requirements
+that are not justified by Scriptorium's current purpose.
+
+## Consequences
+
+- Promptkit upgrades require an audit of the complete prompt and profile format
+  contracts, not only a source-compatibility build.
+- Scriptorium adapters must not add unconditional request requirements that
+  reject a definition Promptkit can validly prepare or execute.
+- Application configuration may need new plumbing, such as custom backend
+  registration, when it is necessary to use a valid profile feature.
+- Definition parsing, validation, precedence, inheritance, defaults, and
+  built-in catalogs remain Promptkit responsibilities.
+- A running HTTP server must share its appropriately scoped Promptkit engine
+  across requests so the engine's backend admission and concurrency limits
+  cannot be bypassed by per-request construction.
+- Process-scoped counters, queues, in-flight request records, cancellation, and
+  lifecycle resources are permitted implementation state. They must be
+  concurrency-safe and do not create a durable resume or conversation
+  contract.
+- Library-only source constructors, injected collaborators, opaque lifecycle
+  handles, and request-composition primitives remain optional Scriptorium
+  features rather than automatic requirements.
+- New application features must be evaluated against the simple,
+  request-independent predefined-prompt execution model.
+- Work that implements this decision remains tracked in roadmaps until it is
+  delivered and incorporated into current-state contracts.

docs/api.md

@@ -20,7 +20,7 @@ of their `Content-Type`; successful JSON responses use
 
 The configured request-body limit includes inline artifact bodies. The artifact
 limit applies to HTTP `file` inputs. The response limit applies to the encoded
-response, including the artifact body and optional raw output. A limit of zero
+response, including the artifact body, optional raw output, and optional execution report. A limit of zero
 disables that limit.
 
 A request body over its limit returns `413 request_too_large`; an oversized
@@ -32,14 +32,11 @@ returns `413 response_too_large`.
 ### Request Body
 
 The maintained [request example](../examples/http-run.json) is a complete
-copyable shape. The smallest valid shape is:
+copyable shape. At the HTTP adapter boundary, the smallest valid shape is:
 
 ```json
 {
-  "prompt_id": "generic.markdown_summary",
+  "prompt_id": "generic.markdown_summary"
-  "inputs": {
-    "transcript": {"type": "inline", "body": "Source text"}
-  }
 }
 ```
 
@@ -48,10 +45,14 @@ copyable shape. The smallest valid shape is:
 | `prompt_id` | yes | Non-blank prompt ID. |
 | `prompt_version` | no | Prompt version filter. |
 | `profile_id` | no | Execution-profile ID; otherwise the prompt must set `default_profile`. |
-| `inputs` | yes | Non-empty object mapping input names to references. |
+| `session_id` | no | Optional direct, non-secret session identifier. |
+| `inputs` | no | Optional object mapping input names to references. Promptkit decides whether the selected definition needs them. |
 | `vars` | no | Object mapping template-variable names to strings. |
 | `model` | no | Runtime model-override object. |
 | `include_raw_output` | no | Include `raw_model_output` when true. |
+| `include_execution_report` | no | Include a terminal `execution` report when true and Promptkit supplies a terminal observation. Omitted, `null`, or false leaves reporting off. |
+| `transient_retries` | no | Nonnegative additional transient attempt count for this run. Omitted or `null` inherits the configured engine value and then Promptkit's default; `0` disables additional attempts. |
+| `run_timeout_seconds` | no | Optional signed 64-bit whole-second limit for engine execution. Omitted, `null`, or `0` adds no deadline; positive values shorten the caller context deadline. |
 
 An input reference has a required `type` of `file` or `inline`. A `file`
 reference requires `uri`; an `inline` reference requires `body`.
@@ -66,20 +67,45 @@ untrusted writers.
 The optional `model` object accepts `endpoint`, `model`, `temperature`,
 `max_tokens`, `top_p`, `timeout_seconds`, `service_tier`,
 `reasoning_effort`, `api_key_env`, and `extra_params`. Numeric ranges and
-credential supply are defined by the [configuration reference](config.md).
+framework credential semantics are defined by the
+[Promptkit format reference](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md).
 Explicit zero values for the numeric fields are overrides; zero
-`timeout_seconds` disables the per-generation deadline only, retaining the
+`timeout_seconds` disables the per-attempt generation deadline only, retaining the
 request context and configured transport cap. The timeout layers are defined in
-the [outbound integration contract](integrations/openai-compatible-chat.md#authentication-and-timeout).
+the [Promptkit outbound integration contract](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/integrations/openai-compatible-chat.md#timeout-and-cancellation).
+Each built-in transient retry gets a fresh generation timeout; the caller's
+request context remains the outer cancellation boundary.
 
 Raw API-key values are not accepted. `api_key` and any other unknown model
 field cause `400 invalid_json`.
 
+`model.reasoning_effort` is an optional JSON string with three states: omission
+inherits the selected profile, a non-empty string replaces its value, and an
+empty string explicitly clears it. JSON `null` is treated as omission.
+
+`session_id` is passed directly to Promptkit. A nonblank value replaces a
+definition-rendered session ID; omission or a blank value lets the definition
+provide one. Promptkit trims direct values and limits them to 256 Unicode code
+points. Session IDs are not credentials and may be included in prepared data,
+results, and provider-facing requests, so use stable non-sensitive identifiers.
+
 ### Strict JSON
 
 Request decoding rejects malformed JSON, unknown fields at every request level,
-and trailing JSON tokens with `400 invalid_json`. A blank `prompt_id` or
+and trailing JSON tokens with `400 invalid_json`. A blank `prompt_id` returns
-empty `inputs` object returns `400 invalid_request`.
+`400 invalid_request`. Omitted or empty `inputs` are passed to Promptkit, which
+reports any definition-required or template-referenced inputs.
+`transient_retries` must be a JSON integer; a wrong type or noninteger number
+returns `400 invalid_json`, while a negative integer returns
+`400 invalid_request` before execution. A request override does not change the
+shared engine setting used by other requests. Promptkit owns eligible statuses,
+retry waits, and the separate transient budget for each repair generation.
+`run_timeout_seconds` must be a JSON int64. A wrong type or int64 overflow
+returns `400 invalid_json`; a negative value or one whose conversion to a Go
+duration would overflow returns `400 invalid_request`. The deadline starts
+immediately before engine execution and excludes body decoding and response
+writing. An earlier caller deadline or cancellation still wins. Synchronous
+work is not guaranteed to stop immediately.
 
 ### Success Response
 
@@ -90,21 +116,63 @@ validation contract. The response contains:
   optional `uri`;
 - `validation`: `status`, `mode`, `repair_attempts`, `is_valid`, plus
   optional `errors` and `schema_path`;
-- `metadata`: run, prompt, rendered-prompt, profile, model, input-hash, usage,
+- `metadata`: run, prompt, rendered-prompt, profile, optional backend identity, model, input-hash, usage,
   timing, validation, and repair-attempt metadata; and
 - optional `raw_model_output` when requested.
+- optional `execution` when requested and a terminal observation exists.
 
 `metadata.model_params` has `endpoint`, `model`, `temperature`,
 `max_tokens`, `top_p`, and `timeout_seconds`, plus optional
-`service_tier`, `reasoning_effort`, `api_key_env`, and `extra_params`.
+`backend_id`, `service_tier`, `reasoning_effort`, `api_key_env`, and `extra_params`.
 `metadata.usage` always includes `prompt_tokens`, `completion_tokens`,
 `total_tokens`, `cached_tokens`, and `cache_write_tokens`; unavailable
 cache usage is reported as zero.
 
+When Promptkit resolves a direct or definition-rendered session ID,
+`metadata.session_id` contains that effective result value. It is omitted when
+no effective session ID exists.
+
+`metadata.selected_backend_id` and `metadata.model_params.backend_id` report
+the corresponding Promptkit result fields independently when present. Both are
+omitted for an endpoint-only profile; Scriptorium does not infer backend
+identity from an endpoint.
+
 A validation failure has `validation.status: "failed"`, `is_valid: false`,
 and any available diagnostic errors, while still returning the artifact and
 metadata.
 
+### Execution Report
+
+The opt-in `execution` object projects one Promptkit terminal observation. It
+is independent of `metadata.usage`, which retains its existing result-based
+meaning. A terminal event can describe a failed invocation even when no provider
+call was dispatched; if there is no terminal event, `execution` is omitted.
+
+| Field | Meaning |
+| --- | --- |
+| `run_id`, `prompt_id`, `prompt_version`, `profile_id`, `backend_id`, `model` | Terminal identifiers; absent values are omitted. |
+| `outcome` | `success`, `invalid_output`, `error`, or `other` for an unrecognized upstream value. |
+| `failure` | The known terminal failure category, `none`, or `other` for an unrecognized value. |
+| `status_code` | Provider status, omitted when unavailable. |
+| `retries_exhausted` | Boolean independent of the failure category. |
+| `attempts`, `transient_retries`, `repair_calls` | Unsigned terminal aggregate counts. |
+| `duration_ms`, `capacity_wait_ms`, `generation_duration_ms`, `retry_delay_ms` | Terminal observed durations in integer milliseconds; their sum need not equal wall time. |
+| `usage` | Object containing `prompt_tokens`, `completion_tokens`, `total_tokens`, `cached_tokens`, and `cache_write_tokens`. |
+
+Each `usage` count contains `value` (integer), `known` (boolean), and
+`complete` (boolean). Reported zero differs from an unknown count; an
+incomplete total does not establish complete billing. All counts, durations,
+`retries_exhausted`, and `usage` are present even when zero or unknown. The
+recognized failure values are `none`, `canceled`, `deadline`, `transport`,
+`provider_status`, `malformed_response`, `capacity`, `invalid_config`,
+`invalid_request`, `prompt_not_found`, `profile_not_found`, `prompt_load`,
+`profile_load`, `artifact_load`, `prompt_render`, `validation`, `generation`,
+and `other`.
+
+The report excludes content, credentials, URLs, headers, and raw errors, but
+its identifiers can still be sensitive. Apply appropriate access and retention
+controls to responses that include it.
+
 ## Error Responses
 
 Errors have this shape:
@@ -114,6 +182,12 @@ Errors have this shape:
 ```
 
 Messages are concise and do not expose wrapped internal causes.
+For an opted-in failed invocation, the error envelope can also include the
+optional top-level `execution` object described above. Decode and validation
+failures before engine invocation do not have a report. Report-bearing error
+responses are subject to the complete encoded response-size limit; if they
+exceed it, the response is the compact `413 response_too_large` error without
+`execution`. The existing compact error fallback itself is not re-limited.
 
 | Status | Code | Meaning |
 | --- | --- | --- |
@@ -130,12 +204,20 @@ Messages are concise and do not expose wrapped internal causes.
 | `404` | `prompt_not_found` | Prompt ID or version does not exist. |
 | `404` | `profile_not_found` | Profile ID does not exist. |
 | `405` | `method_not_allowed` | The route does not accept the method. |
+| `408` | `request_canceled` | The caller context was canceled during a failed run. |
 | `413` | `request_too_large` | Encoded request exceeds its limit. |
 | `413` | `artifact_too_large` | File input exceeds its limit. |
 | `413` | `response_too_large` | Encoded response exceeds its limit. |
 | `500` | `validation_runtime_failed` | Schema or validator runtime failure. |
 | `500` | `internal_error` | Unclassified server failure. |
 | `502` | `llm_failed` | Outbound model request failed. |
+| `503` | `capacity_exceeded` | The selected model backend has no admission capacity. No retry timing is supplied. |
+| `504` | `deadline_exceeded` | The execution context's deadline expired during a failed run. |
+
+These context outcomes require the execution context to have ended. A provider
+attempt timeout while it remains live retains `502 llm_failed`. A successful
+run remains successful even if cancellation races with response formatting;
+delivery after a client disconnect cannot be guaranteed.
 
 ## Retry And Idempotency
 

docs/cli.md

@@ -1,7 +1,7 @@
 # CLI Reference
 
 This is the canonical contract for invoking Scriptorium. Configuration discovery,
-precedence, directories, profiles, and schemas are defined in the
+precedence, application source locations, and server settings are defined in the
 [configuration reference](config.md). The [HTTP API reference](api.md) owns
 service request and response behavior.
 
@@ -23,10 +23,24 @@ go run ./cmd/scriptorium render \
   generated artifact.
 - `scriptorium render`: prepare a prompt and write prepared-run output.
 - `scriptorium serve`: start the HTTP server.
+- `scriptorium inspect prompt`: inspect one prompt definition without model execution.
+- `scriptorium inspect profile`: inspect one effective profile without model execution.
+- `scriptorium config validate`: validate application configuration without building an engine.
+- `scriptorium config show`: show the resolved application configuration.
+- `scriptorium config sources`: show the ordered configuration sources.
+- `scriptorium config explain`: explain one effective or historical configuration path.
 
-All commands accept `--config <path>` and reject positional arguments. An
+All commands accept `--config <path>` and `--config-overlay <name>` and reject
-effective `prompt_dir` is required for every command. Supply it through the
+positional arguments. `--config-overlay` selects one application configuration
-configuration contract or the command's `--prompt-dir` flag.
+overlay; it is separate from `--profile`, which selects a Promptkit execution
+profile. See [configuration composition](config.md#explicit-imports-and-selected-overlays)
+for name, root, and no-base behavior. `run`,
+`render`, `serve`, and `inspect prompt` require an effective `prompt_dir`;
+`inspect profile` does not. Supply the directory through the configuration
+contract or a supported `--prompt-dir` flag. Explicit application flags,
+including empty values, override file settings. Configuration load diagnostics
+go to stderr and exit with status 1; successful load warnings are printed once
+before command work.
 
 ## `scriptorium run`
 
@@ -39,57 +53,123 @@ Required flags:
 | Flag | Meaning |
 | --- | --- |
 | `--prompt <id>` | Prompt ID to execute. |
-| `--input name=path` | Input file mapping; repeat or use comma-separated mappings. |
 
 Optional flags:
 
 | Flag | Meaning |
 | --- | --- |
 | `--config <path>` | Application configuration file. |
+| `--config-overlay <name>` | Selected application configuration overlay. |
 | `--prompt-dir <dir>` | Prompt-definition directory override. |
 | `--profile-dir <dir>` | Custom profile-directory override. |
 | `--schema-dir <dir>` | Schema base-directory override. |
+| `--prompt-version <version>` | Optional prompt-definition version selector. |
 | `--profile <id>` | Execution-profile override. |
+| `--session-id <id>` | Optional direct session identifier. |
+| `--input name=path` | Optional input file mapping; repeat or use comma-separated mappings. |
 | `--var name=value` | Template-variable mapping; repeat or use comma-separated mappings. |
 | `--out <path>` | Write generated content to this file instead of stdout. |
+| `--execution-report <path>` | Write an opt-in terminal execution report as newline-terminated JSON to a separate file. |
 | `--llm-base-url <url>` | Runtime endpoint override. |
 | `--model <name>` | Runtime model override. |
 | `--api-key-env <name>` | Runtime API-key environment-variable name override. |
 | `--temperature <float>` | Runtime temperature override. |
 | `--max-tokens <int>` | Runtime maximum-token override. |
 | `--top-p <float>` | Runtime top-p override. |
+| `--reasoning-effort <value>` | Runtime reasoning-effort override. |
 | `--timeout <duration>` | Runtime timeout override using Go duration syntax. |
+| `--run-timeout <duration>` | Optional whole-run engine deadline using Go duration syntax; zero or omission adds no deadline, negative values are invalid. |
+| `--transient-retries <integer>` | Nonnegative additional transient attempt count for this request; `0` disables additional attempts. |
 
 Deprecated aliases: `--prompt-id` for `--prompt`, and `--profile-id` for
 `--profile`.
 
 Omitted numeric runtime flags preserve the selected effective value; explicit
-zero values override it. `--timeout 0s` disables the per-generation deadline
+zero values override it. `--timeout 0s` disables the per-attempt generation deadline
 only; the caller context and configured transport cap remain active. CLI
 durations are converted to whole seconds by truncation toward zero, so any
 duration whose absolute value is below one second becomes an explicit
 zero-second override. The timeout layers are defined in the
-[outbound integration contract](integrations/openai-compatible-chat.md#authentication-and-timeout).
+[Promptkit outbound integration contract](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/integrations/openai-compatible-chat.md#timeout-and-cancellation).
+With the built-in client, each transient retry gets a fresh generation timeout;
+this flag does not limit the complete run.
+`--run-timeout` keeps subsecond precision and starts immediately before engine
+execution. It bounds preparation, capacity waits, retry waits, generation, and
+repairs where they honor context. Parsing, engine construction, and output
+writes are outside that interval. A failed run whose execution context reaches
+this deadline exits 1 with a safe deadline diagnostic; a completed invalid
+output still exits 2. It does not promise immediate interruption of synchronous
+work.
+Omitting `--transient-retries` inherits the application setting or Promptkit's
+current default of two additional attempts. The flag overrides only this
+request; it does not alter the configured engine. Structural repair generations
+have separate transient retry budgets.
 
 There is no raw API-key flag. Use `--api-key-env`.
 
+`--prompt-version` is passed directly to Promptkit. When it is omitted, the
+selected prompt ID must have exactly one available version. `--input` is
+optional at the CLI boundary: Promptkit decides whether the selected definition
+requires declared inputs or template-referenced values.
+
+`--session-id` supplies a direct, non-secret session identifier. A nonblank
+value replaces a definition-rendered session ID; an omitted or blank value lets
+the definition supply one. Promptkit trims direct values and limits them to 256
+Unicode code points. Use stable, non-sensitive identifiers because effective
+session IDs may appear in prepared output, run metadata, and provider-facing
+requests.
+
+`--reasoning-effort` is presence-aware: omitting it inherits the selected
+profile value, a nonblank value replaces that value, and
+`--reasoning-effort=` explicitly clears inherited reasoning. Promptkit treats
+nonblank values as provider-specific opaque strings.
+
+### Execution report file
+
+`--execution-report` requires a nonempty path. It is available only for `run`;
+`-` is an ordinary filename. Parent directories are not created. An existing
+file is replaced through ordinary file writing, without rollback or an atomic
+replacement guarantee. Generated content still goes to stdout or `--out`.
+Equal output/report paths, including existing paths that refer to the same
+file, are rejected before execution.
+
+The file is written after engine execution when Promptkit supplies a terminal
+event, including for a failed run or invalid generated output. A failure before
+invocation leaves the report path untouched. If no terminal event is supplied,
+Scriptorium leaves the path untouched and emits a diagnostic; an existing file
+may therefore contain an older report. Artifact output is attempted first on a
+successful run, and report writing is attempted even if artifact writing fails.
+Any output or report write failure exits 1; already-written output is not
+undone. Without a write failure, the actual run keeps its usual exit status.
+
+The [HTTP API reference](api.md#execution-report) defines the shared report
+fields and usage-presence semantics. The file contains that JSON object followed
+by a newline.
+
+The report excludes content, credentials, URLs, headers, and raw errors, but
+its identifiers can still be sensitive. The caller owns file retention and
+access.
+
 ## `scriptorium render`
 
 ```text
 scriptorium render [flags]
 ```
 
-`--prompt <id>` and at least one `--input name=path` are required. The
+`--prompt <id>` is required. The following optional flags are supported:
-following optional flags are supported: `--config`, `--prompt-dir`,
+`--config`, `--config-overlay`, `--prompt-dir`, `--profile-dir`, `--schema-dir`, `--prompt-version`, `--profile`,
-`--profile-dir`, `--profile`, `--var`, `--out`, `--llm-base-url`,
+`--input`, `--var`, `--out`, `--llm-base-url`,
 `--model`, `--api-key-env`, `--temperature`, `--max-tokens`, `--top-p`,
-`--timeout`, and `--format text|json`. Their meanings match the corresponding
+`--reasoning-effort`, `--session-id`, `--timeout`, `--transient-retries`, and `--format text|json`. Their meanings match the corresponding
 `run` flags; `--format` selects prepared-run output and otherwise uses
 `defaults.render_format`.
 
 The same deprecated aliases and numeric/timeout behavior as `run` apply.
-`render` does not accept `--schema-dir`; configure `schema_dir` through the
+The same session and reasoning inheritance, replacement, and clearing behavior
-configuration file. It resolves profiles and schemas as part of preparation but
+also applies.
+`render` validates the retry override but does not generate model output or
+include a retry field in prepared output.
+`render` resolves profiles and schemas as part of preparation but
 does not call an LLM.
 
 ## `scriptorium serve`
@@ -103,6 +183,7 @@ Optional flags:
 | Flag | Meaning |
 | --- | --- |
 | `--config <path>` | Application configuration file. |
+| `--config-overlay <name>` | Selected application configuration overlay. |
 | `--addr <listen-address>` | HTTP listen-address override. |
 | `--prompt-dir <dir>` | Prompt-definition directory override. |
 | `--profile-dir <dir>` | Custom profile-directory override. |
@@ -115,6 +196,74 @@ Optional flags:
 `serve` accepts no runtime model override flags. HTTP request fields, response
 schemas, and error codes are defined in the [HTTP API reference](api.md).
 
+## `scriptorium inspect prompt`
+
+```text
+scriptorium inspect prompt --prompt ID [--prompt-version VERSION]
+    [--config PATH] [--config-overlay NAME] [--prompt-dir DIR] [--format text|json] [--out PATH]
+```
+
+`--prompt` is required. Inspection uses normal configuration discovery and a
+`--prompt-dir` override, defaults to text regardless of `defaults.render_format`,
+and writes to stdout unless `--out` is supplied. It loads and normalizes the
+selected definition but does not resolve a profile, load a schema, render a
+template, reserve backend capacity, or call a model.
+
+## `scriptorium inspect profile`
+
+```text
+scriptorium inspect profile --profile ID
+    [--config PATH] [--config-overlay NAME] [--profile-dir DIR] [--format text|json] [--out PATH]
+```
+
+`--profile` is required; built-in profiles need no prompt directory. Inspection
+resolves profile inheritance and backend defaults, but never reads a credential
+value, loads a prompt, reserves capacity, or calls a model. Unset provider
+controls are shown as zero values when Promptkit leaves them unspecified.
+
+## Application configuration inspection
+
+```text
+scriptorium config validate [flags]
+scriptorium config show [flags]
+scriptorium config sources [flags]
+scriptorium config explain --path JSON_POINTER [flags]
+```
+
+Each accepts `--config`, `--config-overlay`, `--prompt-dir`, `--profile-dir`,
+`--schema-dir`, `--addr`, `--artifact-root`, `--max-request-bytes`,
+`--max-artifact-bytes`, and `--max-response-bytes`. These are application
+configuration selectors and overrides; request, credential, backend-editing,
+output-format, and output-file flags are not accepted. Positional arguments
+are rejected.
+
+`validate` writes no success output; status 0 means the application configuration
+loaded and passed its own validation. It does not establish that a prompt
+directory exists, credentials are present, or Promptkit can construct an
+engine. `show` writes ConfigKit's resolved, redacted YAML snapshot. `sources`
+writes one newline-terminated JSON array of source records in load order. Each
+record has `id`, `label`, and `layer`, plus `path` when available; explicit CLI
+overrides appear as synthetic sources. Defaults-only input without overrides
+produces `[]` for `sources`.
+
+`explain` requires an explicitly supplied `--path` in JSON Pointer syntax.
+The empty string selects the root; `/server/addr` selects a field; `~1` and
+`~0` escape `/` and `~` inside mapping keys. Numeric tokens are interpreted
+according to the containing mapping or sequence. Dotted paths, file paths,
+and URL fragments are not accepted. ConfigKit writes a human-readable account
+of the effective value and its chronological default, base, overlay, CLI,
+and normalization history, including removed historical values. This is not a
+JSON schema or a byte-for-byte stable prose format. Unknown and malformed paths
+exit 1 without successful explanation output.
+
+Diagnostics and warnings go to stderr, never into successful stdout. Parse,
+load, output, and diagnostic-write failures exit 1. Ordinary output writes may
+leave partial data on failure. The inspection output can contain paths,
+identifiers, `api_key_env` reference names, and ordinary `extra_params` values,
+including displaced historical values in explanations;
+protect it accordingly. Raw API-key values are not read or emitted by these
+commands.
+
 ## Input And Variable Syntax
 
 `--input name=path` maps an input name to a local file; `--var name=value`
@@ -128,9 +277,12 @@ CLI inputs are file references. HTTP inline inputs are defined by the
 ## Output And Exit Behavior
 
 - `run` writes generated content to stdout, or to `--out` when supplied, and
-  writes a concise summary to stderr.
+  writes a concise summary to stderr. The summary includes `backend=<id>` when
+  Promptkit selected a backend; endpoint-only profiles omit it.
 - `render` writes prepared-run output to stdout, or to `--out` when supplied,
-  without a success summary.
+  without a success summary. Text output includes `selected_backend_id` after
+  `selected_profile_id` when Promptkit selected one; endpoint-only profiles
+  omit it.
 - `serve` writes startup and server errors to stderr.
 
 Exit statuses:
@@ -141,6 +293,10 @@ Exit statuses:
 | `1` | Parse, configuration, loading, rendering, generation, output-write, or other runtime error. |
 | `2` | `run` generated and wrote output, but validation failed. |
 
+A backend admission rejection is a runtime error and prints `run error: model
+backend capacity is exhausted`. The HTTP capacity response is defined in the
+[HTTP API reference](api.md).
+
 ## Workflows And Examples
 
 The [maintained render script](../examples/render-markdown-summary.sh) is a

docs/config.md

@@ -1,15 +1,17 @@
 # Configuration Reference
 
-This is the canonical reference for Scriptorium application settings and the
+This is the canonical reference for Scriptorium application settings. Prompt,
-prompt, profile, and schema files those settings select. For command syntax,
+profile, schema, execution-setting, built-in profile, and framework credential
-see the [CLI reference](cli.md); for HTTP request shapes, limits, and outcomes,
+semantics are defined by the
-see the [HTTP API reference](api.md).
+[Promptkit v0.11.0 format reference](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md).
+For command syntax, see the [CLI reference](cli.md); for HTTP request shapes and
+outcomes, see the [HTTP API reference](api.md).
 
 ## Discovery And Precedence
 
 Application settings are resolved in this order:
 
-1. built-in defaults;
+1. built-in Scriptorium defaults;
 2. a configuration file; then
 3. CLI overrides.
 
@@ -18,156 +20,188 @@ When `--config` is omitted, Scriptorium searches
 If neither exists, it uses built-in defaults. An explicit `--config` path must
 exist and decode successfully.
 
-The maintained [minimal configuration](../examples/config.yml) and
+The maintained [minimal configuration](../examples/config.yml),
-[full configuration](../examples/config.full.yml) are copyable examples.
+[complete configuration](../examples/config.full.yml), and
+[composed configuration](../examples/config.composed.yml) are copyable examples.
 
 ## Application Configuration File
 
-Configuration is strict YAML: unknown fields are rejected. Empty string values
+Configuration is decoded by ConfigKit v0.4.0 as strict YAML. Unknown fields,
-do not override a prior value. Raw API-key fields are not accepted.
+empty files, multiple YAML documents, and YAML aliases/anchors are rejected.
+An explicit empty string is a value: it clears a file-provided optional path
+or, for required `prompt_dir`, fails the command's prerequisite. A scalar
+`null` is not an empty string and is rejected for scalar fields; nullable
+fields such as `transient_retries` retain their documented meaning. Raw
+API-key fields are not accepted.
+
+ConfigKit applies defaults, the selected file, then only explicitly supplied
+application CLI flags before validating the result. Paths in the application
+document remain relative to the process working directory, not to the file's
+directory. Load diagnostics are printed safely on stderr; invalid application
+configuration exits with status 1.
+
+### Explicit imports and selected overlays
+
+A file-backed configuration may declare `configkit.imports` with relative
+`path` or `glob` entries. Each entry is explicit; Scriptorium does not scan
+for fragments on its own. ConfigKit composes the selected file and imports by
+conflict, so two fragments cannot define the same field merely to establish
+precedence. A required missing import fails; an entry may use
+`optional: true` to suppress target nonexistence. Imports are resolved from
+the declaring file's canonical directory and remain within the selected
+file's canonical directory by default. Scriptorium does not widen that root.
+
+`--config-overlay NAME` selects one file at `overlays/NAME.yml` below that
+root. The name must use letters, digits, `_`, or `-`; it is not a path. Empty
+and exact lowercase `default` select no overlay. There is no fallback,
+case folding, inherited stack, or automatic selection; a missing selected
+overlay fails. ConfigKit merges mapping fields and replaces other values,
+including sequences and explicit nulls, before applying explicit CLI flags.
+An active overlay needs a selected base file. No-source defaults-only loads
+cannot use imports or an active overlay.
+
+The [composed example](../examples/config.composed.yml) imports two fragments
+and has a selectable [local overlay](../examples/overlays/local.yml). From the
+repository root:
+
+```bash
+go run ./cmd/scriptorium render \
+  --config ./examples/config.composed.yml --config-overlay local \
+  --prompt generic.markdown_summary \
+  --input transcript=./examples/fixtures/transcript.md \
+  --input glossary=./examples/fixtures/glossary.yml
+```
+
+Import and overlay file locations are constrained by ConfigKit;
+*application path values* such as `prompt_dir` remain relative
+to the process working directory even when authored in a fragment or overlay.
+These source constraints are separate from HTTP artifact containment.
 
 | Field | Default | Meaning |
 | --- | --- | --- |
-| `prompt_dir` | unset | Directory containing prompt-definition YAML. `run`, `render`, and `serve` require an effective value. |
+| `prompt_dir` | unset | Promptkit prompt-definition source directory. `run`, `render`, `serve`, and `inspect prompt` require an effective value. |
-| `profile_dir` | unset | Directory containing custom profile YAML. Built-in profiles remain available. |
+| `profile_dir` | unset | Optional custom Promptkit profile source directory overlaid on Promptkit built-ins. |
-| `schema_dir` | `.` | Base directory for relative JSON Schema paths. |
+| `schema_dir` | `.` | Promptkit schema source directory for relative schema paths. |
 | `server.addr` | `:8080` | Address used by `serve`. |
 | `server.artifact_root` | unset | Root that enables HTTP `file` input references. |
-| `server.max_request_bytes` | `16777216` | Maximum encoded HTTP request body bytes; `0` disables the limit. |
+| `server.max_request_bytes` | `16777216` | Maximum encoded HTTP request-body bytes; `0` disables the limit. |
 | `server.max_artifact_bytes` | `16777216` | Maximum HTTP file-input artifact bytes; `0` disables the limit. |
 | `server.max_response_bytes` | `16777216` | Maximum encoded HTTP response bytes; `0` disables the limit. |
-| `defaults.render_format` | `text` | Default `render` output format: `text` or `json`. |
+| `defaults.render_format` | `text` | Default prepared-run output format: `text` or `json`. |
+| `backends` | unset | Optional mapping of custom Promptkit backend IDs to engine-scoped connection and capacity settings. |
+| `transient_retries` | Promptkit default | Optional nonnegative count of additional built-in transient generation attempts. Omitted or `null` delegates to Promptkit; `0` disables additional attempts. |
 
-The three size fields must be zero or greater. The HTTP contract defines how
+The size fields must be zero or greater. The [HTTP API](api.md) defines how
-each limit is enforced and reported. `server.artifact_root` configures the
+each limit is enforced and reported. `server.artifact_root` configures an HTTP
-deployment boundary; see the [HTTP API reference](api.md) for request-path and
+deployment boundary; see [operations](operations.md) for deployment handling.
-containment behavior, and [operations](operations.md) for deployment handling.
 
-## Prompt Definition Files
+The `config validate`, `config show`, `config sources`, and `config explain`
+commands inspect this
+application configuration without creating a Promptkit engine. `show` is a
+resolved inspection snapshot, not necessarily a reloadable file. Application
+validation does not check framework sources, backend connectivity, or credential
+availability. `api_key_env` is an environment-variable *name* and remains
+visible in inspection; its environment value is never read by ConfigKit.
+Ordinary backend `extra_params` values also remain visible, so keep secrets out
+of those fields and protect inspection output as potentially sensitive.
+`config explain --path /server/addr` uses JSON Pointer syntax to show the
+selected field's current value and history from defaults, files, overlays,
+explicit CLI overrides, and normalization. `--path ''` selects the root.
+History includes replaced and removed values; `show` presents the final
+resolved snapshot. Neither renderer looks up credential bytes, and neither
+claims to identify arbitrary secrets in unclassified parameter values.
 
-Prompt definitions are strict YAML files anywhere below `prompt_dir`. A prompt
+## Custom Backends
-is selected by its YAML `id`, not by file path; nested directories are only for
-organization. See [maintained prompt examples](../examples/prompts/).
 
-| Field | Required | Meaning |
+Use `backends` when a profile selects an application-defined backend ID:
-| --- | --- | --- |
-| `id` | yes | Prompt identifier. |
-| `version` | yes | Prompt version. |
-| `default_profile` | no | Profile used when a request omits a profile ID. |
-| `description` | no | Human-readable description. |
-| `session_id` | no | Go-template string rendered from request variables and sent to a compatible provider when non-empty. |
-| `inputs` | no | Declared input metadata. |
-| `messages` | yes | Chat-message templates. |
-| `output` | yes | Output format and validation contract. |
 
-### Inputs And Messages
+```yaml
+backends:
+  local-gpu:
+    endpoint: http://localhost:11434/v1
+    api_key_env: LOCAL_GPU_API_KEY
+    extra_params:
+      provider_option: enabled
+    concurrency_limit: 2
+    queue_capacity: 0
+```
 
-Each `inputs` item has a required `name` and optional `required`,
+Each mapping key is the case-sensitive backend ID. `endpoint` is required;
-`content_type`, and `description` fields. Input names must be unique.
+`api_key_env`, `extra_params`, `concurrency_limit`, and `queue_capacity` are
+optional. `concurrency_limit: 0` leaves the backend unlimited. Omitting
+`queue_capacity` lets Promptkit use its default for a limited backend, while
+an explicit `queue_capacity: 0` disables queueing.
 
-Each message has a required `role`, exactly one of `content` or `content_file`,
+Configuration strictly owns the YAML shape and rejects unknown fields. Promptkit
-and optional `cache_control`. A `content_file` path is relative to the prompt
+validates backend IDs, endpoints, environment-variable names, extra parameters,
-file. `cache_control.type` must be `ephemeral`; its optional `ttl` is `1h`.
+and capacity relationships when Scriptorium constructs its engine. There are no
+backend command-line overrides. Store only an environment-variable name in
+`api_key_env`; raw API-key fields are not accepted.
 
-`session_id` uses the same template variables as messages. Empty rendered
+## Framework Source Mapping
-values are omitted. A rendered value may contain at most 256 Unicode code
-points.
 
-### Output Contract
+Scriptorium passes `prompt_dir`, `profile_dir`, and `schema_dir` to Promptkit
+when constructing its engine. Scriptorium does not redefine or independently
+parse those framework file formats.
 
-| Field | Required | Values or behavior |
+- Prompt selection, versions, message templates, inputs, output contracts, and
-| --- | --- | --- |
+  session IDs are Promptkit contracts.
-| `format` | yes | `text`, `markdown`, or `json`. |
+- Profile fields, numeric ranges, execution defaults, overlay precedence,
-| `validation_mode` | yes | `none`, `basic`, `json`, or `json_schema`. |
+  built-in profiles, and credential rules are Promptkit contracts.
-| `schema_path` | for `json_schema` | Schema path, relative to `schema_dir` unless absolute. |
+- Schema path behavior and generated-content validation are Promptkit
-| `repair_attempts` | no | Integer greater than or equal to `0`; omitted means `0`. |
+  contracts.
 
-## Profile Definition Files
+See the
+[tagged Promptkit format reference](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md)
+for all of those definitions. The files under
+[`examples/prompts`](../examples/prompts/),
+[`examples/profiles`](../examples/profiles/), and
+[`examples/schemas`](../examples/schemas/) are maintained Scriptorium
+application inputs using that tagged format.
 
-Profiles are strict YAML files anywhere below `profile_dir`. A profile is
+Promptkit supplies the opt-in profile IDs `promptkit-openrouter-standard` and
-selected by YAML `id`; nested directories are organizational. See the
+`promptkit-openrouter-auto`. They can be selected as a prompt default or request
-[maintained profile examples](../examples/profiles/).
+profile, and custom profile sources retain precedence. Their effective model
+settings may change with a catalog upgrade; use a complete application-owned
+profile when fixed settings are required. See the tagged format reference for
+the maintained-profile contract.
 
-| Field | Required | Meaning |
+## Credentials And Outbound Behavior
-| --- | --- | --- |
-| `id` | yes | Profile identifier. |
-| `endpoint` | yes | OpenAI-compatible base URL, including its API version path when needed. |
-| `model` | yes | Provider model name. |
-| `temperature` | no | Number from `0` through `2`. |
-| `max_tokens` | no | Integer zero or greater. |
-| `top_p` | no | Number from `0` through `1`. |
-| `timeout_seconds` | no | Per-generation-call deadline in whole seconds; integer zero or greater. |
-| `service_tier` | no | Non-empty provider-specific request tier. |
-| `reasoning_effort` | no | Non-empty provider-specific reasoning setting. |
-| `api_key_env` | no | Environment-variable name containing the API key. |
-| `extra_params` | no | JSON-compatible provider-specific outbound request fields. |
 
-Execution defaults before profile and request overrides are `temperature: 0`,
+Scriptorium maps `--api-key-env` and HTTP `model.api_key_env` into Promptkit
-`max_tokens: 0`, `top_p: 1`, and `timeout_seconds: 600`. Profile numeric values
+request overrides. Keep secret values in environment variables and store only
-merge by non-zero value. Request overrides preserve presence, so an explicit
+their names in configuration or framework source files. Do not place raw keys
-zero can override a profile value. For `timeout_seconds`, explicit request zero
+in configuration, prompts, profiles, CLI arguments, examples, or HTTP
-disables the generation deadline while retaining the caller context and the
+payloads.
-built-in client's transport cap. See the
-[OpenAI-compatible integration contract](integrations/openai-compatible-chat.md#authentication-and-timeout)
-for the complete timeout interaction.
 
-Custom profiles take precedence over built-ins with the same ID. Invalid custom
+An optional `api_key_env` whose environment value is absent or empty can result
-profiles are errors; they do not fall back to a built-in profile. Raw `api_key`
+in an unauthenticated provider request. A profile that declares credentials
-is rejected. Use `api_key_env`, or the public Go package's request-scoped key
+required still fails as an invalid request when no credential source is
-mechanism described in the [package contract](consumers/pkg-scriptorium.md).
+selected, and fails with `ErrAPIKeyEnvMissing` when its selected environment
+source is absent or empty. Scriptorium never reads or emits the environment
+value itself.
 
-`extra_params` keys must be non-empty and cannot be `model`, `session_id`,
+Unset optional provider controls are omitted from compatible provider requests.
-`messages`, `temperature`, `max_tokens`, `top_p`, `service_tier`,
+A positive Promptkit `repair_attempts` budget can add provider calls, latency,
-`reasoning_effort`, or `response_format`.
+token use, and cost; see the tagged format reference for its permitted values
+and validation-mode requirements.
 
-### Built-In Profile Catalog
+Promptkit's built-in client makes up to two additional attempts for eligible
+transient HTTP statuses by default. The application `transient_retries` setting
+changes that budget for its constructed engine; an explicit `run` request
+override takes precedence. This can increase latency, request count, and cost.
+Each initial or repair generation has its own transient budget; an injected
+client retains its own retry behavior. The tagged integration contract owns
+eligibility and timing.
 
-Each embedded profile uses `OPENROUTER_API_KEY`.
+Promptkit's
-
+[OpenAI-compatible integration contract](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/integrations/openai-compatible-chat.md)
-| Provider | ID | Model |
+defines outbound authentication, provider request mapping, transport limits,
-| --- | --- | --- |
+and timeout layering.
-| aion-labs | `aion-2` | `aion-labs/aion-2.0` |
-| anthropic | `claude-fable-latest` | `~anthropic/claude-fable-latest` |
-| anthropic | `claude-haiku-latest` | `~anthropic/claude-haiku-latest` |
-| anthropic | `claude-opus-latest` | `~anthropic/claude-opus-latest` |
-| anthropic | `claude-sonnet-latest` | `~anthropic/claude-sonnet-latest` |
-| deepseek | `deepseek-3-2` | `deepseek/deepseek-v3.2` |
-| deepseek | `deepseek-4-flash` | `deepseek/deepseek-v4-flash` |
-| deepseek | `deepseek-4-pro` | `deepseek/deepseek-v4-pro` |
-| google | `gemini-2-flash` | `google/gemini-2.5-flash` |
-| google | `gemini-2-flash-lite` | `google/gemini-2.5-flash-lite` |
-| google | `gemini-2-pro` | `google/gemini-2.5-pro` |
-| google | `gemini-3-flash-lite` | `google/gemini-3.1-flash-lite` |
-| google | `gemini-flash-latest` | `~google/gemini-flash-latest` |
-| google | `gemini-pro-latest` | `~google/gemini-pro-latest` |
-| google | `gemma-4-31b` | `google/gemma-4-31b-it:exacto` |
-| minimax | `minimax-m2` | `minimax/minimax-m2.5` |
-| minimax | `minimax-m3` | `minimax/minimax-m3` |
-| mistral | `mistral-large-2512` | `mistralai/mistral-large-2512` |
-| mistral | `mistral-medium-3-5` | `mistralai/mistral-medium-3-5` |
-| mistral | `mistral-small-3` | `mistralai/mistral-small-3.2-24b-instruct` |
-| mistral | `mistral-small-4` | `mistralai/mistral-small-2603` |
-| nvidia | `nemotron-3-ultra` | `nvidia/nemotron-3-ultra-550b-a55b` |
-| openai | `gpt-5-mini` | `openai/gpt-5.4-mini` |
-| openai | `gpt-5-nano` | `openai/gpt-5.4-nano` |
-
-## Schemas
-
-Schemas are JSON files, normally below `schema_dir`. `json_schema` output
-requires a `schema_path`. Relative paths resolve from `schema_dir`; absolute
-paths are used directly. Referenced nested schemas use relative paths and are
-not discovered by basename. An unreadable or invalid schema is a runtime
-validation error; generated content that fails JSON or schema validation is a
-validation result.
-
-## Credentials
-
-Keep secrets in environment variables. Store only an environment-variable name
-in `api_key_env`; do not place raw keys in configuration, prompt or profile
-files, CLI arguments, examples, or HTTP payloads.
 
 ## Related References
 
 - [CLI reference](cli.md)
 - [HTTP API reference](api.md)
-- [OpenAI-compatible outbound contract](integrations/openai-compatible-chat.md)
+- [Operations guide](operations.md)
+- [Promptkit framework formats](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md)

docs/consumers/api.md

@@ -1,45 +1,23 @@
 # Consumer Integration Overview
 
-This guide helps applications choose a Scriptorium interface and understand
+Scriptorium exposes executable interfaces. Choose between a local subprocess
-their responsibilities. The linked contracts own interface syntax and wire
+and the HTTP service according to the boundary your application needs.
-semantics.
 
 | Interface | Use when |
 | --- | --- |
-| Go package | The consumer is Go and needs typed requests, results, or an injected LLM client. |
+| CLI subprocess | The consumer needs a synchronous local process boundary or prepared output. |
-| CLI subprocess | The consumer needs process isolation or is not written in Go. |
 | HTTP API | The consumer needs a service boundary or remote access. |
 
-- Go package: [package contract](pkg-scriptorium.md)
 - CLI subprocess: [subprocess integration](../integrations/subprocess.md)
 - HTTP service: [HTTP API reference](../api.md)
-- Prompt, profile, schema, and credential configuration: [configuration reference](../config.md)
+- Application configuration: [configuration reference](../config.md)
 
-## Minimal Go Use
+Go applications that need an in-process prompt framework should import
-
+Promptkit directly. The tagged
-```go
+[Promptkit Go consumer guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md)
-engine, err := scriptorium.NewEngine(scriptorium.Config{
+owns that interface; Scriptorium does not provide a Go library package.
-	PromptDir:  "./examples/prompts",
+Consumers arriving from the former Scriptorium Go API should follow the
-	ProfileDir: "./examples/profiles",
+[migration guide](migrating-to-promptkit.md).
-})
-if err != nil {
-	return err
-}
-
-prepared, err := engine.Prepare(ctx, scriptorium.RunRequest{
-	PromptID: "generic.markdown_summary",
-	Inputs: map[string]scriptorium.ArtifactRef{
-		"transcript": scriptorium.File("./examples/fixtures/transcript.md"),
-	},
-})
-if err != nil {
-	return err
-}
-_ = prepared
-```
-
-For a maintained program, see
-[`examples/go-library/prepare`](../../examples/go-library/prepare).
 
 ## Consumer Responsibilities
 
@@ -47,13 +25,14 @@ Consumers are responsible for:
 
 - selecting and deploying prompt, profile, and schema assets;
 - supplying required inputs and template variables;
-- supplying credentials through the applicable interface;
+- supplying credentials through the chosen interface;
-- protecting rendered prompts and generated artifacts as potentially sensitive;
+- protecting rendered prompts and generated artifacts as potentially
+  sensitive;
 - deciding whether validation-failed output is usable; and
 - retrying only when another model call is acceptable.
 
-Scriptorium does not persist run state. A retry can produce different output and
+Scriptorium does not persist run state. A retry can produce different output
-can incur another provider request. CLI exit behavior belongs to the
+and can incur another provider request. CLI exits belong to the
-[CLI reference](../cli.md); HTTP status behavior belongs to the
+[CLI reference](../cli.md), HTTP status behavior belongs to the
-[HTTP API reference](../api.md); package errors and results belong to the
+[HTTP API reference](../api.md), and framework semantics belong to
-[package contract](pkg-scriptorium.md).
+[Promptkit v0.11.0](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md).

docs/consumers/migrating-to-promptkit.md

@@ -0,0 +1,109 @@
+# Migrate From Scriptorium To Promptkit
+
+## Supported Migration Boundary
+
+Scriptorium `v0.11.1` at
+`gitea.maximumdirect.net/eric/scriptorium` is the final release that provides
+the former in-process Go framework. Promptkit `v0.11.0` at
+`gitea.maximumdirect.net/eric/promptkit` is the destination for that framework
+API. Scriptorium `v0.12.0` and later provide the CLI and HTTP application only.
+
+There is no Scriptorium compatibility facade, alias package, forwarding
+package, or deprecated wrapper. A consumer that cannot migrate may remain
+pinned to Scriptorium `v0.11.1`, but that framework-bearing line does not
+provide the slim application release.
+
+## Update A Go Consumer
+
+Start from a clean consumer checkout and review the pending diff before
+committing it. Add the published Promptkit module:
+
+```sh
+go get gitea.maximumdirect.net/eric/promptkit@v0.11.0
+```
+
+For an ordinary consumer that imports the former root package under its
+default name, replace the exact import and package qualifier, then format the
+changed Go files:
+
+```sh
+git grep -l \
+  '"gitea.maximumdirect.net/eric/scriptorium"' \
+  -- '*.go' |
+  while IFS= read -r go_file
+  do
+    perl -pi -e \
+      's{"gitea.maximumdirect.net/eric/scriptorium"}{"gitea.maximumdirect.net/eric/promptkit"}g; s{\bscriptorium\.}{promptkit.}g' \
+      "$go_file"
+    gofmt -w "$go_file"
+  done
+```
+
+Inspect the resulting diff. Consumers that used an import alias should retain
+or deliberately rename that alias instead of applying the qualifier
+replacement mechanically.
+
+Remove the now-unused Scriptorium requirement through module tidiness and run
+the consumer's complete tests:
+
+```sh
+go mod tidy
+go test ./...
+```
+
+Confirm that `go.mod` selects Promptkit `v0.11.0` and that no Go file imports
+the former Scriptorium package:
+
+```sh
+test "$(
+  go list -m -f '{{.Path}}@{{.Version}}' \
+    gitea.maximumdirect.net/eric/promptkit
+)" = 'gitea.maximumdirect.net/eric/promptkit@v0.11.0'
+if git grep -n \
+  'gitea.maximumdirect.net/eric/scriptorium' \
+  -- '*.go'
+then
+  printf '%s\n' 'a former Scriptorium Go import remains' >&2
+  exit 1
+fi
+```
+
+## Compatibility And Additions
+
+Promptkit preserves the established engine, request, result, profile,
+source-option, model-client, artifact, validation-value, and public-error
+shapes where practical. Exact declarations and current behavior belong to the
+tagged [Promptkit consumer guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md)
+and Go source.
+
+Promptkit also includes migration-relevant public contracts that were not in
+Scriptorium `v0.11.1`:
+
+- [`WithArtifactReader`](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/engine.go#L169-L174)
+  and the
+  [`ArtifactReader` declaration](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/types.go#L315)
+  provide the artifact-reading extension described by the tagged
+  [extension-interface guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md#extension-interfaces).
+- [`ErrProfileRequired` and `ErrAPIKeyEnvMissing`](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/engine.go#L33-L48)
+  provide the specific identities described by the tagged
+  [error guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md#handle-errors).
+
+Use those tagged owners for exact signatures, wrapping guarantees, and
+extension behavior.
+
+## Verify Consumer Behavior
+
+Source compatibility is only the first check. Exercise the behavior the
+consumer actually relies upon, especially:
+
+- prompt, profile, and schema source selection;
+- direct and environment-based credentials;
+- caller, generation, and transport timeout layering;
+- output validation and validation-failure handling;
+- injected model-client and artifact-reader extensions; and
+- every `errors.Is` branch used for recovery or classification.
+
+Also verify any serialized values, redaction expectations, filesystem policy,
+and provider integration behavior that crosses the consumer's own boundary.
+Promptkit owns the in-process framework contract; Scriptorium owns only its
+executable CLI and HTTP application interfaces.

docs/consumers/pkg-scriptorium.md

@@ -1,203 +0,0 @@
-# Package `scriptorium`
-
-Import path:
-
-```go
-import "gitea.maximumdirect.net/eric/scriptorium"
-```
-
-This is the canonical public Go contract for in-process prompt preparation and
-execution. Prompt, profile, and schema file formats are defined in the
-[configuration reference](../config.md).
-
-## Engine Construction
-
-`NewEngine(Config, ...Option)` constructs an engine. `Config` has these
-fields:
-
-| Field | Meaning |
-| --- | --- |
-| `PromptDir` | Prompt-definition directory, required unless a prompt source option is supplied. |
-| `ProfileDir` | Optional custom profile directory over built-ins. |
-| `SchemaDir` | Schema directory; empty uses `.`. |
-| `Timeout` | Transport-wide safety cap for the built-in OpenAI-compatible client when `HTTPClient` is absent or has a non-positive timeout. A non-positive value uses the internal ten-minute default. |
-| `HTTPClient` | Optional HTTP client for that built-in client. It is cloned; a positive `Timeout` on it is the transport cap and takes precedence over `Config.Timeout`. A non-positive client timeout is treated as unset. |
-
-Nil options are ignored. Invalid construction, including
-`WithLLMClient(nil)` and `WithArtifactReader(nil)`, returns an error matching
-`ErrInvalidConfig`.
-
-Profile and request `timeout_seconds` values select a per-generation-call
-deadline independently of the transport cap. An explicit request override of
-zero disables that generation deadline only. The complete interaction with the
-caller context is defined in the
-[OpenAI-compatible integration contract](../integrations/openai-compatible-chat.md#authentication-and-timeout).
-
-Source options replace their matching directory source:
-
-- prompts: `WithPromptFS(fsys, root)`, `WithPromptFile(path)`;
-- profiles: `WithProfileFS(fsys, root)`, `WithProfileFile(path)`, and
-  `WithProfiles(profiles...)`;
-- schemas: `WithSchemaFS(fsys, root)`, `WithSchemaFile(path)`; and
-- LLM client: `WithLLMClient(client)`; and
-- artifact reader: `WithArtifactReader(reader)`.
-
-`fs.FS` prompt-content and schema paths stay inside their configured roots.
-Single-file prompt and profile sources are selected by their YAML `id`, not
-their file names. `WithPromptFile` resolves relative `content_file` paths from
-the prompt file's directory. `WithSchemaFile` exposes its schema by the schema
-file's base name. In-memory profiles take precedence over an explicit or
-directory-backed profile source, which in turn takes precedence over built-ins.
-File and filesystem sources use the format and credential rules in the
-[configuration reference](../config.md).
-
-## Prepare And Run
-
-`Prepare(ctx, request)` resolves the prompt, profile, input artifacts,
-validation contract, and rendered messages without calling an LLM.
-`Run(ctx, request)` performs that preparation, calls the configured client,
-and validates generated content.
-
-```go
-engine, err := scriptorium.NewEngine(scriptorium.Config{
-	PromptDir:  "./examples/prompts",
-	ProfileDir: "./examples/profiles",
-})
-if err != nil {
-	return err
-}
-
-prepared, err := engine.Prepare(ctx, scriptorium.RunRequest{
-	PromptID: "generic.markdown_summary",
-	Inputs: map[string]scriptorium.ArtifactRef{
-		"transcript": scriptorium.File("./examples/fixtures/transcript.md"),
-	},
-})
-if err != nil {
-	return err
-}
-_ = prepared.Messages
-```
-
-The maintained package example is
-[`examples/go-library/prepare`](../../examples/go-library/prepare).
-
-`PreparedRun` exposes prompt, selected-profile, effective-model, output
-contract, structured-output, input-hash, rendered-message, and timing
-information. It does not include a resolved API key, model output, validation
-result, or target-presence metadata.
-
-`RunResult` adds run ID, artifact, raw output, validation, model metadata,
-usage, and duration. Generated-content validation failures return a result with
-`Validation.Status == ValidationFailed`; schema or validator runtime failures
-return an error matching `ErrValidation`.
-
-## Public Values
-
-`ArtifactRef` has `Type`, `URI`, and `Body`; `Artifact` has `Name`,
-`ContentType`, `Body`, `URI`, `Size`, and `Hash`. `ExecutionTarget` exposes the
-effective endpoint, model, numeric settings, credential-environment name,
-service tier, reasoning effort, and extra parameters. `ValidationResult`
-contains status, mode, errors, schema path, repair attempts, and validity.
-
-The exported constants define these serialized values:
-
-- artifact types: `inline` and `file`;
-- output formats: `text`, `markdown`, and `json`;
-- validation modes: `none`, `basic`, `json`, and `json_schema`; and
-- validation statuses: `passed`, `failed`, and `skipped`.
-
-`TokenUsage` reports prompt, completion, total, cached, and cache-write token
-counts. `RenderedPrompt`, `RenderedMessage`, `CacheControl`, and
-`StructuredOutputSpec` are the public shapes used by injected LLM clients.
-
-`ArtifactReader` implements
-`Read(context.Context, ArtifactRef) (*Artifact, error)`. Supplying it through
-`WithArtifactReader` replaces, rather than extends, the engine's default inline
-and file reader for every input. Omitting the option retains that default;
-`WithArtifactReader(nil)` makes engine construction fail with
-`ErrInvalidConfig`.
-
-Reader failures are surfaced as errors matching `ErrArtifactLoad` while
-preserving the reader's original error identity for `errors.Is`. A `(nil, nil)`
-reader response is also an artifact-load failure. Readers are responsible for
-artifact metadata, although the engine assigns the input-map name when the
-returned name is empty; readers should not retain or mutate caller values.
-
-## Requests, Inputs, And Overrides
-
-`RunRequest` fields are `PromptID`, `PromptVersion`, `ProfileID`,
-`APIKey`, `Inputs`, `Vars`, `Execution`, `Validation`, and
-`Metadata`.
-
-Input helpers are:
-
-- `File(path)` for a file-backed artifact;
-- `Inline(body)` for inline content; and
-- `InlineWithURI(uri, body)` for inline content with URI metadata.
-
-Required declared inputs must be supplied. Template rendering must also resolve
-every input name the prompt actually references. Extra entries in `Inputs`
-are not rejected solely because they are undeclared.
-
-`ExecutionTargetOverride` supplies endpoint, model, credential-environment,
-service-tier, reasoning-effort, and extra-parameter overrides. Its numeric
-fields (`Temperature`, `MaxTokens`, `TopP`, and `TimeoutSeconds`) are
-pointers so explicit zero values are preserved. `OutputContract` supplies
-`Format`, `ValidationMode`, `SchemaPath`, and `RepairAttempts`.
-
-`ExtraParams` accepts JSON-compatible values: strings, booleans, finite
-numbers, objects with string keys, arrays or slices, and nil. Unsupported
-values, non-string map keys, non-finite floats, and cycles return
-`ErrInvalidConfig` for profiles or `ErrInvalidRequest` for request
-overrides.
-
-## Profiles And Credentials
-
-`OpenAICompatibleProfile(OpenAICompatibleProfileConfig)` creates an
-in-memory `Profile`. Its public fields are `ID`, `Endpoint`, `Model`,
-`Temperature`, `MaxTokens`, `TopP`, `TimeoutSeconds`, `ServiceTier`,
-`ReasoningEffort`, `APIKeyRequired`, and `ExtraParams`.
-`WithProfiles` rejects duplicate IDs in one call.
-
-A direct `RunRequest.APIKey` is request-scoped and takes precedence over
-`api_key_env` for the built-in client. It is excluded from JSON output and
-from `PreparedRun` and `RunResult`. The package's `String` and
-`GoString` methods report only whether a direct key is set. Do not use
-reflection-based dumps of request structs, which can bypass that redaction.
-
-## Injected LLM Clients
-
-`LLMClient` implements:
-
-```go
-Generate(context.Context, GenerateRequest) (*GenerateResponse, error)
-```
-
-Injected clients receive the rendered prompt, effective execution target, numeric
-target-presence metadata, optional structured-output specification, and direct
-request API key. `GenerateResponse` returns content and `TokenUsage`.
-Custom clients should avoid logging raw prompts or credentials.
-
-## Errors
-
-Public methods preserve these sentinel checks through `errors.Is`:
-
-- `ErrInvalidConfig`
-- `ErrInvalidRequest`
-- `ErrPromptNotFound`
-- `ErrProfileNotFound`
-- `ErrProfileRequired`
-- `ErrPromptLoad`
-- `ErrProfileLoad`
-- `ErrAPIKeyEnvMissing`
-- `ErrArtifactLoad`
-- `ErrPromptRender`
-- `ErrLLMGenerate`
-- `ErrValidation`
-
-`ErrProfileRequired` and `ErrAPIKeyEnvMissing` each also match
-`ErrInvalidRequest`, so callers can select either the broad request category or
-the specific condition.
-
-For the HTTP interface, see the [HTTP API reference](../api.md).

docs/development.md

@@ -1,63 +1,59 @@
 # Development
 
-This is the contributor entry point for Scriptorium. Use the task-specific
+This is the contributor entry point for Scriptorium. Scriptorium is an
-reading guide below before making changes. Canonical architecture, contracts,
+application that consumes the public
-component behavior, and policies remain in their owning documents.
+[Promptkit v0.11.0 package](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md);
+framework implementation work belongs in Promptkit. Application configuration
+uses ConfigKit v0.4.0; keep Scriptorium's schema and source selection local.
 
 ## Initial Orientation
 
-Before starting work:
+Before recommending, planning, or implementing work:
 
-1. inspect the working tree and preserve unrelated changes;
+1. read the [agent policy](policy/agents.md);
-2. read the architecture policy for code or design work;
+2. inspect the working tree and preserve unrelated changes;
-3. read the policy, contract, and internal documents listed for the task;
+3. read the [architecture policy](policy/architecture.md);
-4. inspect the relevant implementation and tests before deciding how to change
+4. follow the task-specific contracts and internal documents below; and
-   them.
+5. inspect the relevant implementation and tests before changing them.
 
-Start with:
+Also read the [documentation policy](policy/documentation.md) before changing
-
+documentation and the [testing policy](policy/testing.md) before changing
-- [Architecture policy](policy/architecture.md) for system boundaries,
+tests.
-  invariants, and non-goals;
-- [Internal component overview](internal/overview.md) for the current package
-  and component map;
-- [Documentation policy](policy/documentation.md) before changing
-  documentation;
-- [Testing policy](policy/testing.md) before adding, rewriting, or deleting
-  tests.
 
 ## Task-Specific Reading Guide
 
 | Task | Read before changing |
 | --- | --- |
 | Repository orientation or component responsibility | [Internal component overview](internal/overview.md) and [architecture policy](policy/architecture.md) |
-| Public Go package or engine behavior | [Go package consumer contract](consumers/pkg-scriptorium.md), [internal component overview](internal/overview.md), [runner internals](internal/runner.md), [adapter internals](internal/adapters.md), and [source internals](internal/sources.md) |
+| CLI commands, flags, output, or exit behavior | [CLI contract](cli.md) and [adapter internals](internal/adapters.md) |
-| CLI commands, flags, output, or exit behavior | [CLI contract](cli.md), [internal component overview](internal/overview.md), and [adapter internals](internal/adapters.md) |
+| HTTP routes, DTOs, limits, status mapping, or artifact policy | [HTTP API contract](api.md), [adapter internals](internal/adapters.md), and [source internals](internal/sources.md) |
-| HTTP routes, DTOs, limits, or status mapping | [HTTP API contract](api.md), [internal component overview](internal/overview.md), [adapter internals](internal/adapters.md), and [source internals](internal/sources.md) |
+| Application configuration or precedence | [Configuration contract](config.md), [adapter internals](internal/adapters.md), [source internals](internal/sources.md), and `internal/config` definition/load tests |
-| Application configuration | [Configuration contract](config.md), [internal component overview](internal/overview.md), [adapter internals](internal/adapters.md), and [source internals](internal/sources.md) |
+| Prepared-run presentation | [CLI contract](cli.md), [adapter internals](internal/adapters.md), and `internal/format` |
-| Prompt, profile, schema, or artifact loading | [Configuration contract](config.md), [internal component overview](internal/overview.md), and [source internals](internal/sources.md) |
+| Prompt, profile, schema, generation, or validation semantics | [Promptkit framework formats](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md) and the [Promptkit consumer guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md) |
-| Runner orchestration, rendering, validation, or repair | [Runner internals](internal/runner.md) and [source internals](internal/sources.md) |
+| OpenAI-compatible outbound behavior or timeout layering | [Promptkit integration contract](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/integrations/openai-compatible-chat.md) |
-| OpenAI-compatible request or response behavior | [OpenAI-compatible integration](integrations/openai-compatible-chat.md), [LLM internals](internal/llm.md), [runner internals](internal/runner.md), and [adapter internals](internal/adapters.md) |
 | Subprocess behavior | [Subprocess integration](integrations/subprocess.md) and [CLI contract](cli.md) |
 | Runtime operation or recovery | [Operations](operations.md) |
-| Examples or copyable assets | The owning contract for the demonstrated behavior and the related files under `examples/` |
+| Dependencies, copied assets, or attribution | The [OSS policy](policy/oss.md), [component attributions](oss/attribution.md), and [architecture policy](policy/architecture.md) |
-| Architecture decisions or future work | The [documentation policy](policy/documentation.md), relevant accepted ADRs such as [ADR 0001](adr/0001-adopt-canonical-documentation-ownership.md), and relevant roadmap documents under `roadmap/` |
+| Release documentation, packaging, or publication | The [release policy](policy/release.md), [OSS policy](policy/oss.md), [release procedure](release.md), [hosted release workflow](../.woodpecker/release.yml), and [architecture policy](policy/architecture.md) |
+| Examples or copyable assets | The owning Scriptorium contract, the relevant [Promptkit format contract](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md), and the related files under `examples/` |
+| Architecture decisions or future work | The [documentation policy](policy/documentation.md), relevant accepted ADRs, and relevant roadmap documents |
 
-For cross-cutting changes, follow every applicable row. Internal component
+Cross-project changes land and release in Promptkit before Scriptorium adopts
-documents own detailed subsystem change recipes.
+the tagged version. Do not commit a Go workspace, local replacement, vendored
+Promptkit source, or an import of a Promptkit `internal` package.
 
 ## Baseline Validation
 
-Use focused checks while iterating, then run validation proportionate to the
+For code changes, run:
-change and the risks described by the testing policy.
-
-The repository-level baseline for code changes is:
 
 ```bash
 go test ./...
+go test -race ./...
 go vet ./...
 go build ./cmd/scriptorium
 ```
 
-Documentation-only work does not require the full Go suite unless it changes
+Check formatting with `gofmt`, run `git diff --check`, and validate affected
-commands, examples, generated output, or another behavior that the suite
+examples and documentation links. Documentation-only work does not require
-validates. Always check changed links, paths, examples, and canonical ownership.
+unrelated new tests, but commands and examples changed by documentation must be
+run.

docs/integrations/openai-compatible-chat.md

@@ -1,121 +0,0 @@
-# OpenAI-Compatible Chat Integration
-
-This is the outbound wire contract for Scriptorium's OpenAI-compatible
-chat-completions client.
-
-## Endpoint And Method
-
-Scriptorium uses the request endpoint override when present; otherwise it uses
-the configured client base URL. It removes a trailing slash and sends
-`POST /chat/completions`.
-
-For example, `http://localhost:8000/v1` becomes
-`http://localhost:8000/v1/chat/completions`.
-
-## Request Payload
-
-The payload always contains `model` and rendered `messages`. It additionally
-contains these fields when applicable:
-
-| Field | Inclusion |
-| --- | --- |
-| `session_id` | Non-empty rendered prompt session ID. |
-| `temperature` | Non-zero effective value or an explicit zero override. |
-| `max_tokens` | Non-zero effective value or an explicit zero override. |
-| `top_p` | Non-zero effective value or an explicit zero override. |
-| `service_tier` | Any non-empty configured value. |
-| `reasoning_effort` | Any non-empty configured value. |
-| `response_format` | Structured output is requested. |
-| provider-specific fields | Flattened from `extra_params`. |
-
-`service_tier` and `reasoning_effort` are forwarded without a provider value
-catalog; the selected backend decides which values it supports.
-
-`extra_params` are top-level JSON fields, not a nested object. Keys cannot be
-empty or collide with `model`, `session_id`, `messages`, `temperature`,
-`max_tokens`, `top_p`, `service_tier`, `reasoning_effort`, or
-`response_format`. Values must be JSON-serializable.
-
-A rendered `session_id` is sent as a top-level JSON field, not as a header.
-Empty values are omitted. The maximum length is 256 Unicode code points.
-
-Messages without cache control use string `content`. A message with cache
-control uses one text block:
-
-```json
-{
-  "role": "system",
-  "content": [{
-    "type": "text",
-    "text": "rendered text",
-    "cache_control": {"type": "ephemeral", "ttl": "1h"}
-  }]
-}
-```
-
-When the prompt omits cache-control `ttl`, the payload omits `ttl`.
-Structured JSON Schema output is sent as:
-
-```json
-{
-  "response_format": {
-    "type": "json_schema",
-    "json_schema": {
-      "name": "schema name",
-      "strict": true,
-      "schema": {"type": "object"}
-    }
-  }
-}
-```
-
-## Authentication And Timeout
-
-When a direct request API key is present, Scriptorium sends
-`Authorization: Bearer <key>` and does not read `api_key_env`. Otherwise, it
-resolves the configured non-empty `api_key_env` at request time and sends the
-same header. If neither mechanism supplies a key, it sends no
-`Authorization` header.
-
-The transport-wide safety cap is chosen at client construction. A positive
-timeout on a supplied `http.Client` takes precedence over a positive
-`Config.Timeout`; if neither is positive, the internal ten-minute default is
-used. The supplied client is cloned, and zero or negative timeout values are
-treated as unset.
-
-Separately, a positive effective `timeout_seconds` creates a deadline for each
-outbound generation call. Its value follows the execution-setting hierarchy:
-an explicit request override, then a non-zero profile value, then the
-600-second framework default. An explicit request override of zero disables
-only this generation deadline. Negative values are rejected before a request
-is sent.
-
-The complete observable rule is that the earliest caller-context deadline,
-transport cap, or positive generation deadline terminates the call. Transport
-and cancellation failures retain the generation-error classification.
-
-## Response Subset And Failures
-
-A successful provider response must supply non-empty
-`choices[0].message.content`. Scriptorium reads these optional or required
-usage fields when present:
-
-- `usage.prompt_tokens`
-- `usage.completion_tokens`
-- `usage.total_tokens`
-- `usage.prompt_tokens_details.cached_tokens`
-- `usage.cache_write_tokens`
-
-Missing cache usage is reported as zero. Invalid JSON, an empty choices array,
-or empty first-choice content is a malformed provider response. Network and
-request-construction failures, non-2xx responses, and malformed responses fail
-the outbound call. Provider response bodies are not exposed by this client.
-
-The client does not implement built-in retries, tool calls, top-level
-`cache_control`, or multi-request payload modes.
-
-## Related References
-
-Prompt schema preparation and runner orchestration are described in
-[runner internals](../internal/runner.md). Prompt and profile configuration is
-defined by the [configuration reference](../config.md).

docs/integrations/subprocess.md

@@ -17,6 +17,15 @@ Pass required API-key environment variables through the child environment. Do
 not place raw API keys in arguments. Keep the environment limited to the values
 needed for the selected profile.
 
+For application-only preflight, invoke `scriptorium config validate`; it exits
+0 with empty stdout when the application configuration loads, but does not
+prove that Promptkit sources or credentials are usable. `config show` emits
+resolved YAML and `config sources` emits newline-terminated JSON provenance.
+All three use the same source selection and explicit overrides as execution
+commands and require separate stderr capture for diagnostics. Their output can
+include source paths, identifiers, credential reference names, and ordinary
+backend parameters; treat it as potentially sensitive.
+
 ## Streams And Output Ownership
 
 Capture stdout and stderr separately. Stdout contains the requested artifact or
@@ -29,6 +38,13 @@ When using `--out`, the caller owns the output path, its permissions, and
 cleanup. Treat rendered prompts, generated artifacts, stdout, and stderr as
 potentially sensitive.
 
+For `run`, an optional [execution report file](../cli.md) contains terminal
+metadata separate from generated stdout or `--out`. The caller owns that
+path's permissions and retention. Output and report files are not a
+transaction: one may be written when the other fails, and a preexisting report
+may remain when the invocation has no terminal event. Check the exit status
+and diagnostics rather than assuming a report path contains this run's data.
+
 ## Cancellation And Recovery
 
 A CLI invocation performs one synchronous request and creates no durable run
@@ -37,5 +53,11 @@ process according to its own process-management policy. A later invocation is a
 new request and can make another model call; there is no resume or checkpoint
 protocol.
 
+For `run`, callers may set the [whole-run deadline](../cli.md) to bound the
+engine invocation. It is separate from the per-attempt generation timeout and
+does not include child startup or output writing. A deadline failure exits 1;
+supervisors still own process termination when they need to stop the child
+outside that engine interval.
+
 For deployment, filesystem permissions, and sensitive-artifact handling, see
 the [operations guide](../operations.md).

docs/internal/adapters.md

@@ -2,115 +2,135 @@
 
 ## Purpose
 
-Adapters translate external inputs into public engine requests and translate
+Scriptorium adapters translate executable inputs into Promptkit public requests
-public results or errors back to their interface. They own IO and presentation
+and translate Promptkit results or errors back to CLI or HTTP behavior. They
-mechanics; use-case decisions remain behind the root `scriptorium` facade.
+own IO and presentation mechanics, not framework decisions.
 
-External contracts are canonical in the [CLI reference](../cli.md), [HTTP API
+External contracts are canonical in the [CLI reference](../cli.md) and
-reference](../api.md), and [Go package contract](../consumers/pkg-scriptorium.md).
+[HTTP API reference](../api.md). Promptkit's public engine contract is
+described by its tagged
+[Go consumer guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md).
 
 ## Components And Collaborators
 
 - `cmd/scriptorium` passes process arguments and streams to
   `internal/adapter/cli`.
-- `internal/adapter/cli` parses commands, resolves application settings through
+- `internal/adapter/cli` resolves settings through `internal/config`,
-  `internal/config`, constructs the public engine, and owns process output
+  constructs `promptkit.Engine`, maps CLI values to `promptkit.RunRequest`,
-  handling.
+  and owns output files, summaries, and exit codes.
-- `internal/adapter/http` decodes DTOs, maps them to public run requests,
+- `internal/config` delegates application YAML decoding, default resolution,
-  calls its local public `Runner` interface, and maps public errors and results
+  overrides, and validation ordering to ConfigKit. The CLI supplies only
-  to HTTP DTOs.
+  explicitly visited application flags as overrides and renders safe structured
-- The root `scriptorium` package maps its public types and options to internal
+  load diagnostics on stderr.
-  collaborators and maps selected internal errors to public sentinels.
+- `internal/adapter/http` strictly decodes request DTOs, maps them to Promptkit
-- `internal/format` formats public prepared runs for the CLI.
+  public values, calls its adapter-owned `Runner` interface, and maps results
+  and errors to HTTP DTOs.
+- `internal/format` renders `promptkit.PreparedRun` values as deterministic text
+  or JSON.
+- `internal/report` maps Promptkit's terminal execution event to a small
+  application-owned value without invoking the engine or writing output.
 
 ## Wiring Flows
 
 ### CLI
 
-The CLI resolves configuration before constructing the public engine. `run`
+`run` calls `promptkit.Engine.Run`; `render` calls
-calls `Engine.Run` with a public request and `render` calls `Engine.Prepare`
+`promptkit.Engine.Prepare`. Both share request mapping for prompt ID/version
-with the same request mapping. `serve` constructs the HTTP-owned restricted
+and profile selection, optional file inputs, variables, and presence-aware
-artifact reader, injects it with `WithArtifactReader`, passes the resulting
+execution overrides. Omitted framework settings remain zero values so Promptkit
-engine directly to the HTTP handler, and starts the server.
+resolves its own defaults and definition-required inputs.
+The application retry setting enters shared engine construction, while a
+run/render flag enters only the mapped request. The server uses the same engine
+setting and retains one backend admission state. Render prepares without
+generation.
 
-Parser state records whether numeric runtime values were explicitly supplied.
+`inspect prompt` maps the selected ID and optional version to
-That presence is carried into `scriptorium.ExecutionTargetOverride`, allowing
+`promptkit.Engine.InspectPrompt`, then formats Scriptorium-owned inspection
-the engine to distinguish omitted values from explicit zero overrides.
+data. It constructs the same configuration-aware engine but does not perform
+preparation or generation.
+
+`inspect profile` maps an explicit profile ID to `Engine.InspectProfile` and
+formats a safe application-owned effective profile view. It intentionally does
+not require prompt, schema, or artifact sources.
+
+The `config` family loads the same application ConfigKit result once and uses
+its validation, effective-output, source, and explanation views directly. It
+does not construct a Promptkit engine. The CLI maps source records into a small
+JSON DTO for `sources`; `show` and `explain` use ConfigKit's own writers.
+
+`serve` constructs Scriptorium's restricted HTTP artifact reader, injects it
+with `promptkit.WithArtifactReader`, passes the engine through the HTTP
+adapter's consumer-owned `Runner` interface, and starts the server.
+
+The command paths assemble the engine from the same resolved prompt, profile,
+and schema directories plus configured custom backends. Each backend is mapped
+to Promptkit's public `Backend` value and registered during engine construction,
+so one constructed server engine retains one immutable backend registry and its
+associated capacity state.
 
 ### HTTP
 
-The handler first enforces transport limits, strict JSON decoding, and the
+The handler enforces transport limits and strict JSON decoding before mapping
-minimal request shape. It maps DTO values to public types without deciding
+DTOs into `promptkit.RunRequest`, `promptkit.ArtifactRef`, and
-prompt selection, source behavior, or validation semantics. On success it maps
+`promptkit.ExecutionTargetOverride`. On success it reads Promptkit artifact,
-the public result to the response DTO; on failure it uses `errors.Is` over
+validation, model, usage, and metadata values directly.
-public framework errors and HTTP-local artifact-policy errors to choose the
+The optional HTTP retry count maps to `RunRequest.TransientRetries` without
-public error mapping.
+mutating the shared engine. Negative values are rejected before invocation;
+Promptkit controls retries and backend admission for concurrent requests.
 
-The [HTTP API reference](../api.md) owns the route, DTO schema, status codes,
+Failure mapping uses `errors.Is` against Promptkit's public sentinels and the
-and externally observable limit behavior.
+HTTP reader's Scriptorium-owned containment and size errors. Wrapped reader
+errors preserve their identity through Promptkit's artifact-load boundary.
 
-### Public Go Facade
+The report collector is per invocation. It ignores nonterminal events and
-
+copies terminal aggregates once, including usage presence and completeness.
-`NewEngine` applies public options, selects filesystem, `fs.FS`, single-file,
+It retains no history or shared state; adapters decide whether to attach it and
-or in-memory dependencies, and constructs a runner. The conversion functions
+how to present its snapshot.
-copy maps and slices across the boundary so callers do not receive internal
+CLI `run` attaches one only when a report path is selected, writes generated
-domain values. The facade maps selected internal errors to the public sentinel
+output first on success, and then writes the terminal snapshot when present.
-set and keeps direct request API keys out of public results.
+Its report path remains untouched for pre-invocation failures or absent
+terminal observations; report and artifact writes are independent.
+HTTP `POST /v1/runs` attaches a separate collector to each invocation only when
+`include_execution_report` is true. Its optional top-level `execution` field
+appears in success or error envelopes only when Promptkit emits a terminal
+event. Pre-invocation adapter errors and absent terminal events leave it out.
+The complete serialized success or report-bearing error response is subject to
+the configured response-size limit; overflow returns the compact 413 error
+without a report. Field meanings are owned by the [API contract](../api.md#execution-report).
 
 ## Package-Local Guarantees
 
-- Adapters do not embed framework orchestration or source-loading decisions.
+- Adapters contain no copied framework types or orchestration.
-- Configuration is resolved before adapter dependency composition.
+- Configuration is resolved before Promptkit engine construction.
-- CLI and HTTP consume the public engine without a repairer; a repairer remains
+- Explicit numeric overrides preserve presence, including zero.
-  available only through explicit internal runner construction.
+- HTTP DTO and error mapping remains stable and transport-owned.
-- DTO conversion preserves explicit numeric-override presence.
+- Resolved secrets are not serialized or printed.
-- Error mapping matches error identities, not error text.
+- No adapter creates durable run state.
-- No adapter creates durable run state; caller-selected output files are not
-  application state.
 
-## Failure And Verification Boundaries
+## Verification
 
-Keep external error payloads concise, preserve strict external decoding, and do
+Inspect:
-not serialize resolved secret values. Validation content failures remain result
-state; runtime failures remain errors for the relevant adapter to map.
-
-Inspect focused tests when changing this area:
 
 - `internal/adapter/cli/run_test.go`
 - `internal/adapter/http/handler_test.go`
-- `engine_test.go`
+- `internal/adapter/http/artifact_reader_test.go`
 - `internal/format/prepared_run_test.go`
+- `internal/adapter/dependency_test.go`
 
-Run the affected adapter package tests and recheck the relevant canonical
+The adapter tests protect parsing, configuration mapping, output, status
-contract. The [testing policy](../policy/testing.md) owns global test
+mapping, restricted artifacts, and representative real Promptkit-engine
-sufficiency guidance.
+workflows. The dependency test protects the repository boundary.
 
 ## Change Recipes
 
-### Application Configuration Fields
+For a CLI or HTTP change:
 
-1. Add the field to the relevant `internal/config` shape and default handling.
+1. identify the Scriptorium-owned external contract;
-2. Parse and validate it, then preserve configuration and CLI-override
+2. map through Promptkit public values without copying framework semantics;
-   precedence while wiring it through its consuming adapter.
+3. add or update the narrow application-owned test;
-3. Add focused configuration and adapter tests for parsing, mapping, and
+4. update the canonical Scriptorium contract; and
-   effective behavior.
+5. coordinate and tag Promptkit first if a required public capability is
-4. Update the [configuration contract](../config.md) and any affected external
+   genuinely absent.
-   contract.
 
-### CLI Flags
+Update [source internals](sources.md) when application source locations or HTTP
-
+artifact containment changes.
-1. Add the flag to the relevant parser in `internal/adapter/cli/run.go`.
-2. Keep command scope and application-configuration precedence intentional.
-3. Add or update parser and command tests in
-   `internal/adapter/cli/run_test.go`.
-4. Update the [CLI contract](../cli.md) and affected maintained examples.
-
-### Adapter Capabilities
-
-1. Define or reuse an adapter-local consumer interface with public facade
-   types when a test seam is needed.
-2. Implement translation and IO behavior without moving framework decisions out
-   of the public engine.
-3. Add focused mapping, parsing, and error-behavior tests.
-4. Update this document and the affected public or integration contract. Update
-   [source internals](sources.md) when source-loading behavior changes.

docs/internal/llm.md

@@ -1,86 +0,0 @@
-# LLM Internals
-
-## Purpose
-
-`internal/llm` defines the provider-neutral `Client` interface and the
-OpenAI-compatible client implementation. The [OpenAI-compatible integration
-contract](../integrations/openai-compatible-chat.md) owns the outbound HTTP wire
-format and protocol behavior.
-
-## Construction
-
-`NewOpenAICompatibleClient` validates a non-empty configured base URL, records
-an optional default model, and resolves one transport cap. A supplied client
-with a positive timeout supplies that cap; otherwise a positive configured
-timeout is used, then the internal default.
-
-When callers supply an `http.Client`, construction clones it rather than
-mutating the caller's instance. A supplied client with a zero or negative
-timeout receives the resolved transport cap in the clone. The client stores the
-trimmed base URL, default model, and cloned client.
-
-## Generate Flow
-
-`Generate` receives a `domain.GenerateRequest` from the runner:
-
-1. validate the effective timeout and choose the request endpoint;
-2. map the domain request to the internal wire-request representation;
-3. validate and flatten extra parameters and encode JSON;
-4. derive a child context when the effective generation timeout is positive,
-   then create the HTTP request with that context;
-5. prefer a direct API key, otherwise resolve the configured key environment
-   variable;
-6. execute with the construction-time HTTP client, reject non-success status
-   responses without returning
-   provider response bodies; and
-7. decode the response subset into `domain.GenerateResponse`.
-
-`openAIChatRequestFromGenerateRequest` is the conversion boundary for effective
-model defaults, explicit numeric-presence state, rendered messages, structured
-output, and session-ID validation. `openAIChatRequestPayload` protects reserved
-fields and JSON encoding before an HTTP call. The external payload shape is
-defined only in the [integration contract](../integrations/openai-compatible-chat.md).
-
-## Error Categories
-
-The package uses these internal sentinels:
-
-- `ErrInvalidConfig` for invalid client construction;
-- `ErrInvalidRequest` for invalid effective generation input;
-- `ErrRequestFailed` for request construction or transport failures;
-- `ErrUnexpectedStatus` for non-success HTTP responses; and
-- `ErrMalformedResponse` for invalid or incomplete successful-response data.
-
-The runner maps an invalid LLM request to its invalid-request category and
-other LLM failures to its generation category. Adapters then apply their public
-error contracts.
-
-## Package-Local Guarantees
-
-- The default-model fallback happens before wire encoding.
-- Per-generation timeout handling derives a request context; it never replaces
-  or mutates the configured HTTP client's transport cap.
-- Direct API keys take precedence over environment lookup within this client.
-- Provider response bodies are discarded for non-success status responses.
-- The client does not implement retries, tool calls, or a stateful session
-  store.
-
-## Verification And Change Recipe
-
-Inspect:
-
-- `internal/llm/openai_compatible_client_test.go`
-- `internal/usecase/runner_test.go`
-- `internal/adapter/http/handler_test.go`
-
-When changing the client:
-
-1. keep domain-to-wire mapping inside `internal/llm` and preserve the `Client`
-   interface;
-2. test construction, timeout selection, mapping, and error categorization;
-3. update the [OpenAI-compatible integration contract](../integrations/openai-compatible-chat.md)
-   for any observable wire or protocol change; and
-4. update [runner internals](runner.md) if the client boundary or structured
-   output handoff changes.
-
-The [testing policy](../policy/testing.md) owns global test sufficiency.

docs/internal/overview.md

@@ -1,48 +1,19 @@
 # Internal Component Overview
 
-## Purpose
+This is the complete inventory of Scriptorium's implemented Go components.
-
+The [architecture policy](../policy/architecture.md) owns normative boundaries;
-This is the inventory of Scriptorium's implemented components for contributors.
+public behavior belongs in the linked contracts.
-The [architecture policy](../policy/architecture.md) owns normative boundaries
-and invariants; public behavior belongs in the linked contracts.
-
-## Public And Command Entrypoints
 
 | Component | Implemented responsibility | References |
 | --- | --- | --- |
-| Root package `scriptorium` | Public Go facade that constructs the engine, exposes request/result types and options, and maps internal errors. | [Go package contract](../consumers/pkg-scriptorium.md), [adapter internals](adapters.md) |
+| `cmd/scriptorium` | Process entrypoint that delegates arguments and streams to the CLI adapter. | [CLI contract](../cli.md), [adapter internals](adapters.md) |
-| `cmd/scriptorium` | Process entrypoint that delegates command execution to the CLI adapter. | [CLI contract](../cli.md), [adapter internals](adapters.md) |
+| `internal/adapter/cli` | Parses execution and application-configuration inspection commands, resolves settings, constructs Promptkit engines only for execution/definition inspection, maps requests, and owns process output and exit behavior. | [CLI contract](../cli.md), [adapter internals](adapters.md) |
+| `internal/adapter/http` | Owns routes, DTOs, strict decoding, limits, Promptkit request/result mapping, public error mapping, and restricted HTTP artifact reading. | [HTTP API](../api.md), [adapter internals](adapters.md), [source internals](sources.md) |
+| `internal/config` | Selects application sources, supplies the ConfigKit definition and explicit overrides, and converts resolved settings for runtime use. | [configuration contract](../config.md), [adapter internals](adapters.md) |
+| `internal/defaults` | Holds Scriptorium-owned application and HTTP defaults. | [configuration contract](../config.md) |
+| `internal/format` | Formats Promptkit prepared-run and prompt/profile inspection values for CLI text or JSON output. | [CLI contract](../cli.md), [adapter internals](adapters.md) |
+| `internal/report` | Projects one terminal Promptkit observation into Scriptorium-owned execution metadata. | [adapter internals](adapters.md) |
 
-## Adapters, Domain, And Use Case
+Framework implementation packages are provided by
-
+[Promptkit v0.11.0](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md)
-| Component | Implemented responsibility | References |
+and are not part of this repository.
-| --- | --- | --- |
-| `internal/adapter/cli` | Parses CLI commands, constructs the public engine from application settings, and handles process input and output. | [CLI contract](../cli.md), [adapter internals](adapters.md) |
-| `internal/adapter/http` | Maps HTTP requests and responses through public engine values, maps public errors, and owns restricted HTTP artifact policy. | [HTTP API contract](../api.md), [adapter internals](adapters.md) |
-| `internal/domain` | Defines core request, result, output-contract, and LLM-boundary types. | [runner internals](runner.md) |
-| `internal/usecase` | Implements `Runner` preparation, execution, validation coordination, and the repairer boundary. | [runner internals](runner.md) |
-
-## Configuration And Sources
-
-| Component | Implemented responsibility | References |
-| --- | --- | --- |
-| `internal/config` | Loads application settings, applies defaults, and applies CLI overrides. | [configuration contract](../config.md), [adapter internals](adapters.md) |
-| `internal/defaults` | Holds compile-time default values used when application settings are resolved. | [configuration contract](../config.md) |
-| `internal/promptdef` | Loads prompt definitions from filesystem and `fs.FS` sources. | [configuration contract](../config.md), [source internals](sources.md) |
-| `internal/profile` | Loads filesystem and `fs.FS` execution profiles and combines profile repositories. | [configuration contract](../config.md), [source internals](sources.md) |
-| `internal/profile/builtin` | Provides embedded built-in execution profiles as a repository. | [configuration contract](../config.md), [source internals](sources.md) |
-| `internal/filecatalog` | Provides shared YAML discovery and source-root helpers. | [source internals](sources.md) |
-| `internal/artifact` | Provides the framework's ordinary inline and unrestricted file artifact reader. | [configuration contract](../config.md), [source internals](sources.md) |
-| `internal/prompt` | Renders prompt templates into messages. | [runner internals](runner.md) |
-
-## Formatting, Validation, And Model Access
-
-| Component | Implemented responsibility | References |
-| --- | --- | --- |
-| `internal/format` | Formats public prepared-run information for CLI output. | [CLI contract](../cli.md), [adapter internals](adapters.md) |
-| `internal/validate` | Defines validation interfaces and provides standard filesystem and `fs.FS` schema validation. | [configuration contract](../config.md), [source internals](sources.md), [runner internals](runner.md) |
-| `internal/llm` | Defines the provider-neutral LLM client boundary and its OpenAI-compatible implementation. | [OpenAI-compatible integration](../integrations/openai-compatible-chat.md), [LLM internals](llm.md), [runner internals](runner.md) |
-
-Focused internal documents describe the components that have detailed
-orchestration, adapter, or source behavior. Package tests live alongside the
-implementation and are identified in those focused documents where relevant.

docs/internal/runner.md

@@ -1,120 +0,0 @@
-# Runner Internals
-
-## Purpose
-
-`internal/usecase.Runner` is the prompt-execution orchestrator. It prepares
-domain requests, invokes an injected LLM client, validates output, and returns
-domain results. Transport parsing, response mapping, and public type conversion
-remain outside this package.
-
-The [configuration reference](../config.md) owns prompt, profile, schema, and
-runtime-setting definitions. Public error behavior is defined by the
-[HTTP API](../api.md) and [Go package](../consumers/pkg-scriptorium.md)
-contracts.
-
-## Dependencies And Construction
-
-`Runner` receives these collaborators:
-
-- `promptdef.Repository`;
-- `profile.Repository`;
-- `artifact.Reader`;
-- `prompt.Renderer`;
-- `llm.Client`;
-- `validate.Validator`; and
-- an optional `OutputRepairer`.
-
-`NewRunner` constructs a runner without a repairer. `NewRunnerWithRepairer`
-accepts one explicitly. The public engine chooses concrete repositories and
-readers; executable adapters reach the runner only through that engine. The
-runner does not load application configuration.
-
-## Prepare Flow
-
-`Prepare` performs one deterministic preparation pass for a request:
-
-1. validate the prompt ID and load the prompt definition;
-2. hash the definition and select the explicit or default profile;
-3. load the profile and resolve effective execution settings;
-4. validate endpoint, model, and credential availability;
-5. resolve the output contract and, for JSON Schema output, load a structured
-   schema document before model execution;
-6. read and hash input artifacts;
-7. render messages and the session ID; and
-8. return a `PreparedRun` containing the effective state and rendered-prompt
-   hash.
-
-Execution settings merge defaults, profile values, and a request override.
-Numeric override presence is retained so explicit zero values are not confused
-with omissions.
-
-## Run And Validation Flow
-
-`Run` creates a run ID and timestamps, then calls `Prepare` rather than
-duplicating preparation. It sends the prepared prompt, effective target,
-target-presence state, and optional structured-output specification to the LLM
-client. It converts the returned content to an output artifact, validates it,
-and returns the artifact, validation, hashes, usage, and timing metadata.
-
-A validator can return a content result or an operational error. Content
-failures stay in the result; schema loading, compilation, and validator
-operational failures are returned as `ErrValidation`. The canonical distinction
-for callers is documented by the public contracts.
-
-## Repair Boundary
-
-Repair is an internal optional loop. It starts only when a repairer is present,
-the output contract permits one or more attempts, validation failed, and the
-validation mode is JSON or JSON Schema. Each repair receives the previous
-output, validation errors, effective target, structured-output specification,
-and attempt metadata; every repaired result is validated again.
-
-`NewDefaultOutputRepairer` delegates to the injected LLM client. The public
-engine, and therefore CLI and HTTP, uses `NewRunner` and does not inject this
-repairer.
-
-## Error Translation
-
-Runner sentinels identify failure categories for adapters:
-
-- `ErrInvalidRequest`
-- `ErrProfileRequired`
-- `ErrAPIKeyEnvMissing` and `ErrAPIKeyRequired`
-- `ErrPromptLoad`, `ErrProfileLoad`, and `ErrArtifactLoad`
-- `ErrPromptRender`
-- `ErrLLMGenerate`
-- `ErrValidation`
-
-Wrap errors with those sentinels and preserve their identities through
-`errors.Is`; adapters must not classify errors by message text. The runner
-passes direct keys only to the LLM boundary and never includes resolved key
-values in prepared or run results.
-
-## Package-Local Guarantees
-
-- `Run` always reuses `Prepare`.
-- Schema documents are loaded before the initial LLM call when structured output
-  is required.
-- Output validation records attempts used, including repair attempts.
-- Runner state is per request; the package does not create a durable run store
-  or manifest.
-- Source, renderer, validator, and LLM implementations remain injected
-  boundaries.
-
-## Verification And Change Recipe
-
-Inspect:
-
-- `internal/usecase/runner_test.go`
-- `engine_test.go`
-
-When changing orchestration:
-
-1. identify the collaborator boundary and the affected `Prepare` or `Run` state;
-2. preserve the `Run`-through-`Prepare` path and error identity;
-3. add focused runner or integration tests for changed state transitions,
-   validation, or repair behavior; and
-4. update the owning external contract and any affected source or LLM internal
-   document.
-
-The [testing policy](../policy/testing.md) owns global test sufficiency.

docs/internal/sources.md

@@ -2,98 +2,100 @@
 
 ## Purpose
 
-This document describes how source packages load prompt definitions, profiles,
+This document covers Scriptorium-owned source locations and the restricted HTTP
-schemas, and artifacts. The [configuration reference](../config.md) owns their
+artifact reader. Prompt, profile, schema, and ordinary artifact semantics are
-user-facing formats and settings. The [HTTP API reference](../api.md) owns
+owned by the tagged
-HTTP-visible artifact outcomes; [operations](../operations.md) owns deployment
+[Promptkit format reference](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md).
-handling.
 
-## Prompt Definitions
+## Application Source Locations
 
-`internal/promptdef` provides filesystem and `fs.FS` repositories. Both use
+`internal/config` resolves `prompt_dir`, `profile_dir`, and `schema_dir` from
-`internal/filecatalog` for recursive YAML discovery, deterministic ordering,
+Scriptorium defaults, configuration files, and CLI overrides. It also resolves
-display paths, and root cleaning.
+the application-owned `backends` mapping into sorted engine settings.
+`internal/adapter/cli` passes the directories into `promptkit.Config` and maps
+each configured backend to Promptkit's public engine registration when
+constructing an engine shared by the command path.
 
-Repositories select a prompt by YAML ID and optional version rather than by
+Scriptorium does not search, parse, validate, or overlay framework source files
-path. They decode through strict YAML handling, reject duplicate matching
+itself. Promptkit owns prompt selection, profile built-ins and overlays, schema
-definitions, and resolve `content_file` relative to the definition. The `fs.FS`
+resolution, ordinary file artifacts, and the related error identities.
-implementation resolves content paths inside its source root; absolute paths and
-traversal outside that root are rejected before file access.
 
-## Profiles And Built-Ins
+The [configuration reference](../config.md) owns Scriptorium's source-location
+fields and precedence. Maintained files under `examples/` are application
+inputs that use Promptkit's tagged formats.
 
-`internal/profile` provides filesystem, `fs.FS`, and overlay repositories.
+## Application Configuration Boundary
-`internal/profile/builtin` exposes embedded assets through the same repository
-interface.
 
-An overlay asks its primary source first. It falls back only when the primary
+`internal/config` contains a ConfigKit-native `Document` definition. Its
-reports `ErrProfileNotFound`; invalid YAML, duplicate IDs, validation failures,
+fresh defaults come from Scriptorium's existing default constants; its resolver
-and raw-key failures are returned rather than hidden by fallback. This makes a
+records only actual trimming, path cleaning, and render-format normalization.
-custom ID override a built-in ID while retaining errors in the custom source.
+The validator reports application retry, size-limit, and format errors without
+mutating the document or exposing rejected values. Application path values keep
+working-directory-relative meaning. ConfigKit owns strict YAML decoding and
+presence semantics, including dynamic integer values in backend parameters.
 
-The public engine can overlay in-memory profiles ahead of both file-backed and
+The `Load` boundary selects an explicit file, the first existing implicit
-built-in repositories. Profile field definitions, validation ranges, and the
+configuration file, or ConfigKit's defaults-only source. Only absence advances
-built-in catalog remain in the [configuration reference](../config.md).
+implicit discovery. One ConfigKit load applies explicit application overrides
+before validation and returns a result containing the resolved document and
+its frozen inspection records. `Settings` converts that document into the
+existing runtime settings with backend IDs sorted; it does not read files or
+apply another merge. File-backed loads enable explicit ConfigKit imports and
+select one named overlay when requested. ConfigKit uses the selected file's
+canonical directory as the source root; the application does not widen it.
+Application path values retain process-working-directory-relative meaning.
 
-## Schemas
+Every configuration-loading command uses this boundary. The CLI maps only
+explicitly visited application flags to ConfigKit overrides and prints
+structured load diagnostics before engine construction. The old application
+YAML decoder and merge path have been removed.
+Application `config` inspection reuses the result's frozen effective,
+provenance, and history views without constructing an engine or reloading
+sources. It does not resolve API-key environment values; ordinary backend
+parameters remain visible by the selected inspection policy.
 
-`internal/validate` supplies `StandardValidator` for filesystem sources and
+## Restricted HTTP Artifact Reader
-`FSValidator` for `fs.FS` sources. Directory-backed validation loads the named
-schema path; it does not search directories by basename. `fs.FS` schema paths
-are cleaned and checked against their configured root, while a single-file
-source matches its file base name.
 
-The runner requests a schema document before generation when it needs
+`internal/adapter/http` implements `promptkit.ArtifactReader` for HTTP
-structured output. JSON and schema mismatches in generated content are
+requests. The `serve` path injects it with
-validation results; source access, decoding, registration, and compilation
+`promptkit.WithArtifactReader`, replacing Promptkit's ordinary reader for
-failures are operational errors.
+inbound HTTP inputs.
 
-## Artifacts
+The reader:
 
-`internal/artifact` owns the framework's ordinary inline and unrestricted file
+- accepts inline references without an artifact root;
-reader. The public engine uses it by default and permits consumers to replace it
+- denies file references when no root is configured;
-for every input through the public `ArtifactReader` extension. The
+- resolves relative paths below the configured root;
-HTTP adapter owns its restricted reader for HTTP containment: `serve` injects
+- accepts absolute paths only when they are lexically within that root;
-that reader into the public engine with `WithArtifactReader`.
+- rejects lexical traversal outside the root;
+- applies the configured file byte limit, with zero meaning unlimited;
+- preserves content type, body, size, hash, name, and URI metadata; and
+- honors context cancellation.
 
-The rooted reader cleans paths and applies lexical containment without resolving
+Containment is lexical and does not resolve symlinks. The operating system
-symlinks. It checks relative references against the configured root and accepts
+follows symlinks after the check. The [HTTP API](../api.md) owns observable
-absolute references only when they remain inside that lexical root. The OS still
+request outcomes, and [operations](../operations.md) owns safe deployment
-follows symlinks after that check. The public containment outcome is documented
+permissions and root selection.
-by the [HTTP API reference](../api.md); deployment permissions belong in
-[operations](../operations.md).
 
-## Failure Boundaries
+Reader errors remain identifiable after Promptkit wraps them as artifact-load
-
+failures, allowing the HTTP adapter to preserve Scriptorium status and error
-Source packages report repository, decoding, duplicate, validation, and read
+codes.
-failures to their callers. They do not select public status codes or response
-schemas. The runner categorizes source failures and the public engine preserves
-the corresponding public error identities; adapters map those identities to
-their own external contract.
-
-Source reads use current filesystem or `fs.FS` content for each request. These
-packages create no manifests, checkpoints, or durable run state.
 
 ## Verification And Change Recipe
 
 Inspect:
 
-- `internal/promptdef/repository_test.go`
+- `internal/config/document_test.go`
-- `internal/profile/repository_test.go`
+- `internal/config/load_test.go`
-- `internal/profile/builtin/repository_test.go`
+- `internal/adapter/cli/run_test.go`
-- `internal/artifact/reader_test.go`
 - `internal/adapter/http/artifact_reader_test.go`
-- `internal/validate/standard_validator_test.go`
+- `internal/adapter/http/handler_test.go`
-- `engine_test.go`
 
-When updating prompt, profile, schema, or built-in assets:
+When changing an application source location or HTTP artifact policy:
 
-1. keep assets valid for the strict loader and the relevant source boundary;
+1. preserve strict configuration precedence and the Promptkit public boundary;
-2. update the [configuration reference](../config.md) when a file-format,
+2. keep containment and size policy in Scriptorium;
-   catalog, or default changes;
+3. update focused configuration, reader, and handler tests;
-3. run focused source and integration tests, including the built-in repository
+4. update the [configuration](../config.md), [HTTP](../api.md), and
-   test when embedded assets change; and
+   [operations](../operations.md) contracts as applicable; and
-4. update this document when discovery, precedence, containment, or failure
+5. do not duplicate Promptkit loaders, formats, or ordinary artifact behavior.
-   mechanics change.
-
-The [testing policy](../policy/testing.md) owns global test sufficiency.

docs/operations.md

@@ -7,8 +7,11 @@ recovery for Scriptorium. It does not redefine invocation syntax, configuration
 fields, or HTTP wire behavior.
 
 - [CLI reference](cli.md): commands, output destinations, and exit codes.
-- [Configuration reference](config.md): configuration, prompt/profile/schema
+- [Configuration reference](config.md): application settings, source
-  formats, defaults, and credentials.
+  locations, defaults, and credential mapping.
+- [Promptkit framework formats](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md):
+  prompt, profile, schema, execution-setting, and framework credential
+  contracts.
 - [HTTP API reference](api.md): route, request/response schema, status codes,
   limits, and HTTP artifact access.
 - [Consumer integration overview](consumers/api.md): caller responsibilities.
@@ -23,13 +26,38 @@ configuration, or environment and submitting a new request.
 Generated artifacts, rendered prompts, model output, and run metadata are
 caller-owned data. Retention, encryption, backup, and deletion are deployment
 responsibilities.
+Optional [CLI execution reports](cli.md) also belong to the caller. They can
+contain sensitive identifiers even though they omit prompt and response bodies.
+Keep report paths separate from generated output and apply the same access and
+retention controls. Output and report writes are not transactional; an older
+report may remain when no terminal observation was produced.
+HTTP callers may also request a [terminal execution report](api.md#execution-report).
+It shares the same identifier sensitivity and should receive response access
+and retention controls. An opted-in report increases the encoded response size;
+an oversized success or report-bearing error becomes the compact 413 response
+without a report.
 
 ## Deploy The Filesystem And Process
 
-Provide the process with readable prompt, profile, and schema sources. Keep
+Provide the process with readable configured Promptkit prompt, profile, and
-prompt templates adjacent to the prompt definitions that reference them. For an
+schema sources that follow the tagged framework formats. For an HTTP deployment
-HTTP deployment that accepts file artifacts, use a dedicated, narrow artifact
+that accepts file artifacts, use a dedicated, narrow artifact directory rather
-directory rather than a general-purpose or sensitive filesystem tree.
+than a general-purpose or sensitive filesystem tree.
+
+If application configuration uses explicit imports or a selected overlay,
+deploy those files beneath the selected configuration file's canonical
+directory. ConfigKit keeps imported and overlay files within that root;
+Scriptorium does not widen it. Application path values inside those files still
+resolve from the process working directory, so set that directory deliberately
+in the service manager. This configuration-source boundary is distinct from
+the HTTP artifact root and does not constrain prompt or schema directories.
+
+When upgrading existing definitions, review selected profile IDs.
+`deepseek-3-2`, `deepseek-4-flash`, and `deepseek-4-pro` were removed from the
+selected catalog. Choose an available catalog profile, one of Promptkit's
+maintained names, or a complete application-owned profile. New DeepSeek names
+are not aliases for the removed ones; see the
+[v0.10 migration guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.10.0/docs/releases/v0.10.0.md).
 
 Run Scriptorium under an identity that can:
 
@@ -59,14 +87,26 @@ and apply the same retention and access rules as for model input and output.
 
 Before changing production inputs, profiles, or schemas:
 
-1. confirm the deployed configuration selects the intended sources and model
+1. use `config validate`, `config show`, or `config sources` to check the
+   application configuration and its selected sources without constructing an
+   engine; this does not verify prompt files, provider access, or credentials;
+2. confirm the deployed configuration selects the intended sources and model
    credentials;
-2. use [`render`](cli.md) with the same request inputs and variables to confirm
+3. use [`render`](cli.md) with the same request inputs and variables to confirm
    preparation without a model call;
-3. use [`run`](cli.md) for generation; and
+4. use [`run`](cli.md) for generation; and
-4. retain or discard validation-failed output according to the caller's
+5. retain or discard validation-failed output according to the caller's
    policy.
 
+Inspection output can include configuration paths, names, and ordinary backend
+parameters. `config explain --path` uses JSON Pointer paths and can show
+displaced historical values as well as the final value. Protect both the
+selected paths and the output, especially when backend parameters contain
+sensitive identifiers; ConfigKit does not infer arbitrary secrets in those
+parameters. Apply
+access and retention controls; the application stores only API-key environment
+reference names, not the resolved credential bytes.
+
 The [maintained render script](../examples/render-markdown-summary.sh) is a
 copyable preflight example. The CLI reference owns its complete invocation and
 exit semantics.
@@ -91,6 +131,38 @@ protect request bodies, HTTP file artifacts, and encoded responses; configure
 them through the [configuration reference](config.md) and rely on the
 [HTTP API reference](api.md) for their response effects.
 
+Configured backend concurrency and queue capacity are enforced per constructed
+Promptkit engine. A `serve` process constructs one engine for its handler, so
+concurrent HTTP requests share that transient admission state. Scriptorium does
+not retain workflow state: capacity is neither durable nor a queue of resumable
+runs. When admission is exhausted, HTTP returns `503 capacity_exceeded` without
+retry timing; callers choose any retry policy that is safe for another model
+call.
+
+Promptkit's built-in client now allows two additional attempts for eligible
+transient provider statuses by default. Account for added calls, latency, and
+cost when planning capacity. Each repair generation has its own transient
+budget, separate from the structural repair count. Configure the engine budget
+with [`transient_retries`](config.md); `run` and `render` accept a request
+override described in the [CLI contract](cli.md), and HTTP callers can select
+one through the [API contract](api.md). Omission inherits the engine
+setting and then Promptkit's default, while explicit zero disables additional
+attempts. Existing generation timeouts apply
+per attempt, while the caller context covers the complete operation. Provider
+`Retry-After` timing can exceed Promptkit's ordinary backoff cap; consult the
+[outbound integration contract](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/integrations/openai-compatible-chat.md)
+for details.
+
+CLI `run` can set a [whole-run deadline](cli.md) when total execution time must
+be bounded. The existing generation timeout applies afresh to each attempt and
+does not cap retry waits or the complete invocation. The whole-run interval
+covers the engine call, including capacity waiting and repairs as supported by
+context cancellation; it excludes parsing, engine setup, and output writes.
+HTTP callers can use [`run_timeout_seconds`](api.md) to shorten their request
+context for the same engine interval. The API distinguishes an expired
+execution deadline from caller cancellation and from a provider-attempt
+timeout. A canceled capacity waiter releases its Promptkit admission state.
+
 Before increasing a limit:
 
 1. measure representative input, generated-output, and optional raw-output

docs/oss/attribution.md

@@ -0,0 +1,127 @@
+# Open-Source Attribution
+
+Scriptorium's own terms are in the repository [LICENSE](../../LICENSE).
+The [OSS policy](../policy/oss.md) governs these entries. Dependency versions
+are recorded in [go.mod](../../go.mod) and [go.sum](../../go.sum); source and
+notice links below identify the exact commits for the selected versions.
+
+## Promptkit
+
+Copyright (C) 2026 Eric Rakestraw
+
+SPDX-License-Identifier: LGPL-3.0-or-later
+
+License and notices: [LGPL v3](licenses/LGPL-3.0.txt) |
+[GPL v3 companion](licenses/GPL-3.0.txt) |
+[upstream LICENSE](https://gitea.maximumdirect.net/eric/promptkit/src/commit/db05b56166ca2d8650dfaf660e1cf0eed3932e1d/LICENSE)
+
+Source: [Promptkit v0.11.0](https://gitea.maximumdirect.net/eric/promptkit/src/commit/db05b56166ca2d8650dfaf660e1cf0eed3932e1d)
+
+## ConfigKit
+
+Upstream copyright statement: no project-specific statement is present in the
+selected module; the FSF copyright in its license text belongs to that license
+document and is not substituted for a project notice.
+
+SPDX-License-Identifier: LGPL-3.0-only
+
+License and notices: [LGPL v3](licenses/LGPL-3.0.txt) |
+[GPL v3 companion](licenses/GPL-3.0.txt) |
+[upstream LICENSE](https://gitea.maximumdirect.net/eric/ConfigKit/src/commit/e6ced0d3d1194b58e0b3dc8970089471ba175258/LICENSE)
+
+Source: [ConfigKit v0.4.0](https://gitea.maximumdirect.net/eric/ConfigKit/src/commit/e6ced0d3d1194b58e0b3dc8970089471ba175258)
+
+## Promptkit OpenRouter Catalog
+
+Upstream copyright statement: no project-specific statement is present in the
+selected module. The linked upstream README records the profile assets'
+Promptkit origin and the copyright holder's deliberate relicensing.
+
+SPDX-License-Identifier: LGPL-3.0-only
+
+License and notices: [LGPL v3](licenses/LGPL-3.0.txt) |
+[GPL v3 companion](licenses/GPL-3.0.txt) |
+[upstream LICENSE](https://gitea.maximumdirect.net/eric/promptkit-backend-openrouter/src/commit/f7518043ebdd70b8959506201639903dff0b85ab/LICENSE) |
+[asset licensing notice](https://gitea.maximumdirect.net/eric/promptkit-backend-openrouter/src/commit/f7518043ebdd70b8959506201639903dff0b85ab/README.md)
+
+Source: [OpenRouter catalog v2.20260922.1](https://gitea.maximumdirect.net/eric/promptkit-backend-openrouter/src/commit/f7518043ebdd70b8959506201639903dff0b85ab)
+
+## Promptkit Rakestrawhome Catalog
+
+Upstream copyright statement: no project-specific statement is present in the
+selected module. The linked upstream README records the profile asset's
+Promptkit origin and the copyright holder's deliberate relicensing.
+
+SPDX-License-Identifier: LGPL-3.0-only
+
+License and notices: [LGPL v3](licenses/LGPL-3.0.txt) |
+[GPL v3 companion](licenses/GPL-3.0.txt) |
+[upstream LICENSE](https://gitea.maximumdirect.net/eric/promptkit-backend-rakestrawhome/src/commit/d664696142bf7c2d93db2a6b2e07f3deb55f2226/LICENSE) |
+[asset licensing notice](https://gitea.maximumdirect.net/eric/promptkit-backend-rakestrawhome/src/commit/d664696142bf7c2d93db2a6b2e07f3deb55f2226/README.md)
+
+Source: [Rakestrawhome catalog v2.20260922.0](https://gitea.maximumdirect.net/eric/promptkit-backend-rakestrawhome/src/commit/d664696142bf7c2d93db2a6b2e07f3deb55f2226)
+
+## jsonschema/v6
+
+Upstream copyright statement: no project-specific statement is present in the
+selected module; no substitute statement is inferred here.
+
+SPDX-License-Identifier: Apache-2.0
+
+License and notices: [Apache 2.0](licenses/Apache-2.0.txt) |
+[upstream LICENSE](https://github.com/santhosh-tekuri/jsonschema/blob/29cbed948d24a04700eb94436416b18a07953b71/LICENSE)
+
+Source: [jsonschema/v6 v6.0.2](https://github.com/santhosh-tekuri/jsonschema/tree/29cbed948d24a04700eb94436416b18a07953b71)
+
+## golang.org/x/text
+
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+SPDX-License-Identifier: BSD-3-Clause
+
+License and notices: [BSD 3-Clause](licenses/BSD-3-Clause.txt) |
+[upstream LICENSE](https://go.googlesource.com/text/+/6c97a165dd661335ff7bce6104a008558123c353/LICENSE)
+
+Source: [golang.org/x/text v0.14.0](https://go.googlesource.com/text/+/6c97a165dd661335ff7bce6104a008558123c353)
+
+## gopkg.in/yaml.v3
+
+Copyright (c) 2006-2010 Kirill Simonov
+
+Copyright (c) 2006-2011 Kirill Simonov
+
+Copyright (c) 2011-2019 Canonical Ltd
+
+Copyright 2011-2016 Canonical Ltd.
+
+SPDX-License-Identifier: MIT AND Apache-2.0
+
+The upstream LICENSE assigns MIT to files ported from libyaml and Apache 2.0
+to the remaining files; these are file-specific terms, not alternatives.
+
+License and notices: [MIT](licenses/MIT.txt) |
+[Apache 2.0](licenses/Apache-2.0.txt) |
+[upstream LICENSE](https://github.com/go-yaml/yaml/blob/f6f7691b1fdeb513f56608cd2c32c51f8194bf51/LICENSE) |
+[upstream NOTICE](https://github.com/go-yaml/yaml/blob/f6f7691b1fdeb513f56608cd2c32c51f8194bf51/NOTICE)
+
+Source: [gopkg.in/yaml.v3 v3.0.1](https://github.com/go-yaml/yaml/tree/f6f7691b1fdeb513f56608cd2c32c51f8194bf51)
+
+## go.yaml.in/yaml/v4
+
+Copyright 2006-2010 Kirill Simonov
+
+Copyright 2011-2019 Canonical Ltd
+
+Copyright 2025 The go-yaml Project Contributors
+
+SPDX-License-Identifier: MIT AND Apache-2.0
+
+The upstream NOTICE assigns MIT to files ported from libyaml and Apache 2.0
+to the remaining files; these are file-specific terms, not alternatives.
+
+License and notices: [MIT](licenses/MIT.txt) |
+[Apache 2.0](licenses/Apache-2.0.txt) |
+[upstream LICENSE](https://github.com/yaml/go-yaml/blob/1c17b9cee72bf81ae73a8be50fbd7dd3a9985125/LICENSE) |
+[upstream NOTICE](https://github.com/yaml/go-yaml/blob/1c17b9cee72bf81ae73a8be50fbd7dd3a9985125/NOTICE)
+
+Source: [go.yaml.in/yaml/v4 v4.0.0-rc.6](https://github.com/yaml/go-yaml/tree/1c17b9cee72bf81ae73a8be50fbd7dd3a9985125)

docs/oss/licenses/Apache-2.0.txt

@@ -0,0 +1,202 @@
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docs/oss/licenses/BSD-3-Clause.txt

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+Copyright (c) <year> <owner>. 
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+
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docs/oss/licenses/GPL-3.0.txt

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
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+  "Additional permissions" are terms that supplement the terms of this
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+
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+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
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+    <program>  Copyright (C) <year>  <name of author>
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+The hypothetical commands `show w' and `show c' should show the appropriate
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+
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+
+  The GNU General Public License does not permit incorporating your program
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+may consider it more useful to permit linking proprietary applications with
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+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

docs/oss/licenses/LGPL-3.0.txt

@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
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+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
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+
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+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.

docs/oss/licenses/MIT.txt

@@ -0,0 +1,18 @@
+MIT License
+
+Copyright (c) <year> <copyright holders>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+associated documentation files (the "Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the
+following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial
+portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
+LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
+EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+USE OR OTHER DEALINGS IN THE SOFTWARE.

docs/policy/agents.md

@@ -0,0 +1,77 @@
+# Agent Policy
+
+**Base Policy Version:** 1.1
+
+**Last Updated:** 2026-09-26
+
+## Purpose
+
+Agents working in this repository must read and adhere to the following house rules.
+
+## Implementation Discipline
+
+**KEY PRINCIPLES:** Write the simplest idiomatic code that satisfies the user's
+request. Do not implicitly strengthen requirements, restrictions, or guarantees
+beyond what the user actually requested.
+
+**Keep implementation machinery proportionate.** Use straightforward,
+idiomatic code and introduce only the machinery needed to support the requested
+behavior and flexibility. Optimize for conceptual simplicity and
+maintainability, not for the fewest lines, fewest options, or narrowest product
+surface.
+
+**Do not invent restrictions.** Do not reject, prohibit, constrain, cap,
+harden, or otherwise narrow behavior unless required by the user, an explicit
+repository contract, or an unavoidable correctness constraint. Preserve
+operator and caller choice where policy has not been established. If an
+additional restriction appears advisable, present it as a decision rather than
+silently implementing it.
+
+**Do not invent guarantees.** Do not strengthen public contracts, guarantees,
+or invariants beyond those expressly requested by the user.
+
+**Use the standard library.** For example: in almost every case, the best
+approach to copying files is to use the standard library. Writing custom code to
+implement power-loss protection at the application level, or to guard against
+bad actors with privileged and concurrent access to the host's filesystem,
+is wasteful, unnecessary, and not idiomatic. Stick to the simple, standard, and
+idiomatic approach unless another path is expressly requested by the user.
+
+**An implementation detail is not repository policy.** Tests and documentation
+must not elevate incidental behavior into a durable guarantee or restriction
+unless that behavior was expressly selected as part of the contract.
+
+## Git Commit Policy
+
+By default, create a commit after completing each coherent unit of work, using a
+concise, plain-English message describing what changed. This policy is standing
+authorization to create those local commits; a separate user request is not
+required. An explicit user instruction to leave work uncommitted takes precedence.
+
+A unit of work is a focused, reviewable outcome, including its relevant tests and
+documentation. Do not commit after every intermediate edit or create empty commits.
+Complete the appropriate validation before committing. If work is incomplete or
+validation is blocked, report that state rather than presenting it as completed.
+
+Before committing:
+
+1. Run `git status --short` and review the relevant diff, including any staged
+   changes. Identify changes that predate the current unit of work.
+2. Exclude secrets, local environment files, generated junk, and unrelated changes.
+3. Stage only the files or hunks belonging to the completed unit. Use `git add .`
+   only when every included change belongs to that unit. Do not disturb unrelated
+   staged or unstaged work.
+4. Review `git diff --staged` and run appropriate checks for the change. Do not
+   repeat checks already passed for unchanged content merely to create a commit.
+5. Review `git log --oneline -n 10` and use
+   `git commit -m "<concise plain-English commit message>"`.
+6. Report the commit identifier and any remaining uncommitted work.
+
+If the unit cannot be safely separated from pre-existing work, leave it uncommitted
+and explain the overlap rather than silently including that work. If a commit
+fails, preserve the changes and report the failure; do not bypass hooks.
+
+Default commit authorization does not authorize pushing, publishing, amending,
+resetting, reverting, or rewriting history. Those actions require a separate user
+instruction. Do not use `git commit -a` or `git commit --no-verify` to bypass the
+staging and validation discipline above.

docs/policy/architecture.md

@@ -1,83 +1,157 @@
-# Architecture
+# Architecture Policy
 
-This document is the development architecture policy for Scriptorium.
+**Base Policy Version:** 1.1
 
-It is for developers and LLM coding agents. User-facing behavior belongs in `README.md` and the docs under `docs/` that target operators/users.
+**Last Updated:** 2026-09-26
+
+## Purpose And Ownership
+
+This policy defines Scriptorium's purpose, responsibility and dependency
+boundaries, established invariants, and non-goals. Concrete component inventory
+and implementation mechanics belong in [internal documentation](../internal/overview.md);
+public behavior belongs in its canonical contracts.
+
+Adopted constraints govern future development without implying that every
+capability they could govern exists or is planned. Keep proposed structure and
+implementation status in roadmaps, and decision rationale in ADRs. Acceptance
+of a decision is not proof of implementation. Do not turn incidental choices
+into architectural invariants.
 
 ## System Shape
 
-Scriptorium is a narrow prompt-execution application with three executable
+Scriptorium is an executable application with four command entry paths: CLI
-entry paths: CLI `run`, CLI `render`, and the HTTP service started by `serve`.
+`run`, CLI `render`, CLI `inspect`, and the HTTP service started by `serve`.
-It also provides a public Go package for in-process use. Executable adapters
+The `inspect` command has prompt and profile modes. Scriptorium does not expose
-consume framework behavior through that public facade; the facade continues to
+a reusable root Go package.
-compose the framework implementation inside this single repository. Its current
-component inventory is maintained in the [internal overview](../internal/overview.md).
 
-Domain behavior is centralized in `internal/usecase` and `internal/domain`.
+The application consumes
+[Promptkit v0.11.0](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md)
+through its supported root package. Promptkit owns prompt execution,
+preparation, source formats, built-in profiles, model-client behavior, and
+validation. Scriptorium owns application configuration, executable adapters,
+prepared-run and definition-inspection presentation, process behavior, and HTTP
+deployment policy.
 
-## Core Principles
+Scriptorium also consumes ConfigKit v0.4.0 for application configuration
+decoding, resolution, and validation flow. Scriptorium owns its application
+schema, defaults, normalization, validation rules, source selection, and CLI
+flag mapping; ConfigKit does not own Promptkit framework sources or HTTP
+artifact containment.
 
-- Keep orchestration narrow: Scriptorium executes one prompt request; it is not a multi-step workflow engine.
+The concrete package inventory is maintained in the
-- Keep adapter logic thin: adapters map external shapes to public engine
+[internal overview](../internal/overview.md).
-  requests/results and should not hold framework decisions.
+
-- Keep boundaries explicit: repositories/loaders/renderers/validators/LLM client stay behind package interfaces.
+As established by [ADR 0004](../adr/0004-definition-boundary.md), Scriptorium
-- Keep external decoding strict: configuration, prompt, and profile YAML and
+aims to support the complete set of features in valid Promptkit prompt and
-  HTTP JSON should reject unknown fields.
+profile definitions for its selected upstream version. Promptkit remains the
-- Keep secrets out of payloads: raw API key values must not be accepted or emitted.
+canonical parser and validator. Library-only features are considered
+individually against the simple predefined-prompt execution model.
+
+Maintain adapter boundaries with proportionate, idiomatic code. This approach
+does not require an interface for every type, additional wrappers, or a fixed
+directory tree for integrations that do not exist.
 
 ## Dependency Direction
 
-- Adapters translate external shapes and IO concerns; they do not make
+```text
-  use-case decisions.
+cmd/scriptorium
-- Executable adapters and prepared-run formatting use the public facade for
+        |
-  framework behavior rather than importing framework implementation packages
+        v
-  directly.
+CLI and HTTP adapters, configuration, defaults, and formatting
-- Use-case and domain code depend on explicit repository, renderer, validator,
+        |
-  and LLM interfaces rather than adapter implementations.
+        v
-- Source, rendering, validation, and LLM implementations remain behind their
+Promptkit (execution) and ConfigKit (application configuration)
-  package boundaries.
+```
-- Dependency-specific types must not leak across unrelated package boundaries.
-- Prefer the standard library; add an external dependency only when it
-  materially reduces risk or complexity.
 
-## State And Persistence Policy
+- Retained application packages may import Promptkit's root package.
+- They must not import Promptkit `internal` packages.
+- They must not import Promptkit catalog modules directly.
+- They must not import the removed Scriptorium root facade or recreate former
+  framework package families.
+- Adapter-owned interfaces use Promptkit public values when a consumer-side
+  substitution boundary is needed.
+- Scriptorium passes omitted framework settings as zero values so Promptkit
+  applies its own defaults.
 
-Scriptorium has no durable run-state store.
+The repository architecture guard enforces these import and removal
+invariants.
 
-- No built-in resume/checkpoint/archive behavior.
+Cross-project changes land and release in Promptkit before Scriptorium adopts
-- Recovery model is rerun after correcting inputs/config/environment.
+the tagged dependency. Do not commit Go workspaces, local replacements,
+vendored Promptkit implementation, or unpublished dependency assumptions.
 
-## Contract Ownership
+## Retained Boundaries
 
-The [CLI](../cli.md), [configuration](../config.md), [HTTP API](../api.md),
+- `internal/adapter/cli` owns commands, flags, configuration precedence,
-[public Go package](../consumers/pkg-scriptorium.md), and
+  process streams, output files, summaries, and exit codes.
-[integration](../integrations/) documents own their respective external
+- `internal/adapter/http` owns routes, strict JSON DTOs, size limits, response
-contracts. This policy keeps only the architectural boundaries that govern
+  mapping, status mapping, and the restricted artifact reader.
-their implementation.
+- `internal/config` owns discovery and Scriptorium's application definition;
+  ConfigKit owns strict YAML decoding and the load/override pipeline.
+- `internal/defaults` owns Scriptorium application and HTTP defaults only.
+- `internal/format` owns deterministic prepared-run and definition-inspection
+  text and JSON presentation.
+- Promptkit owns framework orchestration and contracts. Its
+  [format reference](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md)
+  and
+  [outbound integration contract](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/integrations/openai-compatible-chat.md)
+  are canonical.
 
-## Error Handling And Logging
+## HTTP Artifact Security Boundary
 
-- Wrap errors with domain/operation context.
+Ordinary CLI file loading is provided by Promptkit. Scriptorium's HTTP adapter
-- Map public error identities to adapter-appropriate statuses/codes without
+injects a restricted `promptkit.ArtifactReader` for inbound HTTP requests.
-  leaking sensitive internals.
+That reader denies file references without an artifact root, enforces the
-- Never emit raw secret values.
+configured byte limit, and applies Scriptorium's lexical root-containment rule.
+The operating system still follows symlinks after the lexical check.
 
-## Testing And Documentation
+This boundary handles untrusted request references under the documented
+deployment model; it is not a filesystem sandbox. Defending against a
+privileged actor concurrently modifying the host filesystem is outside the
+adopted scope, not a claim that such activity cannot occur. Do not infer
+additional defenses or guarantees from hypothetical threats; raise unsettled
+scope decisions under the [agent policy](agents.md).
 
-Testing philosophy and change-validation expectations are defined by the
+The [HTTP API](../api.md) owns observable request outcomes, and
-[testing policy](testing.md). Documentation ownership and maintenance rules are
+[operations](../operations.md) owns deployment permissions and root selection.
-defined by the [documentation policy](documentation.md).
+
+## State, Errors, And Secrets
+
+Scriptorium has no durable run-state store, checkpoint, cache, or resume
+mechanism. Recovery is a new request after correcting inputs, configuration, or
+environment.
+
+Each request is self-contained from the caller's perspective, without
+conversation or workflow state retained from completed requests. This does
+not mean the process is internally stateless. Shared engines, backend capacity
+and queue accounting, in-flight coordination, cancellation, and server
+lifecycle resources are permitted and must be shared where necessary to
+enforce configured backend limits across concurrent requests. Such state must
+be concurrency-safe and does not create a durable user-workflow contract.
+
+Adapters map Promptkit public error identities into CLI exits or HTTP statuses
+without classifying by message text. Raw API keys are not accepted in
+Scriptorium configuration, CLI arguments, or HTTP payloads, and resolved
+secrets must not be emitted.
 
 ## Architectural Invariants
 
-- `Runner.Run` reuses `Runner.Prepare` flow.
+- External YAML and JSON decoding remains strict.
-- Raw API key values must not be accepted through external configuration or
+- CLI and HTTP behavior remains presentation and transport logic rather than
-  request payloads, and resolved secret values must not be emitted.
+  framework orchestration.
+- Explicit numeric request overrides preserve presence, including zero.
+- HTTP artifact containment and byte limits remain Scriptorium policy.
+- No application package depends on Promptkit implementation packages.
 
 ## Non-Goals
 
-- Do not move orchestration responsibilities from external callers into Scriptorium.
+- Do not recreate an in-process Scriptorium framework API or compatibility
-- Do not add adapter-specific business logic in `internal/adapter/*` packages.
+  facade.
-- Do not bypass repository/renderer/validator/LLM boundaries by introducing cross-package coupling.
+- Do not copy Promptkit types, defaults, built-in profiles, or implementation
+  into Scriptorium.
+- Do not move CLI, inbound HTTP, process, or deployment policy into Promptkit.
+- Do not add durable workflow, archive, or resume behavior.
+- Do not add application-managed prompt modification, follow-up message flows,
+  conversation management, or multi-step workflow orchestration.
 
 Work that is not implemented belongs in `docs/roadmap/`.

docs/policy/documentation.md

@@ -1,5 +1,9 @@
 # Documentation Policy
 
+**Base Policy Version:** 1.4
+
+**Last Updated:** 2026-09-26
+
 ## Purpose
 
 This policy assigns each documentation topic to one canonical owner. Its goal is
@@ -30,10 +34,14 @@ semantics.
 Outside `docs/roadmap/`, documentation describes implemented behavior only.
 Partial features may be described only to their implemented boundary.
 
-ADRs are the narrow exception: an ADR may record an accepted architectural
+Architectural constraints may govern future changes without implying that the
-decision before implementation, but acceptance must not be presented as proof
+components or capabilities they would govern already exist. This does not
-that the behavior exists. The roadmap owns implementation status and sequencing
+permit describing a proposed system structure as implemented.
-until the decision is implemented. Current architecture, user, operator,
+
+ADRs may record an accepted architectural decision before implementation, but
+acceptance must not be presented as proof that the behavior exists. The roadmap
+owns implementation status and sequencing until the decision is implemented.
+Current architecture, user, operator,
 integration, and internal documentation are updated when the behavior lands.
 
 ### Audience And Detail
@@ -63,17 +71,25 @@ secret values.
 
 | Topic | Canonical owner | Owned content | Content owned elsewhere |
 | --- | --- | --- | --- |
-| Product orientation and minimal end-to-end quickstart | `README.md` | What this project is, why it is useful, one shortest successful invocation, and links onward. | Complete command reference, configuration reference, operational procedures, implementation detail. |
+| Product orientation and minimal end-to-end quickstart | `README.md` | What this project is, why it is useful, one shortest successful invocation, and links onward, including license and attribution navigation. | Complete command reference, configuration reference, operational procedures, implementation detail. |
 | Contributor entry point | `docs/development.md` | Task-oriented reading guide, minimal contributor orientation, baseline validation commands, and links to canonical docs. | Package inventory, architecture rules, subsystem behavior, and detailed change recipes, which belong in the relevant internal component document. |
-| Current application architecture | `docs/policy/architecture.md` | System shape, normative ownership, dependency direction, architectural boundaries, invariants, safety properties, and non-goals. | Concrete package inventory, implementation mechanics, contributor procedures, decision history, future work. |
+| Application architecture policy | `docs/policy/architecture.md` | System shape, normative ownership, dependency direction, architectural boundaries, invariants, safety properties, and non-goals. | Concrete package inventory, implementation mechanics, contributor procedures, decision history, future work. |
+| Agent policy | `docs/policy/agents.md` | Agent implementation discipline, proportionality, idiomatic simplicity, local commit rules, and rules against inventing requirements, restrictions, guarantees, or repository policy. | Application contracts, architecture, testing policy, and contributor procedures. |
 | Documentation organization | `docs/policy/documentation.md` | Documentation ownership, audience boundaries, maintenance rules, and ADR/document lifecycle. | Application architecture or product behavior. |
 | Testing policy | `docs/policy/testing.md` | Test philosophy, risk-based sufficiency, test boundaries, doubles, coverage guidance, regression-test policy, and criteria for adding, rewriting, or deleting tests. | Subsystem behavior, application contracts, subsystem-specific test inventories, and implementation plans. |
 | CLI contract | `docs/cli.md` | Commands, arguments, flags, invocation semantics, and exit codes. | End-to-end operating procedures, configuration field definitions, runtime filesystem layout, module implementation details. |
-| Configuration contract | `docs/config.md` | Discovery and precedence, file schema, fields, defaults, environment overrides, validation rules, and user-selectable module or validator keys. | Complete example files, CLI syntax, runtime state lifecycle, module implementation details. |
+| Configuration contract | `docs/config.md` | Application discovery and precedence, source locations, server fields, render default, HTTP limits, and credential mapping. | Promptkit framework formats and defaults, complete example files, CLI syntax, runtime lifecycle, and implementation detail. |
 | Operations | `docs/operations.md` | Runtime workflows, physical filesystem and state layout, output, cache, and debug handling, resume, cleanup, permissions, recovery, and operational limits. | CLI flag syntax, configuration field definitions, logical output schemas, implementation mechanics. |
+| Release policy | `docs/policy/release.md` | Versioning and compatibility, release integrity and immutability, documentation requirements, proportionate gates, publication controls, source completion, and optional verification boundaries. | Repository-specific commands, installation guidance, historical summaries, and CI implementation details. |
+| Release procedure | `docs/release.md` | Maintainer prerequisites, candidate preparation, publication command and guards, asynchronous delivery, optional diagnostics, and failure recovery. | General release requirements, runtime operations, historical announcements, and current application contracts. |
+| Version-specific release notes | `docs/releases/` | Immutable release summaries, compatibility notices, and migration announcements for one published version. | Complete CLI, HTTP, configuration, operations, or dependency contracts. |
+| Open source licensing and attribution policy | `docs/policy/oss.md` | House attribution format, license-text and notice-link conventions, discoverability, maintenance, and handling of concrete exceptions. | Component entries, license texts, release commands, and dependency security review. |
+| Project license | `LICENSE` | The project's own license terms. | Upstream component attribution and dependency license texts. |
+| Upstream component attribution | `docs/oss/attribution.md` | Component names, copyright statements, license identification, and license, notice, and source links. | General attribution policy and complete standard license texts. |
+| Standard dependency license texts | `docs/oss/licenses/` | Complete, verbatim standard license texts shared by attribution entries where applicable. | Project-specific upstream notices, attribution prose, and policy interpretation. |
 | Public HTTP contract | `docs/api.md` | Routes, authentication, media types, request and response schemas, status codes, pagination, caching, idempotency, rate limits, and HTTP retry semantics. | Client walkthroughs, upstream or downstream integration internals, implementation detail. |
-| Consumer guidance | `docs/consumers/` | Task-oriented use of the public interface, minimal client examples, and consumer responsibilities. | HTTP wire semantics, external protocol contracts, internal implementation detail. |
+| Consumer guidance | `docs/consumers/` | Choosing between Scriptorium's executable interfaces and understanding consumer responsibilities. | HTTP wire semantics, CLI syntax, Promptkit's Go package, and internal implementation detail. |
-| External and durable integration contracts | `docs/integrations/` | External file formats and protocols, upstream and downstream contracts, logical output bundle paths and schemas, media types, and compatibility behavior. | Physical runtime placement and lifecycle, internal transformations, CLI syntax, configuration defaults. |
+| External and durable integration contracts | `docs/integrations/` | Scriptorium-owned process and executable integration contracts. | Promptkit framework formats and outbound provider protocols, physical runtime placement, internal transformations, CLI syntax, and configuration defaults. |
 | Implemented component inventory | `docs/internal/overview.md` | Current packages and components, their implemented responsibilities, and links to focused internal docs. | Normative architecture, contributor reading policy, external contracts. |
 | Internal component behavior | Other files under `docs/internal/` | Implementation flow, internal collaborators and state transitions, package-local guarantees and failures, and relevant tests. | Global architecture invariants, configuration definitions and defaults, external schemas, operator procedures. |
 | Architectural decision history | `docs/adr/` | Significant decisions, context, alternatives, rationale, consequences, and supersession history. | Current behavior reference, implementation status, task sequencing. |
@@ -101,6 +117,22 @@ runtime state and how to operate or recover the application. When a workflow
 crosses these topics, choose the document that owns the task and link to the
 other contracts.
 
+### Releases
+
+The release policy owns release requirements; the release procedure supplies
+the commands that satisfy them. Release notes are historical summaries, not
+current-state contract owners. The checked-in note at an immutable tag records
+that release; current documentation changes with the behavior it describes.
+Neither a procedure nor a note may weaken policy or defer required updates to
+canonical contracts.
+
+### Open Source Attribution
+
+The [OSS policy](oss.md) defines the House Format and README and release-link
+conventions. Attribution entries own component-specific information. README
+and release documents provide navigation to those canonical materials; the
+release procedure owns URL construction and publication mechanics.
+
 ### Contracts And Implementation
 
 Integration and API documents define externally observable shapes and
@@ -148,6 +180,11 @@ ADR; rejected product ideas belong in the roadmap.
 
 ## Maintenance
 
+Every policy document records its underlying template version and local
+last-updated date immediately below the title. Update the date when revising
+local policy; change the base version only when adopting a newer template.
+Do not retain template adoption instructions in the local policy.
+
 When behavior changes, update its canonical owner in the same change. If
 ownership moves, remove the old definition and replace it with a link where
 navigation remains useful.

docs/policy/oss.md

@@ -0,0 +1,139 @@
+# Open Source Licensing And Attribution Policy
+
+**Base Policy Version:** 1.1
+
+**Last Updated:** 2026-09-26
+
+## Purpose And Scope
+
+This policy establishes a repeatable House Format for open source attribution
+and license notices. It covers upstream components incorporated into or
+distributed with the project, including relevant transitive dependencies and
+copied code or assets. Treatment follows the component's terms and actual use,
+rather than its classification as a direct dependency.
+
+The baseline is a publicly available source repository with releases published
+alongside it. The format is independent of language, forge, and build system.
+It does not require attribution for every development tool, establish license
+compatibility, or resolve obligations beyond attribution and notice handling.
+
+## Canonical Locations
+
+The [documentation policy](documentation.md) assigns ownership:
+
+- `LICENSE` contains the project's own license. Dependency attribution does
+  not relicense the project.
+- `docs/oss/attribution.md` contains the canonical component entries.
+- `docs/oss/licenses/` contains complete, verbatim standard license texts,
+  including companion texts where applicable.
+
+Use recognizable license filenames, such as `Apache-2.0.txt` or `LGPL-3.0.txt`.
+A shared standard text may serve multiple entries. Keep explanations outside
+license texts and preserve distinct versions and exceptions.
+
+## House Format
+
+Each component entry has five fields:
+
+1. **Project name**, normally as the entry heading.
+2. **Upstream copyright statement or statements**, preserving their wording.
+3. **SPDX license identifier or expression**, when applicable.
+4. **License and notice links**, covering the applicable standard texts and
+   upstream project-specific material.
+5. **Source repository link**, identifying the source corresponding to the
+   imported version.
+
+Illustrative Markdown, with placeholders for the actual upstream information:
+
+```markdown
+## Example Library
+
+Copyright <upstream copyright statement>
+
+SPDX-License-Identifier: Apache-2.0
+
+License and notices: [Apache 2.0](licenses/Apache-2.0.txt) | [NOTICE](<upstream NOTICE URL at the imported commit>)
+
+Source: [Example Library](<upstream repository URL at the imported commit>)
+```
+
+These are five fields, not a line limit. Include multiple statements and links
+where needed. Omit the SPDX field when no applicable identifier exists; identify
+nonstandard terms accurately through the linked text. Preserve licensing
+alternatives and exceptions, and record a selected option when relevant. Do not
+invent an identifier or silently resolve an unsettled licensing choice.
+
+## License Texts And Upstream Links
+
+Link standard license texts to their local copies. Link project-specific
+notices to the upstream copies instead of storing them locally. Every upstream
+repository or notice link must identify the exact commit corresponding to the
+imported version, including the selected source revision for copied material.
+Do not use moving branches or version tags as substitutes for that commit.
+
+Classify material by its contents, not its filename. An upstream `LICENSE`,
+`COPYING`, or similar file may contain project-specific notices or exceptions
+in addition to standard wording. Link both the local standard text and the
+commit-specific upstream file when needed. Make companion license texts directly
+reachable from the entry rather than leaving readers to infer their location.
+
+For project-specific license and attribution material, this policy accepts
+direct links to the applicable upstream texts as satisfying reproduction,
+inclusion, or copy requirements. This is the adopted house interpretation.
+Agents must apply it without adding local-copy requirements or seeking repeated
+approval solely because a license uses those terms.
+
+This interpretation concerns notice reproduction. Concrete obligations such as
+marking modified files or supplying corresponding source receive their own
+applicable treatment. Preserve required notices already present in incorporated
+source files; the central attribution entry does not authorize stripping them.
+
+## Discoverability
+
+End the project's README with two friendly statements linking to its actual
+license and the attribution document. For Scriptorium:
+
+```markdown
+Scriptorium is licensed under the [BSD 3-Clause License](LICENSE).
+
+[Open Source attribution notices](docs/oss/attribution.md) are available.
+```
+
+Each new checked-in release document and its hosted download page must end
+with links whose visible text is `LICENSE | ATTRIBUTION`. Use absolute URLs to
+those files at the release's immutable tag or corresponding immutable source
+revision so the links work in both locations. This release navigation is distinct
+from upstream component links, which must use the imported commit.
+
+Reuse the checked-in release document as the hosted release body where supported.
+The release procedure owns concrete URLs and publication mechanics for delivering
+the links through the selected channel. Do not maintain duplicate notice lists.
+These conventions do not by themselves require separate downloadable license
+assets, source bundles, or a different binary package format.
+
+## Maintenance And Exceptions
+
+Update notices in the change that adds, removes, upgrades, copies, or changes
+the distribution of a relevant component. Check the selected source's license
+and notices rather than assuming they are unchanged. Update affected entries,
+commit links, and texts; retain historical versions through Git.
+
+Check affected statements, faithful standard-text copies, and link destinations
+as part of ordinary change review. For a future release tag, check intended file
+paths against the candidate source; the tag need not resolve remotely before
+publication. Do not add publication-time network checks, CI polling, recurring
+legal sign-offs, mandatory scanners, or a full software bill of materials merely
+to implement this policy.
+
+Use the House Format routinely. Raise an exception only for a concrete obligation
+or unresolved rights question it does not address, including any arising from a
+particular distribution channel. Record the issue and selected treatment in the
+adopted policy or affected attribution entry as appropriate. Resolve the issue
+before the affected use or distribution without reopening settled choices.
+Common ownership of projects is neither required nor a blanket exception.
+
+Apply the formatting convention prospectively. Do not rewrite published tags,
+notes, binaries, or checksums to retrofit it. Address actual omissions deliberately
+under the applicable terms and the [release correction policy](release.md#immutability-and-failure-recovery).
+Ordinary attribution maintenance and release links are preparation work, not new
+release approval gates.

docs/policy/release.md

@@ -0,0 +1,213 @@
+# Release Policy
+
+**Base Policy Version:** 1.2
+
+**Last Updated:** 2026-09-26
+
+## Purpose
+
+This policy defines a proportionate workflow for validating and publishing an
+intended source revision under a fresh version. Releases should require little
+routine intervention, avoid repeated work, and preserve published contents.
+
+The repository-specific commands belong in `docs/release.md`. Historical release
+summaries belong in `docs/releases/`. The procedure must agree with the adopted
+policy and link to it rather than introduce additional release requirements.
+
+## Release Model And Completion
+
+A source release identifies one exact committed source revision through an
+immutable version tag and a version-matched, checked-in release note. The
+primary release branch is `main`; the authoritative publication remote is
+`origin`.
+
+A successful push of the intended tag, with its source commit available on the
+authoritative primary branch, completes the release. Publish `main` before
+invoking the publication command; the command requires
+that the remote branch exactly identifies the validated candidate and pushes
+only the selected annotated tag.
+
+Release commands must finish at successful publication. They must not wait for
+or poll CI, require successful CI status, inspect downloadable artifacts, or
+check consumer installation or Go module availability as completion gates.
+A failed or ambiguous push requires resolving the authoritative remote state
+before declaring success or retrying; successful pushes do not require a
+separate remote read-back gate.
+
+Scriptorium publishes Linux binaries and checksums asynchronously from the
+tagged source. The procedure must identify those deliverables and the
+responsibility of their automation. Published deliverables must be traceable
+to that source and identify the same version.
+
+Artifact delivery is a separate status. A successful tag push is not evidence
+that artifacts are available. Delivery failures do not reverse source-release
+success, and optional investigation must not delay release completion.
+
+## Versioning And Compatibility
+
+Stable releases use Semantic Versioning in the form `vMAJOR.MINOR.PATCH`, with
+no leading zeroes. Prereleases are not part of the adopted release channel.
+
+The selected version must be unused locally and on the authoritative remote.
+Do not require queries to every configured remote or publication service.
+A version known to have already been published must not be reused, even if the
+normal guards do not inspect that channel. Adding a distribution channel
+requires a deliberate update to the policy and procedure where needed.
+
+For releases at or after `v1.0.0`:
+
+- a major release may make intentional incompatible changes;
+- a minor release may add backward-compatible behavior; and
+- a patch release may make backward-compatible fixes.
+
+Before `v1.0.0`, a minor release may change a documented public, operational,
+configuration, data, integration, or compatibility contract when the release
+note explains the impact and required consumer action. A patch release must
+not intentionally break those contracts within its minor line.
+
+Additional compatibility promises and deliberate exceptions belong in the
+adopted policy or canonical contract documentation. Release notes explain
+changes; they do not redefine current compatibility contracts.
+
+## Release Documentation And Preparation
+
+Every new release must include `docs/releases/<version>.md` in the tagged
+source tree. Use the complete version tag as the filename and begin with a
+title containing the product name and that exact version.
+
+Include a short summary and any relevant compatibility impact or upgrade
+instructions. Keep the note proportionate to the change. Fixed sections and
+explicit no-action boilerplate are not required. Existing historical notes
+need not be rewritten to adopt this format.
+
+Include the release footer defined by the [OSS policy](oss.md#discoverability)
+in each new release document and preserve it on the hosted download page. The
+release procedure defines the concrete URLs and publication mechanics. Prepare
+these links with the release note; they do not add a network check or approval
+gate.
+
+Keep exact current contracts in their canonical documents and update affected
+documentation with the behavior change. Link to those documents from the note
+where useful. A release note must not substitute for current documentation.
+Use annotated tags with their message derived from the checked-in note rather
+than requiring a separately authored account of the same release.
+
+Version selection, release-note content, and retirement of completed roadmaps
+are preparation responsibilities, not separate human approval gates. Preserve
+planned and deferred work and repair affected links when retiring roadmaps.
+Ordinary change review covers unintended files, credentials, and private data;
+do not repeat it as a release-specific sign-off. Ignored local files are not
+prohibited merely because they exist: they are not included in the tagged source.
+
+## Candidate Validation
+
+Provide one publication command that validates the final committed candidate,
+checks publication state, and publishes the intended refs. A validation-only
+mode or command may be provided for diagnosis, but must not be a required step
+before publication repeats the same checks.
+
+Run the complete deterministic, offline default test suite once for the final
+candidate, following the [testing policy](testing.md), and verify the required
+build targets. Select those targets for the application's actual support
+commitments; native testing on each platform and access to particular hardware
+are not default release prerequisites.
+
+The selected test invocation includes the race detector because the HTTP
+service shares engines and backend capacity state across concurrent requests.
+This single invocation covers both ordinary assertions and race detection.
+Build both declared Linux architectures with the hosted release flags to catch
+cross-compilation and packaging failures; native test hardware for each target
+is not required. Existing architecture tests enforce dependency boundaries.
+
+Retain narrow source guards against committed workspaces, vendor trees, and
+module replacements: these can otherwise make a passing local build depend on
+unpublished or substituted framework code. Disable workspace discovery and
+vendor mode during validation. These guards preserve the established
+cross-project boundary; they do not require exact dependency-version audits or
+module-metadata rewrites at release time.
+
+Additional gates must address a concrete risk that the existing checks do not
+adequately cover. Do not automatically require linting, race testing, module
+hygiene audits, documentation audits, credential scans, example validation, or
+expanded platform matrices solely because they are possible. Retain such
+checks when their distinct protection justifies their cost. A one-time migration
+check must not silently become a permanent release requirement.
+
+Release tests must not require real credentials, mutable application services,
+paid APIs, provider probes, or inference calls. The procedure describes
+dependency preparation separately from offline validation.
+
+Avoid duplicate validation across release phases. Successful checks for the
+same final candidate need not be repeated solely to satisfy another phase;
+any reuse must clearly apply to that exact candidate. Persistent validation
+caches are not required. If the candidate changes, validate the new candidate.
+Cheap publication-state checks may be repeated immediately before pushing
+because local or remote state may have changed during validation.
+
+Automate mechanical guards. Human review gates are strongly disfavored: add one
+only through an explicit project-specific policy decision explaining the
+concrete risk and why ordinary change review or automation is insufficient.
+Do not add routine confirmations for checks the command can perform itself.
+
+## Publication Guards
+
+Automate the checks needed to publish the intended source under a fresh version:
+
+- the version has the adopted format and is unused locally and on the
+  authoritative remote;
+- the worktree and index are clean on the primary release branch;
+- the source being published is the exact candidate that passed validation,
+  including its matching release note;
+- the remote primary branch already identifies that exact candidate; and
+- the tag identifies the validated candidate and only the intended refs are
+  published.
+
+Fetch the authoritative branch and tag state as needed for these checks.
+Do not force branch or tag updates to bypass a failed guard. Publish explicit
+refs rather than all local tags. Do not require CI success, publication-service
+availability checks, or a separate manual confirmation for each guard.
+
+## Immutability And Failure Recovery
+
+Published version tags and published contents are immutable. Do not move,
+overwrite, recreate, or delete a published tag, or replace a published artifact,
+checksum, signature, provenance statement, or release note under that version.
+The checked-in note at the immutable tag is that release's historical record.
+
+If validation fails before publication, correct and commit the candidate and
+rerun the publication command. If a push fails or its outcome is ambiguous,
+inspect the authoritative remote before retrying. Remove an unpublished local
+tag only after confirming it was never published or used by a release channel.
+An unavailable remote leaves publication status unknown; do not overwrite a tag
+to resolve uncertainty.
+
+Transient network, authentication, CI, or consumer-availability failures do not
+by themselves require a new version. Asynchronous delivery may be retried from
+the same immutable tag. Missing artifacts may be published later, provided
+existing published contents are not replaced and the additions remain consistent
+with the tagged source and any already-published checksum manifest. If that
+cannot be achieved, publish a new version.
+
+A defect requiring changes to published source or contents requires a corrected
+commit, a new semantically appropriate version, a matching release note, and
+the release procedure again. Leave the original release intact. A channel's
+yank, deprecation, or advisory mechanism may warn consumers away from a defective
+release without replacing its contents or reusing its version.
+
+## Repository Release Procedure
+
+Maintain `docs/release.md` as a short, executable maintainer runbook. It must
+identify:
+
+1. prerequisites, primary branch, and authoritative remote;
+2. version and release-note preparation;
+3. one publication command with its selected local checks and automated guards;
+4. declared deliverables, required build targets, and automation responsibilities;
+5. the successful-push completion point and separately reported delivery status;
+   and
+6. failure handling, ambiguous-push recovery, and asynchronous delivery retries.
+
+Use copyable commands where practical. Keep optional diagnostics and consumer
+verification clearly optional. The procedure must not turn preparation work,
+ordinary change review, or post-publication investigation into additional
+release gates.

docs/policy/testing.md

@@ -1,5 +1,9 @@
 # Testing Policy
 
+**Base Policy Version:** 1.1
+
+**Last Updated:** 2026-09-26
+
 ## Purpose
 
 Our tests exist to make **incorrect changes expensive and correct changes cheap**.
@@ -8,29 +12,16 @@ We do not optimize for test count, line coverage, exhaustive isolation, or the f
 
 ## Every test has a cost
 
-Testing is not an unqualified good. Every test imposes both an immediate cost and a continuing lifetime cost.
+Every test has an immediate and continuing cost: writing, review, execution,
-
+diagnosis, fixture maintenance, and updates when legitimate behavior changes.
-A test must be:
+Tests can also constrain refactoring, duplicate policy, and add failure noise.
-
-- written and reviewed;
-- understood by future maintainers and coding agents;
-- executed in local and CI workflows;
-- diagnosed when it fails;
-- updated when legitimate behavior changes;
-- maintained as fixtures, APIs, and dependencies evolve; and
-- removed or rewritten when it becomes redundant, brittle, misleading, or obsolete.
-
-Tests also create cognitive and architectural friction. They can constrain refactoring, duplicate policy, slow feedback loops, add noise to failures, and cause harmless implementation changes to require unrelated edits across the suite.
 
 A test is warranted only when the confidence it provides justifies these costs.
-
+Evaluate that tradeoff at two levels:
-Apply this cost-benefit analysis at two levels:
 
 1. **Per test:** What realistic defect does this test detect, how consequential would that defect be, and is that protection worth the test's lifetime cost?
 2. **Across the suite:** Does this collection provide materially more confidence than a smaller, simpler suite would?
 
-The preferred test suite is a **lean suite that provides sufficient confidence in the risks that matter, without redundant or low-value tests**. We seek sufficient confidence with the least unnecessary testing friction, not the fewest possible tests.
-
 Some friction is intentional. Tests should make dangerous changes—such as breaking compatibility, corrupting data, violating security boundaries, or reintroducing subtle bugs—require deliberate review. They should not make ordinary internal changes needlessly expensive.
 
 The cost of a test is not a reason to omit testing by default. Do not cite maintenance cost abstractly. When omitting a plausible test, be able to state why the protected failure is low-risk, already covered, obvious, reversible, or cheaper to detect elsewhere. For consequential, subtle, or difficult-to-observe behavior, the presumption should favor testing.
@@ -55,7 +46,7 @@ Control clocks, randomness, environment variables, and other process-global or m
 
 ## What deserves tests
 
-Prioritize tests for:
+To the extent the following features are present in the application, prioritize tests for:
 
 1. Public and package-level contracts.
 2. Domain rules and important invariants.
@@ -67,7 +58,18 @@ Prioritize tests for:
 
 A package-level contract is behavior relied upon by another package or major collaborator, not every observable detail of a package implementation.
 
-For behavior involving **data integrity, destructive operations, compatibility, security, concurrency, idempotency, or recovery**, presume that durable tests are required unless the behavior is already credibly protected at another layer.
+Choose tests for requested behavior and established contracts. Tests must not
+introduce new restrictions, guarantees, or threat scenarios merely because they
+could be asserted. Follow the [agent policy](agents.md) when deciding whether a
+behavior belongs to the contract; current implementation behavior alone is not
+sufficient authority.
+
+For established behavior involving **data integrity, destructive operations,
+compatibility, security, concurrency, idempotency, or recovery**, favor durable
+tests for realistic failures whose consequences warrant protection. Identify
+the failure and the existing contract it would violate. These categories call
+for attention, not an automatic test inventory or permission to strengthen the
+application's guarantees. Account for protection already provided at other layers.
 
 Do not add tests merely because a function, branch, or line exists. Do not add a test when the same meaningful risk is already adequately protected elsewhere.
 
@@ -75,6 +77,13 @@ Do not add tests merely because a function, branch, or line exists. Do not add a
 
 Test through the narrowest stable boundary that expresses the behavior clearly.
 
+For application configuration, ConfigKit owns exhaustive YAML grammar,
+source traversal, import/overlay composition, provenance, and inspection
+renderer tests. Scriptorium tests its selected definition, source discovery,
+CLI override presence, command prerequisites, runtime conversion, credential
+boundary, and representative execution/inspection workflows with the tagged
+library. Do not copy the upstream parser test matrix into this repository.
+
 This is often the package API, but it may instead be:
 
 - a smaller pure function when dense domain logic is most clearly isolated there;
@@ -85,11 +94,7 @@ Do not force all behavior through oversized end-to-end tests. Do not test every
 
 ## Test behavior, not implementation
 
-A test should protect a decision, contract, or invariant—not memorialize the current implementation.
+A test should protect a decision, contract, or invariant. A test must not memorialize the current implementation.
-
-Before adding or retaining a test, ask:
-
-> What realistic defect would this test catch?
 
 A test is suspect when its main purpose is to detect that someone:
 
@@ -102,8 +107,6 @@ A test is suspect when its main purpose is to detect that someone:
 
 Refactoring should normally require no test edits unless the refactored structure is itself part of the contract.
 
-A test can be factually correct and still have negative value. Accurately describing current behavior is not enough; the protected behavior must be important enough to justify the future friction.
-
 ## Expected effects of different changes
 
 Use the following expectations when evaluating test failures and test maintenance:
@@ -121,10 +124,11 @@ A test failing is not the same as a test needing to be edited. Many tests may co
 
 Configurable thresholds and defaults must not be duplicated throughout the test suite.
 
-For example, do not encode an internal concurrency limit indirectly:
+For this example, assume the selected contract rejects a request to start more
+processes than a configured limit. Do not encode its production default indirectly:
 
 ```go
-// Production policy:
+// Production default:
 const maxConcurrency = 4
 
 // Brittle test:
@@ -142,18 +146,23 @@ require.NoError(t, runner.Start(limit))
 require.ErrorIs(t, runner.Start(limit+1), ErrTooMuchConcurrency)
 ```
 
-The test should prove:
+For this selected contract, the test should prove:
 
 - the configured limit is accepted; and
 - one beyond the configured limit is rejected.
 
+Rejection is not a general requirement for concurrency control. If the selected
+contract queues excess work or limits active workers while accepting larger
+batches, test that behavior instead. Do not add rejection or a configurable
+limit solely to reproduce this example.
+
 The production default should be tested exactly only when its literal value is itself a public, operational, safety, protocol, or compatibility requirement.
 
 Apply the same rule to limits, timeouts, capacities, retry counts, and ranges: test relationships and behavior, not duplicated literals.
 
-For concurrency limits, test both kinds of behavior when relevant:
+For established concurrency limits, distinguish these behaviors where the contract requires them:
 
-1. **Configuration enforcement:** invalid or excessive requested values are handled correctly.
+1. **Configuration handling:** values are accepted or rejected according to the selected contract.
 2. **Runtime enforcement:** observed peak concurrency never exceeds the configured limit.
 
 Use a test-controlled limit and measure the behavior relative to that limit. Do not merely assert today's default value.
@@ -162,18 +171,21 @@ Use a test-controlled limit and measure the behavior relative to that limit. Do
 
 Each behavior should have a clear test owner.
 
-- Parser tests own parsing cases.
+- Configuration tests own application YAML, strict decoding, discovery,
-- Validator tests own validation rules.
+  precedence, and application defaults.
-- Domain tests own transformations and invariants.
+- CLI tests own argument mapping, streams, summaries, exit behavior, and
-- Adapter tests own external integration behavior.
+  representative command workflows.
-- Orchestrator tests own coordination and failure propagation.
+- HTTP tests own DTOs, strict decoding, limits, status mapping, and restricted
-- CLI tests own argument and configuration mapping.
+  artifact policy.
-- End-to-end tests prove that representative assembled workflows work.
+- Formatter tests own prepared-run and definition-inspection text and JSON
+  presentation.
+- Architecture tests own dependency direction and removal invariants.
+- Promptkit owns framework parsing, orchestration, validation, profiles, and
+  model-client behavior. Scriptorium's definition compatibility fixtures protect
+  its adapter plumbing without duplicating the upstream format contract.
 
 Higher-level tests should not repeat every lower-level case. A single intentional policy change should not require unrelated edits across many test files.
 
-Tests that are individually reasonable may still be collectively redundant. Evaluate the marginal value of each additional test in light of the protection already provided by the rest of the suite.
-
 ## Use test doubles deliberately
 
 Choose the least elaborate test double that provides the required control or observation.
@@ -197,15 +209,16 @@ Do not use mocks merely to isolate every object or reproduce the implementation'
 
 ## Go-specific guidance
 
-Use:
+Select techniques according to the behavior and risk being tested. The following
+are options, not a checklist that every package or application must satisfy:
 
 - table-driven tests for meaningful behavioral categories and boundaries;
 - `t.TempDir()` for real filesystem behavior;
 - `httptest.Server` for realistic HTTP interactions;
-- fuzz tests for parsers, normalization, path handling, and broad input spaces;
+- fuzz tests when exploring broad input spaces, such as parsers or path handling, adds useful protection beyond representative cases;
 - golden files only when the complete output is intentionally stable;
 - integration tests where correctness depends on component interaction; and
-- a small number of representative end-to-end tests.
+- a small number of representative end-to-end tests when assembled workflows expose meaningful risks not adequately covered at narrower boundaries.
 
 Avoid exact error-string assertions unless the wording is itself contractual. Prefer `errors.Is`, `errors.As`, typed errors, or structured error fields.
 
@@ -221,9 +234,9 @@ Coverage is a diagnostic, not a target.
 
 Use it to find untested critical branches and unexpectedly weak packages. Do not write low-value tests solely to increase a percentage, and do not infer test quality from coverage alone.
 
-Pure domain logic will often warrant higher coverage than CLI wiring or external adapters. Uneven coverage is acceptable when it reflects risk.
+Security-sensitive HTTP containment and external mappings may warrant denser
-
+coverage than straightforward process wiring. Uneven coverage is acceptable
-Increasing coverage is valuable only when the newly covered behavior protects a meaningful risk at an acceptable cost.
+when it reflects risk.
 
 ## Regression tests
 
@@ -253,44 +266,26 @@ Strong candidates include tests that:
 
 Several brittle tests may encode one genuine requirement. Replace them with one durable behavior-level or invariant test rather than preserving all of them.
 
-Deleting a low-value test can improve the quality of the suite by reducing noise, maintenance burden, and friction around legitimate change.
-
 ## Reviewing a proposed test
 
 Use the following questions when the value, boundary, or durability of a proposed test is not self-evident. Significant test additions should be reviewable against them, but written answers are not required for every routine test.
 
-1. What realistic defect would it catch?
+1. Which requested behavior or established contract does it protect, and what realistic defect would violate it?
-2. How likely is that defect?
+2. How likely and consequential is that defect, and is it already protected elsewhere?
-3. How consequential would it be?
+3. What is the narrowest stable boundary that can test it clearly?
-4. Is the behavior already protected elsewhere?
+4. Would a correct internal refactor or a change to an incidental default require test edits?
-5. At which layer should this behavior be owned?
+5. Does its confidence justify its maintenance, execution, and diagnostic cost, or would a smaller test suffice?
-6. Does the test assert a durable contract or an incidental implementation detail?
-7. Could the implementation be refactored without changing the behavior and without editing this test?
-8. What should cause this test to fail?
-9. What legitimate changes should not cause this test to fail?
-10. What ongoing maintenance, execution, and diagnostic cost will the test impose?
-11. Is there a smaller or more direct test that protects the same risk?
-
-Do not add the test when its expected lifetime cost exceeds its expected protective value.
-
-When deciding not to test plausible behavior, record or be able to explain why the risk is low, already protected, obvious, reversible, or cheaper to detect elsewhere.
 
 ## Definition of sufficient
 
 A test suite is sufficient when:
 
-- important contracts and invariants are protected;
+- important requested behavior and established contracts are protected against realistic, consequential failures;
-- meaningful boundaries and failure modes are exercised;
+- boundaries and component interactions have coverage where they introduce meaningful risks not protected elsewhere;
-- realistic and consequential regressions are credibly protected against silent recurrence;
-- behavior involving data integrity, destructive operations, compatibility, security, concurrency, idempotency, and recovery is credibly protected;
-- important external boundaries have realistic integration coverage;
-- representative complete workflows are tested;
 - failures provide useful signal rather than redundant noise;
 - legitimate internal changes usually do not require test edits; and
 - additional tests would mostly repeat existing protection or preserve inconsequential implementation details.
 
-Sufficiency is a risk judgment, not a coverage percentage or test count. Reassess it as the application, its users, and the consequences of failure evolve.
+Sufficiency is a risk judgment, not a coverage percentage, test count, or required
-
+mix of testing techniques. Reassess it as the application, its users, and the
-The governing rule is:
+consequences of failure evolve.
-
-> Test heavily where failure is consequential, subtle, or difficult to detect after the fact. Test lightly where failure is obvious, reversible, and inexpensive—and retain no test whose lifetime cost exceeds the confidence it provides.

docs/release.md

@@ -0,0 +1,143 @@
+# Release Procedure
+
+The [release policy](policy/release.md) owns versioning, compatibility,
+publication completion, and immutability. This runbook supplies Scriptorium's
+commands; release notes under `docs/releases/` are historical summaries. The
+[OSS policy](policy/oss.md#discoverability) owns license and attribution
+discoverability requirements.
+
+## Prepare The Candidate
+
+Use a POSIX shell, Git with a configured tagger identity and access to
+`origin`, and a Go toolchain compatible with `go.mod`. The native host must
+support Go's race detector and have its required C compiler. If Git is
+configured to sign tags, its signing tool and key must be available. Run from the
+repository root. Provision the toolchain and module cache before offline
+validation; when dependencies are not cached:
+
+```sh
+GOWORK=off go mod download
+```
+
+Choose an unused stable version under the release policy. Commit its note as
+`docs/releases/<version>.md`, beginning with a title such as
+`# Scriptorium v0.14.0` (an example, not an instruction to select that version).
+Include a concise summary and relevant compatibility impact or upgrade action.
+End the note with the following footer, replacing `<version>` in both absolute
+URLs with the selected version tag (for example, `v0.14.0`):
+
+```markdown
+[LICENSE](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/<version>/LICENSE) | [ATTRIBUTION](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/<version>/docs/oss/attribution.md)
+```
+
+Check that both URLs name files in the candidate tree at that tag. The tag may
+not resolve online until publication. The checked-in note is copied unchanged
+into the hosted release body by the existing workflow, so do not maintain a
+second footer there.
+Update affected canonical documentation with the change, and retire completed
+roadmap material when appropriate while preserving deferred work and links.
+No extra release-specific review signoff is required.
+
+Finish and commit the intended candidate on `main`, then publish that branch:
+
+```sh
+git -c push.followTags=false push origin refs/heads/main:refs/heads/main
+```
+
+The publication command inspects the configured push endpoint of `origin`,
+not a potentially stale remote-tracking ref. If a separate push URL is
+configured, it is authoritative for both checks and publication. Configure one
+publication URL; multiple push endpoints cannot be validated as one remote.
+
+## Publish
+
+Invoke the single [publication command](../scripts/release.sh), substituting
+the selected version:
+
+```sh
+sh scripts/release.sh v0.14.0
+```
+
+The command validates a clean worktree and index on `main`, an unused local and
+remote version, exact agreement with authoritative remote `main`, and a
+checked-in note whose first-level title contains Scriptorium and the exact
+version. Ignored local files do not make the candidate dirty.
+
+The existing source-boundary guards reject committed workspaces, vendor trees,
+and module replacements. No migration-specific exact Promptkit version audit
+is required.
+
+It then runs the complete suite once with the race detector and builds Linux
+amd64 and arm64 binaries using `CGO_ENABLED=0`, `-trimpath`, and
+`-ldflags '-s -w'`. The native test run uses the host platform and enables cgo.
+Validation disables workspaces, uses read-only module mode, and disables module
+and toolchain downloads. Missing dependencies must be provisioned separately;
+fix the environment and rerun the command. No persistent validation cache is
+maintained by the release tool.
+
+The command rechecks candidate and publication state, creates an annotated tag
+from the committed note, and pushes only that tag's exact object to its explicit
+ref. It does not push branches, follow other tags, force updates, or wait for
+CI. Temporary notes and validation builds are removed on exit. The successful
+summary identifies the source commit and tag object and reports binary
+delivery separately as asynchronous and unverified.
+
+## Asynchronous Binary Delivery
+
+The tag-triggered [hosted workflow](../.woodpecker/release.yml) builds and
+publishes:
+
+- `scriptorium-<version>-linux-amd64`;
+- `scriptorium-<version>-linux-arm64`; and
+- `SHA256SUMS`.
+
+The matching checked-in note supplies the hosted release body. The workflow
+owns image selection, packaging, checksum generation, and upload configuration.
+Its upload step skips existing files and does not overwrite the release.
+Source-publication success does not attest to workflow success or asset
+availability.
+
+Workflow inspection, downloads, checksum verification, and a compatible-host
+smoke test are optional delivery diagnostics. They must not delay or redefine
+source-release completion. No polling or consumer-installation check is part
+of the publication command.
+
+## Failure Recovery
+
+Before tag creation, correct and commit a failed candidate, publish `main`,
+and invoke the publication command again. A changed candidate must pass its
+own validation.
+
+After an unsuccessful push, the command queries the authoritative endpoint.
+If it confirms the exact tag object and candidate, it reports source success.
+Otherwise it exits unsuccessfully and preserves the local tag. It never retries
+a push or deletes a tag automatically. If the endpoint is unavailable, the
+publication status is unknown, not evidence that nothing was published.
+
+For manual diagnosis, select the affected version and compare the local tag
+object and peeled commit with the authoritative remote:
+
+```sh
+release_version=v0.14.0
+release_remote=$(git remote get-url --push origin)
+git rev-parse "refs/tags/$release_version" "refs/tags/$release_version^{commit}"
+git ls-remote "$release_remote" refs/heads/main \
+    "refs/tags/$release_version" "refs/tags/$release_version^{}"
+```
+
+Do not retry while the outcome remains unknown. If the tag exists remotely,
+do not move, recreate, or delete it. If the tag was never published or used by
+any release channel, an explicitly authorized local cleanup may delete only
+that unpublished tag; then rerun the command to validate and publish the
+candidate. The command intentionally rejects an existing local tag rather than
+assuming that a previous process validated it.
+
+For transient delivery failures, inspect what has already been uploaded before
+retrying the same immutable tag. The upload step's skip behavior alone does not
+prove checksum consistency. Add missing assets only if they match the tagged
+source and any already-published manifest, without replacing existing contents.
+Compare rebuilt bytes with published checksums when recovering a partial
+upload; do not assume toolchain changes reproduce identical binaries. If safe
+completion is impossible, or published source, notes, packaging, or artifact
+contents need correction, leave the original release intact and publish a new
+version from a corrected commit.

docs/releases/v0.12.0.md

@@ -0,0 +1,36 @@
+# Scriptorium v0.12.0
+
+## Breaking Project Boundary
+
+Scriptorium is now an executable-only CLI and HTTP application. This is a
+breaking change for Go consumers: the former root Go package is not included,
+and no compatibility facade is provided.
+
+Scriptorium `v0.11.1` was the final framework-bearing release. Former Go
+consumers should follow the
+[migration guide](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.12.0/docs/consumers/migrating-to-promptkit.md)
+and adopt
+[Promptkit `v0.1.0`](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.1.0/docs/consumers/pkg-promptkit.md)
+for in-process prompt preparation and execution.
+
+## Application Interfaces
+
+The Scriptorium command-line and HTTP application interfaces remain. Their
+canonical documentation defines the supported commands, configuration,
+requests, responses, operational behavior, and deployment responsibilities:
+
+- [CLI reference](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.12.0/docs/cli.md)
+- [HTTP API reference](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.12.0/docs/api.md)
+- [Configuration reference](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.12.0/docs/config.md)
+- [Operations guide](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.12.0/docs/operations.md)
+
+## Framework Dependency And Consumers
+
+The released Scriptorium binaries use Promptkit `v0.1.0` as their framework
+dependency. Promptkit owns the reusable engine, source formats, profiles,
+generation boundary, and validation contracts. See the
+[Promptkit Go consumer guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.1.0/docs/consumers/pkg-promptkit.md)
+for that supported API.
+
+All known downstream Go consumers were migrated to Promptkit before this
+release.

docs/releases/v0.13.0.md

@@ -0,0 +1,59 @@
+# Scriptorium v0.13.0
+
+## Promptkit v0.9 Adoption
+
+Scriptorium now uses
+[Promptkit `v0.9.0`](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.9.0/)
+and supports the complete Promptkit v0.9 prompt and profile definition format
+through its configured directory sources. This includes prompt versions,
+optional inputs, all supported message roles, cache control, session templates,
+output schemas and repair budgets, profile inheritance, backend selection,
+provider controls, optional credential environment names, and JSON-compatible
+extra parameters.
+
+Promptkit remains the canonical owner of definition parsing and framework
+validation. Scriptorium continues to own its CLI, HTTP, configuration,
+presentation, and deployment contracts.
+
+## Application Features
+
+- `run` and `render` can select an explicit prompt version and can execute
+  prompts that do not declare or reference inputs.
+- CLI and HTTP requests can provide a direct session ID. Reasoning controls can
+  inherit, replace, or explicitly clear the selected profile value.
+- Application configuration can register custom OpenAI-compatible backends
+  with optional credential environment names, extra parameters, concurrency
+  limits, and queue policy.
+- `inspect prompt` and `inspect profile` provide deterministic text or JSON
+  views without invoking a model. Profile inspection does not read credential
+  values or require a prompt definition.
+- Prepared output, CLI summaries, and HTTP metadata report effective backend
+  identity when available.
+- HTTP requests rejected by backend capacity policy return `503` with the
+  stable `capacity_exceeded` code. One server-scoped Promptkit engine enforces
+  those limits across concurrent requests.
+
+See the versioned application contracts for exact behavior:
+
+- [CLI reference](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.13.0/docs/cli.md)
+- [HTTP API reference](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.13.0/docs/api.md)
+- [Configuration reference](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.13.0/docs/config.md)
+- [Operations guide](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.13.0/docs/operations.md)
+- [Promptkit v0.9 format reference](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.9.0/docs/formats.md)
+
+## Compatibility And Operations
+
+There are no intentional removals from the v0.12 application interfaces. The
+Promptkit upgrade does enforce its current definition-safety rules, including
+supported message roles, absolute HTTP or HTTPS endpoints, contained content
+and schema paths, bounded repair budgets, and JSON-compatible extra parameters.
+Definitions rejected by these rules must be corrected before use.
+
+Credential values remain outside configuration, definition files, CLI flags,
+and HTTP payloads. Named environment sources are optional unless a selected
+Promptkit profile explicitly requires a key. A positive repair budget permits
+additional provider calls and can increase latency, token use, and cost.
+
+The HTTP service retains only the shared operational state needed for backend
+admission and in-flight request handling. Scriptorium does not retain durable
+conversation, workflow, checkpoint, or resume state.

docs/releases/v0.14.0.md

@@ -0,0 +1,66 @@
+# Scriptorium v0.14.0
+
+This minor release adopts Promptkit v0.11.0 and ConfigKit v0.4.0, adds
+application-configuration inspection, and exposes request retry controls,
+whole-run deadlines, and optional terminal execution reports.
+
+## Configuration migration
+
+Scriptorium now uses ConfigKit for application configuration. This intentionally
+changes accepted input and precedence:
+
+- An existing empty file is invalid; use `{}` for an empty mapping. Explicit
+  empty strings and zeroes replace lower values, while `null` is accepted only
+  for nullable fields. `--config ''` is invalid. An explicitly empty server
+  address reaches the standard HTTP server rather than restoring `:8080`.
+- YAML decoding is stricter: unknown fields, additional documents,
+  anchors/aliases, unsupported scalar forms, and other inputs rejected by
+  ConfigKit now fail. The `configkit` key is reserved, and ConfigKit's source
+  and resource limits apply. Backend parameter integers use its `int64` shape.
+- File-backed configurations can explicitly import path or glob fragments and
+  select one named overlay with `--config-overlay`. These files stay under the
+  selected configuration file's canonical directory. Application path *values*
+  remain relative to the process working directory. Only explicitly supplied
+  application CLI flags override file or overlay settings.
+
+Use `config validate`, `config show`, `config sources`, and `config explain` to
+inspect application settings without creating an engine or contacting a model.
+Validation is not a provider probe or complete Promptkit definition check;
+effective output is not guaranteed reloadable. Inspection keeps ordinary
+`extra_params` values, including historical values, and `api_key_env` reference
+names visible. Keep secrets out of parameters and protect inspection output;
+actual API-key values remain with Promptkit and are never resolved by ConfigKit.
+Request retry overrides and Promptkit credential requirements are separate
+from application configuration.
+
+## Promptkit and execution changes
+
+Promptkit v0.11.0 uses its `/v2` catalogs. The `deepseek-3-2`,
+`deepseek-4-flash`, and `deepseek-4-pro` profile IDs are removed without aliases;
+select an available catalog profile, a maintained Promptkit profile, or a
+complete application-owned profile.
+
+Promptkit's built-in transient retry default is two additional attempts. This
+can increase provider calls, latency, and cost; an application or request
+retry override of zero disables additional attempts. Repair generations have
+their own retry budgets. Generation timeouts apply per attempt. CLI
+`--run-timeout` and HTTP `run_timeout_seconds` add optional whole-run deadlines;
+an expired HTTP execution returns `504 deadline_exceeded`, caller cancellation
+returns `408 request_canceled`, and a live-context provider-attempt failure
+remains a 502 response.
+
+CLI `--execution-report` and HTTP `include_execution_report` expose optional
+terminal reports. Reports are absent when no terminal observation exists, can
+contain sensitive identifiers, and do not replace result usage. CLI report
+writes are separate and nontransactional; HTTP report bytes count toward the
+response-size limit.
+
+For complete behavior, see the
+[CLI](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.14.0/docs/cli.md),
+[configuration](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.14.0/docs/config.md),
+[HTTP API](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.14.0/docs/api.md),
+and [operations](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.14.0/docs/operations.md)
+references. The repository now includes
+[dependency attribution and license texts](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.14.0/docs/oss/attribution.md).
+
+[LICENSE](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.14.0/LICENSE) | [ATTRIBUTION](https://gitea.maximumdirect.net/eric/scriptorium/src/tag/v0.14.0/docs/oss/attribution.md)

docs/roadmap/configkit.md

@@ -0,0 +1,231 @@
+# ConfigKit Adoption
+
+## Status And Intent
+
+Implemented feature direction, drafted on 2026-09-26 and delivered through the
+[implementation plan](implementation.md). This roadmap records the target
+behavior and changes from the reviewed baseline; the implementation plan owns
+sequencing, concrete interfaces, and verification evidence.
+
+The user is adopting ConfigKit across an application suite to standardize
+configuration semantics. Scriptorium will make a clean cutover to ConfigKit's
+native conventions, including intentional breaking changes. Preserving the
+legacy loader's behavior is not a goal: there will be no parallel legacy loader,
+compatibility mode, or recreation of the old merging rules.
+
+Alignment applies to application configuration, not to Promptkit-owned prompt,
+profile, or schema definitions. Departures from ConfigKit conventions require an
+application-specific reason or a genuine ownership boundary, not backward
+compatibility alone. The [architecture policy](../policy/architecture.md) and
+[ADR 0004](../adr/0004-definition-boundary.md) remain the scope boundaries.
+
+## Reviewed Baseline (Historical)
+
+Scriptorium consumes Promptkit v0.11.0. Its `internal/config` package uses
+yaml.v3 directly and manually applies defaults, file settings, and CLI overrides.
+It has a parser-specific integer decoder, ignores empty string overrides, and
+treats an empty configuration file as defaults-only input. It has no application
+configuration imports, selected overlays, or provenance/inspection interface.
+The [configuration reference](../config.md), [CLI reference](../cli.md), and
+[source internals](../internal/sources.md) own the current behavior.
+
+The reviewed ConfigKit release is v0.4.0 at commit
+`e6ced0d3d1194b58e0b3dc8970089471ba175258`. Adopt that published release as the
+initial target, rather than a sibling checkout or unpublished replacement.
+Its canonical references are:
+
+- [Configuration contract](https://gitea.maximumdirect.net/eric/ConfigKit/src/commit/e6ced0d3d1194b58e0b3dc8970089471ba175258/docs/config.md).
+- [Consumer adoption guide](https://gitea.maximumdirect.net/eric/ConfigKit/src/commit/e6ced0d3d1194b58e0b3dc8970089471ba175258/docs/consumers/README.md).
+- [Release notes](https://gitea.maximumdirect.net/eric/ConfigKit/src/commit/e6ced0d3d1194b58e0b3dc8970089471ba175258/docs/releases/v0.4.0.md).
+
+ConfigKit requires Go 1.25, within Scriptorium's existing toolchain requirement.
+It selects `go.yaml.in/yaml/v4 v4.0.0-rc.6`. Removing Scriptorium's direct parser
+usage does not remove yaml.v3 from the dependency graph: Promptkit still uses it.
+The initial review passed ConfigKit's default test suite and Scriptorium's
+configuration and CLI tests; that is baseline evidence, not migration validation.
+
+## Target Ownership And Loading Model
+
+| Owner | Responsibility |
+| --- | --- |
+| ConfigKit | Application YAML policy, source acquisition, composition, overlays, typed decoding, explicit override application, provenance, and redacted inspection. |
+| Scriptorium | Source discovery, application schema and defaults, CLI parsing, recorded application normalization, semantic validation, command prerequisites, and runtime conversion. |
+| Promptkit | Framework definition formats, backend semantics, credential lookup, engine defaults, and prompt execution. |
+
+`internal/config` becomes a small application-specific ConfigKit integration,
+not a second general-purpose configuration framework. Execution and inspection
+share one configuration definition and loading pipeline. Defaults, selected base
+and imports, selected overlay, and explicit application CLI overrides participate
+in ConfigKit's lifecycle; resolution and validation follow its upstream rules.
+Normalization that changes inspected values is recorded through its resolver.
+Runtime conversion does not perform a hidden second merge or apply new defaults
+after the inspection snapshot has been created.
+
+Scriptorium retains its application field names and domain meanings unless a
+specific change below requires otherwise. ConfigKit's public root API replaces
+direct YAML decoding and parser-specific hooks. Application defaults remain
+Scriptorium-owned; omitted framework settings still delegate to Promptkit.
+Backend conversion retains deterministic registration and engine-scoped shared
+capacity state. This work does not change the HTTP request contract or move
+configuration loading into each HTTP request.
+
+## Native Configuration Semantics
+
+The target accepts ConfigKit's upstream YAML grammar, schema binding, limits,
+composition, and value-presence rules without a legacy preprocessing layer.
+Migration-visible changes include:
+
+- An existing empty file is invalid; `{}` expresses an empty application mapping.
+  Defaults-only operation with no discovered file uses `NoSource` instead.
+- Explicit empty strings, false values, and zeroes replace defaults. They are
+  not silently treated as omission. Application validation still decides whether
+  a resulting value is meaningful for its field or selected command.
+- Null follows the application's declared nullable types. It is not a universal
+  spelling for omission. Scalars and structs do not accept null merely because
+  the former parser tolerated it.
+- Anchors, aliases, merge keys, explicit tags, additional documents, unsupported
+  scalar spellings, and coercions rejected by ConfigKit are rejected here too.
+- ConfigKit's reserved `configkit` key and resource limits apply, including in
+  dynamic application data. These constraints do not apply to independently
+  loaded Promptkit definitions or HTTP request bodies.
+- Dynamic integers in backend `extra_params` use ConfigKit's `int64`
+  representation. Runtime mapping preserves their supported value semantics
+  rather than reserializing through YAML or demanding the old Go scalar type.
+
+Presence remains meaningful at the framework boundary: omitted/null
+`transient_retries` delegates to Promptkit, while explicit zero disables retries;
+omitted backend queue capacity differs from explicit zero. Application HTTP
+size defaults and zero-as-unlimited behavior remain. No new value ranges or
+backend restrictions are introduced merely to adopt the library.
+
+## Discovery, Imports, Overlays, And Paths
+
+Source discovery remains Scriptorium-owned. The target retains the documented
+explicit `--config` selection and ordered system-location search. An explicitly
+empty config path is invalid rather than an implicit request for a default file.
+If neither implicit candidate exists, loading uses defaults only; a selected
+file that fails loading is not silently replaced with defaults. No implicit
+working-directory configuration search, environment overlay, or directory scan
+is added.
+
+Application configuration supports ConfigKit's explicit path and glob imports.
+Imports compose disjoint definitions; repeated non-mapping definitions are
+conflicts, not last-writer-wins overrides. There is no implicit `conf.d` scan.
+
+An optional `--config-overlay` selects ConfigKit's one named overlay using its
+standard `overlays/<name>.yml` location, naming rules, and merge behavior. No
+overlay is selected by default. Selecting an active overlay without a base
+source follows ConfigKit's rejection of overlays with `NoSource`; Scriptorium
+does not invent a root. Application overlays do not replace `--profile`,
+`profile_dir`, or Promptkit's execution-profile selection.
+
+Use the selected file's canonical directory as ConfigKit's default import and
+overlay root. This root governs configuration source traversal only. Values of
+`prompt_dir`, `profile_dir`, `schema_dir`, and `server.artifact_root` retain
+working-directory-relative interpretation; absolute values remain absolute.
+This is an explicit application path policy, not an upstream requirement or a
+legacy parsing mode. ConfigKit's consumer examples demonstrate alternatives but
+do not mandate source-file-relative application paths. This adoption does not
+extend import containment to application data or alter HTTP artifact containment.
+
+## CLI Overrides And Configuration Inspection
+
+Only flags explicitly supplied by the user become ConfigKit application
+override records. Parser defaults do not overwrite file or overlay settings.
+Explicit empty values are not dropped. The existing invocation-specific prompt,
+profile, input, model, timeout, output, and reporting options remain invocation
+state rather than new application configuration fields. In particular, the
+run/render retry flag remains a request override; it does not mutate the engine's
+application retry setting or backend state.
+
+Expose application configuration validation, effective redacted YAML, source
+provenance, and explanation of an individual configuration path. These are
+included features, not merely library capabilities available for future work.
+They use ConfigKit diagnostics and inspection records from the shared loading
+pipeline, including defaults, imports, overlays, explicit CLI values, and
+recorded normalization. No separate inspection-only interpretation is maintained.
+
+Configuration inspection does not execute prompts, make provider calls, or
+resolve API-key values. Application validation is not a promise that every
+Promptkit backend or definition is valid or that a provider is reachable.
+Command-specific execution prerequisites remain with the relevant command;
+inspection can explain an incomplete application configuration without requiring
+an executable prompt selection. The interface is a CLI configuration command
+family, not a second CLI framework or an HTTP configuration endpoint; the
+implementation plan specifies its concrete commands and mappings.
+
+Safe diagnostics must not restore raw parser errors or configuration values
+that ConfigKit deliberately suppresses. Effective output and explanation use
+the upstream redacted renderers; they are inspection output, not guaranteed
+reloadable configuration. Under the maintainer's selected policy, backend
+`extra_params` are visible in effective output and explanation, including
+historical values. There is no blanket container masking, sensitive-key heuristic,
+or new selective-redaction configuration surface.
+
+## Credential Boundary And Deferred Features
+
+Existing `api_key_env` values remain environment-name strings passed to Promptkit.
+They do not become ConfigKit `Secret` fields. ConfigKit eagerly resolves effective
+typed references and requires nonempty values; that would change Promptkit's
+optional/required and selected-credential behavior. This departure from the
+secret-reference feature is an ownership decision, not compatibility plumbing.
+Raw API-key fields remain unsupported under the existing architecture policy.
+
+API-key values are the only secrets requiring ConfigKit redaction in this
+adoption. The application configuration holds environment-variable names, not
+those values, so inspection neither resolves nor contains the actual keys.
+Reference names remain visible. Do not tag `api_key_env` as secret merely to
+hide its name, add an eager key lookup, or mask unrelated application settings.
+The existing raw-key prohibition and Promptkit boundary provide the protection
+without introducing a redundant credential-bearing configuration field.
+
+Secrets-directory bootstrap and application schema versioning are deferred until
+there is a concrete application need. Their availability in ConfigKit does not
+make them mandatory. Hot reload, runtime resource replacement, remote imports,
+automatic migrations, and general environment-variable overlays are outside
+this adoption. These are scope limits for this feature, not new permanent
+prohibitions on future explicitly requested work.
+
+## Required Changes And Completion Criteria
+
+- Replace manual decoding/default/override machinery with the shared ConfigKit
+  integration and retain only application-specific discovery, rules, and mapping.
+- Support imports and selected overlays across commands that load application
+  configuration, and deliver the configuration inspection capabilities above.
+- Update application configuration types, presence handling, CLI explicit-set
+  mapping, and diagnostics to match the selected native semantics.
+- Update maintained examples and canonical configuration, CLI, operations,
+  architecture, and internal documentation when behavior lands. Upstream generic
+  contracts remain linked rather than copied into a competing specification.
+- Add proportionate integration coverage for the cutover: defaults-only input,
+  explicit values and nulls, imports/conflicts, overlays, CLI precedence,
+  inspection agreement and API-key non-disclosure, visible dynamic backend
+  parameters, unchanged credential ownership, and representative
+  execution/server startup.
+  ConfigKit owns exhaustive parser and composition tests; Scriptorium tests its
+  adoption and application boundaries.
+- Pin the published dependency and maintain ConfigKit and YAML attribution under
+  the [OSS policy](../policy/oss.md), using imported-commit source/notice links
+  and applicable standard and companion license texts.
+- Document migration in a release appropriate for the intentional breaking
+  configuration changes under the [release policy](../policy/release.md).
+  Release selection and publication remain separate preparation work; this
+  roadmap adds no release gate, network probe, or new distribution format.
+
+Completion means one ConfigKit-native application configuration path serves
+execution and inspection, the selected user-facing features work, and migrated
+examples and regression coverage demonstrate the documented semantics. It does
+not require adopting every ConfigKit feature or changing Promptkit definitions.
+
+## Resolved Inspection Policy
+
+On 2026-09-26 the maintainer selected no redaction for `extra_params` and limited
+the relevant secret to the API key. Inspection therefore preserves parameter
+values and environment-reference names, while actual API-key values remain
+outside the application configuration pipeline. Visibility is intentional;
+this is not a promise to detect secrets placed inside arbitrary parameter values.
+
+The delivered `config show` and `config explain` commands use ConfigKit's
+inspection writers without secret tags or a second redaction path. Both
+effective and historical parameter values remain visible; `api_key_env` names
+remain visible while Promptkit alone resolves selected credential values.

docs/roadmap/implementation.md

@@ -1,90 +1,536 @@
-# Step 5 Implementation Record
+# ConfigKit Adoption Implementation Plan
 
-## Status
+## Status, Authority, And Historical Plans
 
-Complete as of 2026-07-28.
+Planned on 2026-09-26 against Scriptorium commit
+`43eea5c7c41d2a8134b3dece60f3af5c98b8fd1c`. This document records the
+ordered implementation and its completion evidence. The maintainer resolved
+the inspection-policy question:
+`extra_params` remain visible; only API-key values require secret protection.
 
-This record summarizes the completed implementation of
+The [feature roadmap](configkit.md) owns scope, target behavior, and user intent.
-[Migration Step 5: Promptkit Repository Foundation](step5.md). The
+This plan owns implementation steps and the interface choices needed to execute
-[main migration roadmap](migration.md) owns the continuing cross-repository
+them. Read [development](../development.md) and every policy before work:
-sequence.
+[agents](../policy/agents.md), [architecture](../policy/architecture.md),
+[documentation](../policy/documentation.md), [testing](../policy/testing.md),
+[release](../policy/release.md), and [OSS](../policy/oss.md).
+[ADR 0004](../adr/0004-definition-boundary.md) continues to govern Promptkit's
+definition boundary. Do not rewrite accepted ADR decisions.
 
-## Completed Work
+This filename previously contained completed Promptkit plans. Older roadmap
+links to this file refer to these historical records, not the ConfigKit stages:
 
-### Validation And Release Decision
+- Completed v0.11 implementation and release handoff:
+  `git show 43eea5c7c41d2a8134b3dece60f3af5c98b8fd1c:docs/roadmap/implementation.md`.
+- Completed v0.9 implementation:
+  `git show e4405966c87c8a7843b340146e90cc1e515bef42:docs/roadmap/implementation.md`.
 
-- Added accepted
+Those deliveries must not be repeated or lost from upcoming release preparation.
-  [ADR 0003](../adr/0003-use-maintainer-run-validation-and-tag-only-releases-for-promptkit.md)
+These Git records are available locally without publishing the recent commits.
-  for maintainer-run Promptkit validation and source-and-tag releases.
-- Preserved accepted
-  [ADR 0002](../adr/0002-split-promptkit-from-scriptorium.md) and its repository
-  split, ownership, independent versioning, and release-order decisions.
-- Reconciled the migration roadmap so Promptkit validation no longer depends on
-  hosted CI or binary packaging.
 
-### Promptkit Module And License
+## Working Rules And Selected Design
 
-- Created module `gitea.maximumdirect.net/eric/promptkit` at Go `1.25.5`.
+The dependency target is `gitea.maximumdirect.net/eric/ConfigKit v0.4.0`,
-- Added the root `promptkit` package as the only implemented Go package.
+commit `e6ced0d3d1194b58e0b3dc8970089471ba175258`. Use its public root package,
-- Kept the module dependency-free and added no placeholder implementation.
+imported as `configkit`. The roadmap links the exact upstream contracts.
-- Preserved GPLv3 wording and attribution while changing the two template
+Do not opportunistically upgrade Promptkit or other dependencies, commit a
-  example-notice project names to `Promptkit`.
+workspace/replacement, or depend on sibling source at runtime.
-- Confirmed the existing ignore rules cover Go output, editor and operating
-  system artifacts, `.env`, `go.work`, and `go.work.sum`.
 
-### Policies And Architecture
+This is a clean configuration cutover, not a compatibility project. Native
+ConfigKit syntax, presence, nullability, resource limits, and precedence apply.
+Do not add a pre-parser, YAML serialization round trip, alternate merge engine,
+legacy mode, generic provider abstraction, or a new CLI framework.
 
-- Replaced template documentation and architecture material with durable
+Keep application source discovery and domain rules in `internal/config`;
-  library-specific policies.
+CLI parsing/output stays in `internal/adapter/cli`. Promptkit remains responsible
-- Assigned canonical documentation ownership, including conditional ownership
+for prompt/profile/schema parsing, backend semantics, credentials, and engine
-  for public contracts, integrations, internal subsystems, ADRs, roadmaps, and
+behavior. Keep one shared server engine and existing HTTP artifact policy.
-  examples that may exist later.
+No HTTP schema, execution-report, request-timeout, or retry-orchestration change
-- Defined the root facade, internal-package direction, consumer boundary,
+is part of this plan.
-  exported-API discipline, error boundary, dependency injection, and repository
-  independence constraints for future extraction.
-- Updated testing policy for deterministic, offline, parallel-safe,
-  behavior-focused, maintainer-run validation.
-- Recorded the root package as the sole implemented component.
 
-### Orientation, Development, And Releases
+For every stage:
 
-- Rewrote the Promptkit README without claiming unimplemented APIs.
+1. Inspect the working tree and relevant code/tests through the repository's
-- Replaced the contributor guide with task routing, complete local validation,
+   code-discovery guidance. Preserve unrelated changes.
-  focused checks, and safe sibling-repository workflows.
+2. Implement the listed outcome and only supporting refactoring it needs.
-- Added the canonical release procedure for annotated semantic Go module tags,
+   Internal names below are selected implementation guidance, not public APIs
-  validation evidence, publication verification, and consumer release ordering.
+   or immutable package-layout contracts.
-- Added no hosted CI, binary packaging, executable command, or release tag.
+3. Update canonical current-state docs when behavior lands. Until Stage 3 the
+   new loader is internal preparation, not an advertised executable feature.
+   Never claim later stages are implemented.
+4. Run focused tests and the development guide's baseline validation for code
+   changes. Tests stay offline, deterministic, and free of real credentials.
+   Reuse existing coverage rather than cloning ConfigKit's parser test matrix.
+5. Format changed Go files, inspect the diff, validate affected docs/examples,
+   record stage status/evidence here, and commit the coherent unit. Do not push,
+   tag, publish, or add new release gates.
 
-### Cross-Repository Acceptance
+### Application Configuration Definition
 
-Promptkit passed, without an active workspace or local replacement:
+Use a new `Document` type in `internal/config` for the native configuration
+shape. It replaces the old on-disk `Config` after CLI cutover. Keep the familiar
+YAML field names:
 
-```sh
+| YAML path | Go shape | Default and selected meaning |
-go test ./...
+| --- | --- | --- |
-go vet ./...
+| `prompt_dir`, `profile_dir` | `string` | Empty; no source configured. |
-go build ./...
+| `schema_dir` | `string` | Existing schema-directory default. Empty remains empty at the application boundary; Promptkit owns any subsequent framework default. |
-gofmt -l $(git ls-files '*.go')
+| `transient_retries` | `*int` | Nil; omitted/null delegates, zero disables additional attempts. |
-git diff --check
+| `server` | Non-pointer struct | Its children receive typed defaults; null is invalid. |
-```
+| `server.addr` | `string` | Existing listen-address default when absent; explicit empty is passed unchanged to the standard HTTP server, not replaced with the Scriptorium default. |
+| `server.artifact_root` | `string` | Empty; HTTP file input remains disabled. |
+| Three `server.max_*_bytes` fields | `int64` | Existing defaults; explicit zero disables the respective limit; null is invalid. |
+| `defaults` | Non-pointer struct | Contains `render_format`; null is invalid. |
+| `defaults.render_format` | `string` | Existing text default; resolved value must be text or json. Explicit empty is invalid, not defaulted. |
+| `backends` | `map[string]BackendDocument` | Nil; null is permitted, an empty mapping follows ConfigKit semantics. |
 
-Acceptance also verified exact module and package metadata, all maintained
+`BackendDocument` keeps `endpoint string`, `api_key_env string`,
-Markdown links, clean repository hygiene, the Promptkit origin and tracked
+`extra_params map[string]any`, `concurrency_limit int`, and
-default branch, the absence of dependencies and prohibited artifacts, and the
+`queue_capacity *int`. Scalar nulls are invalid; nullable maps/pointers retain
-retained GPLv3 license.
+native semantics. No catalog IDs or Promptkit fields are added.
 
-Scriptorium acceptance confirmed that ADR 0003 and the migration roadmap
+The fresh defaults factory reads existing `internal/defaults` and format
-distinguish Scriptorium's executable CI policy from Promptkit's maintainer-run
+constants, not a duplicated set of literals. Normalization trims surrounding
-checks, preserve the first-tag release gate, and introduce no production code,
+whitespace from application directory strings, artifact root, and server
-module dependency, workspace, or replacement change.
+address; cleans only nonempty application paths; and lowercases/trims
+`defaults.render_format`. Empty paths remain empty: never let
+`filepath.Clean("")` turn disabled/unset into `.`. Record actual changes with
+`configkit.Normalize`, using value-free reasons. Do not normalize backend
+fields or parameter values on Promptkit's behalf.
 
-## Repository Boundaries
+The read-only validator reports negative application size limits, negative
+nonnull application retries, and invalid render format through
+`Validation.Error` at their field paths. It does not print rejected values.
+Do not call the existing format parser's empty-as-default branch for this field.
+Do not add endpoint, backend ID, credential-presence, directory-existence,
+address-format, or positive-only-capacity checks. Existing Promptkit and
+command-specific validation retains those responsibilities where applicable.
 
-Promptkit foundation changes remain in Promptkit's Git history. Scriptorium
+## Stage 1: Add The Dependency And Native Application Definition
-contains only the durable cross-project ADR and migration-roadmap records. No
-tag was created and neither repository was pushed as part of this work.
 
-## Next Work
+**Status: Complete.** The pinned dependency, native definition, focused
+presence/normalization/validation tests, and commit-specific attribution are in
+place. The existing executable loader remains active pending the command cutover.
 
-Migration Step 6 may now extract and stabilize the application-neutral
+Primary files: `go.mod`, `go.sum`, new focused files under `internal/config`,
-framework. It must not update Scriptorium to consume Promptkit until Promptkit
+and `docs/oss/attribution.md`.
-passes its documented validation and publishes its first versioned tag.
+
+1. Add ConfigKit at the selected release. Retain Promptkit v0.11.0 and its
+   selected catalogs. Provision dependencies outside offline test execution.
+   ConfigKit's yaml/v4 release-candidate dependency is the reviewed upstream
+   choice, not an instruction to upgrade its parser independently.
+2. Implement `Document`, `BackendDocument`, the fresh defaults factory,
+   recorded resolver, and read-only validator described above. Keep the old
+   loader operational until Stage 3 so this stage remains independently
+   buildable; this temporary development state is not a shipped compatibility
+   mode or a second user-selectable configuration path.
+3. Test the new definition using real `configkit.Load[Document]` with
+   `Bytes` and `NoSource`. Cover explicit zero/empty/null distinctions,
+   retry/queue nil-versus-zero, safe application validation, and a normalized
+   path whose effective output agrees with the returned value. Include nested
+   unknown fields and a representative dynamic numeric parameter.
+4. Add ConfigKit and yaml/v4 attribution from their selected source material.
+   Resolve the imported yaml/v4 commit from release/module metadata. Preserve
+   actual copyright statements; do not infer a project statement from the
+   FSF license-document copyright. Use applicable SPDX expressions, local
+   standard texts, and commit-pinned upstream license/notice links. Reuse GPL,
+   LGPL, MIT, and Apache texts where applicable, including companion links.
+   Retain yaml.v3 attribution because Promptkit still incorporates it.
+5. Document the internal definition as preparation in the relevant internal
+   guide without claiming the CLI has switched. No current configuration
+   contract changes yet.
+
+Acceptance: the dependency and definition compile, focused tests demonstrate
+native semantics and audited normalization, and attribution follows the OSS
+policy. Existing executable behavior still passes its tests.
+
+## Stage 2: Build Discovery And The Shared Loading Boundary
+
+**Status: Complete.** Ordered source discovery, one ConfigKit load, typed
+diagnostics, and settings conversion are covered by focused file/default and
+override tests. Existing commands still use the old entry point until cutover.
+
+Primary files: `internal/config` and its tests; `docs/internal/sources.md`.
+
+1. Add `LoadOptions` with `Path string`, `Explicit bool`, `Overlay string`,
+   and `Overrides []configkit.Override`, plus
+   `Load(LoadOptions) (*configkit.Result[Document], error)`.
+   Discovery chooses a source; the one ConfigKit call owns actual file reading
+   and decoding. Return the result so consumers retain the frozen inspection
+   snapshot as well as the typed configuration.
+2. With `Explicit=true`, pass the selected path to `configkit.File`;
+   an explicitly empty path is invalid, not implicit discovery or a fallback
+   to the old system filename. Do not silently trim a source filename into a
+   different filename. ConfigKit validates and resolves file sources.
+3. With `Explicit=false`, ignore the option's path value and examine the
+   existing ordered implicit search locations. Only nonexistence permits
+   examining the next candidate. Other stat failures are errors. Select the
+   first existing candidate and let ConfigKit load it. A selected file's later
+   disappearance/read/parse failure does not restart discovery.
+4. If neither implicit candidate exists, use `NoSource`. Initially leave
+   imports disabled and the overlay empty; Stage 4 enables composition.
+   Defaults-only loads still accept explicit application overrides. Never
+   reinterpret an empty file as `NoSource`.
+5. Pass overrides into the ConfigKit call before decoding/validation; do not
+   validate a separately merged lower configuration first. Native parsing and
+   composition failures still follow the upstream lifecycle and are not
+   bypassed by CLI overrides.
+6. Add a small `Settings(Document) AppSettings` conversion for existing
+   executable wiring. It copies resolved fields, maps the already-validated
+   format, and converts the backend map into ID-sorted backend settings.
+   It performs no file IO, normalization, credential lookup, semantic backend
+   checks, or additional defaults. Dynamic values retain their decoded shapes.
+7. Preserve ConfigKit's typed `*LoadError` through wrapping so the CLI can
+   render safe structured diagnostics. Discovery-only errors are concise and
+   quote paths safely; no new public error taxonomy is needed.
+8. Test ordered discovery with temporary paths rather than host system files,
+   explicit missing/empty paths, empty-file rejection versus `{}`,
+   defaults-only loading, source records, override-before-validation behavior,
+   sorted backend conversion, and preservation of zero/nullable values.
+   Remove no existing entry point until all its CLI callers migrate in Stage 3.
+
+Acceptance: real files and defaults-only inputs produce one reusable result,
+runtime conversion agrees with it, and tests do not depend on machine-wide
+configuration or secrets. The old and new internals are temporarily buildable,
+with no new user-visible mode.
+
+## Stage 3: Cut Existing Commands Over And Remove The Legacy Loader
+
+**Status: Complete.** All five command modes use the shared ConfigKit loader;
+the legacy decoder and merge path are removed. CLI and configuration contracts
+now describe native YAML and override behavior. Full test, race, vet, build,
+and diff checks passed.
+
+Primary files: `internal/adapter/cli/run.go`, `inspect.go`,
+`internal/config/config.go`, and associated tests.
+
+1. Route run, render, serve, inspect prompt, and inspect profile through the
+   shared `Load` and `Settings` boundary. Preserve the explicit presence of
+   `--config` in every parser. Centralize the small application-flag mapping
+   rather than reproduce it in each command.
+2. Use `flag.FlagSet.Visit` (or the existing explicit-set helper) to create
+   one `configkit.Override` per explicitly supplied application flag. Use
+   `configkit.Keys`, built-in scalar values, and a safe `Flag` label containing
+   only the flag name. Standard flag parsing's last occurrence supplies the
+   single override; do not emit duplicate records or parser defaults.
+
+   | Flag | Application path | Existing command scope after cutover |
+   | --- | --- | --- |
+   | `--prompt-dir` | `prompt_dir` | run, render, serve, inspect prompt |
+   | `--profile-dir` | `profile_dir` | run, render, serve, inspect profile |
+   | `--schema-dir` | `schema_dir` | run, render, serve |
+   | `--addr` | `server.addr` | serve |
+   | `--artifact-root` | `server.artifact_root` | serve |
+   | `--max-request-bytes` | `server.max_request_bytes` | serve |
+   | `--max-artifact-bytes` | `server.max_artifact_bytes` | serve |
+   | `--max-response-bytes` | `server.max_response_bytes` | serve |
+
+   Register the schema-directory flag on render as well as run/serve so the
+   advertised application path override is consistently usable. This is not a
+   general expansion of runtime/provider flags to other commands.
+3. Keep `--format`, `--out`, request `--transient-retries`, prompt/profile
+   selection, model overrides, timeouts, inputs, variables, and reporting
+   options outside the application configuration tree. In particular,
+   `render --format` overrides that invocation's output format without
+   rewriting `defaults.render_format`; omitted format inherits its resolved
+   application value. Existing invocation-only parsing remains unchanged.
+4. Remove post-load directory trimming/cleaning/defaulting from argument
+   finalizers, including unconditional schema-path cleaning. Keep only
+   invocation-owned transformations such as output-file paths. Explicit
+   empty profile/artifact-root overrides must clear file-provided values;
+   explicit empty prompt directory must reach the existing execution
+   prerequisite rather than revive the lower value.
+5. Keep existing command prerequisites: run/render/serve and prompt inspection
+   need their effective prompt directory as currently required; profile
+   inspection does not acquire a prompt-directory requirement. All commands
+   still perform the common application schema validation. Do not introduce
+   eager filesystem or credential validation for inspection.
+6. Add one CLI diagnostic path using `errors.As` and
+   `configkit.WriteDiagnostics` for load errors. Carry successful load warnings
+   to the command boundary and render them once on stderr before execution or
+   output. Handle diagnostic writer errors as command failures. Do not flatten
+   structured failures into raw parser text or print rejected values.
+   Preserve existing process exit classifications; application/parse/load
+   failures are exit 1, not generated-output validation exit 2.
+7. Remove the old YAML decoder, `strictInteger.UnmarshalYAML`, old on-disk
+   types, `applyConfig`, `ApplyCLIOverrides`, and unused compatibility
+   sentinels/helpers after migrating all callers/tests. Keep only one defaults
+   factory. Remove the direct yaml.v3 import; module tidy may retain yaml.v3
+   as an indirect Promptkit dependency.
+8. Update tests to the deliberate breaking semantics, not the legacy behavior.
+   Protect explicit empty path clearing, scalar-null rejection, unknown fields,
+   rejected empty/multi-document input, one representative YAML policy change,
+   unchanged request-versus-engine retry precedence, absent optional
+   credentials, and command-specific inspection prerequisites.
+9. Update configuration and CLI contracts, source/adapter internals, architecture
+   ownership, and the contributor reading guide for the delivered cutover.
+   Preserve existing application defaults, Promptkit definition support,
+   HTTP containment, shared capacity, and report behavior. Adjust the current
+   CLI claim that every command requires a prompt directory to match actual
+   command-specific requirements.
+
+Acceptance: all existing commands use ConfigKit, no legacy parser or second
+application merge remains, relevant tests pass, and diagnostics and docs describe
+the native breaking behavior. Imports/overlays and new inspection commands are
+not yet advertised.
+
+## Stage 4: Enable Explicit Imports And Selected Configuration Overlays
+
+**Status: Complete.** File-backed loads support explicit imports and one
+selected overlay under the selected file's canonical directory. All five
+existing command modes accept `--config-overlay`; real-file composition and a
+render workflow are tested. The composed example and contracts are updated;
+full test, race, vet, build, and diff checks passed.
+
+Primary files: shared loader, CLI source-selection wiring, configuration and
+CLI tests, maintained configuration examples.
+
+1. Enable `Options.Imports` for file-backed loads. Leave it false for
+   `NoSource`, which rejects imports. Use ConfigKit's default canonical
+   selected-file directory as the root; do not supply a wider filesystem root
+   or add application traversal code.
+2. Wire `LoadOptions.Overlay` into `Options.Overlay`. Register
+   `--config-overlay` on all five existing configuration-loading command
+   modes. Treat the value exactly as an upstream overlay name: no trimming,
+   case folding, extension fallback, path expansion, or local inheritance.
+   Empty and exact lowercase default mean no active overlay under v0.4.0.
+   A requested active overlay without a selected base source fails through
+   ConfigKit; do not manufacture an empty base file or root.
+3. Use native `configkit.imports` directives for explicit paths/globs. The
+   application enables the feature without requiring a second CLI opt-in;
+   absent directives cause no discovery. Retain conflict-based base
+   composition and native overlay replacement/null semantics.
+4. Preserve working-directory-relative application path values even when
+   authored in fragments or overlays. Configuration-source containment is
+   not the HTTP artifact policy and is not applied to prompt/schema paths.
+5. Add focused real-file tests for disjoint backend fragments, an import
+   conflict, overlay replacement, explicit CLI precedence, missing selected
+   overlay, and no-base overlay failure. Verify `--profile` still selects a
+   Promptkit execution profile independently of `--config-overlay`.
+   One real command workflow proves wiring; upstream owns exhaustive glob,
+   symlink, cycle, and parser-limit tests.
+6. Add a small synthetic import/overlay example under `examples/`; preserve
+   a simple single-file quickstart. Update config/CLI contracts and operations
+   guidance for the new features, root selection, and relative-value policy.
+
+Acceptance: supported commands load the same native composition pipeline;
+imports are explicit, overlays remain distinct from execution profiles, and no
+new scanning, remote acquisition, or path policy is introduced.
+
+## Stage 5: Add Application Validation, Effective Output, And Source Inspection
+
+**Status: Complete.** Application-only validation, effective YAML, and ordered
+JSON source inspection use one shared ConfigKit result without an engine. Tests
+cover source composition, CLI provenance, stream failures, and the credential
+reference boundary. Public and internal contracts are updated; full test,
+race, vet, build, and diff checks passed.
+
+Primary files: a focused `internal/adapter/cli/config.go`, shared config
+definition, CLI dispatch/help/tests, and canonical CLI/config documentation.
+
+1. Apply the maintainer's selected inspection policy: no redaction for
+   `extra_params`, including historical values. API-key values are the only
+   relevant secrets, but this schema stores only `api_key_env` reference names.
+   Keep those names visible and never resolve them in the ConfigKit load.
+   Do not add secret tags to the reference name or parameter container, a
+   catch-all secret predicate, sensitive-key guessing, or a selective masking
+   interface. Actual credentials remain with Promptkit; raw API-key fields
+   remain rejected. Use upstream inspection renderers without adding a second
+   value-rendering path or a synthetic credential field.
+2. Add a top-level `config` command family using the existing standard-library
+   flag style. The selected interfaces are:
+
+   | Command | Success stdout |
+   | --- | --- |
+   | `scriptorium config validate [flags]` | Empty; exit status communicates application validation success. |
+   | `scriptorium config show [flags]` | `Result.WriteEffective` redacted YAML. |
+   | `scriptorium config sources [flags]` | One newline-terminated JSON array of source records. |
+   | `scriptorium config explain --path <pointer> [flags]` | Added in Stage 6. |
+
+   These are prospective interface specifications, not commands to execute
+   before their stages are implemented.
+3. All configuration subcommands accept `--config`, `--config-overlay`,
+   and the eight application override flags in Stage 3's table, regardless
+   of which execution command normally uses them. They do not accept request,
+   credential, backend-editing, output-format, or output-file flags. Shell
+   redirection is sufficient for these inspection outputs. No positional
+   arguments are accepted.
+4. Load exactly once through the common loader. Do not construct a Promptkit
+   engine, restricted artifact reader, listener, or client. Missing prompt
+   directories, unselected/absent credentials, and framework backend validity
+   are not additional application-inspection gates. Invalid application
+   types/ranges/format still fail. Validation describes application load
+   validity, not end-to-end executability.
+5. For sources, map `Result.Sources()` to a small local DTO with JSON keys
+   `id`, `label`, `layer` (always present), and `path` (omit when empty).
+   Preserve upstream source order; emit `[]\n` for defaults-only input without
+   overrides. Include synthetic CLI sources where present. Do not marshal
+   opaque ConfigKit implementation objects. The standard JSON encoder escapes
+   control characters; no custom terminal rendering is necessary.
+6. Diagnostics/warnings go only to stderr through the shared diagnostic helper.
+   Successful operations exit 0; parse/load/output/diagnostic-write failures
+   exit 1. No exit 2 meaning is introduced for configuration validation.
+   Ordinary writer failures may leave partial output; do not promise atomic
+   streams or buffering of an entire configuration.
+7. Test defaults-only show/sources, a composed load with CLI provenance,
+   explicit empty clearing, normalized effective values, failed loads producing
+   no successful stdout, and writer failure. Set a synthetic API-key environment
+   variable: effective output must show its reference name, not its value.
+   Repeat with the variable absent to establish that inspection does not require
+   credentials. Assert that ordinary synthetic parameter values remain visible
+   and runtime ExtraParams stay intact; no real environment or provider is used.
+8. Update CLI/config contracts, README navigation, subprocess integration,
+   operations, and internal inventory to describe only these delivered modes.
+   Retain the README's license/attribution ending.
+
+Acceptance: validation, effective output, and source inspection use the same
+resolved configuration as execution, preserve stream separation, and honor the
+selected API-key boundary without masking or changing backend parameter data.
+
+## Stage 6: Add Per-Path Explanation And Verify Credential Boundaries
+
+**Status: Complete.** `config explain` uses required JSON Pointer paths and
+ConfigKit's snapshot renderer, including historical and normalized values.
+Tests cover root, escaped/numeric keys, unknown paths, writer failures, and
+synthetic credential-reference boundaries. Full test, race, vet, build, and
+diff checks passed.
+
+Primary files: configuration command implementation/tests and CLI/config docs.
+
+1. Implement `config explain` with the same selectors and override flags as
+   Stage 5 plus a required, explicitly supplied `--path`. Parse using
+   `configkit.ParsePath`; syntax is JSON Pointer, not dotted notation, a file
+   path, or a URL fragment. Explicit `--path ""` selects the root; an omitted
+   flag is an error. Preserve escaped and numeric mapping-key semantics.
+2. Use the successful shared result's `WriteExplanation`. Explain known
+   effective and historical paths, including removed values. An unknown or
+   malformed path exits 1 with no successful explanation output. Quote
+   user-supplied paths safely if included in application diagnostics.
+   Do not rebuild history, look up environment values, or reload sources.
+3. Keep the upstream human-readable renderer and its redaction semantics rather
+   than inventing a JSON explanation schema or freezing the entire rendered
+   prose as an application guarantee. Writer failures exit 1 and can leave
+   partial output, as with effective output.
+4. Test a value's default/base/overlay/CLI history, recorded normalization,
+   explicit equal-value writes, an escaped backend key, root selection, and
+   an unknown path. Cover a displaced historical backend parameter value:
+   it remains visible, including in a container/root explanation. Use distinct
+   synthetic environment names and key values to verify reference names remain
+   explainable but resolved API-key bytes are absent from all history/output.
+5. Update CLI/config docs and operations guidance with path syntax,
+   historical-value meaning, representation differences, and sensitive
+   identifiers/paths. Do not claim that redaction detects arbitrary secrets
+   outside classified paths.
+
+Acceptance: explain uses the existing snapshot and upstream semantics; its
+history matches the selected inputs and normalization, parameters remain
+visible, and explanation neither resolves nor discloses API-key values.
+
+## Stage 7: Verify Integration, Finish Documentation, And Record Release Handoff
+
+**Status: Complete.** The feature roadmap, command paths, dependency boundary,
+documentation, and attribution were audited. Maintained single-file and
+composed examples passed configuration inspection and no-provider rendering;
+the optional-credential/integer-parameter backend path passed with a local
+provider. The full test, race, vet, build, formatting, link, and diff checks
+passed. Release preparation is recorded below; no tag or publication occurred.
+
+1. Review the feature roadmap against actual code. Confirm all five original
+   command modes and all four new configuration subcommands use one definition
+   and load pipeline. Remove any transitional loader, duplicated defaults,
+   unused compatibility helpers, or post-snapshot configuration mutation.
+   Do not add architecture machinery merely to assert a particular file layout.
+2. Exercise maintained single-file and import/overlay examples through the
+   implemented configuration commands and a no-provider render workflow.
+   Use focused backend integration evidence that dynamic integer parameters
+   reach Promptkit correctly and missing optional credentials retain their
+   established meaning. Use a local HTTP server only where provider serialization
+   must be checked; never a real service or credential.
+3. Retain existing HTTP concurrency, containment, error mapping, retry,
+   timeout, and report tests. Add a representative configuration-to-server
+   wiring test only if existing coverage misses changed settings propagation;
+   do not reproduce all upstream scheduling or HTTP cases.
+4. Run the development baseline on final code: `go test ./...`,
+   `go test -race ./...`, `go vet ./...`, and
+   `go build ./cmd/scriptorium`. Check formatting, affected examples/links,
+   and `git diff --check`. Do not stage the built binary or scratch files.
+   Compare any new standard license text byte-for-byte; preserve upstream
+   whitespace rather than editing license wording to satisfy a style check.
+5. Ensure current configuration, CLI, subprocess, operations, internal docs,
+   contributor routing, and architecture ownership agree. Testing policy
+   should identify ConfigKit as the owner of exhaustive upstream loading tests,
+   while Scriptorium owns application adoption tests. Change policy dates when
+   revising policies, not base versions unless adopting new templates.
+   Keep accepted ADR text and published release notes immutable.
+6. Record the release handoff below and mark only delivered stages complete.
+   Update the feature roadmap's status, including the resolved inspection
+   decision. Preserve deferred work. The next breaking release follows the
+   release policy; version selection, candidate publication validation, release
+   notes at that version, tag creation, and publishing are not this sprint.
+7. Commit the final coherent handoff and report validation evidence, remaining
+   limitations, and any outstanding work without claiming source/binary
+   publication or complete legal compliance.
+
+Acceptance: the ConfigKit-native target is delivered with proportionate
+regression evidence and accurate documentation, and the workspace contains no
+temporary dependency substitutions or uncommitted implementation artifacts.
+
+### Release Handoff To Retain
+
+The upcoming release needs migration guidance for empty files versus `{}`,
+explicit empty values, nullable versus scalar fields, strict YAML/scalars,
+reserved keys and upstream size limits, and the invalid explicit-empty config
+path. Include imports/overlays, application path interpretation, CLI presence,
+inspection command scope, and the selected API-key-only secret policy. Explicit
+empty server address reaches standard HTTP server behavior instead of restoring
+Scriptorium's default; operators should supply their intended listen address.
+
+Keep request retry overrides and Promptkit credential semantics distinct from
+application settings. Explain that configuration validation is not a provider
+probe or complete Promptkit definition validator, and that inspection output
+is not guaranteed reloadable. Include dependency/attribution changes and the
+existing LICENSE | ATTRIBUTION footer. Preserve the still-relevant Promptkit
+v0.11 release handoff identified above when preparing a combined next release.
+
+### Implementation And Release Preparation Record
+
+The ConfigKit v0.4.0 adoption is implemented in committed source. The next
+breaking release still needs version selection, version-matched release notes,
+candidate validation, tagging, and publication under the release policy; none
+has occurred as part of this work. Keep the earlier Promptkit v0.11 handoff
+linked above when preparing a combined release.
+
+The release note should summarize the deliberate configuration migration:
+empty files now fail and `{}` means an empty mapping; explicitly empty strings
+and zero values override lower values; `null` follows declared nullable types;
+strict YAML rejects additional documents, anchors/aliases, unsupported scalar
+forms, and unknown fields; `configkit` is reserved and ConfigKit's source and
+resource limits apply. Explicit `--config ''` is invalid. Imports are opt-in
+per file directive, while `--config-overlay` selects one named overlay under
+the selected file's canonical directory; application path *values* remain
+process-working-directory-relative. Only explicitly supplied application CLI
+flags override configuration. An explicit empty server address is passed to
+the standard HTTP server and does not restore Scriptorium's default.
+
+Document the four application-inspection modes and the selected policy:
+`extra_params`, including history, and `api_key_env` reference names remain
+visible, but actual API-key bytes are never resolved by ConfigKit. Inspection
+output can be sensitive and is not guaranteed reloadable. Application
+validation neither probes a provider nor completely validates Promptkit
+definitions. Keep request retry overrides and Promptkit's credential rules
+separate from application settings. Include the new dependency and attribution
+notices, and retain the existing LICENSE | ATTRIBUTION footer. Deferred
+secrets bootstrap, schema versioning, reload, and remote acquisition remain
+deferred; do not imply source or binary publication has happened.
+
+## Open Questions
+
+None remain for this scope. On 2026-09-26 the maintainer selected no redaction
+for `extra_params` and specified that the API key is the only secret requiring
+ConfigKit redaction. Stages 5–6 implement that decision through visible parameter
+values/reference names and the existing separation of actual credentials from
+application configuration. Do not reopen it or substitute blanket masking.
+
+This does not claim automatic detection of credentials embedded in arbitrary
+strings or provider parameters. The application schema still rejects raw API-key
+fields, and Promptkit remains responsible for resolving named credential sources.

docs/roadmap/migration.md

@@ -1,321 +0,0 @@
-# Promptkit Migration Roadmap
-
-## Status
-
-Accepted plan. Steps 1 through 5 are complete. Steps 6 through 9 remain
-proposed and are not yet implemented.
-
-## Objective
-
-Split the current repository into two projects:
-
-- **Promptkit**: the reusable Go framework, public Go facade, execution engine,
-  source and validation support, OpenAI-compatible client, extension
-  interfaces, and built-in execution-profile registry.
-- **Scriptorium**: a slim runnable application that imports Promptkit and
-  provides the CLI and HTTP interfaces.
-
-Scriptorium will become another downstream Promptkit consumer rather than the
-owner of the framework.
-
-## Compatibility And Migration Policy
-
-This is an intentionally breaking change.
-
-- New and migrated Go consumers must import Promptkit instead of Scriptorium.
-- Scriptorium will not retain type aliases, forwarding packages, deprecated
-  facade APIs, or other source-compatibility shims.
-- Existing consumers may continue using a previously tagged Scriptorium module
-  version until they are migrated.
-- The migration does not need to preserve compatibility between intermediate
-  development states. Each completed phase must instead leave the affected
-  repository internally consistent and tested.
-- Promptkit should initially preserve the useful shape and behavior of the
-  current public Go facade where doing so reduces extraction risk. Broader API
-  redesign should follow the split unless required to establish the new
-  boundary.
-
-## Target Ownership
-
-Promptkit should own application-neutral framework behavior:
-
-- public engine, request, result, option, extension, and error APIs;
-- prompt-definition loading and rendering;
-- execution profiles, overlays, and the built-in profile registry;
-- artifact-loading interfaces and general-purpose `file` and `inline` support;
-- schema loading and output validation;
-- LLM client boundaries and the OpenAI-compatible implementation;
-- preparation and execution orchestration;
-- framework and execution defaults.
-
-Scriptorium should own executable and transport concerns:
-
-- the `scriptorium` command and its `run`, `render`, and `serve` interfaces;
-- CLI parsing, output formatting, exit codes, and process behavior;
-- application-config discovery and CLI precedence;
-- HTTP routing, request and response DTOs, limits, and error/status mapping;
-- HTTP artifact-root and deployment security policy;
-- server and adapter defaults;
-- executable examples, operations guidance, and transport documentation.
-
-The intended dependency direction is:
-
-```text
-Scriptorium CLI and HTTP adapters
-                |
-                v
-             Promptkit
-                |
-                v
-     consumer-supplied sources and clients
-```
-
-Scriptorium must use Promptkit's public API. It must not depend on Promptkit
-implementation packages or reproduce framework orchestration.
-
-## Migration Steps
-
-### Step 1: Refresh And Synchronize Documentation
-
-Perform a repository-wide documentation refresh before migration development.
-
-At minimum:
-
-- reconcile all current-behavior documentation with the code, tests, examples,
-  defaults, and current public contracts;
-- introduce the planned documentation-policy updates;
-- establish an architecture decision record policy and canonical ADR location;
-- resolve stale, duplicated, or misplaced material;
-- validate documentation links and maintained examples;
-- leave future migration behavior in `docs/roadmap/` until implemented.
-
-**Gate:** Do not begin architectural migration work until the documentation
-refresh and policy updates are merged and the repository has an agreed,
-accurate baseline.
-
-**Gate status:** Complete as of 2026-07-26. The completed documentation
-refresh, follow-up verification, and layered-timeout correction remain recorded
-in repository history. Step 1 remains complete after that validation.
-
-### Step 2: Record The Architectural Decision And Detailed Boundary
-
-Create an ADR, under the policy established in Step 1, that records:
-
-- the decision to split Promptkit from Scriptorium;
-- the target ownership and dependency direction;
-- the selected Promptkit repository and Go module paths;
-- the breaking-change and versioning policy;
-- ownership of configuration fields and defaults;
-- artifact-reader and HTTP containment responsibilities;
-- local multi-repository development and release coordination;
-- documentation ownership after the split.
-
-Use the ADR to resolve any remaining public-boundary decisions before code is
-moved.
-
-**Gate:** The ADR is accepted, and every existing package, public contract,
-configuration category, and maintained asset has a target owner.
-
-**Gate status:** Complete as of 2026-07-26.
-[ADR 0002: Split Promptkit From Scriptorium](../adr/0002-split-promptkit-from-scriptorium.md)
-is accepted and records the required ownership and coordination decisions.
-
-### Step 3: Characterize Existing Framework Behavior
-
-Strengthen or add contract-focused tests where needed so extraction can be
-verified without relying on package placement.
-
-The completed Step 3 gate records the accepted implementation scope and
-intended completion state.
-
-Preserve coverage of:
-
-- `Prepare` and `Run` behavior;
-- prompt, profile, execution-default, and request-override precedence;
-- presence-aware numeric overrides;
-- built-in profile fallback and custom-profile overlays;
-- strict YAML and JSON decoding;
-- prompt, profile, schema, and artifact source behavior;
-- structured-output requests and output validation;
-- validation failures versus validation runtime errors;
-- secret handling and redaction;
-- public error classification;
-- HTTP artifact restrictions and transport mappings.
-
-**Gate:** Current framework and adapter contracts are represented by passing
-tests sufficient to detect behavioral regressions during the split.
-
-**Gate status:** Complete as of 2026-07-27. The framework contract corpus,
-public `Engine` characterization, ownership audit, full test and vet suites,
-temporary executable build, and maintained offline examples passed. Step 4 is
-next.
-
-### Step 4: Make Scriptorium Adapters Consume The Public Facade
-
-Within the current repository, refactor the CLI and HTTP adapters to use the
-public framework facade rather than constructing or importing internal runner
-components directly.
-
-Add only the minimum public capabilities needed to support this boundary. These
-may include:
-
-- a small `Run`/`Prepare` consumer interface;
-- injectable artifact-reading behavior for Scriptorium's restricted HTTP
-  policy;
-- source options currently available only through internal constructors;
-- prepared-run formatting based on public types;
-- stable public error classification required by CLI and HTTP mappings.
-
-Do not broadly export internal repositories, domain types, or use-case
-implementations.
-
-**Gate:** The CLI and HTTP adapters use only the public framework API for
-framework behavior, and all tests and documented smoke commands pass.
-
-**Gate status:** Complete as of 2026-07-28. CLI `run`, `render`, and `serve`,
-the HTTP handler, and prepared-run formatting use the public facade; the
-restricted HTTP reader is injected through the public extension point. The
-post-implementation public-error, deterministic MIME, and recursive
-dependency-guard corrections passed full tests, vet, build, race checks,
-maintained examples, and configuration smoke checks. Step 5 repository
-creation is next.
-
-### Step 5: Create The Promptkit Repository
-
-Promptkit was established as an independent repository and Go module through
-the out-of-band workflow recorded in the
-[Step 5 completion record](step5.md). Its foundation includes:
-
-- confirmed repository access, governance, origin, and default-branch tracking;
-- module `gitea.maximumdirect.net/eric/promptkit` at Go `1.25.5`;
-- a minimal root `promptkit` public package boundary with no placeholder
-  framework packages;
-- library-specific development, architecture, documentation, testing, and
-  release policies;
-- documented maintainer-run test, vet, build, formatting, documentation-link,
-  and repository-hygiene validation;
-- source-commit and semantic Go module tag releases without runnable binaries
-  or binary packaging; and
-- temporary workspace and uncommitted replacement workflows for coordinated
-  development without committed repository coupling.
-
-[ADR 0003](../adr/0003-use-maintainer-run-validation-and-tag-only-releases-for-promptkit.md)
-records the controlling Promptkit validation and release decision.
-
-**Gate status:** Complete as of 2026-07-28. Promptkit passed its documented
-validation independently, all maintained links and repository-hygiene checks
-passed, and no workspace, replacement, CI configuration, binary, tag, command,
-or placeholder package was added. Framework extraction and stabilization in
-Step 6 is the next gate.
-
-### Step 6: Extract And Stabilize Promptkit
-
-Move the application-neutral framework and built-in profile assets into
-Promptkit. Preserve implementation packages as internal where practical.
-
-The initial public API should remain focused on the established engine workflow
-and the source and client extension points required by real consumers. Avoid
-combining the extraction with unrelated API redesign.
-
-Move or recreate the relevant:
-
-- framework implementation;
-- public package tests and framework contract tests;
-- built-in profile assets and registry tests;
-- Go consumer examples;
-- framework, consumer, configuration-format, and integration documentation.
-
-Verify that Promptkit can be built, tested, and consumed independently of the
-Scriptorium repository.
-
-**Gate:** Promptkit independently provides the agreed framework contract,
-passes its documented validation, and has published its first versioned tag
-before Scriptorium or another consumer adopts it, as required by
-[ADR 0003](../adr/0003-use-maintainer-run-validation-and-tag-only-releases-for-promptkit.md).
-
-### Step 7: Slim Scriptorium And Adopt Promptkit
-
-Update Scriptorium to import the tagged Promptkit module and remove the
-framework implementation and public Go facade that Promptkit replaces.
-
-Retain only Scriptorium-owned executable and transport behavior. In particular:
-
-- wire CLI and HTTP requests through Promptkit's public API;
-- keep application config and transport defaults in Scriptorium;
-- keep restricted HTTP artifact policy in Scriptorium while injecting it
-  through Promptkit's supported boundary;
-- remove obsolete framework packages, tests, and documentation;
-- update Scriptorium examples and docs to describe the CLI and HTTP application;
-- direct Go framework consumers to Promptkit without providing compatibility
-  aliases or forwarding APIs.
-
-**Gate:** Scriptorium builds and passes all tests using a tagged Promptkit
-dependency, contains no duplicate framework implementation, and its current
-documentation describes only the slimmed application.
-
-### Step 8: Migrate Downstream Consumers To Promptkit
-
-Inventory downstream Go consumers and migrate each from the Scriptorium package
-to Promptkit. This work may occur in external repositories and must be tracked
-explicitly.
-
-For each consumer:
-
-- update module imports and dependencies;
-- adapt to any intentionally changed public API;
-- run its tests and relevant integration or smoke checks;
-- confirm configuration, source, validation, and error behavior;
-- release or deploy the migrated consumer through its normal process.
-
-Consumers that cannot migrate immediately may remain pinned to the last
-framework-bearing Scriptorium tag. No compatibility work is required in the new
-Scriptorium project for those consumers.
-
-**Gate:** All in-scope downstream consumers are either migrated and verified or
-explicitly recorded as remaining on the previous Scriptorium version with an
-owner and follow-up plan. Do not declare the ecosystem migration complete until
-the required out-of-band consumer changes are confirmed.
-
-### Step 9: Complete Release And Documentation Cutover
-
-Complete the coordinated project transition:
-
-- publish Promptkit before dependent Scriptorium releases;
-- release the breaking Scriptorium version against the tagged Promptkit
-  dependency;
-- publish migration guidance that maps the former Scriptorium Go API to
-  Promptkit;
-- update cross-project links, examples, package documentation, and release
-  notes;
-- verify that no release artifact depends on local workspaces or replacements;
-- archive completed roadmap material according to the documentation policy in
-  effect at that time.
-
-**Gate:** Promptkit and Scriptorium are independently releasable, their
-documentation has distinct and accurate ownership, and the migration status of
-all identified downstream consumers is recorded.
-
-## Cross-Cutting Constraints
-
-- Preserve the invariant that execution orchestration remains narrow and
-  application-neutral.
-- Keep adapter-specific decisions out of Promptkit.
-- Keep Scriptorium dependent only on Promptkit's supported public API.
-- Preserve strict external decoding, error classification, validation
-  semantics, and secret redaction throughout the migration.
-- Keep each repository buildable and testable at merged phase boundaries.
-- Coordinate cross-repository changes through tagged dependencies and explicit
-  gates rather than assuming atomic commits across repositories.
-- Document only implemented behavior outside roadmap files.
-
-## Completion Criteria
-
-The migration is complete when:
-
-- Promptkit is the independent owner of the reusable framework and built-in
-  profiles;
-- Scriptorium is a slim CLI and HTTP consumer of Promptkit;
-- Scriptorium no longer exposes or maintains the former public Go framework;
-- all required downstream migrations and external repository work have been
-  completed or explicitly dispositioned;
-- both repositories build, test, document, version, and release independently.

docs/roadmap/policy.md

@@ -0,0 +1,63 @@
+# OSS Policy Adoption
+
+## Status
+
+Completed on 2026-09-26. The upstream template work proposed here is now
+available and adopted locally. This document records the adoption; the
+[OSS policy](../policy/oss.md) is the canonical owner of the ongoing rules.
+
+The adopted baseline is the standard policy repository at commit
+`eea8bcd21a964b395e31971077d7fddb445f2c28`:
+
+- OSS policy base version 1.1;
+- documentation policy base version 1.4; and
+- release policy base version 1.2.
+
+Each affected policy records its base version and local update date. Template
+adoption instructions were removed. Unchanged agent, architecture, and testing
+policies retain their existing versions.
+
+## Adoption Outcome
+
+- [Documentation ownership](../policy/documentation.md) distinguishes the
+  project license, component entries, standard texts, and OSS policy.
+- The [contributor guide](../development.md) routes dependency, copied-asset,
+  attribution, and release-document work to the OSS policy.
+- [Component entries](../oss/attribution.md) cover the six selected direct and
+  transitive Go modules. Source and project-specific notice links identify the
+  imported commits. LGPL entries link directly to both LGPL v3 and GPL v3.
+- Project-specific notices are linked upstream under the adopted house
+  interpretation. YAML's former local LICENSE and NOTICE copies were removed;
+  their history remains in Git. Missing upstream copyright statements are
+  identified in the affected entries rather than fabricated.
+- The five applicable standard texts in `docs/oss/licenses/` match the upstream
+  reference collection byte-for-byte: GPL v3, LGPL v3, Apache 2.0, BSD 3-Clause,
+  and MIT. The reference collection documents their publisher/SPDX provenance.
+  Adoption removed a stray LGPL prefix, restored the complete Apache text,
+  separated the standard BSD text from the Go-specific notice, and added MIT.
+- The [README](../../README.md) ends with friendly project-license and
+  attribution links. The [release policy](../policy/release.md) delegates footer
+  conventions to the OSS policy; the [release procedure](../release.md) retains
+  Scriptorium's immutable-tag URLs and existing hosted-body reuse.
+
+## Preserved Scope
+
+This adoption changes documentation and attribution, not Scriptorium's license,
+dependencies, application architecture, or release machinery. Published notes,
+tags, and assets remain unchanged. Existing source-release completion and
+asynchronous binary-delivery behavior remain intact.
+
+There is no new publication-time network check, approval gate, scanner, source
+bundle, downloadable license asset, or modified-dependency rebuild exercise.
+Concrete exceptions continue to receive the treatment specified by the adopted
+OSS policy; the house format is not a universal legal-sufficiency guarantee.
+
+## Validation
+
+The standard texts were compared against the upstream reference collection.
+The BSD reference intentionally retains its publisher's trailing space in the
+copyright placeholder; it is not reformatted to satisfy a whitespace check.
+Dependency commit references were resolved from Go module origin metadata or
+the selected upstream tag, and affected local links and upstream attribution
+destinations were checked. No runtime code, commands, or executable examples
+changed.

docs/roadmap/promptkit-v0.9.0-adoption.md

@@ -0,0 +1,351 @@
+# Promptkit v0.9.0 Adoption Roadmap
+
+## Status
+
+Complete. This document records the delivered feature scope and targeted end
+state. The completed delivery plan is maintained in
+[implementation.md](implementation.md); current behavior remains defined by
+the canonical application contracts linked below.
+
+The durable product and integration boundary for this work is established by
+[ADR 0004](../adr/0004-definition-boundary.md). This roadmap applies that
+decision to Promptkit v0.9.0 and owns implementation scope and completion
+status.
+
+## Objective
+
+Bring Scriptorium from Promptkit v0.1.0 to v0.9.0 and expose the newer
+framework capabilities that fit Scriptorium's existing CLI, HTTP,
+configuration, presentation, and process boundaries.
+
+Scriptorium must accept the complete Promptkit v0.9.0 feature set expressed by
+directory-backed prompt, profile, and schema definitions. Application adapters
+must not narrow that format contract by requiring request values that the
+selected definition does not require or by omitting selection values needed to
+address a valid definition. Promptkit's tagged
+[framework format reference](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.9.0/docs/formats.md)
+remains canonical; Scriptorium must delegate parsing and framework validation
+rather than reproduce those rules.
+
+The completed application will retain Promptkit as the owner of reusable
+prompt execution, source formats, profiles, backend definitions, capacity,
+inspection, generation, and validation. Scriptorium will continue to own
+application configuration, command and HTTP contracts, error and exit mapping,
+output presentation, and deployment policy.
+
+## Targeted End State
+
+When this roadmap is complete:
+
+- Scriptorium pins the released Promptkit v0.9.0 module without a workspace,
+  replacement, vendored source, direct catalog import, or Promptkit internal
+  import.
+- Existing valid CLI, HTTP, configuration, prompt, profile, schema, and render
+  workflows remain supported subject to Promptkit's documented v0.2.0 through
+  v0.9.0 compatibility corrections.
+- Every Promptkit v0.9.0 prompt and profile feature expressible in definitions
+  under Scriptorium's configured directory sources is usable through the
+  executable application, including prompts with no inputs and explicitly
+  selected prompt versions.
+- CLI and HTTP requests can supply a direct non-secret session ID.
+- HTTP requests and a presence-aware CLI flag can inherit, replace, or
+  explicitly clear reasoning effort.
+- Prepared output, CLI run summaries, and HTTP result metadata expose effective
+  backend identity when Promptkit supplies one.
+- HTTP capacity rejection has a stable Scriptorium-owned overload response.
+- Application configuration can register reusable engine-scoped custom
+  backends, including bounded concurrency and queue policy, for selection by
+  Promptkit profiles.
+- CLI users can inspect prompt and profile definitions without supplying
+  placeholder inputs or invoking a model.
+- Scriptorium's contracts and examples point to Promptkit v0.9.0 and accurately
+  describe its current credential, validation-repair, provider-control,
+  message-role, backend, and source-validation semantics.
+
+## Feature Scope
+
+### Complete Prompt And Profile Definition Compatibility
+
+Scriptorium will treat the tagged Promptkit v0.9.0 format contract as one
+indivisible downstream compatibility boundary. This includes prompt identity
+and version selection, optional and required input declarations, message and
+content-file templates, supported roles, cache control, session templates,
+default profiles, output contracts, schemas, and repair budgets. It also
+includes standalone and inherited profiles, built-in and custom backend
+selection, endpoint overrides, execution controls, optional credential
+environment sources, and JSON-compatible extra parameters.
+
+Most of this support is provided by passing configured prompt, profile, and
+schema directories directly to Promptkit. Scriptorium will not independently
+decode these framework definitions or maintain a field-level subset. Two
+current adapter restrictions must be removed so the executable interfaces do
+not reject definitions that Promptkit accepts:
+
+- `run` and `render` will accept an optional prompt-version flag and map it to
+  `promptkit.RunRequest.PromptVersion`; and
+- `run`, `render`, and `POST /v1/runs` will permit omitted or empty input maps.
+  Promptkit will decide whether an input is required by the selected
+  definition or referenced template.
+
+The HTTP API already carries `prompt_version`; its mapping must remain covered
+by adapter tests. CLI and HTTP callers may continue to supply extra inputs,
+subject to their existing file, containment, and size policies. Removing the
+application-level nonempty-input requirement does not weaken Promptkit's
+declared-required-input or template-reference validation.
+
+Profiles that name built-in backend IDs require no application registration.
+Profiles that name other backend IDs become fully usable through the custom
+backend configuration in this roadmap. Profile inheritance and all other
+profile-field resolution remain Promptkit responsibilities.
+
+This compatibility requirement concerns fields and behavior expressed in
+Promptkit YAML definitions. Go-consumer construction alternatives such as
+single-file sources, injected `fs.FS` sources, in-memory profiles, fallback
+profile filesystems, and prepared-execution handles are library-integration
+features and are not required merely to support the complete definition
+format.
+
+### Promptkit v0.9.0 Compatibility Baseline
+
+Required dependency and source changes:
+
+- update `go.mod` and `go.sum` to select Promptkit v0.9.0 and its selected
+  OpenRouter and Rakestrawhome catalog dependencies;
+- change Scriptorium's inbound HTTP reasoning-effort representation to preserve
+  Promptkit's pointer semantics;
+- retain keyed Promptkit public struct literals and confirm no removed
+  `RunRequest.Metadata` use exists;
+- update tagged Promptkit links and version references throughout Scriptorium;
+  and
+- preserve Scriptorium's architecture guard against replacements, workspaces,
+  vendored Promptkit code, former facade packages, and Promptkit internal
+  imports.
+
+Required compatibility review:
+
+- verify application and maintained example endpoints satisfy Promptkit's
+  absolute HTTP/HTTPS endpoint rules;
+- verify prompt content paths, file artifacts, identities, JSON documents, and
+  JSON-compatible extra parameters satisfy the v0.6.0 safety boundaries;
+- verify maintained prompt roles are limited to `developer`, `system`, `user`,
+  and `assistant`;
+- verify every positive repair budget is no greater than three and is paired
+  with `basic`, `json`, or `json_schema` validation;
+- document that positive repair budgets authorize additional provider calls,
+  latency, token use, and cost;
+- document that unset optional provider controls are omitted and that a zero
+  effective value can represent an unspecified provider control unless an
+  explicit request override supplied it; and
+- update credential guidance for Promptkit's optional environment lookup
+  behavior, profile `api_key_env` semantics, and Scriptorium's prohibition on
+  raw API-key inputs.
+
+### Session And Reasoning Request Controls
+
+The CLI `run` and `render` commands will accept a direct session-ID flag and map
+it to `promptkit.RunRequest.SessionID`. The value remains non-secret
+application correlation metadata and is subject to Promptkit's normalization
+and length rules.
+
+The HTTP run request will accept `session_id` and map it through the existing
+strict DTO boundary. Successful HTTP metadata will report the effective
+session ID when present.
+
+The CLI `run` and `render` commands will also accept a presence-aware reasoning
+effort flag. Omission inherits the selected profile, a nonblank value replaces
+it, and an explicitly supplied empty value clears it. The existing HTTP
+`model.reasoning_effort` field will gain the same three-state behavior while
+remaining a JSON string when present.
+
+These additions must not introduce raw direct API-key flags or fields.
+
+### Backend Identity And Capacity Outcomes
+
+Scriptorium presentation will expose `SelectedBackendID` and the effective
+target's `BackendID` without deriving identity from endpoint text. Backend
+identity will be included where applicable in:
+
+- prepared-run text and JSON output;
+- the CLI run summary; and
+- HTTP response metadata and effective model parameters.
+
+Endpoint-only profiles continue to have no backend ID, and empty identities
+must remain distinguishable from registered built-in or custom backends.
+
+The HTTP adapter will classify `promptkit.ErrCapacityExceeded` separately from
+provider generation failures. The target public outcome is HTTP `503` with a
+stable `capacity_exceeded` code and a generic message. Scriptorium will not
+invent retry timing or expose an untrusted diagnostic. CLI capacity rejection
+continues to be a runtime failure, with a clear safe diagnostic and the
+existing runtime-error exit status.
+
+The HTTP server will use one appropriately scoped Promptkit engine across its
+requests so backend admission, active-generation limits, and queue capacity
+apply across concurrent in-flight work. The server may retain the operational
+state needed for those limits and for request cancellation and lifecycle
+management. This does not create durable per-request, conversation, or resume
+state.
+
+Scriptorium will continue to return generic public model-generation failures.
+Promptkit `GenerationError` provider code, type, and message values will not be
+added to the public HTTP response because they are untrusted and potentially
+sensitive.
+
+### Custom Backend Configuration
+
+The strict Scriptorium application configuration will gain an optional custom
+backend collection. Each entry will support the application-owned mapping
+needed to construct a public `promptkit.Backend`:
+
+- backend ID;
+- OpenAI-compatible endpoint;
+- optional API-key environment-variable name;
+- optional JSON-compatible request-wide extra parameters;
+- non-negative concurrency limit; and
+- queue capacity with presence preserved so omission and explicit zero remain
+  different.
+
+Raw API-key values will remain invalid. Unknown fields will remain errors.
+Configured backends will be registered through `promptkit.WithBackend` during
+engine construction and will be immutable and engine-scoped. Promptkit will
+remain the canonical validator for backend IDs, endpoints, reserved request
+parameters, capacity bounds, duplicate or reserved IDs, environment-variable
+names, and JSON-compatible values. Scriptorium will add context appropriate to
+its configuration error boundary without copying those framework rules.
+
+The collection will be configuration-file-owned. This roadmap does not add
+per-backend CLI flags. Existing endpoint-only profiles remain valid, while
+profiles may select configured custom backend IDs through Promptkit's existing
+`backend` field. Promptkit's built-in OpenRouter and Rakestrawhome backends and
+profiles remain available without Scriptorium registration.
+
+The application configuration shape is a `backends` mapping whose keys are the
+backend IDs registered with Promptkit:
+
+```yaml
+backends:
+  local-gpu:
+    endpoint: http://localhost:11434/v1
+    api_key_env: LOCAL_GPU_API_KEY
+    extra_params:
+      provider_option: enabled
+    concurrency_limit: 2
+    queue_capacity: 0
+```
+
+`endpoint` is required for each entry. The other fields are optional. Omitted
+`queue_capacity` uses Promptkit's default queue policy when concurrency is
+bounded, while an explicit zero disables queuing. The configuration contract
+and complete maintained configuration example will document this shape when
+the feature is implemented.
+
+### Prompt And Profile Inspection CLI
+
+Scriptorium will add a CLI inspection command with prompt and profile modes.
+The intended command family is:
+
+- `scriptorium inspect prompt`, backed by `Engine.InspectPrompt`; and
+- `scriptorium inspect profile`, backed by `Engine.InspectProfile`.
+
+Prompt inspection will select an ID and optional version and report the
+normalized prompt identity, opaque prompt hash, declared default profile,
+declared inputs, and normalized output contract. It will not require input
+artifacts, resolve a profile, load a schema, render templates, reserve backend
+capacity, or contact a model.
+
+Profile inspection will select an explicit profile ID and report its resolved
+effective target, backend identity, optional credential source name, and
+whether a later request must provide credential configuration. It will not
+read credential values, load a prompt, reserve capacity, or contact a model.
+
+Inspection will support deterministic Scriptorium-owned text and JSON output
+and normal output-file handling. Scriptorium will define explicit output DTOs
+rather than treating Promptkit inspection structs as stable wire formats.
+Inspection failures will use existing public Promptkit error identities and
+Scriptorium-owned CLI diagnostics and exit behavior.
+
+The prompt form accepts `--prompt`, optional `--prompt-version`, `--config`,
+`--prompt-dir`, `--format text|json`, and `--out`. The profile form accepts
+`--profile`, `--config`, `--profile-dir`, `--format text|json`, and `--out`.
+Both forms reject positional arguments and default to text output independently
+of `defaults.render_format`. Configuration discovery and CLI-over-file source
+precedence match the existing command family. Prompt inspection requires an
+effective prompt directory; profile inspection does not, because Promptkit's
+built-in profiles remain inspectable without one.
+
+## Documentation And Example Changes
+
+Implementation of this roadmap requires coordinated updates to the canonical
+owners of affected behavior:
+
+- `docs/cli.md` for session and reasoning flags, inspection commands, output,
+  prompt-version selection, optional inputs, and exit behavior;
+- `docs/api.md` for `session_id`, effective backend/session metadata, reasoning
+  presence semantics, optional inputs, and the capacity response;
+- `docs/config.md` for custom backend configuration and current Promptkit
+  credential and provider-default semantics;
+- `docs/operations.md` for capacity and custom-backend operational guidance
+  where deployment handling is affected;
+- `docs/internal/adapters.md` and `docs/internal/sources.md` for implemented
+  mapping and engine-assembly behavior;
+- `docs/policy/architecture.md` and `docs/internal/overview.md` only if concrete
+  component responsibilities or durable boundaries change; and
+- maintained examples for valid v0.9.0 prompt/profile formats and custom
+  backend configuration.
+
+Current-state documents must not describe these features as implemented until
+the corresponding code lands.
+
+## Validation And Completion Criteria
+
+The roadmap is complete only when:
+
+- ordinary and race-enabled tests pass against the tagged Promptkit v0.9.0
+  dependency;
+- `go vet ./...` and `go build ./cmd/scriptorium` pass;
+- Go formatting and `git diff --check` pass;
+- the architecture guard passes with no workspace, replacement, vendor tree,
+  former facade, or Promptkit internal import;
+- maintained render, custom-backend, session, reasoning, and inspection
+  examples execute successfully without real credentials or provider calls;
+- CLI tests cover explicit and omitted prompt versions for prompt IDs with one
+  or multiple definitions;
+- CLI and HTTP tests cover prompts with no declared inputs, omitted optional
+  inputs, missing required inputs, and template-referenced inputs;
+- HTTP tests cover omitted, replacement, and clearing reasoning states;
+- CLI and HTTP tests cover session propagation and invalid session handling;
+- presentation tests cover registered and endpoint-only backend identity;
+- HTTP tests cover capacity rejection independently from provider failure;
+- concurrent HTTP tests demonstrate that one server's requests share backend
+  admission and cannot bypass capacity through per-request engine creation;
+- configuration tests cover strict decoding, precedence, queue-capacity
+  presence, invalid backends, and secret-field rejection;
+- inspection tests cover deterministic text and JSON, source selection,
+  output-file handling, safe credential presentation, and public error
+  mapping;
+- all maintained prompt roles and repair budgets are valid under Promptkit
+  v0.9.0; and
+- representative definition fixtures cover inline and file-backed messages,
+  cache control, session templates, every output validation mode, schemas,
+  profile inheritance, built-in and custom backends, execution controls,
+  credential environment names, and extra parameters without Scriptorium
+  independently parsing those fields; and
+- affected documentation links and copyable examples validate successfully.
+
+## Explicit Non-Goals
+
+This roadmap does not include:
+
+- appended request messages in either executable interface;
+- retained or durable prepared-execution handles;
+- HTTP prompt or profile inspection routes;
+- embedded application fallback profiles;
+- single-file, injected `fs.FS`, or in-memory prompt and profile source
+  configuration;
+- request-level output-contract replacement through the executable interfaces;
+- public disclosure of structured provider error details;
+- direct imports or configuration of Promptkit's external catalog modules;
+- raw API-key configuration, CLI flags, or HTTP fields;
+- durable run state, conversations, retries, archives, checkpoints, or resume;
+  or
+- changes to Promptkit itself.

docs/roadmap/remediation.md

@@ -0,0 +1,77 @@
+# Promptkit Upgrade Review Remediation
+
+## Scope And Status
+
+Review baseline: `e177d7c`, covering implementation commits after `5c3b0cf`.
+This document records a resolved test-contract issue; it does not authorize
+unrelated implementation changes. No runtime defect or missing planned feature
+was identified in this review. Release preparation remains separate work.
+
+## R1: Remove The Unrequested Context-Identity Invariant
+
+Priority: P3 (low). Status: Complete.
+
+Original location: `internal/adapter/http/handler_test.go:334–349`,
+`TestHandlerRunTimeoutValidationAndContextMapping`, introduced in `7de2b02`.
+
+The test's `child` field and `(ctx != parent) != tc.child` assertion required
+the exact parent context object for omitted/null/zero timeouts and a distinct
+object for a positive timeout. The requested contract concerns effective
+deadlines and cancellation propagation, not Go interface identity. In
+particular, a harmless derived context that preserves the parent's deadline,
+values, and cancellation would fail the omission cases despite satisfying the
+application contract.
+
+This elevated an incidental implementation choice into a test-enforced
+invariant, contrary to the [agent policy](../policy/agents.md) and
+[testing policy](../policy/testing.md). The current handler's context behavior
+is correct; this is a maintainability issue, not a runtime cancellation bug.
+
+### Required Change
+
+Remove the identity comparison and the identity-only table field. Retain
+behavioral assertions that an earlier parent deadline is not extended and
+parent cancellation reaches execution. For omitted/null/zero values, verify
+that no deadline is introduced when the parent has none. Retain coverage of
+positive deadlines and the distinction between a canceled execution context
+and a provider-attempt timeout while the execution context remains live.
+
+Use the existing runner seam and focused cases; do not introduce a context
+wrapper framework, timer abstraction, new public guarantee, or production
+refactor solely to change this test.
+
+### Completion Criteria
+
+- Tests protect effective deadline/cancellation behavior without requiring
+  context object identity.
+- A semantically equivalent derived context does not fail merely because it
+  is a different object.
+- Existing timeout validation and HTTP outcome coverage remains intact.
+
+### Resolution And Validation
+
+Removed the identity-only table field and context comparisons. The test now
+checks effective deadlines, including omitted/null/zero requests with no
+parent deadline, and explicitly checks that parent cancellation reaches the
+runner. Existing positive-deadline integration tests and live-context
+provider-timeout mapping remain intact. No production code changed.
+
+Focused HTTP timeout tests, `go test ./...`, `go test -race ./...`,
+`go vet ./...`, a native build outside the repository, and `git diff --check`
+all passed after remediation.
+
+## Original Review Verification
+
+- `go test -race -count=1 ./...` passed, including retry, shared-capacity,
+  deadline, report, definition-conformance, and architecture-boundary tests.
+- `go vet ./...` passed.
+- A native `cmd/scriptorium` build passed, with output outside the repository.
+- The selected dependency is Promptkit v0.11.0 with its intended v2 catalogs.
+- Application code, tests, release automation, and historical releases were
+  not changed during this review.
+
+The runtime ownership boundaries remain as intended: Promptkit owns framework
+formats, execution, retries, and backend admission; Scriptorium owns executable
+adapters, application settings, HTTP artifact policy, deadlines, and terminal
+report presentation. No additional runtime restrictions, durable workflow
+state, or extra release compliance gates were identified in the reviewed diff.

docs/roadmap/step5.md

@@ -1,94 +0,0 @@
-# Migration Step 5: Promptkit Repository Foundation
-
-## Status
-
-Complete as of 2026-07-28.
-
-## Purpose
-
-Establish Promptkit as an independent, maintainable Go library repository ready
-to receive framework extraction in Migration Step 6 without moving framework
-behavior prematurely.
-
-The [main migration roadmap](migration.md) owns the overall sequence.
-[ADR 0002](../adr/0002-split-promptkit-from-scriptorium.md) owns the repository
-boundary, module path, versioning direction, and cross-repository ordering.
-[ADR 0003](../adr/0003-use-maintainer-run-validation-and-tag-only-releases-for-promptkit.md)
-owns the maintainer-run validation and tag-only release decision.
-
-## Completed Work
-
-### Repository And Module Foundation
-
-- Confirmed the Promptkit repository, maintainer governance, configured origin,
-  and `main` tracking of `origin/main`.
-- Created dependency-free module
-  `gitea.maximumdirect.net/eric/promptkit` with Go `1.25.5`.
-- Added the root `promptkit` package as the sole implemented Go package and
-  public package boundary.
-- Added no framework implementation, exported API, internal package,
-  speculative package tree, command, workspace file, or local replacement.
-- Retained GPLv3 and changed only the two template project names in its example
-  notices to `Promptkit`.
-
-### Durable Repository Guidance
-
-- Replaced application-template architecture, documentation, and testing
-  policies with library-specific policies.
-- Recorded the root package as the only implemented component and kept future
-  framework boundaries explicitly unimplemented.
-- Rewrote repository orientation and contributor workflow for the Promptkit
-  module.
-- Documented deterministic, offline, parallel-safe, maintainer-run validation.
-- Documented temporary sibling workspace and uncommitted replacement workflows
-  without committing machine-local coupling.
-- Added a semantic Go module tag release procedure with no runnable binaries or
-  hosted CI.
-
-### Decision Reconciliation
-
-- Accepted ADR 0003 as the later controlling decision for Promptkit validation
-  while leaving ADR 0002 Accepted and its repository-split decision unchanged.
-- Reconciled the main migration roadmap with maintainer-run validation,
-  tag-only releases, and the requirement that Promptkit publish its first
-  versioned tag before Scriptorium adopts it.
-
-## Acceptance Record
-
-From a clean Promptkit checkout with no active Go workspace or local
-replacement, the maintainer successfully ran:
-
-```sh
-go test ./...
-go vet ./...
-go build ./...
-gofmt -l $(git ls-files '*.go')
-git diff --check
-```
-
-The formatting command produced no paths. Acceptance also confirmed:
-
-- module path `gitea.maximumdirect.net/eric/promptkit`, Go `1.25.5`, root
-  package `promptkit`, and matching import path;
-- no external dependency, `go.sum`, `go.work`, `go.work.sum`, or `replace`
-  directive;
-- no hosted CI configuration, command package, release artifact, version tag,
-  or placeholder framework package;
-- every maintained Markdown link resolves;
-- repository orientation, policies, inventory, contributor workflow, and
-  release procedure are internally consistent and free of template residue;
-- the configured origin belongs to Promptkit and `main` tracks `origin/main`;
-- GPLv3 wording and attribution remain unchanged apart from the two approved
-  Promptkit example-notice names; and
-- Scriptorium contains only the decision and roadmap documentation required for
-  this foundation work, with no production code or module dependency change.
-
-## Scope Boundary And Next Gate
-
-No framework implementation or public framework API was extracted, no consumer
-was migrated, and no `v0.1.0` tag was created. Promptkit remains an independently
-valid repository foundation.
-
-Migration Step 6 is now authorized to extract and stabilize the framework. It
-must pass Promptkit's documented validation and publish the first versioned tag
-before Scriptorium or another consumer adopts the module.

docs/roadmap/upgrade-kit.md

@@ -0,0 +1,273 @@
+# Promptkit v0.11 Adoption
+
+## Status And Intent
+
+Accepted feature direction, recorded on 2026-09-26. Implementation is complete
+to the pre-release boundary; version selection, release-candidate validation,
+and publication remain separate release preparation. The baseline descriptions
+below record the state when this roadmap was written, not current behavior.
+Upgrade directly from Promptkit v0.9.0 to v0.11.0, including the intervening
+v0.10.0 catalog transition. This document defines the desired end state and
+the changes from the current baseline. The [implementation plan](implementation.md)
+owns sequencing, concrete interface choices, verification steps, and unresolved
+implementation decisions.
+
+The target is complete definition compatibility, controllable transient
+retries, an optional whole-run deadline, and modest opt-in execution diagnostics.
+This is a focused adapter and configuration update, not another architecture
+migration. Optional diagnostics are included in the desired feature set.
+“Optional” means callers opt in, not that diagnostics may be silently omitted
+from the completed adoption or appear in default output.
+
+[ADR 0004](../adr/0004-definition-boundary.md) and the
+[architecture policy](../policy/architecture.md) govern scope. Promptkit remains
+the parser, validator, execution engine, and owner of framework defaults.
+Scriptorium remains a simple executable application for independent prompt
+executions, with shared operational state where required for backend limits.
+
+## Baseline And Upstream Changes
+
+Scriptorium currently selects Promptkit v0.9.0 and the v1.0.0 backend catalog
+modules. It already supports CLI execution, rendering, prompt/profile
+inspection, HTTP execution, configured backends, and presence-aware execution
+overrides. It does not expose transient retry settings, a whole-run deadline,
+or execution observers. CLI execution currently supplies a background context.
+
+The upstream review covered the local tagged release v0.11.0 at commit
+`db05b56166ca2d8650dfaf660e1cf0eed3932e1d`. Its canonical references are:
+
+- [v0.10.0 migration guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.10.0/docs/releases/v0.10.0.md);
+- [v0.11.0 release notes](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/releases/v0.11.0.md);
+- [definition formats](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/formats.md);
+- [execution and retry integration contract](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/integrations/openai-compatible-chat.md);
+- [consumer guide](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/docs/consumers/pkg-promptkit.md); and
+- [observation declarations](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/observations.go).
+
+A diagnostic run using a temporary module file compiled Scriptorium against
+v0.11.0. The existing test suite reported one failing profile-inspection case
+that selects the removed `deepseek-4-flash` profile; other packages passed.
+This establishes an initial migration issue, not proof of complete behavioral
+compatibility or coverage of the new capabilities. The diagnostic did not
+change the repository dependency pin.
+
+Neither intervening release adds declarative prompt/profile fields requiring
+new adapter plumbing. The definition-facing changes concern catalog contents
+and resolution precedence. Retry and observer APIs are execution controls;
+their adoption is a deliberate case-by-case choice under ADR 0004.
+
+## Dependency And Definition Compatibility
+
+### Target End State
+
+Scriptorium uses tagged Promptkit v0.11.0 through its supported root package,
+with the catalog versions selected by that release:
+
+- `promptkit-backend-openrouter/v2` v2.20260922.1;
+- `promptkit-backend-rakestrawhome/v2` v2.20260922.0.
+
+Valid definitions for the selected Promptkit version remain usable through
+Scriptorium's existing sources and adapters, subject to its established HTTP
+artifact and deployment boundaries. Rendering and inspection remain offline
+operations that do not generate model output.
+
+The maintained names `promptkit-openrouter-standard` and
+`promptkit-openrouter-auto` work wherever a profile ID is accepted, including
+prompt defaults, explicit selection, inheritance, and profile inspection.
+They are opt-in choices, not new Scriptorium defaults. Ordinary custom-source
+precedence remains intact.
+
+A stable maintained name is not a frozen model/settings selection. External
+catalog entries can change or disappear across upgrades; inheriting from one
+does not create a frozen copy. Complete application-owned profiles remain the
+appropriate choice when an application owns its model and settings.
+
+### Change From Baseline
+
+The module graph and active definition fixtures reflect the released v0.11
+catalogs rather than v0.9's catalogs. The selected catalog removes
+`deepseek-3-2`, `deepseek-4-flash`, and `deepseek-4-pro`; newer DeepSeek names
+are not compatibility aliases. Migration guidance offers an available catalog
+profile, a maintained Promptkit name, or a complete application-owned definition.
+Application-owned examples retain fixed settings where that is their purpose.
+
+Definition conformance and focused resolution coverage protect Scriptorium's
+adapter boundary without duplicating the upstream parser or catalog. Existing
+dependency boundaries also apply to the new `/v2` module paths.
+
+## Controllable Transient Retries
+
+### Target End State
+
+Expose `transient_retries` in application configuration, with a CLI execution
+override and an HTTP request override. Preserve value presence throughout:
+
+| Value | Meaning |
+| --- | --- |
+| Omitted | Inherit the engine setting, ultimately Promptkit's default. |
+| Zero | Disable additional transient attempts. |
+| Positive integer | Permit that many additional transient attempts. |
+| Negative integer | Invalid configuration or request. |
+
+Adopt Promptkit's default of two additional attempts rather than silently
+pinning the previous single-attempt behavior. Users must be able to select zero
+explicitly. Request overrides take precedence over application configuration;
+omission must not accidentally become an explicit zero.
+
+Promptkit alone owns eligible statuses, attempt execution, backoff,
+`Retry-After`, and capacity coordination. Scriptorium adds no outer model retry
+loop. Transient retries and structural repairs have distinct budgets: each
+generation, including each repair generation, receives its transient budget.
+Retries do not imply exactly-once generation or complete billing knowledge.
+
+### Change From Baseline
+
+Application settings reach `promptkit.Config.TransientRetries`, including the
+shared server engine, and request overrides reach
+`promptkit.RunRequest.TransientRetries`. This adds execution controls, not
+prompt/profile schema fields or provider model parameters. Strict decoding and
+presence-aware mapping preserve inheritance and explicit zero. User and
+operations guidance makes the changed default, latency/cost implications, and
+independent repair budget visible. Cancellation and shared backend limits
+remain effective during retrying executions.
+
+## Optional Whole-Run Deadline
+
+### Target End State
+
+Callers can opt into a total execution deadline independently of the existing
+generation timeout. No new default deadline is imposed. Existing timeout
+controls must not silently change meaning: in v0.11.0 they apply per generation
+attempt, whereas a whole-run deadline bounds the overall operation, including
+preparation, capacity waiting, retry delays, attempts, and repairs as supported
+by the upstream context contract.
+
+Expose this choice through CLI execution and HTTP execution. Derive any timeout
+context from the caller's existing context, so a caller cancellation or earlier
+deadline still wins. This is a cancellation boundary, not a guarantee of
+instantaneous interruption of arbitrary callback or filesystem code.
+
+### Change From Baseline
+
+CLI execution can carry a selected deadline instead of always using an
+unbounded background context. HTTP execution can shorten the incoming context
+without losing parent cancellation or changing server lifecycle behavior.
+Total-run duration handling is separate from existing attempt-timeout conversion.
+The interval covers the engine invocation, not adapter parsing, engine creation,
+or output writing. Provider retry timing can exceed local backoff limits;
+per-attempt timeouts do not cap that complete invocation.
+
+## Opt-In Execution Reports
+
+### Target End State
+
+Provide a modest terminal execution report for CLI and HTTP callers who opt
+in. Capture selected metadata through `RunRequest.Observer`, including attempt,
+retry, repair, timing, outcome, and presence-aware usage information. Reports
+should be available for completed successful and failed execution invocations
+when Promptkit supplies terminal observations. Do not invent execution data for
+failures that occur before invocation.
+
+Keep generated CLI content on stdout or the existing output path. Execution
+reports use a separate destination. Ordinary CLI output and HTTP response
+shapes remain unchanged when reporting is not requested.
+
+The report has a Scriptorium-owned schema rather than serializing upstream
+events directly: `ExecutionEvent` has no stable JSON contract. Preserve unknown
+usage versus reported zero, and incomplete versus complete observed totals.
+Existing successful-result usage semantics remain unchanged. A terminal total
+is an aggregate, not another attempt to add to the bill; no report is a billing
+ledger.
+
+### Change From Baseline
+
+Both adapters have opt-in reporting and explicit application-owned report DTOs.
+Per-request collection adds no shared mutable report state, durable storage,
+callback I/O, or event archive. Operational failures can carry reports without
+manufacturing partial `RunResult` values. Default output remains unchanged.
+
+Reports exclude prompt and response bodies, credentials, headers, endpoint URLs,
+provider diagnostic text, and raw errors. Selected identifiers remain potentially
+sensitive even when observations are content-free. Reports are concise terminal
+metadata, not a general telemetry framework, event stream, or durable history.
+
+## Errors And Compatibility
+
+Preserve existing CLI exit classifications and HTTP `502 / llm_failed`
+classification for generation failures. Keep safe public messages rather than
+exposing provider error bodies or parsing diagnostic strings.
+
+Promptkit adds `ErrTransport`, `ErrMalformedResponse`, `ErrRetriesExhausted`, and
+`RetryExhaustedError`. Use their public identities to support optional structured
+failure details in execution diagnostics, including actual attempts where
+available. Retry exhaustion and the final cause are distinct facts; do not lose
+the underlying failure category by flattening them into one label.
+
+Capacity and validation behavior remains intact. Whole-run deadline and caller
+cancellation outcomes are deliberate adapter classifications, distinct from a
+provider-attempt timeout while the caller context is still live. The implementation
+plan owns the exact presentation choices. Existing generation-error codes do
+not need a breaking replacement for this upgrade.
+
+## Licensing And Distribution Review
+
+Promptkit v0.11.0 changes from GPLv3 to LGPL-3.0-or-later. Scriptorium's current
+binary workflow produces statically linked Go executables, and upstream's
+[license summary](https://gitea.maximumdirect.net/eric/promptkit/src/tag/v0.11.0/README.md#license)
+explicitly calls out distribution considerations for that model. Catalog and
+other dependency licenses remain separate.
+
+Before distributing the upgraded binaries, resolve the applicable notices,
+license texts, source availability, and any required materials or permissions
+for recombination with a modified library. Record the chosen distribution
+approach and make any corresponding packaging/documentation changes. This
+roadmap is not a legal determination or a complete compliance checklist.
+
+Do not automatically relicense Scriptorium, assume that library source alone
+settles every distribution requirement, or alter historical release contents.
+Licensing review is a concrete adoption prerequisite, not a new blanket manual
+approval gate for every future release.
+
+## Documentation And Delivery
+
+Current documentation links to the selected v0.11.0 contracts once implemented.
+CLI, HTTP, configuration, and operations documents own their respective new
+behavior; internal docs explain adapter mapping; release notes summarize
+compatibility impact. Historical release notes and ADR decision content remain
+unchanged. Current examples and migration guidance reflect the selected version.
+
+The upgrade merits a minor Scriptorium release, not a compatibility patch,
+with prominent migration guidance for removed profiles, changed retry behavior,
+the explicit single-attempt option, and timeout layering. Any later decision to
+defer part of the target leaves that feature visibly incomplete until delivered.
+
+Use the existing [release policy](../policy/release.md) and
+[runbook](../release.md). This roadmap authorizes no publication. No new ADR is
+needed unless a later decision changes the established product or compatibility
+boundaries.
+
+## Completion Criteria
+
+- The tagged dependency and selected catalog modules are adopted without
+  unsupported imports or local dependency substitutions.
+- Existing definition conformance tests and focused maintained-profile tests
+  pass; removed profile IDs have explicit migration guidance, not silent aliases.
+- Retry settings preserve omission and zero across configuration, CLI, and HTTP;
+  Promptkit remains the sole retry/capacity implementation.
+- Optional total deadlines bound the caller operation without redefining
+  per-attempt timeouts or disabling parent cancellation.
+- Opt-in terminal reports provide safe, isolated, presence-aware execution
+  metadata without changing default output or creating durable workflow state.
+  Any deferred reporting work remains visibly incomplete.
+- Existing error classifications remain compatible, with deliberate handling
+  of the new public identities and context outcomes.
+- The licensing/distribution approach is resolved before upgraded binary
+  distribution, and any required materials are included in the chosen workflow.
+- Affected current contracts, examples, and migration guidance match
+  implemented behavior. Relevant tests remain offline and credential-free,
+  and normal development validation passes. Release-candidate validation and
+  the version-matched note remain release preparation.
+
+Concrete interface decisions and the selected distribution approach are recorded
+in the completed [implementation plan](implementation.md). They do not expand
+the product into conversations, follow-up messages, application-owned semantic
+retry loops, prepared-handle coordination, or multi-step workflows.

engine.go

@@ -1,343 +0,0 @@
-package scriptorium
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"io/fs"
-	"net/http"
-	"os"
-	"path/filepath"
-	"strings"
-	"time"
-
-	artifactadapter "gitea.maximumdirect.net/eric/scriptorium/internal/artifact"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/defaults"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/llm"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/profile"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/profile/builtin"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/prompt"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/promptdef"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/usecase"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/validate"
-)
-
-// ErrInvalidConfig indicates invalid public engine configuration.
-var ErrInvalidConfig = errors.New("invalid engine configuration")
-
-var (
-	ErrInvalidRequest   = errors.New("invalid run request")
-	ErrPromptNotFound   = errors.New("prompt not found")
-	ErrProfileNotFound  = errors.New("profile not found")
-	ErrProfileRequired  = errors.New("profile selection is required")
-	ErrPromptLoad       = errors.New("failed to load prompt definition")
-	ErrProfileLoad      = errors.New("failed to load execution profile")
-	ErrAPIKeyEnvMissing = errors.New("api_key_env points to an unset environment variable")
-	ErrArtifactLoad     = errors.New("failed to load artifact")
-	ErrPromptRender     = errors.New("failed to render prompt")
-	ErrLLMGenerate      = errors.New("failed to generate output")
-	ErrValidation       = errors.New("failed to validate output")
-)
-
-// Engine prepares and runs Scriptorium prompt requests.
-type Engine struct {
-	runner *usecase.Runner
-}
-
-// Config configures a public Scriptorium engine.
-type Config struct {
-	PromptDir  string
-	ProfileDir string
-	SchemaDir  string
-	// Timeout is the transport-wide safety cap for the built-in LLM client
-	// when HTTPClient is absent or has a non-positive timeout.
-	Timeout time.Duration
-	// HTTPClient is cloned for the built-in LLM client. Its positive Timeout
-	// takes precedence over Config.Timeout as the transport-wide safety cap.
-	HTTPClient *http.Client
-}
-
-// Option customizes engine construction.
-type Option interface {
-	apply(*engineOptions) error
-}
-
-type optionFunc func(*engineOptions) error
-
-func (f optionFunc) apply(options *engineOptions) error {
-	return f(options)
-}
-
-type engineOptions struct {
-	llmClient       llm.Client
-	artifactReader  artifactadapter.Reader
-	promptDefs      promptdef.Repository
-	profiles        profile.Repository
-	memoryProfiles  profile.Repository
-	validator       validate.Validator
-	promptSource    bool
-	profileSource   bool
-	memorySource    bool
-	validatorSource bool
-	artifactSource  bool
-}
-
-// WithLLMClient injects a custom LLM client for execution.
-func WithLLMClient(client LLMClient) Option {
-	return optionFunc(func(options *engineOptions) error {
-		if client == nil {
-			return ErrInvalidConfig
-		}
-		options.llmClient = publicLLMClientAdapter{client: client}
-		return nil
-	})
-}
-
-// WithArtifactReader injects a reader for every input artifact reference.
-func WithArtifactReader(reader ArtifactReader) Option {
-	return optionFunc(func(options *engineOptions) error {
-		if reader == nil {
-			return ErrInvalidConfig
-		}
-		options.artifactReader = publicArtifactReaderAdapter{reader: reader}
-		options.artifactSource = true
-		return nil
-	})
-}
-
-// WithPromptFS loads prompt definitions from fsys under root.
-//
-// The source uses the same strict prompt YAML rules as configured prompt
-// directories, and prompt content_file paths resolve within this source.
-func WithPromptFS(fsys fs.FS, root string) Option {
-	return optionFunc(func(options *engineOptions) error {
-		if fsys == nil {
-			return ErrInvalidConfig
-		}
-		if strings.TrimSpace(root) == "" {
-			return ErrInvalidConfig
-		}
-		options.promptDefs = promptdef.NewFSRepository(fsys, root)
-		options.promptSource = true
-		return nil
-	})
-}
-
-// WithPromptFile loads prompt definitions from the single prompt file at path.
-//
-// Relative prompt content_file paths resolve from the file's directory.
-func WithPromptFile(path string) Option {
-	return optionFunc(func(options *engineOptions) error {
-		fsys, root, err := fileSource(path)
-		if err != nil {
-			return err
-		}
-		options.promptDefs = promptdef.NewFSRepository(fsys, root)
-		options.promptSource = true
-		return nil
-	})
-}
-
-// WithProfileFS loads execution profiles from fsys under root.
-//
-// Profiles from this source overlay built-in profiles. Profile YAML must use
-// api_key_env for environment-based credentials; raw API keys are rejected.
-func WithProfileFS(fsys fs.FS, root string) Option {
-	return optionFunc(func(options *engineOptions) error {
-		if fsys == nil {
-			return ErrInvalidConfig
-		}
-		if strings.TrimSpace(root) == "" {
-			return ErrInvalidConfig
-		}
-		options.profiles = profile.NewFSRepository(fsys, root)
-		options.profileSource = true
-		return nil
-	})
-}
-
-// WithProfileFile loads execution profiles from the single profile file at path.
-//
-// The profile overlays built-in profiles. Profile YAML must use api_key_env for
-// environment-based credentials; raw API keys are rejected.
-func WithProfileFile(path string) Option {
-	return optionFunc(func(options *engineOptions) error {
-		fsys, root, err := fileSource(path)
-		if err != nil {
-			return err
-		}
-		options.profiles = profile.NewFSRepository(fsys, root)
-		options.profileSource = true
-		return nil
-	})
-}
-
-// WithProfiles configures in-memory profiles that take precedence over
-// configured profile files and built-in profiles.
-func WithProfiles(profiles ...Profile) Option {
-	return optionFunc(func(options *engineOptions) error {
-		repo, err := newMemoryProfileRepository(profiles)
-		if err != nil {
-			return err
-		}
-		options.memoryProfiles = repo
-		options.memorySource = true
-		return nil
-	})
-}
-
-// WithSchemaFS loads JSON Schema documents from fsys under root.
-//
-// Prompt schema_path values resolve within this source when schema validation
-// or structured output is requested.
-func WithSchemaFS(fsys fs.FS, root string) Option {
-	return optionFunc(func(options *engineOptions) error {
-		if fsys == nil {
-			return ErrInvalidConfig
-		}
-		if strings.TrimSpace(root) == "" {
-			return ErrInvalidConfig
-		}
-		options.validator = validate.NewFSValidator(fsys, root)
-		options.validatorSource = true
-		return nil
-	})
-}
-
-// WithSchemaFile loads JSON Schema documents from the single schema file at path.
-//
-// Prompt schema_path values refer to the file's base name.
-func WithSchemaFile(path string) Option {
-	return optionFunc(func(options *engineOptions) error {
-		fsys, root, err := fileSource(path)
-		if err != nil {
-			return err
-		}
-		options.validator = validate.NewFSValidator(fsys, root)
-		options.validatorSource = true
-		return nil
-	})
-}
-
-// NewEngine constructs an Engine using the same default internal components as
-// the CLI and HTTP adapters.
-func NewEngine(cfg Config, opts ...Option) (*Engine, error) {
-	var options engineOptions
-	for _, opt := range opts {
-		if opt == nil {
-			continue
-		}
-		if err := opt.apply(&options); err != nil {
-			return nil, fmt.Errorf("%w: %v", ErrInvalidConfig, err)
-		}
-	}
-
-	promptDefs := options.promptDefs
-	if !options.promptSource {
-		if strings.TrimSpace(cfg.PromptDir) == "" {
-			return nil, fmt.Errorf("%w: prompt directory is required", ErrInvalidConfig)
-		}
-		promptDefs = promptdef.NewFilesystemRepository(cfg.PromptDir)
-	}
-
-	profiles := builtin.NewRepositoryWithDirectory(cfg.ProfileDir)
-	if options.profileSource {
-		profiles = builtin.NewRepositoryWithPrimary(options.profiles)
-	}
-	if options.memorySource {
-		profiles = profile.NewOverlayRepository(options.memoryProfiles, profiles)
-	}
-
-	validator := options.validator
-	if !options.validatorSource {
-		schemaDir := cfg.SchemaDir
-		if strings.TrimSpace(schemaDir) == "" {
-			schemaDir = defaults.SchemaDirDefault
-		}
-		validator = validate.NewStandardValidator(schemaDir)
-	}
-
-	llmClient := options.llmClient
-	if llmClient == nil {
-		var err error
-		llmClient, err = llm.NewOpenAICompatibleClient(llm.OpenAICompatibleConfig{
-			Timeout:    cfg.Timeout,
-			HTTPClient: cfg.HTTPClient,
-		})
-		if err != nil {
-			return nil, fmt.Errorf("%w: %v", ErrInvalidConfig, err)
-		}
-	}
-
-	artifacts := options.artifactReader
-	if !options.artifactSource {
-		artifacts = artifactadapter.NewCompositeReader()
-	}
-
-	return &Engine{
-		runner: usecase.NewRunner(
-			promptDefs,
-			profiles,
-			artifacts,
-			prompt.NewGoRenderer(),
-			llmClient,
-			validator,
-		),
-	}, nil
-}
-
-func fileSource(name string) (fs.FS, string, error) {
-	cleanName := strings.TrimSpace(name)
-	if cleanName == "" {
-		return nil, "", ErrInvalidConfig
-	}
-	dir := filepath.Dir(cleanName)
-	base := filepath.Base(cleanName)
-	if base == "." || base == string(filepath.Separator) || strings.TrimSpace(base) == "" {
-		return nil, "", ErrInvalidConfig
-	}
-	info, err := os.Stat(cleanName)
-	if err != nil {
-		return nil, "", fmt.Errorf("%w: failed to access source file %q: %v", ErrInvalidConfig, cleanName, err)
-	}
-	if info.IsDir() {
-		return nil, "", fmt.Errorf("%w: source path %q must be a file", ErrInvalidConfig, cleanName)
-	}
-	return os.DirFS(dir), filepath.ToSlash(base), nil
-}
-
-// Prepare resolves a prompt request without calling an LLM.
-func (e *Engine) Prepare(ctx context.Context, req RunRequest) (*PreparedRun, error) {
-	if e == nil || e.runner == nil {
-		return nil, fmt.Errorf("%w: engine is nil", ErrInvalidConfig)
-	}
-
-	domainReq, err := toDomainRunRequest(req)
-	if err != nil {
-		return nil, fmt.Errorf("%w: %v", ErrInvalidRequest, err)
-	}
-
-	prepared, err := e.runner.Prepare(ctx, domainReq)
-	if err != nil {
-		return nil, mapPublicError(err)
-	}
-	return fromDomainPreparedRun(prepared), nil
-}
-
-// Run executes a prompt request and returns the generated artifact and metadata.
-func (e *Engine) Run(ctx context.Context, req RunRequest) (*RunResult, error) {
-	if e == nil || e.runner == nil {
-		return nil, fmt.Errorf("%w: engine is nil", ErrInvalidConfig)
-	}
-
-	domainReq, err := toDomainRunRequest(req)
-	if err != nil {
-		return nil, fmt.Errorf("%w: %v", ErrInvalidRequest, err)
-	}
-
-	result, err := e.runner.Run(ctx, domainReq)
-	if err != nil {
-		return nil, mapPublicError(err)
-	}
-	return fromDomainRunResult(result), nil
-}

errors.go

@@ -1,60 +0,0 @@
-package scriptorium
-
-import (
-	"errors"
-	"fmt"
-
-	"gitea.maximumdirect.net/eric/scriptorium/internal/profile"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/promptdef"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/usecase"
-)
-
-func mapPublicError(err error) error {
-	if err == nil {
-		return nil
-	}
-	publicErr := publicErrorFor(err)
-	if publicErr == nil {
-		return err
-	}
-	return fmt.Errorf("%w: %w", publicErr, err)
-}
-
-func publicErrorFor(err error) error {
-	switch {
-	case errors.Is(err, promptdef.ErrPromptDefinitionNotFound):
-		return ErrPromptNotFound
-	case errors.Is(err, profile.ErrProfileNotFound):
-		return ErrProfileNotFound
-	case errors.Is(err, usecase.ErrProfileRequired):
-		return errors.Join(ErrInvalidRequest, ErrProfileRequired)
-	case errors.Is(err, usecase.ErrPromptLoad):
-		return ErrPromptLoad
-	case errors.Is(err, usecase.ErrProfileLoad):
-		return ErrProfileLoad
-	case errors.Is(err, promptdef.ErrInvalidYAML), errors.Is(err, promptdef.ErrInvalidPromptDefinition):
-		return ErrPromptLoad
-	case isProfileLoadCause(err):
-		return ErrProfileLoad
-	case errors.Is(err, usecase.ErrAPIKeyEnvMissing):
-		return errors.Join(ErrInvalidRequest, ErrAPIKeyEnvMissing)
-	case errors.Is(err, usecase.ErrArtifactLoad):
-		return ErrArtifactLoad
-	case errors.Is(err, usecase.ErrPromptRender):
-		return ErrPromptRender
-	case errors.Is(err, usecase.ErrLLMGenerate):
-		return ErrLLMGenerate
-	case errors.Is(err, usecase.ErrValidation):
-		return ErrValidation
-	case errors.Is(err, usecase.ErrInvalidRequest):
-		return ErrInvalidRequest
-	default:
-		return nil
-	}
-}
-
-func isProfileLoadCause(err error) bool {
-	return errors.Is(err, profile.ErrInvalidYAML) ||
-		errors.Is(err, profile.ErrInvalidProfile) ||
-		errors.Is(err, profile.ErrRawAPIKeyNotAllowed)
-}

examples/config-fragments/backend.yml

@@ -0,0 +1,4 @@
+backends:
+  local-gpu:
+    endpoint: http://localhost:11434/v1
+    api_key_env: LOCAL_GPU_API_KEY

examples/config-fragments/sources.yml

@@ -0,0 +1,3 @@
+prompt_dir: ./examples/prompts
+profile_dir: ./examples/profiles
+schema_dir: ./examples/schemas

examples/config.composed.yml

@@ -0,0 +1,8 @@
+# Select from the repository root; application paths remain working-directory-relative.
+configkit:
+  imports:
+    - path: config-fragments/sources.yml
+    - path: config-fragments/backend.yml
+
+server:
+  addr: :8080

examples/config.full.yml

@@ -2,6 +2,15 @@ prompt_dir: ./examples/prompts
 profile_dir: ./examples/profiles
 schema_dir: ./examples/schemas
 
+backends:
+  local-gpu:
+    endpoint: http://localhost:11434/v1
+    api_key_env: LOCAL_GPU_API_KEY
+    extra_params:
+      provider_option: enabled
+    concurrency_limit: 2
+    queue_capacity: 0
+
 server:
   addr: 127.0.0.1:8080
   artifact_root: .

examples/go-library/prepare/main.go

@@ -1,50 +0,0 @@
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"log"
-	"os"
-
-	"gitea.maximumdirect.net/eric/scriptorium"
-)
-
-func main() {
-	engine, err := scriptorium.NewEngine(scriptorium.Config{
-		PromptDir:  "./examples/prompts",
-		ProfileDir: "./examples/profiles",
-		SchemaDir:  "./examples/schemas",
-	})
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	prepared, err := engine.Prepare(context.Background(), scriptorium.RunRequest{
-		PromptID: "generic.markdown_summary",
-		Inputs: map[string]scriptorium.ArtifactRef{
-			"transcript": scriptorium.File("./examples/fixtures/transcript.md"),
-			"glossary":   scriptorium.File("./examples/fixtures/glossary.yml"),
-		},
-	})
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	summary := struct {
-		PromptID          string            `json:"prompt_id"`
-		SelectedProfileID string            `json:"selected_profile_id"`
-		Model             string            `json:"model"`
-		MessageCount      int               `json:"message_count"`
-		InputHashes       map[string]string `json:"input_hashes"`
-	}{
-		PromptID:          prepared.PromptID,
-		SelectedProfileID: prepared.SelectedProfileID,
-		Model:             prepared.EffectiveModelParams.Model,
-		MessageCount:      len(prepared.Messages),
-		InputHashes:       prepared.InputHashes,
-	}
-
-	if err := json.NewEncoder(os.Stdout).Encode(summary); err != nil {
-		log.Fatal(err)
-	}
-}

examples/overlays/local.yml

@@ -0,0 +1,4 @@
+defaults:
+  render_format: json
+server:
+  addr: 127.0.0.1:8080

examples/profiles/local-gpu.yml

@@ -0,0 +1,4 @@
+id: local-gpu
+backend: local-gpu
+model: local-model
+reasoning_effort: low

examples/render-v0.9-features.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$repo_root"
+
+go run ./cmd/scriptorium render \
+  --config ./examples/config.full.yml \
+  --prompt generic.markdown_summary \
+  --prompt-version 1.0.0 \
+  --profile local-gpu \
+  --session-id example-session \
+  --reasoning-effort= \
+  --input transcript=./examples/fixtures/transcript.md \
+  --input glossary=./examples/fixtures/glossary.yml
+
+go run ./cmd/scriptorium inspect prompt \
+  --config ./examples/config.full.yml \
+  --prompt generic.markdown_summary \
+  --format json
+
+go run ./cmd/scriptorium inspect profile \
+  --config ./examples/config.full.yml \
+  --profile local-gpu \
+  --format json

formatting.go

@@ -1,51 +0,0 @@
-package scriptorium
-
-import "fmt"
-
-// String returns a concise request summary without exposing direct API keys.
-func (r RunRequest) String() string {
-	return r.redactedString()
-}
-
-// GoString returns a concise request summary without exposing direct API keys.
-func (r RunRequest) GoString() string {
-	return r.redactedString()
-}
-
-func (r RunRequest) redactedString() string {
-	return fmt.Sprintf(
-		"scriptorium.RunRequest{PromptID:%q PromptVersion:%q ProfileID:%q APIKeySet:%t Inputs:%d Vars:%d ExecutionSet:%t ValidationSet:%t Metadata:%d}",
-		r.PromptID,
-		r.PromptVersion,
-		r.ProfileID,
-		r.APIKey != "",
-		len(r.Inputs),
-		len(r.Vars),
-		r.Execution != nil,
-		r.Validation != nil,
-		len(r.Metadata),
-	)
-}
-
-// String returns a concise request summary without exposing direct API keys or
-// rendered prompt content.
-func (r GenerateRequest) String() string {
-	return r.redactedString()
-}
-
-// GoString returns a concise request summary without exposing direct API keys or
-// rendered prompt content.
-func (r GenerateRequest) GoString() string {
-	return r.redactedString()
-}
-
-func (r GenerateRequest) redactedString() string {
-	return fmt.Sprintf(
-		"scriptorium.GenerateRequest{Messages:%d Model:%q APIKeySet:%t StructuredOutputSet:%t ExtraParams:%d}",
-		len(r.Prompt.Messages),
-		r.Target.Model,
-		r.APIKey != "",
-		r.StructuredOutput != nil,
-		len(r.Target.ExtraParams),
-	)
-}

go.mod

@@ -3,8 +3,15 @@ module gitea.maximumdirect.net/eric/scriptorium
 go 1.25.5
 
 require (
-	github.com/santhosh-tekuri/jsonschema/v6 v6.0.2
+	gitea.maximumdirect.net/eric/ConfigKit v0.4.0
-	gopkg.in/yaml.v3 v3.0.1
+	gitea.maximumdirect.net/eric/promptkit v0.11.0
 )
 
-require golang.org/x/text v0.14.0 // indirect
+require (
+	gitea.maximumdirect.net/eric/promptkit-backend-openrouter/v2 v2.20260922.1 // indirect
+	gitea.maximumdirect.net/eric/promptkit-backend-rakestrawhome/v2 v2.20260922.0 // indirect
+	github.com/santhosh-tekuri/jsonschema/v6 v6.0.2 // indirect
+	go.yaml.in/yaml/v4 v4.0.0-rc.6 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -1,7 +1,17 @@
+gitea.maximumdirect.net/eric/ConfigKit v0.4.0 h1:fo+vKff3zTGeWqJIA38NtT84b6OUP//9ZmBH3lFuKgk=
+gitea.maximumdirect.net/eric/ConfigKit v0.4.0/go.mod h1:tYWpsrbLyu05r8+1MapWp5fN6ZrX9I8hU2xEPedYmYk=
+gitea.maximumdirect.net/eric/promptkit v0.11.0 h1:x7JguOUiInPVXK0GEitjyoRFqqvcuSTjYUvqJ+whtik=
+gitea.maximumdirect.net/eric/promptkit v0.11.0/go.mod h1:0zEBVlJJC+ldDdXazAgybYBXNSe74vwFx5dyOuSos/w=
+gitea.maximumdirect.net/eric/promptkit-backend-openrouter/v2 v2.20260922.1 h1:S2/Q/JDE+m8Ca3pDhAjVbfYrdlEhs9blj0STgNopHo0=
+gitea.maximumdirect.net/eric/promptkit-backend-openrouter/v2 v2.20260922.1/go.mod h1:a3VBbh9oaGXD6ruxhtwHj+AWW6DY/SSyby1QtMmYSUo=
+gitea.maximumdirect.net/eric/promptkit-backend-rakestrawhome/v2 v2.20260922.0 h1:Y0EXc3eh12eKW2NrOviVqdk3oBo6UUjopt1YAa1B3Oc=
+gitea.maximumdirect.net/eric/promptkit-backend-rakestrawhome/v2 v2.20260922.0/go.mod h1:mtgD1E0SGm0e/I8Ffhz+AYX7GN7RKUWJXehNFIKHs4Y=
 github.com/dlclark/regexp2 v1.11.0 h1:G/nrcoOa7ZXlpoa/91N3X7mM3r8eIlMBBJZvsz/mxKI=
 github.com/dlclark/regexp2 v1.11.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
 github.com/santhosh-tekuri/jsonschema/v6 v6.0.2 h1:KRzFb2m7YtdldCEkzs6KqmJw4nqEVZGK7IN2kJkjTuQ=
 github.com/santhosh-tekuri/jsonschema/v6 v6.0.2/go.mod h1:JXeL+ps8p7/KNMjDQk3TCwPpBy0wYklyWTfbkIzdIFU=
+go.yaml.in/yaml/v4 v4.0.0-rc.6 h1:1h7H1ohdUh93/FyE4YaDa1Zh64K6VVbjF4K6WUxMtH4=
+go.yaml.in/yaml/v4 v4.0.0-rc.6/go.mod h1:aZqd9kCMsGL7AuUv/m/PvWLdg5sjJsZ4oHDEnfPPfY0=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=

internal/adapter/cli/application_config.go

@@ -0,0 +1,71 @@
+package cli
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"io"
+
+	configkit "gitea.maximumdirect.net/eric/ConfigKit"
+	appconfig "gitea.maximumdirect.net/eric/scriptorium/internal/config"
+)
+
+// applicationOverrides keeps explicit application flags separate from invocation state.
+func applicationOverrides(fs *flag.FlagSet) []configkit.Override {
+	var overrides []configkit.Override
+	fs.Visit(func(selected *flag.Flag) {
+		var path configkit.Path
+		switch selected.Name {
+		case "prompt-dir":
+			path = configkit.Keys("prompt_dir")
+		case "profile-dir":
+			path = configkit.Keys("profile_dir")
+		case "schema-dir":
+			path = configkit.Keys("schema_dir")
+		case "addr":
+			path = configkit.Keys("server", "addr")
+		case "artifact-root":
+			path = configkit.Keys("server", "artifact_root")
+		case "max-request-bytes":
+			path = configkit.Keys("server", "max_request_bytes")
+		case "max-artifact-bytes":
+			path = configkit.Keys("server", "max_artifact_bytes")
+		case "max-response-bytes":
+			path = configkit.Keys("server", "max_response_bytes")
+		default:
+			return
+		}
+		overrides = append(overrides, configkit.Override{
+			Path: path, Value: selected.Value.(flag.Getter).Get(), Flag: "--" + selected.Name,
+		})
+	})
+	return overrides
+}
+
+func loadApplicationSettings(configPath, overlay string, explicit bool, overrides []configkit.Override) (appconfig.AppSettings, []configkit.Diagnostic, error) {
+	result, err := appconfig.Load(appconfig.LoadOptions{
+		Path: configPath, Overlay: overlay, Explicit: explicit, Overrides: overrides,
+	})
+	if err != nil {
+		return appconfig.AppSettings{}, nil, err
+	}
+	return appconfig.Settings(result.Config), result.Diagnostics(), nil
+}
+
+func writeApplicationError(output io.Writer, label string, err error) {
+	var loadError *configkit.LoadError
+	if errors.As(err, &loadError) {
+		if writeErr := configkit.WriteDiagnostics(output, loadError.Diagnostics()); writeErr != nil {
+			_, _ = fmt.Fprintf(output, "%s diagnostic write error: %v\n", label, writeErr)
+		}
+		return
+	}
+	_, _ = fmt.Fprintf(output, "%s error: %v\n", label, err)
+}
+
+func writeApplicationWarnings(output io.Writer, diagnostics []configkit.Diagnostic) error {
+	if len(diagnostics) == 0 {
+		return nil
+	}
+	return configkit.WriteDiagnostics(output, diagnostics)
+}

internal/adapter/cli/config.go

@@ -0,0 +1,104 @@
+package cli
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io"
+
+	configkit "gitea.maximumdirect.net/eric/ConfigKit"
+	appconfig "gitea.maximumdirect.net/eric/scriptorium/internal/config"
+)
+
+type configurationSource struct {
+	ID    string          `json:"id"`
+	Label string          `json:"label"`
+	Layer configkit.Layer `json:"layer"`
+	Path  string          `json:"path,omitempty"`
+}
+
+func configCommand(args []string, stdout, stderr io.Writer) int {
+	if len(args) == 0 {
+		fmt.Fprintln(stderr, "config parse error: configuration mode is required")
+		return ExitRuntimeError
+	}
+	mode := args[0]
+	if mode != "validate" && mode != "show" && mode != "sources" && mode != "explain" {
+		fmt.Fprintln(stderr, "config parse error: unknown configuration mode")
+		return ExitRuntimeError
+	}
+
+	fs := flag.NewFlagSet("config "+mode, flag.ContinueOnError)
+	fs.SetOutput(io.Discard)
+	var path, overlay, pointer string
+	registerConfigSelectionFlags(fs, &path, &overlay)
+	registerConfigurationOverrides(fs)
+	if mode == "explain" {
+		fs.StringVar(&pointer, "path", "", "configuration path as a JSON Pointer")
+	}
+	if err := fs.Parse(args[1:]); err != nil {
+		writeApplicationError(stderr, "config parse", err)
+		return ExitRuntimeError
+	}
+	if fs.NArg() != 0 {
+		fmt.Fprintln(stderr, "config parse error: positional arguments are not accepted")
+		return ExitRuntimeError
+	}
+	var explanationPath configkit.Path
+	if mode == "explain" {
+		if !flagWasSet(fs, "path") {
+			fmt.Fprintln(stderr, "config parse error: --path is required")
+			return ExitRuntimeError
+		}
+		var err error
+		explanationPath, err = configkit.ParsePath(pointer)
+		if err != nil {
+			fmt.Fprintln(stderr, "config parse error: --path must be a JSON Pointer")
+			return ExitRuntimeError
+		}
+	}
+
+	result, err := appconfig.Load(appconfig.LoadOptions{
+		Path: path, Explicit: flagWasSet(fs, "config"), Overlay: overlay,
+		Overrides: applicationOverrides(fs),
+	})
+	if err != nil {
+		writeApplicationError(stderr, "config", err)
+		return ExitRuntimeError
+	}
+	if err := writeApplicationWarnings(stderr, result.Diagnostics()); err != nil {
+		return ExitRuntimeError
+	}
+	switch mode {
+	case "validate":
+		return ExitOK
+	case "show":
+		err = result.WriteEffective(stdout)
+	case "sources":
+		sources := make([]configurationSource, 0, len(result.Sources()))
+		for _, source := range result.Sources() {
+			sources = append(sources, configurationSource{
+				ID: source.ID, Label: source.Label, Layer: source.Layer, Path: source.Path,
+			})
+		}
+		err = json.NewEncoder(stdout).Encode(sources)
+	case "explain":
+		err = result.WriteExplanation(stdout, explanationPath)
+	}
+	if err != nil {
+		fmt.Fprintf(stderr, "config output error: %v\n", err)
+		return ExitRuntimeError
+	}
+	return ExitOK
+}
+
+func registerConfigurationOverrides(fs *flag.FlagSet) {
+	fs.String("prompt-dir", "", "prompt-definition directory override")
+	fs.String("profile-dir", "", "profile directory override")
+	fs.String("schema-dir", "", "schema directory override")
+	fs.String("addr", "", "HTTP listen address override")
+	fs.String("artifact-root", "", "HTTP artifact root override")
+	fs.Int64("max-request-bytes", 0, "HTTP request byte limit override")
+	fs.Int64("max-artifact-bytes", 0, "HTTP artifact byte limit override")
+	fs.Int64("max-response-bytes", 0, "HTTP response byte limit override")
+}

internal/adapter/cli/config_test.go

@@ -0,0 +1,207 @@
+package cli
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	appconfig "gitea.maximumdirect.net/eric/scriptorium/internal/config"
+)
+
+func TestConfigCommandsInspectApplicationWithoutEngine(t *testing.T) {
+	path := writeAppConfigFile(t, "{}\n")
+	for _, mode := range []string{"validate", "show", "sources"} {
+		code, stdout, stderr := runCLICommand(t, configCommand, []string{mode, "--config", path})
+		if code != ExitOK || stderr != "" {
+			t.Fatalf("%s failed: code=%d stdout=%q stderr=%q", mode, code, stdout, stderr)
+		}
+		switch mode {
+		case "validate":
+			if stdout != "" {
+				t.Fatalf("validation wrote stdout: %q", stdout)
+			}
+		case "show":
+			if !strings.Contains(stdout, "render_format: text") || !strings.Contains(stdout, "max_request_bytes: 16777216") {
+				t.Fatalf("effective defaults missing: %q", stdout)
+			}
+		case "sources":
+			var sources []configurationSource
+			if err := json.Unmarshal([]byte(stdout), &sources); err != nil || len(sources) != 1 || sources[0].Layer != "base" {
+				t.Fatalf("unexpected source records: %q (%v)", stdout, err)
+			}
+		}
+	}
+}
+
+func TestConfigCommandsExposeComposedSourcesAndResolvedValues(t *testing.T) {
+	dir := t.TempDir()
+	if err := os.MkdirAll(filepath.Join(dir, "overlays"), 0o755); err != nil {
+		t.Fatal(err)
+	}
+	base := filepath.Join(dir, "config.yml")
+	for path, body := range map[string]string{
+		base:                               "configkit:\n  imports:\n    - path: fragment.yml\nprompt_dir: ' ./before/../prompts '\nprofile_dir: ./profiles\n",
+		filepath.Join(dir, "fragment.yml"): "server:\n  addr: :8081\n",
+		filepath.Join(dir, "overlays", "local.yml"): "server:\n  addr: :9090\n",
+	} {
+		if err := os.WriteFile(path, []byte(body), 0o600); err != nil {
+			t.Fatal(err)
+		}
+	}
+	args := []string{"--config", base, "--config-overlay", "local", "--profile-dir=", "--addr", ":7070"}
+	code, stdout, stderr := runCLICommand(t, configCommand, append([]string{"show"}, args...))
+	if code != ExitOK || stderr != "" || !strings.Contains(stdout, "prompt_dir: prompts") || !strings.Contains(stdout, "profile_dir: ''") || !strings.Contains(stdout, "addr: :7070") {
+		t.Fatalf("resolved effective output changed: code=%d out=%q err=%q", code, stdout, stderr)
+	}
+	code, stdout, stderr = runCLICommand(t, configCommand, append([]string{"sources"}, args...))
+	if code != ExitOK || stderr != "" || !strings.HasSuffix(stdout, "\n") {
+		t.Fatalf("source command failed: code=%d out=%q err=%q", code, stdout, stderr)
+	}
+	var sources []configurationSource
+	if err := json.Unmarshal([]byte(stdout), &sources); err != nil || len(sources) != 5 {
+		t.Fatalf("unexpected composed source records: %+v (%v)", sources, err)
+	}
+	for i, layer := range []string{"base", "base", "overlay", "cli", "cli"} {
+		if string(sources[i].Layer) != layer {
+			t.Fatalf("source %d layer = %q, want %q", i, sources[i].Layer, layer)
+		}
+	}
+}
+
+func TestConfigInspectionKeepsReferencesAndOrdinaryParameters(t *testing.T) {
+	const name = "SCRIPTORIUM_CONFIG_TEST_API_KEY"
+	const secret = "synthetic-secret-value-should-not-appear"
+	path := writeAppConfigFile(t, `backends:
+  synthetic:
+    endpoint: http://127.0.0.1:1/v1
+    api_key_env: SCRIPTORIUM_CONFIG_TEST_API_KEY
+    extra_params:
+      visible_parameter: synthetic-ordinary-value
+`)
+	t.Setenv(name, secret)
+	for _, present := range []bool{true, false} {
+		if !present {
+			if err := os.Unsetenv(name); err != nil {
+				t.Fatal(err)
+			}
+		}
+		code, stdout, stderr := runCLICommand(t, configCommand, []string{"show", "--config", path})
+		if code != ExitOK || stderr != "" || !strings.Contains(stdout, name) || !strings.Contains(stdout, "synthetic-ordinary-value") || strings.Contains(stdout, secret) {
+			t.Fatalf("credential boundary changed with present=%t: code=%d out=%q err=%q", present, code, stdout, stderr)
+		}
+	}
+	result, err := appconfig.Load(appconfig.LoadOptions{Path: path, Explicit: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	settings := appconfig.Settings(result.Config)
+	if len(settings.Backends) != 1 || settings.Backends[0].ExtraParams["visible_parameter"] != "synthetic-ordinary-value" {
+		t.Fatalf("runtime backend parameters changed: %+v", settings.Backends)
+	}
+}
+
+type errorOutputWriter struct{}
+
+func (errorOutputWriter) Write([]byte) (int, error) { return 0, errors.New("output unavailable") }
+
+func TestConfigCommandFailuresDoNotProduceSuccessfulOutput(t *testing.T) {
+	path := writeAppConfigFile(t, "server:\n  max_request_bytes: -1\n")
+	for _, mode := range []string{"validate", "show", "sources"} {
+		code, stdout, stderr := runCLICommand(t, configCommand, []string{mode, "--config", path})
+		if code != ExitRuntimeError || stdout != "" || !strings.Contains(stderr, "validate.error") {
+			t.Fatalf("%s misclassified invalid config: code=%d out=%q err=%q", mode, code, stdout, stderr)
+		}
+	}
+	path = writeAppConfigFile(t, "{}\n")
+	var stderr bytes.Buffer
+	if code := configCommand([]string{"show", "--config", path}, errorOutputWriter{}, &stderr); code != ExitRuntimeError || !strings.Contains(stderr.String(), "output error") {
+		t.Fatalf("writer error not reported: code=%d stderr=%q", code, stderr.String())
+	}
+	if code := configCommand([]string{"sources", "--config", path}, errorOutputWriter{}, io.Discard); code != ExitRuntimeError {
+		t.Fatalf("source writer error returned %d", code)
+	}
+}
+
+func TestConfigExplainUsesResolvedHistoryAndKeepsParametersVisible(t *testing.T) {
+	dir := t.TempDir()
+	if err := os.MkdirAll(filepath.Join(dir, "overlays"), 0o755); err != nil {
+		t.Fatal(err)
+	}
+	base := filepath.Join(dir, "config.yml")
+	for path, body := range map[string]string{
+		base: `prompt_dir: " ./prompts/../prompts "
+server:
+  addr: :8080
+backends:
+  "team/blue~1":
+    endpoint: http://127.0.0.1:1/v1
+    api_key_env: SCRIPTORIUM_EXPLAIN_KEY
+    extra_params:
+      "0": base-parameter
+`,
+		filepath.Join(dir, "overlays", "local.yml"): `server:
+  addr: :9090
+backends:
+  "team/blue~1":
+    extra_params:
+      "0": overlay-parameter
+`,
+	} {
+		if err := os.WriteFile(path, []byte(body), 0o600); err != nil {
+			t.Fatal(err)
+		}
+	}
+	const keyValue = "synthetic-key-bytes-must-not-appear"
+	t.Setenv("SCRIPTORIUM_EXPLAIN_KEY", keyValue)
+	args := []string{"--config", base, "--config-overlay", "local", "--addr", ":9090"}
+	for _, tc := range []struct {
+		pointer string
+		want    []string
+	}{
+		{pointer: "/server/addr", want: []string{":8080", ":9090", "--addr"}},
+		{pointer: "/prompt_dir", want: []string{"normalized application path", "prompts"}},
+		{pointer: "/backends/team~1blue~01/extra_params/0", want: []string{"base-parameter", "overlay-parameter"}},
+		{pointer: "/backends/team~1blue~01/api_key_env", want: []string{"SCRIPTORIUM_EXPLAIN_KEY"}},
+		{pointer: "", want: []string{"base-parameter", "overlay-parameter", "SCRIPTORIUM_EXPLAIN_KEY"}},
+	} {
+		code, stdout, stderr := runCLICommand(t, configCommand, append([]string{"explain", "--path", tc.pointer}, args...))
+		if code != ExitOK || stderr != "" || strings.Contains(stdout, keyValue) {
+			t.Fatalf("explain %q failed or disclosed key: code=%d out=%q err=%q", tc.pointer, code, stdout, stderr)
+		}
+		for _, want := range tc.want {
+			if !strings.Contains(stdout, want) {
+				t.Fatalf("explain %q lacks %q: %q", tc.pointer, want, stdout)
+			}
+		}
+	}
+	if err := os.Unsetenv("SCRIPTORIUM_EXPLAIN_KEY"); err != nil {
+		t.Fatal(err)
+	}
+	code, stdout, stderr := runCLICommand(t, configCommand, append([]string{"explain", "--path", "/backends/team~1blue~01/api_key_env"}, args...))
+	if code != ExitOK || stderr != "" || !strings.Contains(stdout, "SCRIPTORIUM_EXPLAIN_KEY") || strings.Contains(stdout, keyValue) {
+		t.Fatalf("absent credential changed reference explanation: code=%d out=%q err=%q", code, stdout, stderr)
+	}
+}
+
+func TestConfigExplainRejectsUnknownOrMalformedPaths(t *testing.T) {
+	path := writeAppConfigFile(t, "{}\n")
+	for _, args := range [][]string{
+		{"explain", "--config", path},
+		{"explain", "--config", path, "--path", "not-a-pointer"},
+		{"explain", "--config", path, "--path", "/missing"},
+	} {
+		code, stdout, stderr := runCLICommand(t, configCommand, args)
+		if code != ExitRuntimeError || stdout != "" || stderr == "" {
+			t.Fatalf("invalid explanation path accepted: args=%q code=%d out=%q err=%q", args, code, stdout, stderr)
+		}
+	}
+	var stderr bytes.Buffer
+	if code := configCommand([]string{"explain", "--config", path, "--path", ""}, errorOutputWriter{}, &stderr); code != ExitRuntimeError || !strings.Contains(stderr.String(), "output error") {
+		t.Fatalf("explanation writer failure not reported: code=%d err=%q", code, stderr.String())
+	}
+}

internal/adapter/cli/inspect.go

@@ -0,0 +1,212 @@
+package cli
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"fmt"
+	"io"
+	"io/fs"
+	"path/filepath"
+	"strings"
+
+	configkit "gitea.maximumdirect.net/eric/ConfigKit"
+	"gitea.maximumdirect.net/eric/promptkit"
+	appformat "gitea.maximumdirect.net/eric/scriptorium/internal/format"
+)
+
+type promptInspectionConfig struct {
+	configPath, promptDir, promptID, promptVersion, outputPath string
+	configOverlay                                              string
+	configExplicit                                             bool
+	outputFormat                                               appformat.OutputFormat
+	overrides                                                  []configkit.Override
+	diagnostics                                                []configkit.Diagnostic
+}
+
+type profileInspectionConfig struct {
+	configPath, profileDir, profileID, outputPath string
+	configOverlay                                 string
+	configExplicit                                bool
+	outputFormat                                  appformat.OutputFormat
+	overrides                                     []configkit.Override
+	diagnostics                                   []configkit.Diagnostic
+}
+
+// emptyPromptDefinitionFS satisfies Promptkit's engine-level prompt-source
+// requirement without exposing the caller's working directory. Profile
+// inspection never reads this source.
+type emptyPromptDefinitionFS struct{}
+
+func (emptyPromptDefinitionFS) Open(name string) (fs.File, error) {
+	return nil, &fs.PathError{Op: "open", Path: name, Err: fs.ErrNotExist}
+}
+
+func inspectCommand(args []string, stdout, stderr io.Writer) int {
+	if len(args) == 0 {
+		fmt.Fprintln(stderr, "inspect parse error: inspection mode is required")
+		return ExitRuntimeError
+	}
+	if args[0] == "profile" {
+		return inspectProfileCommand(args[1:], stdout, stderr)
+	}
+	if args[0] != "prompt" {
+		fmt.Fprintln(stderr, "inspect parse error: unknown inspection mode")
+		return ExitRuntimeError
+	}
+	cfg, err := parsePromptInspectionArgs(args[1:])
+	if err != nil {
+		writeApplicationError(stderr, "inspect parse", err)
+		return ExitRuntimeError
+	}
+	settings, err := resolveAppSettingsForPromptInspection(cfg)
+	if err != nil {
+		writeApplicationError(stderr, "inspect", err)
+		return ExitRuntimeError
+	}
+	if err := writeApplicationWarnings(stderr, cfg.diagnostics); err != nil {
+		return ExitRuntimeError
+	}
+	engine, err := newEngine(settings)
+	if err != nil {
+		fmt.Fprintf(stderr, "engine error: %v\n", err)
+		return ExitRuntimeError
+	}
+	inspection, err := engine.InspectPrompt(context.Background(), cfg.promptID, cfg.promptVersion)
+	if err != nil {
+		fmt.Fprintf(stderr, "inspect error: %v\n", err)
+		return ExitRuntimeError
+	}
+	data, err := appformat.FormatPromptInspection(inspection, cfg.outputFormat)
+	if err != nil {
+		fmt.Fprintf(stderr, "inspect error: %v\n", err)
+		return ExitRuntimeError
+	}
+	if err := writeOutput(stdout, cfg.outputPath, data); err != nil {
+		fmt.Fprintf(stderr, "output write error: %v\n", err)
+		return ExitRuntimeError
+	}
+	return ExitOK
+}
+
+func inspectProfileCommand(args []string, stdout, stderr io.Writer) int {
+	cfg, err := parseProfileInspectionArgs(args)
+	if err != nil {
+		writeApplicationError(stderr, "inspect parse", err)
+		return ExitRuntimeError
+	}
+	settings, err := resolveAppSettingsForProfileInspection(cfg)
+	if err != nil {
+		writeApplicationError(stderr, "inspect", err)
+		return ExitRuntimeError
+	}
+	if err := writeApplicationWarnings(stderr, cfg.diagnostics); err != nil {
+		return ExitRuntimeError
+	}
+	engine, err := newEngine(settings, promptkit.WithPromptFS(emptyPromptDefinitionFS{}, "."))
+	if err != nil {
+		fmt.Fprintf(stderr, "engine error: %v\n", err)
+		return ExitRuntimeError
+	}
+	inspection, err := engine.InspectProfile(context.Background(), cfg.profileID)
+	if err != nil {
+		fmt.Fprintf(stderr, "inspect error: %v\n", err)
+		return ExitRuntimeError
+	}
+	data, err := appformat.FormatProfileInspection(inspection, cfg.outputFormat)
+	if err != nil {
+		fmt.Fprintf(stderr, "inspect error: %v\n", err)
+		return ExitRuntimeError
+	}
+	if err := writeOutput(stdout, cfg.outputPath, data); err != nil {
+		fmt.Fprintf(stderr, "output write error: %v\n", err)
+		return ExitRuntimeError
+	}
+	return ExitOK
+}
+
+func parseProfileInspectionArgs(args []string) (*profileInspectionConfig, error) {
+	cfg := &profileInspectionConfig{outputFormat: appformat.DefaultOutputFormat}
+	fs := flag.NewFlagSet("inspect profile", flag.ContinueOnError)
+	fs.SetOutput(io.Discard)
+	registerConfigSelectionFlags(fs, &cfg.configPath, &cfg.configOverlay)
+	fs.StringVar(&cfg.profileDir, "profile-dir", "", "directory containing execution profiles")
+	fs.StringVar(&cfg.profileID, "profile", "", "profile ID to inspect")
+	rawFormat := ""
+	fs.StringVar(&rawFormat, "format", "", "output format: text or json")
+	fs.StringVar(&cfg.outputPath, "out", "", "optional output file path")
+	if err := fs.Parse(args); err != nil {
+		return nil, err
+	}
+	cfg.configExplicit = flagWasSet(fs, "config")
+	cfg.overrides = applicationOverrides(fs)
+	if fs.NArg() > 0 {
+		return nil, fmt.Errorf("unexpected positional args: %v", fs.Args())
+	}
+	if strings.TrimSpace(cfg.profileID) == "" {
+		return nil, errors.New("--profile is required")
+	}
+	format, err := appformat.ParseOutputFormat(rawFormat)
+	if err != nil {
+		return nil, err
+	}
+	cfg.outputFormat = format
+	if cfg.outputPath != "" {
+		cfg.outputPath = filepath.Clean(cfg.outputPath)
+	}
+	return cfg, nil
+}
+
+func resolveAppSettingsForProfileInspection(cfg *profileInspectionConfig) (engineSettings, error) {
+	settings, diagnostics, err := loadApplicationSettings(cfg.configPath, cfg.configOverlay, cfg.configExplicit, cfg.overrides)
+	if err != nil {
+		return engineSettings{}, err
+	}
+	cfg.diagnostics = diagnostics
+	return engineSettings{profileDir: settings.ProfileDir, backends: settings.Backends, transientRetries: settings.TransientRetries}, nil
+}
+
+func parsePromptInspectionArgs(args []string) (*promptInspectionConfig, error) {
+	cfg := &promptInspectionConfig{outputFormat: appformat.DefaultOutputFormat}
+	fs := flag.NewFlagSet("inspect prompt", flag.ContinueOnError)
+	fs.SetOutput(io.Discard)
+	registerConfigSelectionFlags(fs, &cfg.configPath, &cfg.configOverlay)
+	fs.StringVar(&cfg.promptDir, "prompt-dir", "", "directory containing prompt definitions")
+	fs.StringVar(&cfg.promptID, "prompt", "", "prompt ID to inspect")
+	fs.StringVar(&cfg.promptVersion, "prompt-version", "", "optional prompt version")
+	rawFormat := ""
+	fs.StringVar(&rawFormat, "format", "", "output format: text or json")
+	fs.StringVar(&cfg.outputPath, "out", "", "optional output file path")
+	if err := fs.Parse(args); err != nil {
+		return nil, err
+	}
+	cfg.configExplicit = flagWasSet(fs, "config")
+	cfg.overrides = applicationOverrides(fs)
+	if fs.NArg() > 0 {
+		return nil, fmt.Errorf("unexpected positional args: %v", fs.Args())
+	}
+	if strings.TrimSpace(cfg.promptID) == "" {
+		return nil, errors.New("--prompt is required")
+	}
+	format, err := appformat.ParseOutputFormat(rawFormat)
+	if err != nil {
+		return nil, err
+	}
+	cfg.outputFormat = format
+	if cfg.outputPath != "" {
+		cfg.outputPath = filepath.Clean(cfg.outputPath)
+	}
+	return cfg, nil
+}
+
+func resolveAppSettingsForPromptInspection(cfg *promptInspectionConfig) (engineSettings, error) {
+	settings, diagnostics, err := loadApplicationSettings(cfg.configPath, cfg.configOverlay, cfg.configExplicit, cfg.overrides)
+	if err != nil {
+		return engineSettings{}, err
+	}
+	cfg.diagnostics = diagnostics
+	if strings.TrimSpace(settings.PromptDir) == "" {
+		return engineSettings{}, errors.New(errPromptDirRequired)
+	}
+	return engineSettings{promptDir: settings.PromptDir, backends: settings.Backends, transientRetries: settings.TransientRetries}, nil
+}

internal/adapter/cli/run.go

@@ -2,6 +2,7 @@ package cli
 
 import (
 	"context"
+	"encoding/json"
 	"errors"
 	"flag"
 	"fmt"
@@ -12,11 +13,13 @@ import (
 	"strings"
 	"time"
 
-	"gitea.maximumdirect.net/eric/scriptorium"
+	configkit "gitea.maximumdirect.net/eric/ConfigKit"
+	"gitea.maximumdirect.net/eric/promptkit"
 	httpadapter "gitea.maximumdirect.net/eric/scriptorium/internal/adapter/http"
 	appconfig "gitea.maximumdirect.net/eric/scriptorium/internal/config"
 	"gitea.maximumdirect.net/eric/scriptorium/internal/defaults"
 	renderformat "gitea.maximumdirect.net/eric/scriptorium/internal/format"
+	executionreport "gitea.maximumdirect.net/eric/scriptorium/internal/report"
 )
 
 const (
@@ -35,18 +38,28 @@ type runConfig struct {
 	promptDir                  string
 	profileDir                 string
 	promptID                   string
+	promptVersion              string
 	profileID                  string
+	sessionID                  string
 	inputRaw                   listFlag
 	varRaw                     listFlag
 	outputPath                 string
+	executionReportPath        string
 	llmBaseURL                 string
 	apiKeyEnv                  string
 	model                      string
 	temperature                float64
 	maxTokens                  int
 	topP                       float64
+	reasoningEffort            string
 	schemaDir                  string
+	backends                   []appconfig.BackendSettings
 	timeout                    time.Duration
+	runTimeout                 time.Duration
+	transientRetries           int
+	configuredTransientRetries *int
+	diagnostics                []configkit.Diagnostic
+	configOverlay              string
 
 	defaultRenderFormat renderformat.PreparedRunOutputFormat
 
@@ -56,7 +69,9 @@ type runConfig struct {
 	temperatureSet      bool
 	maxTokensSet        bool
 	topPSet             bool
+	reasoningEffortSet  bool
 	timeoutSet          bool
+	transientRetriesSet bool
 }
 
 type renderConfig struct {
@@ -75,6 +90,10 @@ type serveConfig struct {
 	maxRequestBytes  int64
 	maxArtifactBytes int64
 	maxResponseBytes int64
+	backends         []appconfig.BackendSettings
+	transientRetries *int
+	diagnostics      []configkit.Diagnostic
+	configOverlay    string
 }
 
 type commonCommandSettings struct {
@@ -87,6 +106,9 @@ type commonCommandSettings struct {
 	maxArtifactBytes    int64
 	maxResponseBytes    int64
 	defaultRenderFormat renderformat.PreparedRunOutputFormat
+	backends            []appconfig.BackendSettings
+	transientRetries    *int
+	diagnostics         []configkit.Diagnostic
 }
 
 type listFlag []string
@@ -113,6 +135,10 @@ func Run(args []string, stdout, stderr io.Writer) int {
 		return renderCommand(args[1:], stdout, stderr)
 	case "serve":
 		return serveCommand(args[1:], stderr)
+	case "inspect":
+		return inspectCommand(args[1:], stdout, stderr)
+	case "config":
+		return configCommand(args[1:], stdout, stderr)
 	default:
 		fmt.Fprintf(stderr, "unknown command %q\n", args[0])
 		printUsage(stderr)
@@ -123,7 +149,10 @@ func Run(args []string, stdout, stderr io.Writer) int {
 func runCommand(args []string, stdout, stderr io.Writer) int {
 	cfg, err := parseRunArgs(args)
 	if err != nil {
-		fmt.Fprintf(stderr, "run parse error: %v\n", err)
+		writeApplicationError(stderr, "run parse", err)
+		return ExitRuntimeError
+	}
+	if err := writeApplicationWarnings(stderr, cfg.diagnostics); err != nil {
 		return ExitRuntimeError
 	}
 
@@ -133,20 +162,53 @@ func runCommand(args []string, stdout, stderr io.Writer) int {
 		return ExitRuntimeError
 	}
 
-	engine, err := newEngine(cfg)
+	engine, err := newEngine(cfg.engineSettings())
 	if err != nil {
 		fmt.Fprintf(stderr, "engine error: %v\n", err)
 		return ExitRuntimeError
 	}
+	return executeRun(cfg, req, engine.Run, stdout, stderr)
+}
 
-	res, runErr := engine.Run(context.Background(), req)
+func executeRun(cfg *runConfig, req promptkit.RunRequest, run func(context.Context, promptkit.RunRequest) (*promptkit.RunResult, error), stdout, stderr io.Writer) int {
+	var collector *executionreport.Collector
+	if cfg.executionReportPath != "" {
+		collector = executionreport.NewCollector()
+		req.Observer = collector.Observe
+	}
+	runContext := context.Background()
+	cancel := func() {}
+	if cfg.runTimeout > 0 {
+		runContext, cancel = context.WithTimeout(runContext, cfg.runTimeout)
+	}
+	res, runErr := run(runContext, req)
+	contextErr := runContext.Err()
+	cancel()
 	if runErr != nil {
-		fmt.Fprintf(stderr, "run error: %v\n", runErr)
+		if errors.Is(contextErr, context.DeadlineExceeded) {
-		return ExitRuntimeError
+			fmt.Fprintln(stderr, "run error: execution deadline exceeded")
+		} else {
+			fmt.Fprintln(stderr, runErrorMessage(runErr))
+		}
 	}
 
+	outputFailed := false
+	if runErr == nil {
 		if err := writeOutput(stdout, cfg.outputPath, res.Artifact.Body); err != nil {
 			fmt.Fprintf(stderr, "output write error: %v\n", err)
+			outputFailed = true
+		}
+	}
+	reportFailed := false
+	if collector != nil {
+		if value := collector.Snapshot(); value == nil {
+			fmt.Fprintln(stderr, "execution report not produced: no terminal observation")
+		} else if err := writeExecutionReport(cfg.executionReportPath, value); err != nil {
+			fmt.Fprintf(stderr, "execution report write error: %v\n", err)
+			reportFailed = true
+		}
+	}
+	if runErr != nil || outputFailed || reportFailed {
 		return ExitRuntimeError
 	}
 
@@ -154,10 +216,21 @@ func runCommand(args []string, stdout, stderr io.Writer) int {
 	return determineExitCode(nil, res)
 }
 
+func writeExecutionReport(path string, value *executionreport.Execution) error {
+	data, err := json.Marshal(value)
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(path, append(data, '\n'), 0644)
+}
+
 func renderCommand(args []string, stdout, stderr io.Writer) int {
 	cfg, err := parseRenderArgs(args)
 	if err != nil {
-		fmt.Fprintf(stderr, "render parse error: %v\n", err)
+		writeApplicationError(stderr, "render parse", err)
+		return ExitRuntimeError
+	}
+	if err := writeApplicationWarnings(stderr, cfg.diagnostics); err != nil {
 		return ExitRuntimeError
 	}
 
@@ -167,7 +240,7 @@ func renderCommand(args []string, stdout, stderr io.Writer) int {
 		return ExitRuntimeError
 	}
 
-	engine, err := newEngine(&cfg.runConfig)
+	engine, err := newEngine(cfg.runConfig.engineSettings())
 	if err != nil {
 		fmt.Fprintf(stderr, "engine error: %v\n", err)
 		return ExitRuntimeError
@@ -195,7 +268,10 @@ func renderCommand(args []string, stdout, stderr io.Writer) int {
 func serveCommand(args []string, stderr io.Writer) int {
 	cfg, err := parseServeArgs(args)
 	if err != nil {
-		fmt.Fprintf(stderr, "serve parse error: %v\n", err)
+		writeApplicationError(stderr, "serve parse", err)
+		return ExitRuntimeError
+	}
+	if err := writeApplicationWarnings(stderr, cfg.diagnostics); err != nil {
 		return ExitRuntimeError
 	}
 
@@ -205,11 +281,7 @@ func serveCommand(args []string, stderr io.Writer) int {
 		return ExitRuntimeError
 	}
 
-	engine, err := newEngine(&runConfig{
+	engine, err := newEngine(cfg.engineSettings(), promptkit.WithArtifactReader(artifactReader))
-		promptDir:  cfg.promptDir,
-		profileDir: cfg.profileDir,
-		schemaDir:  cfg.schemaDir,
-	}, scriptorium.WithArtifactReader(artifactReader))
 	if err != nil {
 		fmt.Fprintf(stderr, "engine error: %v\n", err)
 		return ExitRuntimeError
@@ -238,9 +310,11 @@ func parseRunArgs(args []string) (*runConfig, error) {
 	fs := flag.NewFlagSet("run", flag.ContinueOnError)
 	fs.SetOutput(io.Discard)
 
-	registerConfigPathFlag(fs, &cfg.configPath)
+	registerConfigSelectionFlags(fs, &cfg.configPath, &cfg.configOverlay)
 	registerExecutionRequestFlags(fs, cfg)
 	fs.StringVar(&cfg.schemaDir, "schema-dir", "", "base directory for validation schemas")
+	fs.DurationVar(&cfg.runTimeout, "run-timeout", 0, "whole-run execution deadline")
+	fs.StringVar(&cfg.executionReportPath, "execution-report", "", "JSON execution report file path")
 
 	if err := fs.Parse(args); err != nil {
 		return nil, err
@@ -248,11 +322,44 @@ func parseRunArgs(args []string) (*runConfig, error) {
 	if err := finalizeExecutionRequestConfig(fs, cfg); err != nil {
 		return nil, err
 	}
-	cfg.schemaDir = filepath.Clean(cfg.schemaDir)
+	if cfg.runTimeout < 0 {
-
+		return nil, errors.New("--run-timeout must be greater than or equal to 0")
+	}
+	if flagWasSet(fs, "execution-report") {
+		if cfg.executionReportPath == "" {
+			return nil, errors.New("--execution-report requires a nonempty path")
+		}
+		cfg.executionReportPath = filepath.Clean(cfg.executionReportPath)
+		if cfg.outputPath != "" {
+			collision, err := outputPathsCollide(cfg.outputPath, cfg.executionReportPath)
+			if err != nil {
+				return nil, err
+			}
+			if collision {
+				return nil, errors.New("--out and --execution-report select the same file")
+			}
+		}
+	}
 	return cfg, nil
 }
 
+func outputPathsCollide(first, second string) (bool, error) {
+	firstAbs, err := filepath.Abs(first)
+	if err != nil {
+		return false, err
+	}
+	secondAbs, err := filepath.Abs(second)
+	if err != nil {
+		return false, err
+	}
+	if firstAbs == secondAbs {
+		return true, nil
+	}
+	firstInfo, firstErr := os.Stat(firstAbs)
+	secondInfo, secondErr := os.Stat(secondAbs)
+	return firstErr == nil && secondErr == nil && os.SameFile(firstInfo, secondInfo), nil
+}
+
 func parseRenderArgs(args []string) (*renderConfig, error) {
 	cfg := &renderConfig{
 		outputFormat: renderformat.DefaultPreparedRunOutputFormat,
@@ -260,8 +367,9 @@ func parseRenderArgs(args []string) (*renderConfig, error) {
 	fs := flag.NewFlagSet("render", flag.ContinueOnError)
 	fs.SetOutput(io.Discard)
 
-	registerConfigPathFlag(fs, &cfg.configPath)
+	registerConfigSelectionFlags(fs, &cfg.configPath, &cfg.configOverlay)
 	registerExecutionRequestFlags(fs, &cfg.runConfig)
+	fs.StringVar(&cfg.schemaDir, "schema-dir", "", "base directory for validation schemas")
 
 	var rawFormat string
 	fs.StringVar(&rawFormat, "format", "", "render output format (text|json)")
@@ -290,7 +398,7 @@ func parseServeArgs(args []string) (*serveConfig, error) {
 	fs := flag.NewFlagSet("serve", flag.ContinueOnError)
 	fs.SetOutput(io.Discard)
 
-	registerConfigPathFlag(fs, &cfg.configPath)
+	registerConfigSelectionFlags(fs, &cfg.configPath, &cfg.configOverlay)
 	fs.StringVar(&cfg.addr, "addr", "", "HTTP listen address")
 	fs.StringVar(&cfg.promptDir, "prompt-dir", "", "directory containing prompt definition YAML files")
 	fs.StringVar(&cfg.profileDir, "profile-dir", "", "directory containing execution profile YAML files")
@@ -307,16 +415,7 @@ func parseServeArgs(args []string) (*serveConfig, error) {
 		return nil, fmt.Errorf("unexpected positional args: %v", fs.Args())
 	}
 
-	settings, err := resolveCommonSettings(fs, cfg.configPath, appconfig.CLIOverrides{
+	settings, err := resolveCommonSettings(fs, cfg.configPath, cfg.configOverlay)
-		PromptDir:        cfg.promptDirIfSet(fs),
-		ProfileDir:       cfg.profileDirIfSet(fs),
-		SchemaDir:        cfg.schemaDirIfSet(fs),
-		ServerAddr:       cfg.addrIfSet(fs),
-		ArtifactRoot:     cfg.artifactRootIfSet(fs),
-		MaxRequestBytes:  cfg.maxRequestBytesIfSet(fs),
-		MaxArtifactBytes: cfg.maxArtifactBytesIfSet(fs),
-		MaxResponseBytes: cfg.maxResponseBytesIfSet(fs),
-	})
 	if err != nil {
 		return nil, err
 	}
@@ -329,19 +428,14 @@ func parseServeArgs(args []string) (*serveConfig, error) {
 	cfg.maxRequestBytes = settings.maxRequestBytes
 	cfg.maxArtifactBytes = settings.maxArtifactBytes
 	cfg.maxResponseBytes = settings.maxResponseBytes
+	cfg.backends = settings.backends
+	cfg.transientRetries = settings.transientRetries
+	cfg.diagnostics = settings.diagnostics
 
 	if err := validateRequiredLibraryDirs(cfg.promptDir); err != nil {
 		return nil, err
 	}
 
-	cfg.promptDir = filepath.Clean(cfg.promptDir)
-	if strings.TrimSpace(cfg.profileDir) != "" {
-		cfg.profileDir = filepath.Clean(cfg.profileDir)
-	}
-	cfg.schemaDir = filepath.Clean(cfg.schemaDir)
-	if strings.TrimSpace(cfg.artifactRoot) != "" {
-		cfg.artifactRoot = filepath.Clean(cfg.artifactRoot)
-	}
 	return cfg, nil
 }
 
@@ -349,7 +443,9 @@ func registerExecutionRequestFlags(fs *flag.FlagSet, cfg *runConfig) {
 	fs.StringVar(&cfg.promptDir, "prompt-dir", "", "directory containing prompt definition YAML files")
 	fs.StringVar(&cfg.profileDir, "profile-dir", "", "directory containing execution profile YAML files")
 	fs.StringVar(&cfg.promptID, "prompt", "", "prompt ID to run")
+	fs.StringVar(&cfg.promptVersion, "prompt-version", "", "optional prompt definition version")
 	fs.StringVar(&cfg.profileID, "profile", "", "optional execution profile ID; if omitted, prompt default_profile is used")
+	fs.StringVar(&cfg.sessionID, "session-id", "", "optional session ID")
 	fs.Var(&cfg.inputRaw, "input", "input mapping(s): name=path (repeatable, comma-separated)")
 	fs.Var(&cfg.varRaw, "var", "variable mapping(s): name=value (repeatable, comma-separated)")
 	fs.StringVar(&cfg.outputPath, "out", "", "optional output file path")
@@ -359,7 +455,9 @@ func registerExecutionRequestFlags(fs *flag.FlagSet, cfg *runConfig) {
 	fs.Float64Var(&cfg.temperature, "temperature", 0, "optional temperature override")
 	fs.IntVar(&cfg.maxTokens, "max-tokens", 0, "optional max tokens override")
 	fs.Float64Var(&cfg.topP, "top-p", 0, "optional top_p override")
-	fs.DurationVar(&cfg.timeout, "timeout", defaults.LLMRequestTimeoutDefault, "LLM request timeout")
+	fs.StringVar(&cfg.reasoningEffort, "reasoning-effort", "", "optional reasoning effort override")
+	fs.DurationVar(&cfg.timeout, "timeout", 0, "LLM request timeout")
+	fs.IntVar(&cfg.transientRetries, "transient-retries", 0, "additional transient generation attempts")
 	fs.StringVar(&cfg.promptID, "prompt-id", "", "deprecated alias for --prompt")
 	fs.StringVar(&cfg.profileID, "profile-id", "", "deprecated alias for --profile")
 }
@@ -369,11 +467,7 @@ func finalizeExecutionRequestConfig(fs *flag.FlagSet, cfg *runConfig) error {
 		return fmt.Errorf("unexpected positional args: %v", fs.Args())
 	}
 
-	settings, err := resolveCommonSettings(fs, cfg.configPath, appconfig.CLIOverrides{
+	settings, err := resolveCommonSettings(fs, cfg.configPath, cfg.configOverlay)
-		PromptDir:  cfg.promptDirIfSet(fs),
-		ProfileDir: cfg.profileDirIfSet(fs),
-		SchemaDir:  cfg.schemaDirIfSet(fs),
-	})
 	if err != nil {
 		return err
 	}
@@ -382,6 +476,9 @@ func finalizeExecutionRequestConfig(fs *flag.FlagSet, cfg *runConfig) error {
 	cfg.profileDir = settings.profileDir
 	cfg.schemaDir = settings.schemaDir
 	cfg.defaultRenderFormat = settings.defaultRenderFormat
+	cfg.backends = settings.backends
+	cfg.configuredTransientRetries = settings.transientRetries
+	cfg.diagnostics = settings.diagnostics
 
 	if err := validateRequiredLibraryDirs(cfg.promptDir); err != nil {
 		return err
@@ -389,13 +486,6 @@ func finalizeExecutionRequestConfig(fs *flag.FlagSet, cfg *runConfig) error {
 	if strings.TrimSpace(cfg.promptID) == "" {
 		return errors.New("--prompt is required")
 	}
-	if len(cfg.inputRaw) == 0 {
-		return errors.New("at least one --input is required")
-	}
-	cfg.promptDir = filepath.Clean(cfg.promptDir)
-	if strings.TrimSpace(cfg.profileDir) != "" {
-		cfg.profileDir = filepath.Clean(cfg.profileDir)
-	}
 	if cfg.outputPath != "" {
 		cfg.outputPath = filepath.Clean(cfg.outputPath)
 	}
@@ -405,88 +495,16 @@ func finalizeExecutionRequestConfig(fs *flag.FlagSet, cfg *runConfig) error {
 	cfg.temperatureSet = flagWasSet(fs, "temperature")
 	cfg.maxTokensSet = flagWasSet(fs, "max-tokens")
 	cfg.topPSet = flagWasSet(fs, "top-p")
+	cfg.reasoningEffortSet = flagWasSet(fs, "reasoning-effort")
 	cfg.timeoutSet = flagWasSet(fs, "timeout")
-	return nil
+	cfg.transientRetriesSet = flagWasSet(fs, "transient-retries")
-}
+	if cfg.transientRetriesSet && cfg.transientRetries < 0 {
-
+		return errors.New("--transient-retries must be greater than or equal to 0")
-func (c *runConfig) promptDirIfSet(fs *flag.FlagSet) string {
-	if flagWasSet(fs, "prompt-dir") {
-		return c.promptDir
-	}
-	return ""
-}
-
-func (c *runConfig) profileDirIfSet(fs *flag.FlagSet) string {
-	if flagWasSet(fs, "profile-dir") {
-		return c.profileDir
-	}
-	return ""
-}
-
-func (c *runConfig) schemaDirIfSet(fs *flag.FlagSet) string {
-	if flagWasSet(fs, "schema-dir") {
-		return c.schemaDir
-	}
-	return ""
-}
-
-func (c *serveConfig) promptDirIfSet(fs *flag.FlagSet) string {
-	if flagWasSet(fs, "prompt-dir") {
-		return c.promptDir
-	}
-	return ""
-}
-
-func (c *serveConfig) profileDirIfSet(fs *flag.FlagSet) string {
-	if flagWasSet(fs, "profile-dir") {
-		return c.profileDir
-	}
-	return ""
-}
-
-func (c *serveConfig) schemaDirIfSet(fs *flag.FlagSet) string {
-	if flagWasSet(fs, "schema-dir") {
-		return c.schemaDir
-	}
-	return ""
-}
-
-func (c *serveConfig) addrIfSet(fs *flag.FlagSet) string {
-	if flagWasSet(fs, "addr") {
-		return c.addr
-	}
-	return ""
-}
-
-func (c *serveConfig) artifactRootIfSet(fs *flag.FlagSet) string {
-	if flagWasSet(fs, "artifact-root") {
-		return c.artifactRoot
-	}
-	return ""
-}
-
-func (c *serveConfig) maxRequestBytesIfSet(fs *flag.FlagSet) *int64 {
-	if flagWasSet(fs, "max-request-bytes") {
-		return &c.maxRequestBytes
 	}
 	return nil
 }
 
-func (c *serveConfig) maxArtifactBytesIfSet(fs *flag.FlagSet) *int64 {
+func registerConfigSelectionFlags(fs *flag.FlagSet, target, overlay *string) {
-	if flagWasSet(fs, "max-artifact-bytes") {
-		return &c.maxArtifactBytes
-	}
-	return nil
-}
-
-func (c *serveConfig) maxResponseBytesIfSet(fs *flag.FlagSet) *int64 {
-	if flagWasSet(fs, "max-response-bytes") {
-		return &c.maxResponseBytes
-	}
-	return nil
-}
-
-func registerConfigPathFlag(fs *flag.FlagSet, target *string) {
 	fs.StringVar(
 		target,
 		"config",
@@ -497,24 +515,11 @@ func registerConfigPathFlag(fs *flag.FlagSet, target *string) {
 			appconfig.DefaultConfigPath,
 		),
 	)
+	fs.StringVar(overlay, "config-overlay", "", "selected application configuration overlay")
 }
 
-func resolveAppSettings(fs *flag.FlagSet, configPath string, overrides appconfig.CLIOverrides) (appconfig.AppSettings, error) {
+func resolveCommonSettings(fs *flag.FlagSet, configPath, overlay string) (commonCommandSettings, error) {
-	settings, err := appconfig.LoadConfig(configPath, flagWasSet(fs, "config"))
+	settings, diagnostics, err := loadApplicationSettings(configPath, overlay, flagWasSet(fs, "config"), applicationOverrides(fs))
-	if err != nil {
-		return appconfig.AppSettings{}, fmt.Errorf("application config error: %w", err)
-	}
-
-	merged, err := appconfig.ApplyCLIOverrides(settings, overrides)
-	if err != nil {
-		return appconfig.AppSettings{}, fmt.Errorf("application config error: %w", err)
-	}
-
-	return merged, nil
-}
-
-func resolveCommonSettings(fs *flag.FlagSet, configPath string, overrides appconfig.CLIOverrides) (commonCommandSettings, error) {
-	settings, err := resolveAppSettings(fs, configPath, overrides)
 	if err != nil {
 		return commonCommandSettings{}, err
 	}
@@ -528,6 +533,9 @@ func resolveCommonSettings(fs *flag.FlagSet, configPath string, overrides appcon
 		maxArtifactBytes:    settings.MaxArtifactBytes,
 		maxResponseBytes:    settings.MaxResponseBytes,
 		defaultRenderFormat: settings.DefaultRenderFormat,
+		backends:            settings.Backends,
+		transientRetries:    settings.TransientRetries,
+		diagnostics:         diagnostics,
 	}, nil
 }
 
@@ -538,36 +546,76 @@ func validateRequiredLibraryDirs(promptDir string) error {
 	return nil
 }
 
-func newEngine(cfg *runConfig, options ...scriptorium.Option) (*scriptorium.Engine, error) {
+type engineSettings struct {
-	return scriptorium.NewEngine(scriptorium.Config{
+	promptDir        string
-		PromptDir:  cfg.promptDir,
+	profileDir       string
-		ProfileDir: cfg.profileDir,
+	schemaDir        string
-		SchemaDir:  cfg.schemaDir,
+	backends         []appconfig.BackendSettings
-	}, options...)
+	transientRetries *int
 }
 
-func buildRunRequestFromConfig(cfg *runConfig) (scriptorium.RunRequest, error) {
+func (c runConfig) engineSettings() engineSettings {
-	inputMappings, err := parseMappings(cfg.inputRaw, false)
+	return engineSettings{promptDir: c.promptDir, profileDir: c.profileDir, schemaDir: c.schemaDir, backends: c.backends, transientRetries: c.configuredTransientRetries}
+}
+
+func (c serveConfig) engineSettings() engineSettings {
+	return engineSettings{promptDir: c.promptDir, profileDir: c.profileDir, schemaDir: c.schemaDir, backends: c.backends, transientRetries: c.transientRetries}
+}
+
+func newEngine(settings engineSettings, options ...promptkit.Option) (*promptkit.Engine, error) {
+	engineOptions := make([]promptkit.Option, 0, len(settings.backends)+len(options))
+	for _, configured := range settings.backends {
+		engineOptions = append(engineOptions, promptkit.WithBackend(promptkit.Backend{
+			ID:               configured.ID,
+			Endpoint:         configured.Endpoint,
+			APIKeyEnv:        configured.APIKeyEnv,
+			ExtraParams:      configured.ExtraParams,
+			ConcurrencyLimit: configured.ConcurrencyLimit,
+			QueueCapacity:    configured.QueueCapacity,
+		}))
+	}
+	engineOptions = append(engineOptions, options...)
+	engine, err := promptkit.NewEngine(promptkit.Config{
+		PromptDir:        settings.promptDir,
+		ProfileDir:       settings.profileDir,
+		SchemaDir:        settings.schemaDir,
+		TransientRetries: settings.transientRetries,
+	}, engineOptions...)
 	if err != nil {
-		return scriptorium.RunRequest{}, fmt.Errorf("input parse error: %w", err)
+		return nil, fmt.Errorf("engine initialization from application configuration: %w", err)
+	}
+	return engine, nil
+}
+
+func buildRunRequestFromConfig(cfg *runConfig) (promptkit.RunRequest, error) {
+	var inputMappings map[string]string
+	var err error
+	if len(cfg.inputRaw) > 0 {
+		inputMappings, err = parseMappings(cfg.inputRaw, false)
+		if err != nil {
+			return promptkit.RunRequest{}, fmt.Errorf("input parse error: %w", err)
+		}
 	}
 
 	varMappings := map[string]string{}
 	if len(cfg.varRaw) > 0 {
 		varMappings, err = parseMappings(cfg.varRaw, false)
 		if err != nil {
-			return scriptorium.RunRequest{}, fmt.Errorf("var parse error: %w", err)
+			return promptkit.RunRequest{}, fmt.Errorf("var parse error: %w", err)
 		}
 	}
 
-	inputs := make(map[string]scriptorium.ArtifactRef, len(inputMappings))
+	var inputs map[string]promptkit.ArtifactRef
+	if len(inputMappings) > 0 {
+		inputs = make(map[string]promptkit.ArtifactRef, len(inputMappings))
 		for name, path := range inputMappings {
-		inputs[name] = scriptorium.File(path)
+			inputs[name] = promptkit.File(path)
+		}
 	}
 
-	var modelOverride *scriptorium.ExecutionTargetOverride
+	var modelOverride *promptkit.ExecutionTargetOverride
-	if cfg.llmBaseURLSet || cfg.modelSet || cfg.temperatureSet || cfg.maxTokensSet || cfg.topPSet || cfg.apiKeyEnvSet || cfg.timeoutSet {
+	if cfg.llmBaseURLSet || cfg.modelSet || cfg.temperatureSet || cfg.maxTokensSet || cfg.topPSet || cfg.reasoningEffortSet || cfg.apiKeyEnvSet || cfg.timeoutSet {
-		modelOverride = &scriptorium.ExecutionTargetOverride{
+		modelOverride = &promptkit.ExecutionTargetOverride{
 			Endpoint:  cfg.llmBaseURL,
 			Model:     cfg.model,
 			APIKeyEnv: cfg.apiKeyEnv,
@@ -581,18 +629,28 @@ func buildRunRequestFromConfig(cfg *runConfig) (scriptorium.RunRequest, error) {
 		if cfg.topPSet {
 			modelOverride.TopP = &cfg.topP
 		}
+		if cfg.reasoningEffortSet {
+			modelOverride.ReasoningEffort = &cfg.reasoningEffort
+		}
 		if cfg.timeoutSet {
 			timeoutSeconds := int(cfg.timeout.Seconds())
 			modelOverride.TimeoutSeconds = &timeoutSeconds
 		}
 	}
 
-	return scriptorium.RunRequest{
+	var transientRetries *int
+	if cfg.transientRetriesSet {
+		transientRetries = &cfg.transientRetries
+	}
+	return promptkit.RunRequest{
 		PromptID:         cfg.promptID,
+		PromptVersion:    cfg.promptVersion,
 		ProfileID:        cfg.profileID,
+		SessionID:        cfg.sessionID,
 		Inputs:           inputs,
 		Vars:             varMappings,
 		Execution:        modelOverride,
+		TransientRetries: transientRetries,
 	}, nil
 }
 
@@ -651,17 +709,17 @@ func writeOutput(stdout io.Writer, outputPath string, body []byte) error {
 	return os.WriteFile(outputPath, body, 0644)
 }
 
-func determineExitCode(runErr error, result *scriptorium.RunResult) int {
+func determineExitCode(runErr error, result *promptkit.RunResult) int {
 	if runErr != nil {
 		return ExitRuntimeError
 	}
-	if result != nil && result.Validation.Status == scriptorium.ValidationFailed {
+	if result != nil && result.Validation.Status == promptkit.ValidationFailed {
 		return ExitValidationFailed
 	}
 	return ExitOK
 }
 
-func printSummary(stderr io.Writer, res *scriptorium.RunResult) {
+func printSummary(stderr io.Writer, res *promptkit.RunResult) {
 	if res == nil {
 		return
 	}
@@ -682,12 +740,25 @@ func printSummary(stderr io.Writer, res *scriptorium.RunResult) {
 	if res.Usage.CachedTokens != 0 || res.Usage.CacheWriteTokens != 0 {
 		fmt.Fprintf(stderr, " cached_tokens=%d cache_write_tokens=%d", res.Usage.CachedTokens, res.Usage.CacheWriteTokens)
 	}
+	if res.SelectedBackendID != "" {
+		fmt.Fprintf(stderr, " backend=%s", res.SelectedBackendID)
+	}
 	fmt.Fprintln(stderr)
 }
 
-func printUsage(w io.Writer) {
+func runErrorMessage(err error) string {
-	fmt.Fprintln(w, "usage: scriptorium <run|render|serve> ...")
+	if errors.Is(err, promptkit.ErrCapacityExceeded) {
-	fmt.Fprintln(w, "  run:   scriptorium run [--config PATH] [--prompt-dir DIR] [--profile-dir DIR] --prompt ID --input name=path [--input ...] [--profile ID] [--llm-base-url URL] [--model NAME] [--api-key-env ENV] [--temperature N] [--max-tokens N] [--top-p N] [--var k=v] [--out path] [--timeout 10m]")
+		return "run error: model backend capacity is exhausted"
-	fmt.Fprintln(w, "  render: scriptorium render [--config PATH] [--prompt-dir DIR] [--profile-dir DIR] --prompt ID --input name=path [--input ...] [--profile ID] [--llm-base-url URL] [--model NAME] [--api-key-env ENV] [--temperature N] [--max-tokens N] [--top-p N] [--var k=v] [--format text|json] [--out path] [--timeout 10m]")
+	}
-	fmt.Fprintf(w, "  serve: scriptorium serve [--config PATH] [--addr %s] [--prompt-dir DIR] [--profile-dir DIR] [--schema-dir DIR] [--artifact-root DIR] [--max-request-bytes N] [--max-artifact-bytes N] [--max-response-bytes N]\n", defaults.HTTPAddrDefault)
+	return fmt.Sprintf("run error: %v", err)
+}
+
+func printUsage(w io.Writer) {
+	fmt.Fprintln(w, "usage: scriptorium <run|render|serve|inspect|config> ...")
+	fmt.Fprintln(w, "  run:   scriptorium run [--config PATH] [--config-overlay NAME] [--prompt-dir DIR] [--profile-dir DIR] [--schema-dir DIR] --prompt ID [--prompt-version VERSION] [--input name=path] [--profile ID] [--session-id ID] [--llm-base-url URL] [--model NAME] [--api-key-env ENV] [--temperature N] [--max-tokens N] [--top-p N] [--reasoning-effort VALUE] [--var k=v] [--out path] [--execution-report path] [--timeout 10m] [--run-timeout 10m] [--transient-retries N]")
+	fmt.Fprintln(w, "  render: scriptorium render [--config PATH] [--config-overlay NAME] [--prompt-dir DIR] [--profile-dir DIR] [--schema-dir DIR] --prompt ID [--prompt-version VERSION] [--input name=path] [--profile ID] [--session-id ID] [--llm-base-url URL] [--model NAME] [--api-key-env ENV] [--temperature N] [--max-tokens N] [--top-p N] [--reasoning-effort VALUE] [--var k=v] [--format text|json] [--out path] [--timeout 10m] [--transient-retries N]")
+	fmt.Fprintf(w, "  serve: scriptorium serve [--config PATH] [--config-overlay NAME] [--addr %s] [--prompt-dir DIR] [--profile-dir DIR] [--schema-dir DIR] [--artifact-root DIR] [--max-request-bytes N] [--max-artifact-bytes N] [--max-response-bytes N]\n", defaults.HTTPAddrDefault)
+	fmt.Fprintln(w, "  inspect prompt: scriptorium inspect prompt --prompt ID [--prompt-version VERSION] [--config PATH] [--config-overlay NAME] [--prompt-dir DIR] [--format text|json] [--out path]")
+	fmt.Fprintln(w, "  inspect profile: scriptorium inspect profile --profile ID [--config PATH] [--config-overlay NAME] [--profile-dir DIR] [--format text|json] [--out path]")
+	fmt.Fprintln(w, "  config: scriptorium config <validate|show|sources|explain> [--config PATH] [--config-overlay NAME] [application overrides] [--path /pointer for explain]")
 }

internal/adapter/dependency_test.go

@@ -13,87 +13,175 @@ import (
 	"testing"
 )
 
-const scriptoriumModulePath = "gitea.maximumdirect.net/eric/scriptorium"
+const (
+	scriptoriumModulePath             = "gitea.maximumdirect.net/eric/scriptorium"
+	promptkitInternalPath             = "gitea.maximumdirect.net/eric/promptkit/internal"
+	promptkitOpenRouterCatalogPath    = "gitea.maximumdirect.net/eric/promptkit-backend-openrouter"
+	promptkitRakestrawhomeCatalogPath = "gitea.maximumdirect.net/eric/promptkit-backend-rakestrawhome"
+)
 
-var forbiddenFrameworkPackageRoots = []string{
+var (
-	scriptoriumModulePath + "/internal/domain",
+	removedFrameworkPackageRoots = []string{
-	scriptoriumModulePath + "/internal/usecase",
-	scriptoriumModulePath + "/internal/promptdef",
-	scriptoriumModulePath + "/internal/prompt",
-	scriptoriumModulePath + "/internal/profile",
-	scriptoriumModulePath + "/internal/validate",
-	scriptoriumModulePath + "/internal/llm",
 		scriptoriumModulePath + "/internal/artifact",
-}
+		scriptoriumModulePath + "/internal/domain",
+		scriptoriumModulePath + "/internal/filecatalog",
+		scriptoriumModulePath + "/internal/llm",
+		scriptoriumModulePath + "/internal/profile",
+		scriptoriumModulePath + "/internal/prompt",
+		scriptoriumModulePath + "/internal/promptdef",
+		scriptoriumModulePath + "/internal/usecase",
+		scriptoriumModulePath + "/internal/validate",
+	}
+	removedFrameworkDirectories = []string{
+		"internal/artifact",
+		"internal/domain",
+		"internal/filecatalog",
+		"internal/llm",
+		"internal/profile",
+		"internal/prompt",
+		"internal/promptdef",
+		"internal/usecase",
+		"internal/validate",
+	}
+	nonSourceDirectories = map[string]struct{}{
+		".cache":           {},
+		".codebase-memory": {},
+		".git":             {},
+		"build":            {},
+		"coverage":         {},
+		"dist":             {},
+		"node_modules":     {},
+		"out":              {},
+		"testdata":         {},
+		"vendor":           {},
+	}
+)
 
-type forbiddenFrameworkImport struct {
+type forbiddenImport struct {
 	filePath   string
 	importPath string
 }
 
-func TestScriptoriumAdaptersUseOnlyPublicFrameworkBoundary(t *testing.T) {
+func TestApplicationBoundary(t *testing.T) {
-	_, testFile, _, ok := runtime.Caller(0)
+	moduleRoot := moduleRootFromTestFile(t)
-	if !ok {
-		t.Fatal("locate dependency guard source")
-	}
 
-	adapterDir := filepath.Dir(testFile)
+	violations, err := findForbiddenProductionImports(moduleRoot)
-	violations, err := findForbiddenFrameworkImports([]string{
-		filepath.Join(adapterDir, "cli"),
-		filepath.Join(adapterDir, "http"),
-		filepath.Join(adapterDir, "..", "format"),
-	})
 	if err != nil {
-		t.Fatalf("scan framework imports: %v", err)
+		t.Fatalf("scan production imports: %v", err)
 	}
 	for _, violation := range violations {
-		t.Errorf("%s imports forbidden framework package %s", violation.filePath, violation.importPath)
+		t.Errorf("%s imports forbidden package %s", violation.filePath, violation.importPath)
+	}
+
+	assertFrameworkImplementationAbsent(t, moduleRoot)
+}
+
+func TestForbiddenImportScannerDetectsFormerRoot(t *testing.T) {
+	root := t.TempDir()
+	sourcePath := writeGoSource(t, root, "nested/consumer/root.go", scriptoriumModulePath)
+
+	violations, err := findForbiddenProductionImports(root)
+	if err != nil {
+		t.Fatalf("scan source fixture: %v", err)
+	}
+	assertSingleViolation(t, violations, sourcePath, scriptoriumModulePath)
+}
+
+func TestForbiddenImportScannerDetectsFormerFrameworkFamily(t *testing.T) {
+	root := t.TempDir()
+	importPath := scriptoriumModulePath + "/internal/profile/builtin"
+	sourcePath := writeGoSource(t, root, "nested/consumer/profile.go", importPath)
+
+	violations, err := findForbiddenProductionImports(root)
+	if err != nil {
+		t.Fatalf("scan source fixture: %v", err)
+	}
+	assertSingleViolation(t, violations, sourcePath, importPath)
+}
+
+func TestForbiddenImportScannerDetectsPromptkitInternalPackages(t *testing.T) {
+	tests := []struct {
+		name       string
+		importPath string
+	}{
+		{name: "exact internal root", importPath: promptkitInternalPath},
+		{name: "internal descendant", importPath: promptkitInternalPath + "/domain"},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			root := t.TempDir()
+			sourcePath := writeGoSource(t, root, "nested/consumer/promptkit.go", tc.importPath)
+
+			violations, err := findForbiddenProductionImports(root)
+			if err != nil {
+				t.Fatalf("scan source fixture: %v", err)
+			}
+			assertSingleViolation(t, violations, sourcePath, tc.importPath)
+		})
 	}
 }
 
-func TestForbiddenFrameworkImportScannerDetectsNestedPackageFamilies(t *testing.T) {
+func TestForbiddenImportScannerDetectsPromptkitCatalogPackages(t *testing.T) {
+	for _, importPath := range []string{
+		promptkitOpenRouterCatalogPath,
+		promptkitRakestrawhomeCatalogPath,
+	} {
+		t.Run(importPath, func(t *testing.T) {
 			root := t.TempDir()
-	nestedDir := filepath.Join(root, "nested", "adapter")
+			sourcePath := writeGoSource(t, root, "nested/consumer/catalog.go", importPath)
-	if err := os.MkdirAll(nestedDir, 0o755); err != nil {
-		t.Fatalf("create nested source directory: %v", err)
-	}
 
-	sourcePath := filepath.Join(nestedDir, "imports.go")
+			violations, err := findForbiddenProductionImports(root)
-	source := `package nested
+			if err != nil {
+				t.Fatalf("scan source fixture: %v", err)
+			}
+			assertSingleViolation(t, violations, sourcePath, importPath)
+		})
+	}
+}
+
+func TestForbiddenImportScannerAllowsRetainedApplicationPackages(t *testing.T) {
+	root := t.TempDir()
+	sourcePath := filepath.Join(root, "nested/consumer/application.go")
+	if err := os.MkdirAll(filepath.Dir(sourcePath), 0o755); err != nil {
+		t.Fatalf("create source fixture directory: %v", err)
+	}
+	source := `package consumer
 
 import (
-	_ "gitea.maximumdirect.net/eric/scriptorium"
+	_ "gitea.maximumdirect.net/eric/promptkit"
-	_ "gitea.maximumdirect.net/eric/scriptorium/internal/profile/builtin"
+	_ "gitea.maximumdirect.net/eric/scriptorium/internal/adapter/http"
+	_ "gitea.maximumdirect.net/eric/scriptorium/internal/config"
+	_ "gitea.maximumdirect.net/eric/scriptorium/internal/defaults"
+	_ "gitea.maximumdirect.net/eric/scriptorium/internal/format"
 )
 `
 	if err := os.WriteFile(sourcePath, []byte(source), 0o644); err != nil {
-		t.Fatalf("write nested source fixture: %v", err)
+		t.Fatalf("write source fixture: %v", err)
 	}
 
-	violations, err := findForbiddenFrameworkImports([]string{root})
+	violations, err := findForbiddenProductionImports(root)
 	if err != nil {
-		t.Fatalf("scan nested source fixture: %v", err)
+		t.Fatalf("scan source fixture: %v", err)
 	}
-	if len(violations) != 1 {
+	if len(violations) != 0 {
-		t.Fatalf("expected one forbidden import, got %#v", violations)
+		t.Fatalf("expected retained application imports to be allowed, got %#v", violations)
-	}
-	if violations[0].filePath != sourcePath {
-		t.Fatalf("unexpected importing file: %q", violations[0].filePath)
-	}
-	wantImport := scriptoriumModulePath + "/internal/profile/builtin"
-	if violations[0].importPath != wantImport {
-		t.Fatalf("unexpected forbidden import: %q", violations[0].importPath)
 	}
 }
 
-func findForbiddenFrameworkImports(roots []string) ([]forbiddenFrameworkImport, error) {
+func findForbiddenProductionImports(root string) ([]forbiddenImport, error) {
-	var violations []forbiddenFrameworkImport
+	var violations []forbiddenImport
-	for _, root := range roots {
 	err := filepath.WalkDir(root, func(path string, entry fs.DirEntry, err error) error {
 		if err != nil {
 			return err
 		}
-			if entry.IsDir() || !strings.HasSuffix(entry.Name(), ".go") || strings.HasSuffix(entry.Name(), "_test.go") {
+		if entry.IsDir() {
+			if path != root && shouldSkipSourceDirectory(entry.Name()) {
+				return filepath.SkipDir
+			}
+			return nil
+		}
+		if !strings.HasSuffix(entry.Name(), ".go") || strings.HasSuffix(entry.Name(), "_test.go") {
 			return nil
 		}
 
@@ -106,8 +194,8 @@ func findForbiddenFrameworkImports(roots []string) ([]forbiddenFrameworkImport,
 			if err != nil {
 				return fmt.Errorf("parse import path in %s: %w", path, err)
 			}
-				if isForbiddenFrameworkImport(importPath) {
+			if isForbiddenProductionImport(importPath) {
-					violations = append(violations, forbiddenFrameworkImport{
+				violations = append(violations, forbiddenImport{
 					filePath:   path,
 					importPath: importPath,
 				})
@@ -116,17 +204,119 @@ func findForbiddenFrameworkImports(roots []string) ([]forbiddenFrameworkImport,
 		return nil
 	})
 	if err != nil {
-			return nil, fmt.Errorf("walk source root %s: %w", root, err)
+		return nil, fmt.Errorf("walk repository root %s: %w", root, err)
-		}
 	}
 	return violations, nil
 }
 
-func isForbiddenFrameworkImport(importPath string) bool {
+func shouldSkipSourceDirectory(name string) bool {
-	for _, root := range forbiddenFrameworkPackageRoots {
+	_, skip := nonSourceDirectories[name]
+	return skip
+}
+
+func isForbiddenProductionImport(importPath string) bool {
+	if importPath == scriptoriumModulePath {
+		return true
+	}
+	if importPath == promptkitInternalPath || strings.HasPrefix(importPath, promptkitInternalPath+"/") {
+		return true
+	}
+	if importPath == promptkitOpenRouterCatalogPath || strings.HasPrefix(importPath, promptkitOpenRouterCatalogPath+"/") {
+		return true
+	}
+	if importPath == promptkitRakestrawhomeCatalogPath || strings.HasPrefix(importPath, promptkitRakestrawhomeCatalogPath+"/") {
+		return true
+	}
+	for _, root := range removedFrameworkPackageRoots {
 		if importPath == root || strings.HasPrefix(importPath, root+"/") {
 			return true
 		}
 	}
 	return false
 }
+
+func moduleRootFromTestFile(t *testing.T) string {
+	t.Helper()
+
+	_, testFile, _, ok := runtime.Caller(0)
+	if !ok {
+		t.Fatal("locate dependency guard source")
+	}
+	root, err := findModuleRoot(filepath.Dir(testFile))
+	if err != nil {
+		t.Fatal(err)
+	}
+	return root
+}
+
+func findModuleRoot(start string) (string, error) {
+	dir, err := filepath.Abs(start)
+	if err != nil {
+		return "", fmt.Errorf("resolve module search path: %w", err)
+	}
+	for {
+		goMod := filepath.Join(dir, "go.mod")
+		if info, err := os.Stat(goMod); err == nil && !info.IsDir() {
+			return dir, nil
+		} else if err != nil && !os.IsNotExist(err) {
+			return "", fmt.Errorf("inspect %s: %w", goMod, err)
+		}
+
+		parent := filepath.Dir(dir)
+		if parent == dir {
+			return "", fmt.Errorf("locate go.mod from %s", start)
+		}
+		dir = parent
+	}
+}
+
+func assertFrameworkImplementationAbsent(t *testing.T, moduleRoot string) {
+	t.Helper()
+
+	entries, err := os.ReadDir(moduleRoot)
+	if err != nil {
+		t.Fatalf("read module root: %v", err)
+	}
+	for _, entry := range entries {
+		if !entry.IsDir() && strings.HasSuffix(entry.Name(), ".go") && !strings.HasSuffix(entry.Name(), "_test.go") {
+			t.Errorf("module root contains production Go file %s", entry.Name())
+		}
+	}
+
+	for _, relativePath := range removedFrameworkDirectories {
+		path := filepath.Join(moduleRoot, filepath.FromSlash(relativePath))
+		if _, err := os.Stat(path); err == nil {
+			t.Errorf("removed framework directory still exists: %s", relativePath)
+		} else if !os.IsNotExist(err) {
+			t.Errorf("inspect removed framework directory %s: %v", relativePath, err)
+		}
+	}
+}
+
+func writeGoSource(t *testing.T, root, relativePath, importPath string) string {
+	t.Helper()
+
+	sourcePath := filepath.Join(root, filepath.FromSlash(relativePath))
+	if err := os.MkdirAll(filepath.Dir(sourcePath), 0o755); err != nil {
+		t.Fatalf("create source fixture directory: %v", err)
+	}
+	source := fmt.Sprintf("package consumer\n\nimport _ %q\n", importPath)
+	if err := os.WriteFile(sourcePath, []byte(source), 0o644); err != nil {
+		t.Fatalf("write source fixture: %v", err)
+	}
+	return sourcePath
+}
+
+func assertSingleViolation(t *testing.T, violations []forbiddenImport, sourcePath, importPath string) {
+	t.Helper()
+
+	if len(violations) != 1 {
+		t.Fatalf("expected one forbidden import, got %#v", violations)
+	}
+	if violations[0].filePath != sourcePath {
+		t.Fatalf("unexpected importing file: %q", violations[0].filePath)
+	}
+	if violations[0].importPath != importPath {
+		t.Fatalf("unexpected forbidden import: %q", violations[0].importPath)
+	}
+}

internal/adapter/http/artifact_reader.go

@@ -11,7 +11,7 @@ import (
 	"path/filepath"
 	"strings"
 
-	"gitea.maximumdirect.net/eric/scriptorium"
+	"gitea.maximumdirect.net/eric/promptkit"
 )
 
 var (
@@ -25,7 +25,7 @@ const fallbackArtifactContentType = "text/plain"
 // NewRestrictedArtifactReader creates the HTTP artifact reader for a rooted
 // filesystem and optional byte limit. An empty root permits inline artifacts
 // but denies file references; a zero limit permits artifacts of any size.
-func NewRestrictedArtifactReader(root string, maxBytes int64) (scriptorium.ArtifactReader, error) {
+func NewRestrictedArtifactReader(root string, maxBytes int64) (promptkit.ArtifactReader, error) {
 	if maxBytes < 0 {
 		return nil, fmt.Errorf("artifact size limit must be greater than or equal to 0")
 	}
@@ -46,9 +46,9 @@ type restrictedArtifactReader struct {
 	maxBytes int64
 }
 
-var _ scriptorium.ArtifactReader = (*restrictedArtifactReader)(nil)
+var _ promptkit.ArtifactReader = (*restrictedArtifactReader)(nil)
 
-func (r *restrictedArtifactReader) Read(ctx context.Context, ref scriptorium.ArtifactRef) (*scriptorium.Artifact, error) {
+func (r *restrictedArtifactReader) Read(ctx context.Context, ref promptkit.ArtifactRef) (*promptkit.Artifact, error) {
 	select {
 	case <-ctx.Done():
 		return nil, ctx.Err()
@@ -56,22 +56,22 @@ func (r *restrictedArtifactReader) Read(ctx context.Context, ref scriptorium.Art
 	}
 
 	switch ref.Type {
-	case scriptorium.ArtifactRefInline:
+	case promptkit.ArtifactRefInline:
 		return readInlineArtifact(ref)
-	case scriptorium.ArtifactRefFile:
+	case promptkit.ArtifactRefFile:
 		return r.readFileArtifact(ref)
 	default:
 		return nil, fmt.Errorf("unsupported artifact reference type %q", ref.Type)
 	}
 }
 
-func readInlineArtifact(ref scriptorium.ArtifactRef) (*scriptorium.Artifact, error) {
+func readInlineArtifact(ref promptkit.ArtifactRef) (*promptkit.Artifact, error) {
 	if ref.Body == "" {
 		return nil, errors.New("inline artifact body is required")
 	}
 
 	body := []byte(ref.Body)
-	return &scriptorium.Artifact{
+	return &promptkit.Artifact{
 		ContentType: fallbackArtifactContentType,
 		Body:        body,
 		Size:        int64(len(body)),
@@ -80,7 +80,7 @@ func readInlineArtifact(ref scriptorium.ArtifactRef) (*scriptorium.Artifact, err
 	}, nil
 }
 
-func (r *restrictedArtifactReader) readFileArtifact(ref scriptorium.ArtifactRef) (*scriptorium.Artifact, error) {
+func (r *restrictedArtifactReader) readFileArtifact(ref promptkit.ArtifactRef) (*promptkit.Artifact, error) {
 	if ref.URI == "" {
 		return nil, errors.New("file artifact path is required")
 	}
@@ -119,7 +119,7 @@ func (r *restrictedArtifactReader) resolveLexicalPath(rawPath string) (string, e
 	return absCandidate, nil
 }
 
-func readArtifactFile(path string, maxBytes int64) (*scriptorium.Artifact, error) {
+func readArtifactFile(path string, maxBytes int64) (*promptkit.Artifact, error) {
 	file, err := os.Open(path)
 	if err != nil {
 		return nil, fmt.Errorf("failed to read file %s: %w", path, err)
@@ -150,7 +150,7 @@ func readArtifactFile(path string, maxBytes int64) (*scriptorium.Artifact, error
 	if contentType == "" {
 		contentType = fallbackArtifactContentType
 	}
-	return &scriptorium.Artifact{
+	return &promptkit.Artifact{
 		Name:        filepath.Base(path),
 		ContentType: contentType,
 		Body:        body,

internal/adapter/http/artifact_reader_test.go

@@ -8,7 +8,7 @@ import (
 	"path/filepath"
 	"testing"
 
-	"gitea.maximumdirect.net/eric/scriptorium"
+	"gitea.maximumdirect.net/eric/promptkit"
 )
 
 func TestRestrictedArtifactReaderReadsContainedFiles(t *testing.T) {
@@ -37,9 +37,9 @@ func TestRestrictedArtifactReaderReadsContainedFiles(t *testing.T) {
 		t.Fatalf("construct restricted reader: %v", err)
 	}
 
-	for _, ref := range []scriptorium.ArtifactRef{
+	for _, ref := range []promptkit.ArtifactRef{
-		{Type: scriptorium.ArtifactRefFile, URI: "nested/../input.html"},
+		{Type: promptkit.ArtifactRefFile, URI: "nested/../input.html"},
-		{Type: scriptorium.ArtifactRefFile, URI: inputPath},
+		{Type: promptkit.ArtifactRefFile, URI: inputPath},
 	} {
 		artifact, err := reader.Read(context.Background(), ref)
 		if err != nil {
@@ -56,7 +56,7 @@ func TestRestrictedArtifactReaderReadsContainedFiles(t *testing.T) {
 		}
 	}
 
-	artifact, err := reader.Read(context.Background(), scriptorium.File("input.unknown"))
+	artifact, err := reader.Read(context.Background(), promptkit.File("input.unknown"))
 	if err != nil {
 		t.Fatalf("read unknown-extension path: %v", err)
 	}
@@ -64,9 +64,9 @@ func TestRestrictedArtifactReaderReadsContainedFiles(t *testing.T) {
 		t.Fatalf("unexpected fallback content type: %q", artifact.ContentType)
 	}
 
-	for _, ref := range []scriptorium.ArtifactRef{
+	for _, ref := range []promptkit.ArtifactRef{
-		{Type: scriptorium.ArtifactRefFile, URI: filepath.Join("..", filepath.Base(outside), "secret.txt")},
+		{Type: promptkit.ArtifactRefFile, URI: filepath.Join("..", filepath.Base(outside), "secret.txt")},
-		{Type: scriptorium.ArtifactRefFile, URI: filepath.Join(outside, "secret.txt")},
+		{Type: promptkit.ArtifactRefFile, URI: filepath.Join(outside, "secret.txt")},
 	} {
 		_, err := reader.Read(context.Background(), ref)
 		if !errors.Is(err, ErrFileOutsideRoot) {
@@ -90,7 +90,7 @@ func TestRestrictedArtifactReaderFollowsSymlinkAfterLexicalCheck(t *testing.T) {
 	if err != nil {
 		t.Fatalf("construct restricted reader: %v", err)
 	}
-	artifact, err := reader.Read(context.Background(), scriptorium.File("linked.txt"))
+	artifact, err := reader.Read(context.Background(), promptkit.File("linked.txt"))
 	if err != nil {
 		t.Fatalf("read symlink inside root: %v", err)
 	}
@@ -105,7 +105,7 @@ func TestRestrictedArtifactReaderWithoutRootDeniesFiles(t *testing.T) {
 		t.Fatalf("construct rootless reader: %v", err)
 	}
 
-	artifact, err := reader.Read(context.Background(), scriptorium.Inline("inline"))
+	artifact, err := reader.Read(context.Background(), promptkit.Inline("inline"))
 	if err != nil {
 		t.Fatalf("read inline artifact: %v", err)
 	}
@@ -113,7 +113,7 @@ func TestRestrictedArtifactReaderWithoutRootDeniesFiles(t *testing.T) {
 		t.Fatalf("unexpected inline artifact: %#v", artifact)
 	}
 
-	_, err = reader.Read(context.Background(), scriptorium.File("input.txt"))
+	_, err = reader.Read(context.Background(), promptkit.File("input.txt"))
 	if !errors.Is(err, ErrFileNotAllowed) {
 		t.Fatalf("expected ErrFileNotAllowed, got %v", err)
 	}
@@ -132,11 +132,11 @@ func TestRestrictedArtifactReaderEnforcesLimits(t *testing.T) {
 	if err != nil {
 		t.Fatalf("construct limited reader: %v", err)
 	}
-	artifact, err := reader.Read(context.Background(), scriptorium.File("exact.txt"))
+	artifact, err := reader.Read(context.Background(), promptkit.File("exact.txt"))
 	if err != nil || string(artifact.Body) != "12345" {
 		t.Fatalf("expected exact-limit artifact, got %#v and %v", artifact, err)
 	}
-	_, err = reader.Read(context.Background(), scriptorium.File("large.txt"))
+	_, err = reader.Read(context.Background(), promptkit.File("large.txt"))
 	if !errors.Is(err, ErrFileTooLarge) {
 		t.Fatalf("expected ErrFileTooLarge, got %v", err)
 	}
@@ -145,7 +145,7 @@ func TestRestrictedArtifactReaderEnforcesLimits(t *testing.T) {
 	if err != nil {
 		t.Fatalf("construct unlimited reader: %v", err)
 	}
-	artifact, err = unlimited.Read(context.Background(), scriptorium.File("large.txt"))
+	artifact, err = unlimited.Read(context.Background(), promptkit.File("large.txt"))
 	if err != nil || string(artifact.Body) != "123456" {
 		t.Fatalf("expected unlimited artifact, got %#v and %v", artifact, err)
 	}
@@ -163,9 +163,9 @@ func TestRestrictedArtifactReaderRejectsCanceledAndMalformedReferences(t *testin
 
 	canceledCtx, cancel := context.WithCancel(context.Background())
 	cancel()
-	for _, ref := range []scriptorium.ArtifactRef{
+	for _, ref := range []promptkit.ArtifactRef{
-		scriptorium.Inline("input"),
+		promptkit.Inline("input"),
-		scriptorium.File("input.txt"),
+		promptkit.File("input.txt"),
 	} {
 		_, err := reader.Read(canceledCtx, ref)
 		if !errors.Is(err, context.Canceled) {
@@ -173,10 +173,10 @@ func TestRestrictedArtifactReaderRejectsCanceledAndMalformedReferences(t *testin
 		}
 	}
 
-	for _, ref := range []scriptorium.ArtifactRef{
+	for _, ref := range []promptkit.ArtifactRef{
-		{Type: scriptorium.ArtifactRefType("unsupported")},
+		{Type: promptkit.ArtifactRefType("unsupported")},
-		{Type: scriptorium.ArtifactRefInline},
+		{Type: promptkit.ArtifactRefInline},
-		{Type: scriptorium.ArtifactRefFile},
+		{Type: promptkit.ArtifactRefFile},
 	} {
 		if _, err := reader.Read(context.Background(), ref); err == nil {
 			t.Fatalf("expected malformed reference %#v to fail", ref)

internal/adapter/http/dto.go

@@ -2,16 +2,22 @@ package httpadapter
 
 import (
 	"time"
+
+	executionreport "gitea.maximumdirect.net/eric/scriptorium/internal/report"
 )
 
 type runRequestDTO struct {
 	PromptID               string                   `json:"prompt_id"`
 	PromptVersion          string                   `json:"prompt_version,omitempty"`
 	ProfileID              string                   `json:"profile_id,omitempty"`
+	SessionID              string                   `json:"session_id,omitempty"`
 	Inputs                 map[string]inputRefDTO   `json:"inputs"`
 	Vars                   map[string]string        `json:"vars,omitempty"`
 	Model                  *modelOverrideRequestDTO `json:"model,omitempty"`
 	IncludeRawOutput       bool                     `json:"include_raw_output,omitempty"`
+	TransientRetries       *int                     `json:"transient_retries,omitempty"`
+	RunTimeoutSeconds      *int64                   `json:"run_timeout_seconds,omitempty"`
+	IncludeExecutionReport bool                     `json:"include_execution_report,omitempty"`
 }
 
 type inputRefDTO struct {
@@ -28,7 +34,7 @@ type modelOverrideRequestDTO struct {
 	TopP            *float64       `json:"top_p,omitempty"`
 	TimeoutSeconds  *int           `json:"timeout_seconds,omitempty"`
 	ServiceTier     string         `json:"service_tier,omitempty"`
-	ReasoningEffort string         `json:"reasoning_effort,omitempty"`
+	ReasoningEffort *string        `json:"reasoning_effort,omitempty"`
 	APIKeyEnv       string         `json:"api_key_env,omitempty"`
 	ExtraParams     map[string]any `json:"extra_params,omitempty"`
 }
@@ -38,6 +44,7 @@ type runResponseDTO struct {
 	Validation     validationDTO              `json:"validation"`
 	Metadata       metadataDTO                `json:"metadata"`
 	RawModelOutput *string                    `json:"raw_model_output,omitempty"`
+	Execution      *executionreport.Execution `json:"execution,omitempty"`
 }
 
 type artifactDTO struct {
@@ -56,6 +63,8 @@ type metadataDTO struct {
 	PromptHash         string            `json:"prompt_hash"`
 	RenderedPromptHash string            `json:"rendered_prompt_hash"`
 	SelectedProfileID  string            `json:"selected_profile_id"`
+	SelectedBackendID  string            `json:"selected_backend_id,omitempty"`
+	SessionID          string            `json:"session_id,omitempty"`
 	ModelName          string            `json:"model_name"`
 	Endpoint           string            `json:"endpoint"`
 	ModelParams        modelParamsDTO    `json:"model_params"`
@@ -71,6 +80,7 @@ type metadataDTO struct {
 
 type modelParamsDTO struct {
 	Endpoint        string         `json:"endpoint"`
+	BackendID       string         `json:"backend_id,omitempty"`
 	Model           string         `json:"model"`
 	Temperature     float64        `json:"temperature"`
 	MaxTokens       int            `json:"max_tokens"`
@@ -101,6 +111,7 @@ type validationDTO struct {
 
 type errorResponse struct {
 	Error     errorBody                  `json:"error"`
+	Execution *executionreport.Execution `json:"execution,omitempty"`
 }
 
 type errorBody struct {

internal/adapter/http/handler.go

@@ -5,15 +5,18 @@ import (
 	"encoding/json"
 	"errors"
 	"io"
+	"math"
 	"net/http"
 	"strings"
+	"time"
 
-	"gitea.maximumdirect.net/eric/scriptorium"
+	"gitea.maximumdirect.net/eric/promptkit"
 	"gitea.maximumdirect.net/eric/scriptorium/internal/defaults"
+	executionreport "gitea.maximumdirect.net/eric/scriptorium/internal/report"
 )
 
 type Runner interface {
-	Run(ctx context.Context, req scriptorium.RunRequest) (*scriptorium.RunResult, error)
+	Run(ctx context.Context, req promptkit.RunRequest) (*promptkit.RunResult, error)
 }
 
 type Handler struct {
@@ -76,36 +79,70 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		writeError(w, http.StatusBadRequest, "invalid_request", "prompt_id is required")
 		return
 	}
-	if len(req.Inputs) == 0 {
+	if req.TransientRetries != nil && *req.TransientRetries < 0 {
-		writeError(w, http.StatusBadRequest, "invalid_request", "inputs is required")
+		writeError(w, http.StatusBadRequest, "invalid_request", "transient_retries must be greater than or equal to 0")
 		return
 	}
-
+	if req.RunTimeoutSeconds != nil {
-	mappedInputs := make(map[string]scriptorium.ArtifactRef, len(req.Inputs))
+		if *req.RunTimeoutSeconds < 0 || *req.RunTimeoutSeconds > math.MaxInt64/int64(time.Second) {
+			writeError(w, http.StatusBadRequest, "invalid_request", "run_timeout_seconds is out of range")
+			return
+		}
+	}
+	var mappedInputs map[string]promptkit.ArtifactRef
+	if len(req.Inputs) > 0 {
+		mappedInputs = make(map[string]promptkit.ArtifactRef, len(req.Inputs))
 		for name, in := range req.Inputs {
-		mappedInputs[name] = scriptorium.ArtifactRef{
+			mappedInputs[name] = promptkit.ArtifactRef{
-			Type: scriptorium.ArtifactRefType(in.Type),
+				Type: promptkit.ArtifactRefType(in.Type),
 				URI:  in.URI,
 				Body: in.Body,
 			}
 		}
+	}
 
-	var model *scriptorium.ExecutionTargetOverride
+	var model *promptkit.ExecutionTargetOverride
 	if req.Model != nil {
 		model = executionTargetOverrideFromModelOverrideDTO(req.Model)
 	}
 
-	res, err := h.runner.Run(r.Context(), scriptorium.RunRequest{
+	runContext := r.Context()
+	if req.RunTimeoutSeconds != nil && *req.RunTimeoutSeconds > 0 {
+		var cancel context.CancelFunc
+		runContext, cancel = context.WithTimeout(runContext, time.Duration(*req.RunTimeoutSeconds)*time.Second)
+		defer cancel()
+	}
+	mappedRequest := promptkit.RunRequest{
 		PromptID:         req.PromptID,
 		PromptVersion:    req.PromptVersion,
 		ProfileID:        req.ProfileID,
+		SessionID:        req.SessionID,
 		Inputs:           mappedInputs,
 		Vars:             req.Vars,
 		Execution:        model,
-	})
+		TransientRetries: req.TransientRetries,
+	}
+	var collector *executionreport.Collector
+	if req.IncludeExecutionReport {
+		collector = executionreport.NewCollector()
+		mappedRequest.Observer = collector.Observe
+	}
+	res, err := h.runner.Run(runContext, mappedRequest)
+	var execution *executionreport.Execution
+	if collector != nil {
+		execution = collector.Snapshot()
+	}
 	if err != nil {
+		switch runContext.Err() {
+		case context.DeadlineExceeded:
+			writeRunFailure(w, http.StatusGatewayTimeout, "deadline_exceeded", "run execution deadline exceeded", execution, h.options.MaxResponseBytes)
+			return
+		case context.Canceled:
+			writeRunFailure(w, http.StatusRequestTimeout, "request_canceled", "run request canceled", execution, h.options.MaxResponseBytes)
+			return
+		}
 		status, code, message := mapRunError(err)
-		writeError(w, status, code, message)
+		writeRunFailure(w, status, code, message, execution, h.options.MaxResponseBytes)
 		return
 	}
 
@@ -126,6 +163,8 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			PromptHash:         res.PromptHash,
 			RenderedPromptHash: res.RenderedPromptHash,
 			SelectedProfileID:  res.SelectedProfileID,
+			SelectedBackendID:  res.SelectedBackendID,
+			SessionID:          res.SessionID,
 			ModelName:          res.ModelName,
 			Endpoint:           res.Endpoint,
 			ModelParams:        modelParamsDTOFromExecutionTarget(res.EffectiveModelParams),
@@ -144,6 +183,7 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			ValidationStatus:   string(res.Validation.Status),
 			RepairAttemptsUsed: res.Validation.RepairAttempts,
 		},
+		Execution: execution,
 	}
 	if req.IncludeRawOutput {
 		raw := res.RawOutput
@@ -152,11 +192,19 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	writeLimitedJSON(w, http.StatusOK, resp, h.options.MaxResponseBytes)
 }
 
-func executionTargetOverrideFromModelOverrideDTO(dto *modelOverrideRequestDTO) *scriptorium.ExecutionTargetOverride {
+func writeRunFailure(w http.ResponseWriter, status int, code, message string, execution *executionreport.Execution, maxBytes int64) {
+	if execution == nil {
+		writeError(w, status, code, message)
+		return
+	}
+	writeLimitedJSON(w, status, errorResponse{Error: errorBody{Code: code, Message: message}, Execution: execution}, maxBytes)
+}
+
+func executionTargetOverrideFromModelOverrideDTO(dto *modelOverrideRequestDTO) *promptkit.ExecutionTargetOverride {
 	if dto == nil {
 		return nil
 	}
-	return &scriptorium.ExecutionTargetOverride{
+	return &promptkit.ExecutionTargetOverride{
 		Endpoint:        dto.Endpoint,
 		Model:           dto.Model,
 		Temperature:     dto.Temperature,
@@ -170,9 +218,10 @@ func executionTargetOverrideFromModelOverrideDTO(dto *modelOverrideRequestDTO) *
 	}
 }
 
-func modelParamsDTOFromExecutionTarget(target scriptorium.ExecutionTarget) modelParamsDTO {
+func modelParamsDTOFromExecutionTarget(target promptkit.ExecutionTarget) modelParamsDTO {
 	return modelParamsDTO{
 		Endpoint:        target.Endpoint,
+		BackendID:       target.BackendID,
 		Model:           target.Model,
 		Temperature:     target.Temperature,
 		MaxTokens:       target.MaxTokens,
@@ -185,7 +234,7 @@ func modelParamsDTOFromExecutionTarget(target scriptorium.ExecutionTarget) model
 	}
 }
 
-func mapValidation(v scriptorium.ValidationResult) validationDTO {
+func mapValidation(v promptkit.ValidationResult) validationDTO {
 	return validationDTO{
 		Status:         string(v.Status),
 		Mode:           string(v.Mode),
@@ -198,31 +247,33 @@ func mapValidation(v scriptorium.ValidationResult) validationDTO {
 
 func mapRunError(err error) (int, string, string) {
 	switch {
-	case errors.Is(err, scriptorium.ErrPromptNotFound):
+	case errors.Is(err, promptkit.ErrPromptNotFound):
 		return http.StatusNotFound, "prompt_not_found", "prompt definition not found"
-	case errors.Is(err, scriptorium.ErrProfileNotFound):
+	case errors.Is(err, promptkit.ErrProfileNotFound):
 		return http.StatusNotFound, "profile_not_found", "execution profile not found"
-	case errors.Is(err, scriptorium.ErrProfileRequired):
+	case errors.Is(err, promptkit.ErrProfileRequired):
 		return http.StatusBadRequest, "profile_required", "profile_id is required when prompt default_profile is not set"
-	case errors.Is(err, scriptorium.ErrAPIKeyEnvMissing):
+	case errors.Is(err, promptkit.ErrAPIKeyEnvMissing):
 		return http.StatusBadRequest, "api_key_env_missing", "api_key_env is set but the environment variable is missing"
-	case errors.Is(err, scriptorium.ErrPromptLoad):
+	case errors.Is(err, promptkit.ErrPromptLoad):
 		return http.StatusBadRequest, "prompt_load_failed", "failed to load prompt definition"
-	case errors.Is(err, scriptorium.ErrProfileLoad):
+	case errors.Is(err, promptkit.ErrProfileLoad):
 		return http.StatusBadRequest, "profile_load_failed", "failed to load execution profile"
-	case errors.Is(err, scriptorium.ErrInvalidRequest):
+	case errors.Is(err, promptkit.ErrInvalidRequest):
 		return http.StatusBadRequest, "invalid_request", "invalid run request"
 	case errors.Is(err, ErrFileNotAllowed), errors.Is(err, ErrFileOutsideRoot):
 		return http.StatusBadRequest, "artifact_not_allowed", "file input artifact is not allowed"
 	case errors.Is(err, ErrFileTooLarge):
 		return http.StatusRequestEntityTooLarge, "artifact_too_large", "file input artifact is too large"
-	case errors.Is(err, scriptorium.ErrArtifactLoad):
+	case errors.Is(err, promptkit.ErrArtifactLoad):
 		return http.StatusBadRequest, "artifact_read_failed", "failed to read input artifact"
-	case errors.Is(err, scriptorium.ErrPromptRender):
+	case errors.Is(err, promptkit.ErrPromptRender):
 		return http.StatusBadRequest, "prompt_render_failed", "failed to render prompt"
-	case errors.Is(err, scriptorium.ErrLLMGenerate):
+	case errors.Is(err, promptkit.ErrCapacityExceeded):
+		return http.StatusServiceUnavailable, "capacity_exceeded", "model backend capacity is exhausted"
+	case errors.Is(err, promptkit.ErrLLMGenerate), errors.Is(err, promptkit.ErrTransport), errors.Is(err, promptkit.ErrMalformedResponse), errors.Is(err, promptkit.ErrRetriesExhausted):
 		return http.StatusBadGateway, "llm_failed", "model generation request failed"
-	case errors.Is(err, scriptorium.ErrValidation):
+	case errors.Is(err, promptkit.ErrValidation):
 		return http.StatusInternalServerError, "validation_runtime_failed", "validation runtime failed"
 	default:
 		return http.StatusInternalServerError, "internal_error", "internal server error"

internal/artifact/reader.go

@@ -1,122 +0,0 @@
-package artifact
-
-import (
-	"context"
-	"crypto/sha256"
-	"errors"
-	"fmt"
-	"io"
-	"mime"
-	"os"
-	"path/filepath"
-
-	"gitea.maximumdirect.net/eric/scriptorium/internal/defaults"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
-)
-
-var (
-	ErrUnsupportedRefType = errors.New("unsupported artifact reference type")
-	ErrMissingInlineBody  = errors.New("missing body for inline artifact")
-	ErrMissingFilePath    = errors.New("missing file path for file artifact")
-)
-
-// Reader resolves artifact references into actual artifacts.
-type Reader interface {
-	Read(ctx context.Context, ref domain.ArtifactRef) (*domain.Artifact, error)
-}
-
-// CompositeReader routes artifact resolution based on the reference type.
-type CompositeReader struct {
-	inlineReader *inlineReader
-	fileReader   Reader
-}
-
-func NewCompositeReader() Reader {
-	return &CompositeReader{
-		inlineReader: &inlineReader{},
-		fileReader:   &fileReader{},
-	}
-}
-
-func (c *CompositeReader) Read(ctx context.Context, ref domain.ArtifactRef) (*domain.Artifact, error) {
-	select {
-	case <-ctx.Done():
-		return nil, ctx.Err()
-	default:
-	}
-
-	switch ref.Type {
-	case domain.ArtifactRefInline:
-		return c.inlineReader.Read(ctx, ref)
-	case domain.ArtifactRefFile:
-		return c.fileReader.Read(ctx, ref)
-	default:
-		return nil, fmt.Errorf("%w: %s", ErrUnsupportedRefType, ref.Type)
-	}
-}
-
-type inlineReader struct{}
-
-func (r *inlineReader) Read(ctx context.Context, ref domain.ArtifactRef) (*domain.Artifact, error) {
-	select {
-	case <-ctx.Done():
-		return nil, ctx.Err()
-	default:
-	}
-
-	if ref.Body == "" {
-		return nil, ErrMissingInlineBody
-	}
-
-	body := []byte(ref.Body)
-	return &domain.Artifact{
-		ContentType: defaults.ContentTypeTextPlain,
-		Body:        body,
-		Size:        int64(len(body)),
-		Hash:        fmt.Sprintf("%x", sha256.Sum256(body)),
-		URI:         ref.URI,
-	}, nil
-}
-
-type fileReader struct{}
-
-func (r *fileReader) Read(ctx context.Context, ref domain.ArtifactRef) (*domain.Artifact, error) {
-	select {
-	case <-ctx.Done():
-		return nil, ctx.Err()
-	default:
-	}
-
-	if ref.URI == "" {
-		return nil, ErrMissingFilePath
-	}
-
-	return readFileArtifact(ref.URI)
-}
-
-func readFileArtifact(path string) (*domain.Artifact, error) {
-	file, err := os.Open(path)
-	if err != nil {
-		return nil, fmt.Errorf("failed to read file %s: %w", path, err)
-	}
-	defer file.Close()
-
-	data, err := io.ReadAll(file)
-	if err != nil {
-		return nil, fmt.Errorf("failed to read file %s: %w", path, err)
-	}
-
-	contentType := mime.TypeByExtension(filepath.Ext(path))
-	if contentType == "" {
-		contentType = defaults.ContentTypeTextPlain
-	}
-
-	return &domain.Artifact{
-		Name:        filepath.Base(path),
-		ContentType: contentType,
-		Body:        data,
-		URI:         path,
-		Size:        int64(len(data)),
-		Hash:        fmt.Sprintf("%x", sha256.Sum256(data)),
-	}, nil
-}

internal/artifact/reader_test.go

@@ -1,105 +0,0 @@
-package artifact
-
-import (
-	"context"
-	"errors"
-	"os"
-	"testing"
-
-	"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
-)
-
-func TestCompositeReader_Read(t *testing.T) {
-	reader := NewCompositeReader()
-	ctx := context.Background()
-
-	t.Run("inline artifact", func(t *testing.T) {
-		ref := domain.ArtifactRef{
-			Type: domain.ArtifactRefInline,
-			Body: "hello world",
-		}
-		art, err := reader.Read(ctx, ref)
-		if err != nil {
-			t.Fatalf("unexpected error: %v", err)
-		}
-		if string(art.Body) != "hello world" {
-			t.Errorf("expected 'hello world', got %s", string(art.Body))
-		}
-		if art.ContentType != "text/plain" {
-			t.Errorf("expected text/plain content type, got %q", art.ContentType)
-		}
-		if art.Hash != "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9" {
-			t.Errorf("unexpected hash: %s", art.Hash)
-		}
-	})
-
-	t.Run("inline artifact missing body", func(t *testing.T) {
-		ref := domain.ArtifactRef{
-			Type: domain.ArtifactRefInline,
-			Body: "",
-		}
-		_, err := reader.Read(ctx, ref)
-		if !errors.Is(err, ErrMissingInlineBody) {
-			t.Errorf("expected ErrMissingInlineBody, got %v", err)
-		}
-	})
-
-	t.Run("unsupported ref type", func(t *testing.T) {
-		ref := domain.ArtifactRef{
-			Type: domain.ArtifactRefType("unsupported"),
-			URI:  "unsupported://bucket/key",
-		}
-		_, err := reader.Read(ctx, ref)
-		if !errors.Is(err, ErrUnsupportedRefType) {
-			t.Error("expected error for unsupported type")
-		}
-	})
-}
-
-func TestFileReader_Read(t *testing.T) {
-	content := []byte("test file content")
-	tmpFile, err := os.CreateTemp("", "artifact_test_*.txt")
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer os.Remove(tmpFile.Name())
-
-	if _, err := tmpFile.Write(content); err != nil {
-		t.Fatal(err)
-	}
-	tmpFile.Close()
-
-	reader := NewCompositeReader()
-	ctx := context.Background()
-
-	t.Run("file artifact loading", func(t *testing.T) {
-		ref := domain.ArtifactRef{
-			Type: domain.ArtifactRefFile,
-			URI:  tmpFile.Name(),
-		}
-		art, err := reader.Read(ctx, ref)
-		if err != nil {
-			t.Fatalf("unexpected error: %v", err)
-		}
-		if string(art.Body) != string(content) {
-			t.Errorf("expected %s, got %s", string(content), string(art.Body))
-		}
-		if art.Name == "" {
-			t.Error("expected name to be inferred from filename")
-		}
-		if art.Hash != "60f5237ed4049f0382661ef009d2bc42e48c3ceb3edb6600f7024e7ab3b838f3" {
-			t.Errorf("unexpected hash: %s", art.Hash)
-		}
-	})
-
-	t.Run("missing file path", func(t *testing.T) {
-		ref := domain.ArtifactRef{
-			Type: domain.ArtifactRefFile,
-			URI:  "",
-		}
-		_, err := reader.Read(ctx, ref)
-		if !errors.Is(err, ErrMissingFilePath) {
-			t.Errorf("expected ErrMissingFilePath, got %v", err)
-		}
-	})
-}

internal/config/config.go

@@ -1,250 +0,0 @@
-package config
-
-import (
-	"bytes"
-	"errors"
-	"fmt"
-	"io"
-	"os"
-	"path/filepath"
-	"strings"
-
-	"gitea.maximumdirect.net/eric/scriptorium/internal/defaults"
-	renderformat "gitea.maximumdirect.net/eric/scriptorium/internal/format"
-	"gopkg.in/yaml.v3"
-)
-
-const (
-	DefaultConfigPath      = "/etc/scriptorium/config.yml"
-	DefaultConfigPathLocal = "/usr/local/etc/scriptorium/config.yml"
-)
-
-var defaultConfigSearchPaths = []string{
-	DefaultConfigPathLocal,
-	DefaultConfigPath,
-}
-
-var (
-	ErrConfigNotFound    = errors.New("config file not found")
-	ErrInvalidConfigYAML = errors.New("invalid config YAML")
-	ErrInvalidConfig     = errors.New("invalid config")
-)
-
-// Config is the on-disk YAML shape for application-level settings.
-type Config struct {
-	PromptDir  string         `yaml:"prompt_dir"`
-	ProfileDir string         `yaml:"profile_dir"`
-	SchemaDir  string         `yaml:"schema_dir"`
-	Server     ServerConfig   `yaml:"server"`
-	Defaults   DefaultsConfig `yaml:"defaults"`
-}
-
-type ServerConfig struct {
-	Addr             string `yaml:"addr"`
-	ArtifactRoot     string `yaml:"artifact_root"`
-	MaxRequestBytes  *int64 `yaml:"max_request_bytes"`
-	MaxArtifactBytes *int64 `yaml:"max_artifact_bytes"`
-	MaxResponseBytes *int64 `yaml:"max_response_bytes"`
-}
-
-type DefaultsConfig struct {
-	RenderFormat string `yaml:"render_format"`
-}
-
-// AppSettings is the resolved application settings used by adapters.
-type AppSettings struct {
-	PromptDir           string
-	ProfileDir          string
-	SchemaDir           string
-	ServerAddr          string
-	ArtifactRoot        string
-	MaxRequestBytes     int64
-	MaxArtifactBytes    int64
-	MaxResponseBytes    int64
-	DefaultRenderFormat renderformat.PreparedRunOutputFormat
-}
-
-// CLIOverrides can be applied after config load to enforce precedence.
-type CLIOverrides struct {
-	PromptDir        string
-	ProfileDir       string
-	SchemaDir        string
-	ServerAddr       string
-	ArtifactRoot     string
-	MaxRequestBytes  *int64
-	MaxArtifactBytes *int64
-	MaxResponseBytes *int64
-	RenderFormat     string
-}
-
-// BuiltInDefaults returns compile-time application defaults.
-func BuiltInDefaults() AppSettings {
-	return AppSettings{
-		SchemaDir:           defaults.SchemaDirDefault,
-		ServerAddr:          defaults.HTTPAddrDefault,
-		MaxRequestBytes:     defaults.HTTPMaxRequestBytesDefault,
-		MaxArtifactBytes:    defaults.HTTPMaxArtifactBytesDefault,
-		MaxResponseBytes:    defaults.HTTPMaxResponseBytesDefault,
-		DefaultRenderFormat: renderformat.DefaultPreparedRunOutputFormat,
-	}
-}
-
-// LoadConfig loads and resolves app settings from YAML.
-//
-// If explicit is false and the file does not exist, built-in defaults are returned.
-// If explicit is true, missing file is an error.
-func LoadConfig(path string, explicit bool) (AppSettings, error) {
-	resolved := BuiltInDefaults()
-	configPath := strings.TrimSpace(path)
-	if configPath == "" {
-		if explicit {
-			configPath = DefaultConfigPath
-		} else {
-			for _, candidate := range defaultConfigSearchPaths {
-				if _, err := os.Stat(candidate); err == nil {
-					configPath = candidate
-					break
-				} else if !errors.Is(err, os.ErrNotExist) {
-					return AppSettings{}, fmt.Errorf("failed to stat config file %q: %w", candidate, err)
-				}
-			}
-		}
-	}
-	if configPath == "" {
-		if explicit {
-			return AppSettings{}, fmt.Errorf("%w: %s", ErrConfigNotFound, DefaultConfigPath)
-		}
-		return resolved, nil
-	}
-	configPath = filepath.Clean(configPath)
-
-	raw, err := os.ReadFile(configPath)
-	if err != nil {
-		if errors.Is(err, os.ErrNotExist) {
-			if explicit {
-				return AppSettings{}, fmt.Errorf("%w: %s", ErrConfigNotFound, configPath)
-			}
-			return resolved, nil
-		}
-		return AppSettings{}, fmt.Errorf("failed to read config file %q: %w", configPath, err)
-	}
-
-	cfg, err := decodeConfig(raw)
-	if err != nil {
-		return AppSettings{}, err
-	}
-
-	resolved, err = applyConfig(resolved, cfg)
-	if err != nil {
-		return AppSettings{}, err
-	}
-	return resolved, nil
-}
-
-// ApplyCLIOverrides applies CLI-provided overrides over resolved config settings.
-func ApplyCLIOverrides(base AppSettings, overrides CLIOverrides) (AppSettings, error) {
-	out := base
-
-	if v := strings.TrimSpace(overrides.PromptDir); v != "" {
-		out.PromptDir = filepath.Clean(v)
-	}
-	if v := strings.TrimSpace(overrides.ProfileDir); v != "" {
-		out.ProfileDir = filepath.Clean(v)
-	}
-	if v := strings.TrimSpace(overrides.SchemaDir); v != "" {
-		out.SchemaDir = filepath.Clean(v)
-	}
-	if v := strings.TrimSpace(overrides.ServerAddr); v != "" {
-		out.ServerAddr = v
-	}
-	if v := strings.TrimSpace(overrides.ArtifactRoot); v != "" {
-		out.ArtifactRoot = filepath.Clean(v)
-	}
-	if overrides.MaxRequestBytes != nil {
-		if *overrides.MaxRequestBytes < 0 {
-			return AppSettings{}, fmt.Errorf("%w: server.max_request_bytes must be greater than or equal to 0", ErrInvalidConfig)
-		}
-		out.MaxRequestBytes = *overrides.MaxRequestBytes
-	}
-	if overrides.MaxArtifactBytes != nil {
-		if *overrides.MaxArtifactBytes < 0 {
-			return AppSettings{}, fmt.Errorf("%w: server.max_artifact_bytes must be greater than or equal to 0", ErrInvalidConfig)
-		}
-		out.MaxArtifactBytes = *overrides.MaxArtifactBytes
-	}
-	if overrides.MaxResponseBytes != nil {
-		if *overrides.MaxResponseBytes < 0 {
-			return AppSettings{}, fmt.Errorf("%w: server.max_response_bytes must be greater than or equal to 0", ErrInvalidConfig)
-		}
-		out.MaxResponseBytes = *overrides.MaxResponseBytes
-	}
-	if rawFormat := strings.TrimSpace(overrides.RenderFormat); rawFormat != "" {
-		parsed, err := renderformat.ParsePreparedRunOutputFormat(rawFormat)
-		if err != nil {
-			return AppSettings{}, fmt.Errorf("%w: defaults.render_format: %v", ErrInvalidConfig, err)
-		}
-		out.DefaultRenderFormat = parsed
-	}
-
-	return out, nil
-}
-
-func decodeConfig(raw []byte) (Config, error) {
-	var cfg Config
-	decoder := yaml.NewDecoder(bytes.NewReader(raw))
-	decoder.KnownFields(true)
-	if err := decoder.Decode(&cfg); err != nil {
-		if errors.Is(err, io.EOF) {
-			return Config{}, nil
-		}
-		return Config{}, fmt.Errorf("%w: %v", ErrInvalidConfigYAML, err)
-	}
-	return cfg, nil
-}
-
-func applyConfig(base AppSettings, cfg Config) (AppSettings, error) {
-	out := base
-
-	if v := strings.TrimSpace(cfg.PromptDir); v != "" {
-		out.PromptDir = filepath.Clean(v)
-	}
-	if v := strings.TrimSpace(cfg.ProfileDir); v != "" {
-		out.ProfileDir = filepath.Clean(v)
-	}
-	if v := strings.TrimSpace(cfg.SchemaDir); v != "" {
-		out.SchemaDir = filepath.Clean(v)
-	}
-	if v := strings.TrimSpace(cfg.Server.Addr); v != "" {
-		out.ServerAddr = v
-	}
-	if v := strings.TrimSpace(cfg.Server.ArtifactRoot); v != "" {
-		out.ArtifactRoot = filepath.Clean(v)
-	}
-	if cfg.Server.MaxRequestBytes != nil {
-		if *cfg.Server.MaxRequestBytes < 0 {
-			return AppSettings{}, fmt.Errorf("%w: server.max_request_bytes must be greater than or equal to 0", ErrInvalidConfig)
-		}
-		out.MaxRequestBytes = *cfg.Server.MaxRequestBytes
-	}
-	if cfg.Server.MaxArtifactBytes != nil {
-		if *cfg.Server.MaxArtifactBytes < 0 {
-			return AppSettings{}, fmt.Errorf("%w: server.max_artifact_bytes must be greater than or equal to 0", ErrInvalidConfig)
-		}
-		out.MaxArtifactBytes = *cfg.Server.MaxArtifactBytes
-	}
-	if cfg.Server.MaxResponseBytes != nil {
-		if *cfg.Server.MaxResponseBytes < 0 {
-			return AppSettings{}, fmt.Errorf("%w: server.max_response_bytes must be greater than or equal to 0", ErrInvalidConfig)
-		}
-		out.MaxResponseBytes = *cfg.Server.MaxResponseBytes
-	}
-	if rawFormat := strings.TrimSpace(cfg.Defaults.RenderFormat); rawFormat != "" {
-		parsed, err := renderformat.ParsePreparedRunOutputFormat(rawFormat)
-		if err != nil {
-			return AppSettings{}, fmt.Errorf("%w: defaults.render_format: %v", ErrInvalidConfig, err)
-		}
-		out.DefaultRenderFormat = parsed
-	}
-
-	return out, nil
-}

internal/config/config_test.go

@@ -1,350 +0,0 @@
-package config
-
-import (
-	"errors"
-	"os"
-	"path/filepath"
-	"testing"
-
-	"gitea.maximumdirect.net/eric/scriptorium/internal/defaults"
-	renderformat "gitea.maximumdirect.net/eric/scriptorium/internal/format"
-)
-
-func TestLoadConfigMissingImplicitPathUsesBuiltInDefaults(t *testing.T) {
-	tmp := t.TempDir()
-	missing := filepath.Join(tmp, "missing.yml")
-
-	got, err := LoadConfig(missing, false)
-	if err != nil {
-		t.Fatalf("expected no error, got %v", err)
-	}
-
-	want := BuiltInDefaults()
-	if got != want {
-		t.Fatalf("unexpected settings: got=%+v want=%+v", got, want)
-	}
-}
-
-func TestBuiltInDefaultsIncludeHTTPSizeLimits(t *testing.T) {
-	got := BuiltInDefaults()
-
-	if got.MaxRequestBytes != defaults.HTTPMaxRequestBytesDefault {
-		t.Fatalf("unexpected max request bytes: %d", got.MaxRequestBytes)
-	}
-	if got.MaxArtifactBytes != defaults.HTTPMaxArtifactBytesDefault {
-		t.Fatalf("unexpected max artifact bytes: %d", got.MaxArtifactBytes)
-	}
-	if got.MaxResponseBytes != defaults.HTTPMaxResponseBytesDefault {
-		t.Fatalf("unexpected max response bytes: %d", got.MaxResponseBytes)
-	}
-}
-
-func TestLoadConfigMissingExplicitPathReturnsError(t *testing.T) {
-	tmp := t.TempDir()
-	missing := filepath.Join(tmp, "missing.yml")
-
-	_, err := LoadConfig(missing, true)
-	if err == nil {
-		t.Fatal("expected error for missing explicit config")
-	}
-	if !errors.Is(err, ErrConfigNotFound) {
-		t.Fatalf("expected ErrConfigNotFound, got %v", err)
-	}
-}
-
-func TestLoadConfigInvalidYAMLReturnsError(t *testing.T) {
-	path := writeConfigFile(t, "config.yml", "prompt_dir: [")
-
-	_, err := LoadConfig(path, true)
-	if err == nil {
-		t.Fatal("expected invalid YAML error")
-	}
-	if !errors.Is(err, ErrInvalidConfigYAML) {
-		t.Fatalf("expected ErrInvalidConfigYAML, got %v", err)
-	}
-}
-
-func TestLoadConfigInvalidYAMLImplicitPathReturnsError(t *testing.T) {
-	path := writeConfigFile(t, "config.yml", "prompt_dir: [")
-
-	_, err := LoadConfig(path, false)
-	if err == nil {
-		t.Fatal("expected invalid YAML error")
-	}
-	if !errors.Is(err, ErrInvalidConfigYAML) {
-		t.Fatalf("expected ErrInvalidConfigYAML, got %v", err)
-	}
-}
-
-func TestLoadConfigUnknownFieldReturnsError(t *testing.T) {
-	path := writeConfigFile(t, "config.yml", "unknown_field: true\n")
-
-	_, err := LoadConfig(path, true)
-	if err == nil {
-		t.Fatal("expected unknown field error")
-	}
-	if !errors.Is(err, ErrInvalidConfigYAML) {
-		t.Fatalf("expected ErrInvalidConfigYAML, got %v", err)
-	}
-}
-
-func TestLoadConfigAPIKeyFieldIsRejectedAsUnknown(t *testing.T) {
-	path := writeConfigFile(t, "config.yml", "api_key: secret\n")
-
-	_, err := LoadConfig(path, true)
-	if err == nil {
-		t.Fatal("expected unknown field error for api_key")
-	}
-	if !errors.Is(err, ErrInvalidConfigYAML) {
-		t.Fatalf("expected ErrInvalidConfigYAML, got %v", err)
-	}
-}
-
-func TestLoadConfigValidConfigSetsDirectoriesAndServerAddr(t *testing.T) {
-	path := writeConfigFile(t, "config.yml", `
-prompt_dir: ./prompts
-profile_dir: ./profiles
-schema_dir: ./schemas
-server:
-  addr: 127.0.0.1:9090
-  artifact_root: ./artifacts
-  max_request_bytes: 1024
-  max_artifact_bytes: 2048
-  max_response_bytes: 4096
-defaults:
-  render_format: json
-`)
-
-	got, err := LoadConfig(path, true)
-	if err != nil {
-		t.Fatalf("expected no error, got %v", err)
-	}
-
-	if got.PromptDir != filepath.Clean("./prompts") {
-		t.Fatalf("unexpected prompt_dir: %q", got.PromptDir)
-	}
-	if got.ProfileDir != filepath.Clean("./profiles") {
-		t.Fatalf("unexpected profile_dir: %q", got.ProfileDir)
-	}
-	if got.SchemaDir != filepath.Clean("./schemas") {
-		t.Fatalf("unexpected schema_dir: %q", got.SchemaDir)
-	}
-	if got.ServerAddr != "127.0.0.1:9090" {
-		t.Fatalf("unexpected server.addr: %q", got.ServerAddr)
-	}
-	if got.ArtifactRoot != filepath.Clean("./artifacts") {
-		t.Fatalf("unexpected server.artifact_root: %q", got.ArtifactRoot)
-	}
-	if got.MaxRequestBytes != 1024 {
-		t.Fatalf("unexpected server.max_request_bytes: %d", got.MaxRequestBytes)
-	}
-	if got.MaxArtifactBytes != 2048 {
-		t.Fatalf("unexpected server.max_artifact_bytes: %d", got.MaxArtifactBytes)
-	}
-	if got.MaxResponseBytes != 4096 {
-		t.Fatalf("unexpected server.max_response_bytes: %d", got.MaxResponseBytes)
-	}
-	if got.DefaultRenderFormat != renderformat.PreparedRunFormatJSON {
-		t.Fatalf("unexpected defaults.render_format: %q", got.DefaultRenderFormat)
-	}
-}
-
-func TestLoadConfigAcceptsZeroHTTPSizeLimits(t *testing.T) {
-	path := writeConfigFile(t, "config.yml", `
-server:
-  max_request_bytes: 0
-  max_artifact_bytes: 0
-  max_response_bytes: 0
-`)
-
-	got, err := LoadConfig(path, true)
-	if err != nil {
-		t.Fatalf("expected no error, got %v", err)
-	}
-	if got.MaxRequestBytes != 0 || got.MaxArtifactBytes != 0 || got.MaxResponseBytes != 0 {
-		t.Fatalf("expected zero limits to be preserved, got request=%d artifact=%d response=%d", got.MaxRequestBytes, got.MaxArtifactBytes, got.MaxResponseBytes)
-	}
-}
-
-func TestLoadConfigRejectsNegativeHTTPSizeLimits(t *testing.T) {
-	tests := []struct {
-		name string
-		body string
-	}{
-		{name: "request", body: "server:\n  max_request_bytes: -1\n"},
-		{name: "artifact", body: "server:\n  max_artifact_bytes: -1\n"},
-		{name: "response", body: "server:\n  max_response_bytes: -1\n"},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			path := writeConfigFile(t, "config.yml", tc.body)
-			_, err := LoadConfig(path, true)
-			if !errors.Is(err, ErrInvalidConfig) {
-				t.Fatalf("expected ErrInvalidConfig, got %v", err)
-			}
-		})
-	}
-}
-
-func TestLoadConfigEmptyFileResolvesToBuiltInDefaults(t *testing.T) {
-	path := writeConfigFile(t, "config.yml", "")
-
-	got, err := LoadConfig(path, true)
-	if err != nil {
-		t.Fatalf("expected no error, got %v", err)
-	}
-
-	want := BuiltInDefaults()
-	if got != want {
-		t.Fatalf("unexpected settings: got=%+v want=%+v", got, want)
-	}
-}
-
-func TestLoadConfigImplicitSearchPrefersUsrLocalEtcOverEtc(t *testing.T) {
-	tmp := t.TempDir()
-	localPath := filepath.Join(tmp, "usr-local.yml")
-	etcPath := filepath.Join(tmp, "etc.yml")
-
-	if err := os.WriteFile(localPath, []byte("prompt_dir: ./from-usr-local\n"), 0o644); err != nil {
-		t.Fatal(err)
-	}
-	if err := os.WriteFile(etcPath, []byte("prompt_dir: ./from-etc\n"), 0o644); err != nil {
-		t.Fatal(err)
-	}
-
-	orig := defaultConfigSearchPaths
-	defaultConfigSearchPaths = []string{localPath, etcPath}
-	t.Cleanup(func() { defaultConfigSearchPaths = orig })
-
-	got, err := LoadConfig("", false)
-	if err != nil {
-		t.Fatalf("expected no error, got %v", err)
-	}
-	if got.PromptDir != filepath.Clean("./from-usr-local") {
-		t.Fatalf("expected usr-local config to win, got prompt_dir=%q", got.PromptDir)
-	}
-}
-
-func TestLoadConfigImplicitSearchFallsBackToEtcWhenUsrLocalMissing(t *testing.T) {
-	tmp := t.TempDir()
-	missingLocal := filepath.Join(tmp, "missing-local.yml")
-	etcPath := filepath.Join(tmp, "etc.yml")
-
-	if err := os.WriteFile(etcPath, []byte("prompt_dir: ./from-etc\n"), 0o644); err != nil {
-		t.Fatal(err)
-	}
-
-	orig := defaultConfigSearchPaths
-	defaultConfigSearchPaths = []string{missingLocal, etcPath}
-	t.Cleanup(func() { defaultConfigSearchPaths = orig })
-
-	got, err := LoadConfig("", false)
-	if err != nil {
-		t.Fatalf("expected no error, got %v", err)
-	}
-	if got.PromptDir != filepath.Clean("./from-etc") {
-		t.Fatalf("expected etc fallback config, got prompt_dir=%q", got.PromptDir)
-	}
-}
-
-func TestApplyCLIOverridesAppliesPrecedence(t *testing.T) {
-	base := AppSettings{
-		PromptDir:           "/from/config/prompts",
-		ProfileDir:          "/from/config/profiles",
-		SchemaDir:           "/from/config/schemas",
-		ServerAddr:          ":1234",
-		ArtifactRoot:        "/from/config/artifacts",
-		MaxRequestBytes:     111,
-		MaxArtifactBytes:    222,
-		MaxResponseBytes:    333,
-		DefaultRenderFormat: renderformat.PreparedRunFormatJSON,
-	}
-	maxRequestBytes := int64(0)
-	maxArtifactBytes := int64(444)
-	maxResponseBytes := int64(555)
-
-	got, err := ApplyCLIOverrides(base, CLIOverrides{
-		PromptDir:        "./prompts-cli",
-		ProfileDir:       "./profiles-cli",
-		SchemaDir:        "./schemas-cli",
-		ServerAddr:       ":8081",
-		ArtifactRoot:     "./artifacts-cli",
-		MaxRequestBytes:  &maxRequestBytes,
-		MaxArtifactBytes: &maxArtifactBytes,
-		MaxResponseBytes: &maxResponseBytes,
-		RenderFormat:     "text",
-	})
-	if err != nil {
-		t.Fatalf("expected no error, got %v", err)
-	}
-
-	if got.PromptDir != filepath.Clean("./prompts-cli") {
-		t.Fatalf("unexpected prompt dir: %q", got.PromptDir)
-	}
-	if got.ProfileDir != filepath.Clean("./profiles-cli") {
-		t.Fatalf("unexpected profile dir: %q", got.ProfileDir)
-	}
-	if got.SchemaDir != filepath.Clean("./schemas-cli") {
-		t.Fatalf("unexpected schema dir: %q", got.SchemaDir)
-	}
-	if got.ServerAddr != ":8081" {
-		t.Fatalf("unexpected server addr: %q", got.ServerAddr)
-	}
-	if got.ArtifactRoot != filepath.Clean("./artifacts-cli") {
-		t.Fatalf("unexpected artifact root: %q", got.ArtifactRoot)
-	}
-	if got.MaxRequestBytes != 0 {
-		t.Fatalf("unexpected max request bytes: %d", got.MaxRequestBytes)
-	}
-	if got.MaxArtifactBytes != 444 {
-		t.Fatalf("unexpected max artifact bytes: %d", got.MaxArtifactBytes)
-	}
-	if got.MaxResponseBytes != 555 {
-		t.Fatalf("unexpected max response bytes: %d", got.MaxResponseBytes)
-	}
-	if got.DefaultRenderFormat != renderformat.PreparedRunFormatText {
-		t.Fatalf("unexpected render format: %q", got.DefaultRenderFormat)
-	}
-}
-
-func TestApplyCLIOverridesRejectsNegativeHTTPSizeLimits(t *testing.T) {
-	negative := int64(-1)
-
-	tests := []struct {
-		name      string
-		overrides CLIOverrides
-	}{
-		{name: "request", overrides: CLIOverrides{MaxRequestBytes: &negative}},
-		{name: "artifact", overrides: CLIOverrides{MaxArtifactBytes: &negative}},
-		{name: "response", overrides: CLIOverrides{MaxResponseBytes: &negative}},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			_, err := ApplyCLIOverrides(BuiltInDefaults(), tc.overrides)
-			if !errors.Is(err, ErrInvalidConfig) {
-				t.Fatalf("expected ErrInvalidConfig, got %v", err)
-			}
-		})
-	}
-}
-
-func TestApplyCLIOverridesInvalidRenderFormatReturnsError(t *testing.T) {
-	_, err := ApplyCLIOverrides(BuiltInDefaults(), CLIOverrides{RenderFormat: "yaml"})
-	if err == nil {
-		t.Fatal("expected invalid render format error")
-	}
-	if !errors.Is(err, ErrInvalidConfig) {
-		t.Fatalf("expected ErrInvalidConfig, got %v", err)
-	}
-}
-
-func writeConfigFile(t *testing.T, name, content string) string {
-	t.Helper()
-	path := filepath.Join(t.TempDir(), name)
-	if err := os.WriteFile(path, []byte(content), 0o644); err != nil {
-		t.Fatalf("failed to write config file: %v", err)
-	}
-	return path
-}

internal/config/document.go

@@ -0,0 +1,109 @@
+package config
+
+import (
+	"path/filepath"
+	"strings"
+
+	configkit "gitea.maximumdirect.net/eric/ConfigKit"
+	"gitea.maximumdirect.net/eric/scriptorium/internal/defaults"
+	renderformat "gitea.maximumdirect.net/eric/scriptorium/internal/format"
+)
+
+// Document is Scriptorium's ConfigKit-native application configuration shape.
+type Document struct {
+	PromptDir        string                     `yaml:"prompt_dir"`
+	ProfileDir       string                     `yaml:"profile_dir"`
+	SchemaDir        string                     `yaml:"schema_dir"`
+	TransientRetries *int                       `yaml:"transient_retries"`
+	Server           ServerDocument             `yaml:"server"`
+	Defaults         DefaultsDocument           `yaml:"defaults"`
+	Backends         map[string]BackendDocument `yaml:"backends"`
+}
+
+type BackendDocument struct {
+	Endpoint         string         `yaml:"endpoint"`
+	APIKeyEnv        string         `yaml:"api_key_env"`
+	ExtraParams      map[string]any `yaml:"extra_params"`
+	ConcurrencyLimit int            `yaml:"concurrency_limit"`
+	QueueCapacity    *int           `yaml:"queue_capacity"`
+}
+
+type ServerDocument struct {
+	Addr             string `yaml:"addr"`
+	ArtifactRoot     string `yaml:"artifact_root"`
+	MaxRequestBytes  int64  `yaml:"max_request_bytes"`
+	MaxArtifactBytes int64  `yaml:"max_artifact_bytes"`
+	MaxResponseBytes int64  `yaml:"max_response_bytes"`
+}
+
+type DefaultsDocument struct {
+	RenderFormat string `yaml:"render_format"`
+}
+
+func documentDefinition() configkit.Definition[Document] {
+	return configkit.Definition[Document]{
+		Defaults: documentDefaults,
+		Resolve:  resolveDocument,
+		Validate: validateDocument,
+	}
+}
+
+func documentDefaults() Document {
+	return Document{
+		SchemaDir: defaults.SchemaDirDefault,
+		Server: ServerDocument{
+			Addr:             defaults.HTTPAddrDefault,
+			MaxRequestBytes:  defaults.HTTPMaxRequestBytesDefault,
+			MaxArtifactBytes: defaults.HTTPMaxArtifactBytesDefault,
+			MaxResponseBytes: defaults.HTTPMaxResponseBytesDefault,
+		},
+		Defaults: DefaultsDocument{RenderFormat: string(renderformat.DefaultPreparedRunOutputFormat)},
+	}
+}
+
+func resolveDocument(document *Document, resolution *configkit.Resolution) error {
+	normalizePath := func(path configkit.Path, value *string) {
+		cleaned := strings.TrimSpace(*value)
+		if cleaned != "" {
+			cleaned = filepath.Clean(cleaned)
+		}
+		if cleaned != *value {
+			configkit.Normalize(resolution, path, value, cleaned, "normalized application path")
+		}
+	}
+	normalizeString := func(path configkit.Path, value *string, normalized, reason string) {
+		if normalized != *value {
+			configkit.Normalize(resolution, path, value, normalized, reason)
+		}
+	}
+
+	normalizePath(configkit.Keys("prompt_dir"), &document.PromptDir)
+	normalizePath(configkit.Keys("profile_dir"), &document.ProfileDir)
+	normalizePath(configkit.Keys("schema_dir"), &document.SchemaDir)
+	normalizePath(configkit.Keys("server", "artifact_root"), &document.Server.ArtifactRoot)
+	normalizeString(configkit.Keys("server", "addr"), &document.Server.Addr,
+		strings.TrimSpace(document.Server.Addr), "trimmed server address")
+	normalizeString(configkit.Keys("defaults", "render_format"), &document.Defaults.RenderFormat,
+		strings.ToLower(strings.TrimSpace(document.Defaults.RenderFormat)), "normalized render format")
+	return nil
+}
+
+func validateDocument(document *Document, validation *configkit.Validation) {
+	if document.TransientRetries != nil && *document.TransientRetries < 0 {
+		validation.Error(configkit.Keys("transient_retries"), "must be greater than or equal to zero")
+	}
+	if document.Server.MaxRequestBytes < 0 {
+		validation.Error(configkit.Keys("server", "max_request_bytes"), "must be greater than or equal to zero")
+	}
+	if document.Server.MaxArtifactBytes < 0 {
+		validation.Error(configkit.Keys("server", "max_artifact_bytes"), "must be greater than or equal to zero")
+	}
+	if document.Server.MaxResponseBytes < 0 {
+		validation.Error(configkit.Keys("server", "max_response_bytes"), "must be greater than or equal to zero")
+	}
+	switch document.Defaults.RenderFormat {
+	case string(renderformat.OutputFormatText), string(renderformat.OutputFormatJSON):
+	default:
+		validation.Error(configkit.Keys("defaults", "render_format"), "must be text or json")
+	}
+}

internal/config/document_test.go

@@ -0,0 +1,163 @@
+package config
+
+import (
+	"bytes"
+	"errors"
+	"reflect"
+	"strings"
+	"testing"
+
+	configkit "gitea.maximumdirect.net/eric/ConfigKit"
+)
+
+func loadDocumentBytes(content string) (*configkit.Result[Document], error) {
+	return configkit.Load(configkit.Bytes("application.yml", []byte(content)), configkit.Options[Document]{
+		Definition: documentDefinition(),
+	})
+}
+
+func TestDocumentDefaultsAndExplicitValues(t *testing.T) {
+	defaultsOnly, err := configkit.Load(configkit.NoSource(), configkit.Options[Document]{Definition: documentDefinition()})
+	if err != nil {
+		t.Fatalf("defaults-only load: %v", err)
+	}
+	if !reflect.DeepEqual(defaultsOnly.Config, documentDefaults()) || len(defaultsOnly.Sources()) != 0 {
+		t.Fatalf("unexpected defaults-only result: %+v sources=%+v", defaultsOnly.Config, defaultsOnly.Sources())
+	}
+
+	result, err := loadDocumentBytes(`prompt_dir: ""
+profile_dir: ""
+schema_dir: ""
+transient_retries: 0
+server:
+  addr: ""
+  artifact_root: ""
+  max_request_bytes: 0
+  max_artifact_bytes: 0
+  max_response_bytes: 0
+defaults:
+  render_format: " JSON "
+backends:
+  local:
+    endpoint: "http://fixture.invalid/v1"
+    queue_capacity: 0
+    extra_params:
+      sample_count: 23
+`)
+	if err != nil {
+		t.Fatalf("explicit-value load: %v", err)
+	}
+	config := result.Config
+	if config.SchemaDir != "" || config.Server.Addr != "" || config.Server.MaxRequestBytes != 0 || config.Server.MaxArtifactBytes != 0 || config.Server.MaxResponseBytes != 0 {
+		t.Fatalf("explicit empty and zero values did not replace defaults: %+v", config)
+	}
+	if config.TransientRetries == nil || *config.TransientRetries != 0 {
+		t.Fatalf("explicit zero retry budget lost: %+v", config.TransientRetries)
+	}
+	if backend := config.Backends["local"]; backend.QueueCapacity == nil || *backend.QueueCapacity != 0 || backend.ExtraParams["sample_count"] != int64(23) {
+		t.Fatalf("backend presence or dynamic integer changed: %+v", backend)
+	}
+	if config.Defaults.RenderFormat != "json" {
+		t.Fatalf("render format normalization failed: %q", config.Defaults.RenderFormat)
+	}
+
+	nullable, err := loadDocumentBytes("transient_retries: null\nbackends:\n  local:\n    queue_capacity: null\n")
+	if err != nil {
+		t.Fatalf("nullable-value load: %v", err)
+	}
+	if nullable.Config.TransientRetries != nil || nullable.Config.Backends["local"].QueueCapacity != nil {
+		t.Fatalf("nullable fields did not remain nil: %+v", nullable.Config)
+	}
+
+	nullBackends, err := loadDocumentBytes("backends: null\n")
+	if err != nil || nullBackends.Config.Backends != nil {
+		t.Fatalf("nullable backend map did not remain nil: %+v error=%v", nullBackends, err)
+	}
+}
+
+func TestDocumentRecordsEffectiveNormalization(t *testing.T) {
+	result, err := loadDocumentBytes(`prompt_dir: "  ./one/../two  "
+profile_dir: "  "
+server:
+  artifact_root: " ./data/../artifacts "
+  addr: "  :9000  "
+defaults:
+  render_format: " JSON "
+`)
+	if err != nil {
+		t.Fatalf("load normalized document: %v", err)
+	}
+	if result.Config.PromptDir != "two" || result.Config.ProfileDir != "" || result.Config.Server.ArtifactRoot != "artifacts" || result.Config.Server.Addr != ":9000" {
+		t.Fatalf("unexpected normalized values: %+v", result.Config)
+	}
+	var effective bytes.Buffer
+	if err := result.WriteEffective(&effective); err != nil {
+		t.Fatalf("write effective configuration: %v", err)
+	}
+	for _, fragment := range []string{"prompt_dir: two", "profile_dir: ''", "artifact_root: artifacts", "addr: :9000", "render_format: json"} {
+		if !strings.Contains(effective.String(), fragment) {
+			t.Fatalf("effective output omitted %q: %s", fragment, effective.String())
+		}
+	}
+	explanation, known := result.Explain(configkit.Keys("prompt_dir"))
+	if !known || explanation.Effective.YAML != "two\n" {
+		t.Fatalf("explanation does not agree with effective value: %+v known=%t", explanation, known)
+	}
+	found := false
+	for _, change := range explanation.History {
+		if change.Origin.Operation == configkit.ChangeNormalization {
+			found = true
+		}
+	}
+	if !found {
+		t.Fatalf("normalization was not recorded: %+v", explanation.History)
+	}
+}
+
+func TestDocumentValidationIsSafeAndPathSpecific(t *testing.T) {
+	for _, tc := range []struct{ name, content, path string }{
+		{"negative retry", "transient_retries: -9173\n", "/transient_retries"},
+		{"negative request limit", "server:\n  max_request_bytes: -9173\n", "/server/max_request_bytes"},
+		{"negative artifact limit", "server:\n  max_artifact_bytes: -9173\n", "/server/max_artifact_bytes"},
+		{"negative response limit", "server:\n  max_response_bytes: -9173\n", "/server/max_response_bytes"},
+		{"empty format", "defaults:\n  render_format: \"\"\n", "/defaults/render_format"},
+		{"unknown format", "defaults:\n  render_format: private-invalid-value\n", "/defaults/render_format"},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			_, err := loadDocumentBytes(tc.content)
+			var loadError *configkit.LoadError
+			if !errors.As(err, &loadError) {
+				t.Fatalf("expected typed validation error, got %v", err)
+			}
+			found := false
+			for _, diagnostic := range loadError.Diagnostics() {
+				if diagnostic.Code == configkit.CodeValidateError && diagnostic.Path.String() == tc.path {
+					found = true
+				}
+				if strings.Contains(diagnostic.Message, "9173") || strings.Contains(diagnostic.Message, "private-invalid-value") {
+					t.Fatalf("diagnostic disclosed rejected value: %+v", diagnostic)
+				}
+			}
+			if !found {
+				t.Fatalf("expected validation at %s, got %+v", tc.path, loadError.Diagnostics())
+			}
+		})
+	}
+}
+
+func TestDocumentRejectsNativeShapeErrors(t *testing.T) {
+	for _, content := range []string{
+		"server: null\n",
+		"defaults: null\n",
+		"server:\n  addr: null\n",
+		"server:\n  max_request_bytes: null\n",
+		"defaults:\n  render_format: null\n",
+		"server:\n  unknown_field: 1\n",
+		"backends:\n  local:\n    unknown_field: 1\n",
+	} {
+		_, err := loadDocumentBytes(content)
+		if err == nil {
+			t.Fatalf("unexpected acceptance of %q", content)
+		}
+	}
+}

internal/config/load.go

@@ -0,0 +1,96 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"sort"
+
+	configkit "gitea.maximumdirect.net/eric/ConfigKit"
+	renderformat "gitea.maximumdirect.net/eric/scriptorium/internal/format"
+)
+
+// LoadOptions selects one application source and explicit configuration values.
+type LoadOptions struct {
+	Path      string
+	Explicit  bool
+	Overlay   string
+	Overrides []configkit.Override
+}
+
+// Load resolves one ConfigKit document and retains its inspection snapshot.
+func Load(options LoadOptions) (*configkit.Result[Document], error) {
+	var source configkit.Source
+	fileBacked := false
+	if options.Explicit {
+		source = configkit.File(options.Path)
+		fileBacked = true
+	} else {
+		selected := ""
+		for _, candidate := range defaultConfigSearchPaths {
+			if _, err := os.Stat(candidate); err == nil {
+				selected = candidate
+				break
+			} else if !errors.Is(err, os.ErrNotExist) {
+				reason := "filesystem error"
+				if errors.Is(err, os.ErrPermission) {
+					reason = "permission denied"
+				}
+				return nil, fmt.Errorf("cannot inspect configuration path %q: %s", candidate, reason)
+			}
+		}
+		if selected == "" {
+			source = configkit.NoSource()
+		} else {
+			source = configkit.File(selected)
+			fileBacked = true
+		}
+	}
+
+	result, err := configkit.Load(source, configkit.Options[Document]{
+		Definition: documentDefinition(),
+		Imports:    fileBacked,
+		Overlay:    options.Overlay,
+		Overrides:  options.Overrides,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("load application configuration: %w", err)
+	}
+	return result, nil
+}
+
+// Settings converts a validated document without another merge or normalization.
+func Settings(document Document) AppSettings {
+	settings := AppSettings{
+		PromptDir:           document.PromptDir,
+		ProfileDir:          document.ProfileDir,
+		SchemaDir:           document.SchemaDir,
+		ServerAddr:          document.Server.Addr,
+		ArtifactRoot:        document.Server.ArtifactRoot,
+		MaxRequestBytes:     document.Server.MaxRequestBytes,
+		MaxArtifactBytes:    document.Server.MaxArtifactBytes,
+		MaxResponseBytes:    document.Server.MaxResponseBytes,
+		DefaultRenderFormat: renderformat.PreparedRunOutputFormat(document.Defaults.RenderFormat),
+		TransientRetries:    document.TransientRetries,
+	}
+	if document.Backends != nil {
+		ids := make([]string, 0, len(document.Backends))
+		for id := range document.Backends {
+			ids = append(ids, id)
+		}
+		sort.Strings(ids)
+		settings.Backends = make([]BackendSettings, 0, len(ids))
+		for _, id := range ids {
+			backend := document.Backends[id]
+			settings.Backends = append(settings.Backends, BackendSettings{
+				ID:               id,
+				Endpoint:         backend.Endpoint,
+				APIKeyEnv:        backend.APIKeyEnv,
+				ExtraParams:      backend.ExtraParams,
+				ConcurrencyLimit: backend.ConcurrencyLimit,
+				QueueCapacity:    backend.QueueCapacity,
+			})
+		}
+	}
+	return settings
+}

internal/config/load_test.go

@@ -0,0 +1,233 @@
+package config
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"reflect"
+	"strings"
+	"testing"
+
+	configkit "gitea.maximumdirect.net/eric/ConfigKit"
+)
+
+func useConfigSearchPaths(t *testing.T, paths ...string) {
+	t.Helper()
+	previous := defaultConfigSearchPaths
+	defaultConfigSearchPaths = paths
+	t.Cleanup(func() { defaultConfigSearchPaths = previous })
+}
+
+func writeApplicationFile(t *testing.T, path, body string) {
+	t.Helper()
+	if err := os.WriteFile(path, []byte(body), 0o600); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestLoadSelectsOrderedSourceAndKeepsItsSnapshot(t *testing.T) {
+	dir := t.TempDir()
+	first := filepath.Join(dir, "first.yml")
+	second := filepath.Join(dir, "second.yml")
+	writeApplicationFile(t, first, "prompt_dir: ./first\n")
+	writeApplicationFile(t, second, "prompt_dir: ./second\n")
+	useConfigSearchPaths(t, first, second)
+
+	result, err := Load(LoadOptions{Path: filepath.Join(dir, "ignored.yml")})
+	if err != nil {
+		t.Fatalf("load first implicit source: %v", err)
+	}
+	if result.Config.PromptDir != "first" || len(result.Sources()) != 1 || result.Sources()[0].Path != first {
+		t.Fatalf("unexpected implicit source: config=%+v sources=%+v", result.Config, result.Sources())
+	}
+	writeApplicationFile(t, first, "prompt_dir: ./changed\n")
+	if result.Config.PromptDir != "first" {
+		t.Fatalf("result did not retain resolved snapshot: %+v", result.Config)
+	}
+
+	if err := os.Remove(first); err != nil {
+		t.Fatal(err)
+	}
+	result, err = Load(LoadOptions{})
+	if err != nil || result.Config.PromptDir != "second" || result.Sources()[0].Path != second {
+		t.Fatalf("second implicit source not selected: result=%+v err=%v", result, err)
+	}
+
+	result, err = Load(LoadOptions{Path: first, Explicit: true})
+	if result != nil || err == nil {
+		t.Fatalf("missing explicit source was accepted: result=%+v err=%v", result, err)
+	}
+	var loadError *configkit.LoadError
+	if !errors.As(err, &loadError) {
+		t.Fatalf("typed load error was lost: %v", err)
+	}
+}
+
+func TestLoadRejectsExplicitEmptyAndDistinguishesEmptyFile(t *testing.T) {
+	useConfigSearchPaths(t, filepath.Join(t.TempDir(), "absent.yml"))
+	if _, err := Load(LoadOptions{Explicit: true, Path: ""}); err == nil {
+		t.Fatal("explicit empty path was accepted")
+	} else {
+		var loadError *configkit.LoadError
+		if !errors.As(err, &loadError) {
+			t.Fatalf("expected upstream source diagnostic, got %v", err)
+		}
+	}
+
+	dir := t.TempDir()
+	empty := filepath.Join(dir, "empty.yml")
+	writeApplicationFile(t, empty, "")
+	if _, err := Load(LoadOptions{Path: empty, Explicit: true}); err == nil {
+		t.Fatal("empty file was treated as defaults-only")
+	}
+	writeApplicationFile(t, empty, "{}\n")
+	result, err := Load(LoadOptions{Path: empty, Explicit: true})
+	if err != nil || !reflect.DeepEqual(result.Config, documentDefaults()) {
+		t.Fatalf("empty mapping did not load defaults: result=%+v err=%v", result, err)
+	}
+}
+
+func TestLoadDefaultsOnlyAndOverridesBeforeValidation(t *testing.T) {
+	useConfigSearchPaths(t, filepath.Join(t.TempDir(), "absent.yml"))
+	result, err := Load(LoadOptions{})
+	if err != nil || !reflect.DeepEqual(result.Config, documentDefaults()) || len(result.Sources()) != 0 {
+		t.Fatalf("defaults-only load: result=%+v err=%v", result, err)
+	}
+	var effective strings.Builder
+	if err := result.WriteEffective(&effective); err != nil || !strings.Contains(effective.String(), "render_format: text") || len(result.Sources()) != 0 {
+		t.Fatalf("defaults-only inspection changed: effective=%q err=%v sources=%+v", effective.String(), err, result.Sources())
+	}
+
+	result, err = Load(LoadOptions{Overrides: []configkit.Override{{
+		Path: configkit.Keys("server", "max_request_bytes"), Value: int64(0), Flag: "--max-request-bytes",
+	}}})
+	if err != nil || result.Config.Server.MaxRequestBytes != 0 || len(result.Sources()) != 1 || result.Sources()[0].Layer != configkit.LayerCLI {
+		t.Fatalf("defaults-only override lost: result=%+v err=%v", result, err)
+	}
+
+	path := filepath.Join(t.TempDir(), "invalid.yml")
+	writeApplicationFile(t, path, "defaults:\n  render_format: invalid-choice\n")
+	result, err = Load(LoadOptions{Path: path, Explicit: true, Overrides: []configkit.Override{{
+		Path: configkit.Keys("defaults", "render_format"), Value: "json", Flag: "--render-format",
+	}}})
+	if err != nil || result.Config.Defaults.RenderFormat != "json" {
+		t.Fatalf("override did not precede validation: result=%+v err=%v", result, err)
+	}
+	if len(result.Sources()) != 2 || result.Sources()[0].Layer != configkit.LayerBase || result.Sources()[1].Layer != configkit.LayerCLI {
+		t.Fatalf("source order changed: %+v", result.Sources())
+	}
+	writeApplicationFile(t, path, "defaults: [\n")
+	if _, err := Load(LoadOptions{Path: path, Explicit: true, Overrides: []configkit.Override{{
+		Path: configkit.Keys("defaults", "render_format"), Value: "json", Flag: "--render-format",
+	}}}); err == nil {
+		t.Fatal("override bypassed malformed lower-level YAML")
+	}
+}
+
+func TestSettingsCopiesResolvedValuesAndSortsBackends(t *testing.T) {
+	result, err := loadDocumentBytes(`schema_dir: ""
+transient_retries: 0
+server:
+  addr: ""
+  artifact_root: ""
+  max_request_bytes: 0
+defaults:
+  render_format: json
+backends:
+  zed:
+    endpoint: http://zed.invalid/v1
+    extra_params:
+      count: 4
+  alpha:
+    queue_capacity: 0
+`)
+	if err != nil {
+		t.Fatal(err)
+	}
+	settings := Settings(result.Config)
+	if settings.SchemaDir != "" || settings.ServerAddr != "" || settings.MaxRequestBytes != 0 || settings.DefaultRenderFormat != "json" {
+		t.Fatalf("resolved scalar values changed: %+v", settings)
+	}
+	if settings.TransientRetries == nil || *settings.TransientRetries != 0 {
+		t.Fatalf("retry presence lost: %+v", settings.TransientRetries)
+	}
+	if len(settings.Backends) != 2 || settings.Backends[0].ID != "alpha" || settings.Backends[1].ID != "zed" {
+		t.Fatalf("backend order changed: %+v", settings.Backends)
+	}
+	if settings.Backends[0].QueueCapacity == nil || *settings.Backends[0].QueueCapacity != 0 || settings.Backends[1].QueueCapacity != nil {
+		t.Fatalf("queue presence changed: %+v", settings.Backends)
+	}
+	if value := settings.Backends[1].ExtraParams["count"]; value != int64(4) {
+		t.Fatalf("dynamic number changed shape: %T %v", value, value)
+	}
+
+	if got := Settings(documentDefaults()); got.TransientRetries != nil || got.Backends != nil {
+		t.Fatalf("default nullable values changed: %+v", got)
+	}
+}
+
+func TestLoadDiscoveryErrorQuotesPath(t *testing.T) {
+	dir := t.TempDir()
+	loop := filepath.Join(dir, "loop-\n.yml")
+	if err := os.Symlink(loop, loop); err != nil {
+		t.Skipf("symlink unavailable: %v", err)
+	}
+	useConfigSearchPaths(t, loop)
+	_, err := Load(LoadOptions{})
+	if err == nil || !strings.Contains(err.Error(), `\n`) || strings.Contains(err.Error(), "loop-\n.yml") {
+		t.Fatalf("discovery error did not quote path safely: %v", err)
+	}
+}
+
+func TestLoadComposesExplicitImportsAndSelectedOverlay(t *testing.T) {
+	dir := t.TempDir()
+	if err := os.MkdirAll(filepath.Join(dir, "fragments"), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.MkdirAll(filepath.Join(dir, "overlays"), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	base := filepath.Join(dir, "config.yml")
+	writeApplicationFile(t, base, "configkit:\n  imports:\n    - glob: fragments/*.yml\nprompt_dir: ./base-prompts\nserver:\n  addr: :8081\n")
+	writeApplicationFile(t, filepath.Join(dir, "fragments", "a.yml"), "backends:\n  alpha:\n    endpoint: http://alpha.invalid/v1\n")
+	writeApplicationFile(t, filepath.Join(dir, "fragments", "b.yml"), "backends:\n  beta:\n    endpoint: http://beta.invalid/v1\n")
+	writeApplicationFile(t, filepath.Join(dir, "overlays", "local.yml"), "prompt_dir: ./overlay-prompts\nserver:\n  addr: :9090\n")
+
+	result, err := Load(LoadOptions{Path: base, Explicit: true})
+	if err != nil || result.Config.PromptDir != "base-prompts" || len(result.Config.Backends) != 2 || len(result.Sources()) != 3 {
+		t.Fatalf("disjoint imports did not compose: result=%+v err=%v", result, err)
+	}
+	result, err = Load(LoadOptions{Path: base, Explicit: true, Overlay: "local", Overrides: []configkit.Override{{
+		Path: configkit.Keys("server", "addr"), Value: ":7070", Flag: "--addr",
+	}}})
+	if err != nil || result.Config.PromptDir != "overlay-prompts" || result.Config.Server.Addr != ":7070" || len(result.Sources()) != 5 {
+		t.Fatalf("overlay or explicit override changed: result=%+v err=%v", result, err)
+	}
+	if _, err := Load(LoadOptions{Path: base, Explicit: true, Overlay: "missing"}); err == nil {
+		t.Fatal("missing selected overlay accepted")
+	}
+	writeApplicationFile(t, filepath.Join(dir, "fragments", "b.yml"), "backends:\n  alpha:\n    endpoint: http://conflict.invalid/v1\n")
+	if _, err := Load(LoadOptions{Path: base, Explicit: true}); err == nil {
+		t.Fatal("conflicting import accepted")
+	} else {
+		var loadError *configkit.LoadError
+		if !errors.As(err, &loadError) {
+			t.Fatalf("conflict lost structured diagnostic: %v", err)
+		}
+	}
+}
+
+func TestLoadRejectsOverlayWithoutBase(t *testing.T) {
+	useConfigSearchPaths(t, filepath.Join(t.TempDir(), "absent.yml"))
+	if _, err := Load(LoadOptions{Overlay: "local"}); err == nil {
+		t.Fatal("overlay without base accepted")
+	} else {
+		var loadError *configkit.LoadError
+		if !errors.As(err, &loadError) {
+			t.Fatalf("no-base overlay lost structured diagnostic: %v", err)
+		}
+	}
+	if _, err := Load(LoadOptions{Overlay: "default"}); err != nil {
+		t.Fatalf("default must select no overlay: %v", err)
+	}
+}

internal/config/settings.go

@@ -0,0 +1,37 @@
+package config
+
+import renderformat "gitea.maximumdirect.net/eric/scriptorium/internal/format"
+
+const (
+	DefaultConfigPath      = "/etc/scriptorium/config.yml"
+	DefaultConfigPathLocal = "/usr/local/etc/scriptorium/config.yml"
+)
+
+var defaultConfigSearchPaths = []string{
+	DefaultConfigPathLocal,
+	DefaultConfigPath,
+}
+
+// AppSettings holds the validated application values used by executable adapters.
+type AppSettings struct {
+	PromptDir           string
+	ProfileDir          string
+	SchemaDir           string
+	ServerAddr          string
+	ArtifactRoot        string
+	MaxRequestBytes     int64
+	MaxArtifactBytes    int64
+	MaxResponseBytes    int64
+	DefaultRenderFormat renderformat.PreparedRunOutputFormat
+	Backends            []BackendSettings
+	TransientRetries    *int
+}
+
+type BackendSettings struct {
+	ID               string
+	Endpoint         string
+	APIKeyEnv        string
+	ExtraParams      map[string]any
+	ConcurrencyLimit int
+	QueueCapacity    *int
+}

internal/defaults/defaults.go

@@ -1,39 +1,13 @@
 package defaults
 
-import (
+import "time"
-	"time"
-
-	"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
-)
 
 const (
 	HTTPAddrDefault             = ":8080"
 	SchemaDirDefault            = "."
-	OutputArtifactName          = "output"
-	ContentTypeTextPlain        = "text/plain"
-	ContentTypeTextMarkdown     = "text/markdown"
-	ContentTypeApplicationJSON  = "application/json"
-	OpenAIChatCompletionsPath   = "/chat/completions"
 	HTTPMaxRequestBytesDefault  = 16 * 1024 * 1024
 	HTTPMaxArtifactBytesDefault = 16 * 1024 * 1024
 	HTTPMaxResponseBytesDefault = 16 * 1024 * 1024
-
-	ExecutionDefaultTemperature    = 0.0
-	ExecutionDefaultMaxTokens      = 0
-	ExecutionDefaultTopP           = 1.0
-	ExecutionDefaultTimeoutSeconds = 600
 )
 
-var (
+var HTTPReadHeaderTimeoutDefault = 10 * time.Second
-	LLMRequestTimeoutDefault     = 10 * time.Minute
-	HTTPReadHeaderTimeoutDefault = 10 * time.Second
-)
-
-func ExecutionTargetDefault() domain.ExecutionTarget {
-	return domain.ExecutionTarget{
-		Temperature:    ExecutionDefaultTemperature,
-		MaxTokens:      ExecutionDefaultMaxTokens,
-		TopP:           ExecutionDefaultTopP,
-		TimeoutSeconds: ExecutionDefaultTimeoutSeconds,
-	}
-}

internal/domain/domain.go

@@ -1,288 +0,0 @@
-package domain
-
-import (
-	"time"
-)
-
-// ArtifactRefType defines how an artifact is referenced.
-type ArtifactRefType string
-
-const (
-	ArtifactRefInline ArtifactRefType = "inline"
-	ArtifactRefFile   ArtifactRefType = "file"
-)
-
-// OutputFormat defines the desired format of the generated artifact.
-type OutputFormat string
-
-const (
-	FormatText     OutputFormat = "text"
-	FormatMarkdown OutputFormat = "markdown"
-	FormatJSON     OutputFormat = "json"
-)
-
-// ValidationMode defines how the output should be validated.
-type ValidationMode string
-
-const (
-	ValidationNone       ValidationMode = "none"
-	ValidationBasic      ValidationMode = "basic"
-	ValidationJSON       ValidationMode = "json"
-	ValidationJSONSchema ValidationMode = "json_schema"
-)
-
-// ValidationStatus defines the result of a validation check.
-type ValidationStatus string
-
-const (
-	ValidationPassed  ValidationStatus = "passed"
-	ValidationFailed  ValidationStatus = "failed"
-	ValidationSkipped ValidationStatus = "skipped"
-)
-
-// CacheControlType defines provider cache behavior for prompt content.
-type CacheControlType string
-
-const (
-	CacheControlEphemeral CacheControlType = "ephemeral"
-)
-
-const (
-	// SessionIDMaxLength is OpenRouter's documented maximum session_id length.
-	SessionIDMaxLength = 256
-)
-
-// CacheControl describes provider cache metadata attached to prompt content.
-type CacheControl struct {
-	Type CacheControlType `yaml:"type" json:"type"`
-	TTL  string           `yaml:"ttl,omitempty" json:"ttl,omitempty"`
-}
-
-// RunRequest represents a request to generate a single artifact.
-type RunRequest struct {
-	PromptID      string
-	PromptVersion string
-	ProfileID     string
-	APIKey        string `json:"-" yaml:"-"`
-	Inputs        map[string]ArtifactRef
-	Vars          map[string]string
-	Execution     *ExecutionTargetOverride
-	Validation    *OutputContract
-	Metadata      map[string]string
-}
-
-// RunResult represents the complete result of a prompt execution run.
-type RunResult struct {
-	RunID                string
-	Artifact             Artifact
-	RawOutput            string
-	Validation           ValidationResult
-	PromptID             string
-	PromptVersion        string
-	PromptHash           string
-	RenderedPromptHash   string
-	SelectedProfileID    string
-	ModelName            string
-	Endpoint             string
-	EffectiveModelParams ExecutionTarget
-	InputHashes          map[string]string
-	Usage                TokenUsage
-	StartTime            time.Time
-	EndTime              time.Time
-	Duration             time.Duration
-}
-
-// PreparedRun contains pre-LLM execution state from the prepare/render phase.
-// It must never include resolved API key values, model output, or validation data.
-type PreparedRun struct {
-	PromptID             string                  `json:"prompt_id"`
-	PromptVersion        string                  `json:"prompt_version,omitempty"`
-	PromptHash           string                  `json:"prompt_hash,omitempty"`
-	SelectedProfileID    string                  `json:"selected_profile_id"`
-	EffectiveModelParams ExecutionTarget         `json:"effective_model_params"`
-	TargetPresence       ExecutionTargetPresence `json:"-"`
-	OutputContract       OutputContract          `json:"output_contract"`
-	StructuredOutput     *StructuredOutputSpec   `json:"structured_output,omitempty"`
-	InputHashes          map[string]string       `json:"input_hashes,omitempty"`
-	SessionID            string                  `json:"session_id,omitempty"`
-	RenderedPromptHash   string                  `json:"rendered_prompt_hash"`
-	Messages             []RenderedMessage       `json:"messages"`
-	StartTime            time.Time               `json:"start_time,omitempty"`
-	EndTime              time.Time               `json:"end_time,omitempty"`
-	DurationMS           int64                   `json:"duration_ms,omitempty"`
-}
-
-// ArtifactRef represents a reference to an input artifact.
-type ArtifactRef struct {
-	Type ArtifactRefType
-	URI  string
-	Body string // Used for inline
-}
-
-// Artifact represents the actual loaded content of a reference.
-type Artifact struct {
-	Name        string
-	ContentType string
-	Body        []byte
-	URI         string
-	Size        int64
-	Hash        string
-}
-
-// PromptDefinition represents a configured prompt execution definition.
-type PromptDefinition struct {
-	ID             string                  `yaml:"id"`
-	Version        string                  `yaml:"version"`
-	DefaultProfile string                  `yaml:"default_profile"`
-	Description    string                  `yaml:"description"`
-	SessionID      string                  `yaml:"session_id" json:"session_id,omitempty"`
-	Inputs         []PromptInput           `yaml:"inputs"`
-	Templates      []PromptMessageTemplate `yaml:"templates"`
-	OutputFormat   OutputFormat            `yaml:"output_format"`
-	Validation     OutputContract          `yaml:"validation"`
-}
-
-// PromptInput describes one named input expected by a prompt definition.
-type PromptInput struct {
-	Name        string `yaml:"name"`
-	Required    bool   `yaml:"required"`
-	ContentType string `yaml:"content_type"`
-	Description string `yaml:"description"`
-}
-
-// PromptMessageTemplate defines a template for a chat message.
-type PromptMessageTemplate struct {
-	Role         string        `yaml:"role"`
-	Content      string        `yaml:"content"`
-	ContentFile  string        `yaml:"content_file"`
-	CacheControl *CacheControl `yaml:"cache_control,omitempty" json:"cache_control,omitempty"`
-}
-
-// ExecutionProfile describes how and where to execute a model.
-type ExecutionProfile struct {
-	ID              string         `yaml:"id"`
-	Endpoint        string         `yaml:"endpoint"`
-	Model           string         `yaml:"model"`
-	Temperature     float64        `yaml:"temperature"`
-	MaxTokens       int            `yaml:"max_tokens"`
-	TopP            float64        `yaml:"top_p"`
-	TimeoutSeconds  int            `yaml:"timeout_seconds"`
-	ServiceTier     string         `yaml:"service_tier"`
-	ReasoningEffort string         `yaml:"reasoning_effort"`
-	APIKeyEnv       string         `yaml:"api_key_env"`
-	APIKeyRequired  bool           `yaml:"-" json:"-"`
-	ExtraParams     map[string]any `yaml:"extra_params"`
-}
-
-// ExecutionTargetOverride represents per-request runtime setting overrides.
-type ExecutionTargetOverride struct {
-	Endpoint        string         `json:"endpoint,omitempty"`
-	Model           string         `json:"model,omitempty"`
-	Temperature     *float64       `json:"temperature,omitempty"`
-	MaxTokens       *int           `json:"max_tokens,omitempty"`
-	TopP            *float64       `json:"top_p,omitempty"`
-	TimeoutSeconds  *int           `json:"timeout_seconds,omitempty"`
-	ServiceTier     string         `json:"service_tier,omitempty"`
-	ReasoningEffort string         `json:"reasoning_effort,omitempty"`
-	APIKeyEnv       string         `json:"api_key_env,omitempty"`
-	ExtraParams     map[string]any `json:"extra_params,omitempty"`
-}
-
-// ExecutionTargetPresence tracks which effective runtime fields came from an
-// explicit request override even when the resolved value is a zero value.
-type ExecutionTargetPresence struct {
-	Temperature    bool
-	MaxTokens      bool
-	TopP           bool
-	TimeoutSeconds bool
-}
-
-// ExecutionTarget represents effective model runtime settings for a run.
-type ExecutionTarget struct {
-	Endpoint        string         `yaml:"endpoint" json:"endpoint"`
-	Model           string         `yaml:"model" json:"model"`
-	Temperature     float64        `yaml:"temperature" json:"temperature"`
-	MaxTokens       int            `yaml:"max_tokens" json:"max_tokens"`
-	TopP            float64        `yaml:"top_p" json:"top_p"`
-	TimeoutSeconds  int            `yaml:"timeout_seconds" json:"timeout_seconds"`
-	ServiceTier     string         `yaml:"service_tier" json:"service_tier"`
-	ReasoningEffort string         `yaml:"reasoning_effort" json:"reasoning_effort"`
-	APIKeyEnv       string         `yaml:"api_key_env" json:"api_key_env"`
-	APIKey          string         `yaml:"-" json:"-"`
-	APIKeyRequired  bool           `yaml:"-" json:"-"`
-	ExtraParams     map[string]any `yaml:"extra_params" json:"extra_params"`
-}
-
-// OutputContract defines the requirements for the output artifact.
-type OutputContract struct {
-	Format         OutputFormat   `yaml:"format"`
-	ValidationMode ValidationMode `yaml:"validation_mode"`
-	SchemaPath     string         `yaml:"schema_path"`
-	RepairAttempts int            `yaml:"repair_attempts"`
-}
-
-// RenderedPrompt represents the prompt after template application.
-type RenderedPrompt struct {
-	SessionID string            `json:"session_id,omitempty"`
-	Messages  []RenderedMessage `json:"messages"`
-}
-
-// RenderedMessage is a single message in a rendered prompt.
-type RenderedMessage struct {
-	Role         string        `json:"role"`
-	Content      string        `json:"content"`
-	CacheControl *CacheControl `json:"cache_control,omitempty"`
-}
-
-// GenerateRequest is the internal request passed to the LLM client.
-type GenerateRequest struct {
-	Prompt           RenderedPrompt
-	Target           ExecutionTarget
-	TargetPresence   ExecutionTargetPresence
-	StructuredOutput *StructuredOutputSpec
-}
-
-// StructuredOutputType indicates which provider-level output mode is requested.
-type StructuredOutputType string
-
-const (
-	StructuredOutputJSONSchema StructuredOutputType = "json_schema"
-)
-
-// StructuredOutputSpec describes provider-level structured output requirements.
-type StructuredOutputSpec struct {
-	Type       StructuredOutputType      `json:"type"`
-	JSONSchema *StructuredOutputJSONSpec `json:"json_schema,omitempty"`
-}
-
-// StructuredOutputJSONSpec contains json_schema output constraints.
-type StructuredOutputJSONSpec struct {
-	Name   string `json:"name"`
-	Strict bool   `json:"strict"`
-	Schema any    `json:"schema"`
-}
-
-// GenerateResponse is the response received from the LLM client.
-type GenerateResponse struct {
-	Content string
-	Usage   TokenUsage
-}
-
-// TokenUsage tracks token consumption.
-type TokenUsage struct {
-	PromptTokens     int
-	CompletionTokens int
-	TotalTokens      int
-	CachedTokens     int
-	CacheWriteTokens int
-}
-
-// ValidationResult represents the outcome of an output validation.
-type ValidationResult struct {
-	Status         ValidationStatus
-	Mode           ValidationMode
-	Errors         []string
-	SchemaPath     string
-	RepairAttempts int
-	IsValid        bool
-}

internal/domain/prepared_run_test.go

@@ -1,141 +0,0 @@
-package domain
-
-import (
-	"encoding/json"
-	"strings"
-	"testing"
-)
-
-func TestPreparedRunJSONDoesNotIncludeSecretValues(t *testing.T) {
-	const envName = "SCRIPTORIUM_TEST_API_KEY"
-	const secret = "super-secret-value"
-	t.Setenv(envName, secret)
-
-	prepared := PreparedRun{
-		PromptID:          "prompt.id",
-		PromptVersion:     "v1",
-		PromptHash:        "prompt-hash",
-		SelectedProfileID: "local-fast",
-		EffectiveModelParams: ExecutionTarget{
-			Endpoint:  "http://llm/v1",
-			Model:     "gpt-test",
-			APIKeyEnv: envName,
-			APIKey:    secret,
-		},
-		InputHashes:        map[string]string{"transcript": "hash-1"},
-		RenderedPromptHash: "rendered-hash",
-		Messages: []RenderedMessage{
-			{Role: "system", Content: "You are helpful."},
-			{Role: "user", Content: "Summarize this."},
-		},
-	}
-
-	b, err := json.Marshal(prepared)
-	if err != nil {
-		t.Fatalf("marshal failed: %v", err)
-	}
-
-	out := string(b)
-	if strings.Contains(out, secret) {
-		t.Fatalf("prepared run JSON unexpectedly contains secret value: %s", out)
-	}
-	if !strings.Contains(out, `"api_key_env":"`+envName+`"`) {
-		t.Fatalf("prepared run JSON should include api_key_env name: %s", out)
-	}
-
-	var top map[string]any
-	if err := json.Unmarshal(b, &top); err != nil {
-		t.Fatalf("unmarshal failed: %v", err)
-	}
-
-	for _, forbidden := range []string{"raw_output", "validation", "artifact"} {
-		if _, ok := top[forbidden]; ok {
-			t.Fatalf("prepared run JSON should not include %q", forbidden)
-		}
-	}
-}
-
-func TestPreparedRunJSONIncludesMessageCacheControlOnlyWhenPresent(t *testing.T) {
-	prepared := PreparedRun{
-		PromptID:          "prompt.id",
-		SelectedProfileID: "local-fast",
-		EffectiveModelParams: ExecutionTarget{
-			Endpoint: "http://llm/v1",
-			Model:    "gpt-test",
-		},
-		RenderedPromptHash: "rendered-hash",
-		Messages: []RenderedMessage{
-			{
-				Role:    "system",
-				Content: "You are helpful.",
-				CacheControl: &CacheControl{
-					Type: CacheControlEphemeral,
-					TTL:  "1h",
-				},
-			},
-			{Role: "user", Content: "Summarize this."},
-		},
-	}
-
-	b, err := json.Marshal(prepared)
-	if err != nil {
-		t.Fatalf("marshal failed: %v", err)
-	}
-
-	var decoded struct {
-		Messages []map[string]any `json:"messages"`
-	}
-	if err := json.Unmarshal(b, &decoded); err != nil {
-		t.Fatalf("unmarshal failed: %v", err)
-	}
-	if len(decoded.Messages) != 2 {
-		t.Fatalf("expected 2 messages, got %d", len(decoded.Messages))
-	}
-
-	cacheControl, ok := decoded.Messages[0]["cache_control"].(map[string]any)
-	if !ok {
-		t.Fatalf("expected cache_control on first message, got %#v", decoded.Messages[0])
-	}
-	if cacheControl["type"] != string(CacheControlEphemeral) || cacheControl["ttl"] != "1h" {
-		t.Fatalf("unexpected cache_control payload: %#v", cacheControl)
-	}
-	if _, ok := decoded.Messages[1]["cache_control"]; ok {
-		t.Fatalf("expected second message to omit cache_control, got %#v", decoded.Messages[1])
-	}
-}
-
-func TestPreparedRunJSONIncludesSessionIDOnlyWhenPresent(t *testing.T) {
-	prepared := PreparedRun{
-		PromptID:          "prompt.id",
-		SelectedProfileID: "local-fast",
-		EffectiveModelParams: ExecutionTarget{
-			Endpoint: "http://llm/v1",
-			Model:    "gpt-test",
-		},
-		SessionID:          "session-123",
-		RenderedPromptHash: "rendered-hash",
-		Messages:           []RenderedMessage{{Role: "user", Content: "Summarize this."}},
-	}
-
-	b, err := json.Marshal(prepared)
-	if err != nil {
-		t.Fatalf("marshal failed: %v", err)
-	}
-
-	var decoded map[string]any
-	if err := json.Unmarshal(b, &decoded); err != nil {
-		t.Fatalf("unmarshal failed: %v", err)
-	}
-	if decoded["session_id"] != "session-123" {
-		t.Fatalf("expected session_id in prepared run JSON, got %#v", decoded["session_id"])
-	}
-
-	prepared.SessionID = ""
-	b, err = json.Marshal(prepared)
-	if err != nil {
-		t.Fatalf("marshal failed: %v", err)
-	}
-	if strings.Contains(string(b), "session_id") {
-		t.Fatalf("expected empty session_id to be omitted, got %s", b)
-	}
-}

internal/filecatalog/catalog.go

@@ -1,142 +0,0 @@
-package filecatalog
-
-import (
-	"context"
-	"fmt"
-	"io/fs"
-	"os"
-	"path"
-	"path/filepath"
-	"sort"
-	"strings"
-)
-
-// FindYAMLFiles returns sorted full paths for .yaml and .yml files under root.
-func FindYAMLFiles(ctx context.Context, root string) ([]string, error) {
-	var files []string
-	err := filepath.WalkDir(root, func(path string, d os.DirEntry, err error) error {
-		if err != nil {
-			return err
-		}
-		select {
-		case <-ctx.Done():
-			return ctx.Err()
-		default:
-		}
-		if d.IsDir() {
-			return nil
-		}
-		if !IsYAMLFile(d.Name()) {
-			return nil
-		}
-		files = append(files, path)
-		return nil
-	})
-	sort.Strings(files)
-	return files, err
-}
-
-// FindFSYAMLFiles returns sorted paths for .yaml and .yml files under root in fsys.
-func FindFSYAMLFiles(ctx context.Context, fsys fs.FS, root string) ([]string, error) {
-	cleanRoot := CleanFSRoot(root)
-	var files []string
-	err := fs.WalkDir(fsys, cleanRoot, func(name string, d fs.DirEntry, err error) error {
-		if err != nil {
-			return err
-		}
-		select {
-		case <-ctx.Done():
-			return ctx.Err()
-		default:
-		}
-		if d.IsDir() {
-			return nil
-		}
-		if !IsYAMLFile(d.Name()) {
-			return nil
-		}
-		files = append(files, name)
-		return nil
-	})
-	sort.Strings(files)
-	return files, err
-}
-
-// RelativePath computes a clean relative path from root to path.
-func RelativePath(root string, filePath string) string {
-	rel, err := filepath.Rel(root, filePath)
-	if err != nil {
-		return filepath.Clean(filePath)
-	}
-	return filepath.Clean(rel)
-}
-
-// CleanFSRoot normalizes a root path for use with fs.FS.
-func CleanFSRoot(root string) string {
-	root = strings.TrimSpace(root)
-	if root == "" || root == "." {
-		return "."
-	}
-	return path.Clean(root)
-}
-
-// DisplayPath returns name relative to root for messages about fs.FS paths.
-func DisplayPath(root string, name string) string {
-	cleanRoot := CleanFSRoot(root)
-	cleanName := path.Clean(name)
-	if cleanRoot == "." {
-		return cleanName
-	}
-	prefix := strings.TrimSuffix(cleanRoot, "/") + "/"
-	if strings.HasPrefix(cleanName, prefix) {
-		return strings.TrimPrefix(cleanName, prefix)
-	}
-	return cleanName
-}
-
-// ResolveFSPath resolves userPath from baseDir and keeps it inside root.
-func ResolveFSPath(root string, baseDir string, userPath string) (string, string, error) {
-	cleanRoot := CleanFSRoot(root)
-	cleanBase := path.Clean(strings.TrimSpace(baseDir))
-	if cleanBase == "" {
-		cleanBase = cleanRoot
-	}
-	if !containsFSPath(cleanRoot, cleanBase) {
-		return "", "", fmt.Errorf("base path %q is outside source root %q", cleanBase, cleanRoot)
-	}
-
-	cleanUserPath := strings.TrimSpace(userPath)
-	if cleanUserPath == "" {
-		return "", "", fmt.Errorf("path is required")
-	}
-	cleanUserPath = path.Clean(cleanUserPath)
-	if path.IsAbs(cleanUserPath) {
-		return "", "", fmt.Errorf("path %q must be relative", userPath)
-	}
-
-	resolved := path.Clean(path.Join(cleanBase, cleanUserPath))
-	if !containsFSPath(cleanRoot, resolved) {
-		return "", "", fmt.Errorf("path %q escapes source root %q", userPath, cleanRoot)
-	}
-	return resolved, DisplayPath(cleanRoot, resolved), nil
-}
-
-func containsFSPath(root string, name string) bool {
-	root = CleanFSRoot(root)
-	name = path.Clean(name)
-	if root == "." {
-		return name == "." || (name != ".." && !strings.HasPrefix(name, "../"))
-	}
-	return name == root || strings.HasPrefix(name, strings.TrimSuffix(root, "/")+"/")
-}
-
-// Stem strips .yaml or .yml from a file name.
-func Stem(name string) string {
-	name = strings.TrimSuffix(name, ".yaml")
-	name = strings.TrimSuffix(name, ".yml")
-	return name
-}
-
-func IsYAMLFile(name string) bool {
-	return strings.HasSuffix(name, ".yaml") || strings.HasSuffix(name, ".yml")
-}

internal/filecatalog/catalog_test.go

@@ -1,270 +0,0 @@
-package filecatalog
-
-import (
-	"context"
-	"errors"
-	"os"
-	"path/filepath"
-	"reflect"
-	"strings"
-	"testing"
-	"testing/fstest"
-)
-
-func TestFindYAMLFilesNestedSortedAndFiltered(t *testing.T) {
-	root := t.TempDir()
-	mustWriteFile(t, filepath.Join(root, "z", "prompt.yml"), "id: z")
-	mustWriteFile(t, filepath.Join(root, "a", "profile.yaml"), "id: a")
-	mustWriteFile(t, filepath.Join(root, "a", "ignore.txt"), "not yaml")
-	mustWriteFile(t, filepath.Join(root, "b", "ignore.yaml.bak"), "not yaml")
-
-	got, err := FindYAMLFiles(context.Background(), root)
-	if err != nil {
-		t.Fatalf("expected no error, got %v", err)
-	}
-
-	want := []string{
-		filepath.Join(root, "a", "profile.yaml"),
-		filepath.Join(root, "z", "prompt.yml"),
-	}
-	if !reflect.DeepEqual(got, want) {
-		t.Fatalf("expected sorted YAML files %v, got %v", want, got)
-	}
-}
-
-func TestFindYAMLFilesHonorsContextCancellation(t *testing.T) {
-	root := t.TempDir()
-	mustWriteFile(t, filepath.Join(root, "one.yaml"), "id: one")
-
-	ctx, cancel := context.WithCancel(context.Background())
-	cancel()
-
-	_, err := FindYAMLFiles(ctx, root)
-	if !errors.Is(err, context.Canceled) {
-		t.Fatalf("expected context.Canceled, got %v", err)
-	}
-}
-
-func TestFindFSYAMLFilesNestedSortedAndFiltered(t *testing.T) {
-	fsys := fstest.MapFS{
-		"prompts/z/prompt.yml":      &fstest.MapFile{Data: []byte("id: z")},
-		"prompts/a/profile.yaml":    &fstest.MapFile{Data: []byte("id: a")},
-		"prompts/a/ignore.txt":      &fstest.MapFile{Data: []byte("not yaml")},
-		"prompts/b/ignore.yaml.bak": &fstest.MapFile{Data: []byte("not yaml")},
-		"other/ignored.yaml":        &fstest.MapFile{Data: []byte("id: ignored")},
-	}
-
-	got, err := FindFSYAMLFiles(context.Background(), fsys, " prompts ")
-	if err != nil {
-		t.Fatalf("expected no error, got %v", err)
-	}
-
-	want := []string{
-		"prompts/a/profile.yaml",
-		"prompts/z/prompt.yml",
-	}
-	if !reflect.DeepEqual(got, want) {
-		t.Fatalf("expected sorted YAML files %v, got %v", want, got)
-	}
-}
-
-func TestFindFSYAMLFilesHonorsContextCancellation(t *testing.T) {
-	fsys := fstest.MapFS{
-		"one.yaml": &fstest.MapFile{Data: []byte("id: one")},
-	}
-	ctx, cancel := context.WithCancel(context.Background())
-	cancel()
-
-	_, err := FindFSYAMLFiles(ctx, fsys, ".")
-	if !errors.Is(err, context.Canceled) {
-		t.Fatalf("expected context.Canceled, got %v", err)
-	}
-}
-
-func TestRelativePathNested(t *testing.T) {
-	root := t.TempDir()
-	path := filepath.Join(root, "nested", "profiles", "local.yaml")
-	got := RelativePath(root, path)
-	want := filepath.Join("nested", "profiles", "local.yaml")
-	if got != want {
-		t.Fatalf("expected relative path %q, got %q", want, got)
-	}
-}
-
-func TestCleanFSRoot(t *testing.T) {
-	tests := []struct {
-		name string
-		root string
-		want string
-	}{
-		{name: "empty", root: "", want: "."},
-		{name: "dot", root: ".", want: "."},
-		{name: "trimmed", root: " prompts/../profiles ", want: "profiles"},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			if got := CleanFSRoot(tc.root); got != tc.want {
-				t.Fatalf("expected %q, got %q", tc.want, got)
-			}
-		})
-	}
-}
-
-func TestDisplayPath(t *testing.T) {
-	tests := []struct {
-		name string
-		root string
-		path string
-		want string
-	}{
-		{name: "root dot", root: ".", path: "profiles/local.yaml", want: "profiles/local.yaml"},
-		{name: "nested root", root: "profiles", path: "profiles/local.yaml", want: "local.yaml"},
-		{name: "outside root", root: "profiles", path: "other/local.yaml", want: "other/local.yaml"},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			if got := DisplayPath(tc.root, tc.path); got != tc.want {
-				t.Fatalf("expected %q, got %q", tc.want, got)
-			}
-		})
-	}
-}
-
-func TestResolveFSPath(t *testing.T) {
-	tests := []struct {
-		name        string
-		root        string
-		baseDir     string
-		userPath    string
-		wantPath    string
-		wantDisplay string
-		wantErr     string
-	}{
-		{
-			name:        "sibling inside root",
-			root:        "prompts",
-			baseDir:     "prompts/nested",
-			userPath:    "./messages/user.tmpl",
-			wantPath:    "prompts/nested/messages/user.tmpl",
-			wantDisplay: "nested/messages/user.tmpl",
-		},
-		{
-			name:        "parent inside root",
-			root:        "prompts",
-			baseDir:     "prompts/nested",
-			userPath:    "../shared/user.tmpl",
-			wantPath:    "prompts/shared/user.tmpl",
-			wantDisplay: "shared/user.tmpl",
-		},
-		{
-			name:     "escape rejected",
-			root:     "prompts",
-			baseDir:  "prompts/nested",
-			userPath: "../../outside.tmpl",
-			wantErr:  "escapes source root",
-		},
-		{
-			name:     "absolute path rejected",
-			root:     "prompts",
-			baseDir:  "prompts/nested",
-			userPath: "/outside.tmpl",
-			wantErr:  "must be relative",
-		},
-		{
-			name:     "empty path rejected",
-			root:     "prompts",
-			baseDir:  "prompts/nested",
-			userPath: " ",
-			wantErr:  "path is required",
-		},
-		{
-			name:        "dot root allows normal relative path",
-			root:        ".",
-			baseDir:     ".",
-			userPath:    "schemas/events.schema.json",
-			wantPath:    "schemas/events.schema.json",
-			wantDisplay: "schemas/events.schema.json",
-		},
-		{
-			name:     "dot root rejects parent escape",
-			root:     ".",
-			baseDir:  ".",
-			userPath: "../outside.tmpl",
-			wantErr:  "escapes source root",
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			gotPath, gotDisplay, err := ResolveFSPath(tc.root, tc.baseDir, tc.userPath)
-			if tc.wantErr != "" {
-				if err == nil {
-					t.Fatalf("expected error containing %q", tc.wantErr)
-				}
-				if !strings.Contains(err.Error(), tc.wantErr) {
-					t.Fatalf("expected error to contain %q, got %v", tc.wantErr, err)
-				}
-				return
-			}
-			if err != nil {
-				t.Fatalf("expected no error, got %v", err)
-			}
-			if gotPath != tc.wantPath || gotDisplay != tc.wantDisplay {
-				t.Fatalf("expected path/display %q/%q, got %q/%q", tc.wantPath, tc.wantDisplay, gotPath, gotDisplay)
-			}
-		})
-	}
-}
-
-func TestStemStripsYAMLExtensions(t *testing.T) {
-	tests := []struct {
-		name string
-		in   string
-		want string
-	}{
-		{name: "yaml", in: "prompt.yaml", want: "prompt"},
-		{name: "yml", in: "profile.yml", want: "profile"},
-		{name: "other", in: "file.txt", want: "file.txt"},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			if got := Stem(tc.in); got != tc.want {
-				t.Fatalf("expected %q, got %q", tc.want, got)
-			}
-		})
-	}
-}
-
-func TestIsYAMLFile(t *testing.T) {
-	tests := []struct {
-		name string
-		in   string
-		want bool
-	}{
-		{name: "yaml", in: "prompt.yaml", want: true},
-		{name: "yml", in: "profile.yml", want: true},
-		{name: "backup", in: "profile.yaml.bak", want: false},
-		{name: "uppercase", in: "profile.YAML", want: false},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			if got := IsYAMLFile(tc.in); got != tc.want {
-				t.Fatalf("expected %v, got %v", tc.want, got)
-			}
-		})
-	}
-}
-
-func mustWriteFile(t *testing.T, path string, content string) {
-	t.Helper()
-	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
-		t.Fatalf("failed to create directory: %v", err)
-	}
-	if err := os.WriteFile(path, []byte(content), 0o644); err != nil {
-		t.Fatalf("failed to write file %q: %v", path, err)
-	}
-}

internal/format/inspection.go

@@ -0,0 +1,122 @@
+package format
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strconv"
+
+	"gitea.maximumdirect.net/eric/promptkit"
+)
+
+type PromptInspection struct {
+	PromptID         string                  `json:"prompt_id"`
+	PromptVersion    string                  `json:"prompt_version"`
+	PromptHash       string                  `json:"prompt_hash"`
+	DefaultProfileID string                  `json:"default_profile_id"`
+	Inputs           []PromptInspectionInput `json:"inputs"`
+	OutputContract   OutputContract          `json:"output_contract"`
+}
+
+type PromptInspectionInput struct {
+	Name        string `json:"name"`
+	Required    bool   `json:"required"`
+	ContentType string `json:"content_type"`
+	Description string `json:"description"`
+}
+
+type OutputContract struct {
+	Format         string `json:"format"`
+	ValidationMode string `json:"validation_mode"`
+	SchemaPath     string `json:"schema_path"`
+	RepairAttempts int    `json:"repair_attempts"`
+}
+
+type ProfileInspection struct {
+	ProfileID            string             `json:"profile_id"`
+	EffectiveModelParams ProfileModelParams `json:"effective_model_params"`
+	APIKeyRequired       bool               `json:"api_key_required"`
+}
+
+type ProfileModelParams struct {
+	BackendID       string         `json:"backend_id"`
+	Endpoint        string         `json:"endpoint"`
+	Model           string         `json:"model"`
+	Temperature     float64        `json:"temperature"`
+	MaxTokens       int            `json:"max_tokens"`
+	TopP            float64        `json:"top_p"`
+	TimeoutSeconds  int            `json:"timeout_seconds"`
+	ServiceTier     string         `json:"service_tier"`
+	ReasoningEffort string         `json:"reasoning_effort"`
+	APIKeyEnv       string         `json:"api_key_env"`
+	ExtraParams     map[string]any `json:"extra_params"`
+}
+
+func FormatPromptInspection(value *promptkit.PromptInspection, outputFormat OutputFormat) ([]byte, error) {
+	if value == nil {
+		return nil, errors.New("prompt inspection is nil")
+	}
+	dto := PromptInspection{
+		PromptID: value.PromptID, PromptVersion: value.PromptVersion, PromptHash: value.PromptHash, DefaultProfileID: value.DefaultProfileID,
+		Inputs:         make([]PromptInspectionInput, len(value.Inputs)),
+		OutputContract: OutputContract{Format: string(value.OutputContract.Format), ValidationMode: string(value.OutputContract.ValidationMode), SchemaPath: value.OutputContract.SchemaPath, RepairAttempts: value.OutputContract.RepairAttempts},
+	}
+	for i, input := range value.Inputs {
+		dto.Inputs[i] = PromptInspectionInput{Name: input.Name, Required: input.Required, ContentType: input.ContentType, Description: input.Description}
+	}
+	switch outputFormat {
+	case OutputFormatJSON:
+		data, err := json.MarshalIndent(dto, "", "  ")
+		if err != nil {
+			return nil, err
+		}
+		return append(data, '\n'), nil
+	case OutputFormatText:
+		var b bytes.Buffer
+		fmt.Fprintf(&b, "prompt_id: %s\nprompt_version: %s\nprompt_hash: %s\ndefault_profile_id: %s\ninputs:", dto.PromptID, dto.PromptVersion, dto.PromptHash, dto.DefaultProfileID)
+		if len(dto.Inputs) == 0 {
+			fmt.Fprintln(&b, " []")
+		} else {
+			fmt.Fprintln(&b)
+			for _, input := range dto.Inputs {
+				fmt.Fprintf(&b, "  - name: %s\n    required: %t\n    content_type: %s\n    description: %s\n", input.Name, input.Required, input.ContentType, strconv.Quote(input.Description))
+			}
+		}
+		fmt.Fprintf(&b, "output_contract:\n  format: %s\n  validation_mode: %s\n  schema_path: %s\n  repair_attempts: %d\n", dto.OutputContract.Format, dto.OutputContract.ValidationMode, dto.OutputContract.SchemaPath, dto.OutputContract.RepairAttempts)
+		return b.Bytes(), nil
+	default:
+		return nil, fmt.Errorf("%w: %q", ErrUnknownPreparedRunFormat, outputFormat)
+	}
+}
+
+func FormatProfileInspection(value *promptkit.ProfileInspection, outputFormat OutputFormat) ([]byte, error) {
+	if value == nil {
+		return nil, errors.New("profile inspection is nil")
+	}
+	target := value.EffectiveModelParams
+	params := map[string]any{}
+	for key, item := range target.ExtraParams {
+		params[key] = item
+	}
+	dto := ProfileInspection{ProfileID: value.ProfileID, APIKeyRequired: value.APIKeyRequired, EffectiveModelParams: ProfileModelParams{BackendID: target.BackendID, Endpoint: target.Endpoint, Model: target.Model, Temperature: target.Temperature, MaxTokens: target.MaxTokens, TopP: target.TopP, TimeoutSeconds: target.TimeoutSeconds, ServiceTier: target.ServiceTier, ReasoningEffort: target.ReasoningEffort, APIKeyEnv: target.APIKeyEnv, ExtraParams: params}}
+	switch outputFormat {
+	case OutputFormatJSON:
+		data, err := json.MarshalIndent(dto, "", "  ")
+		if err != nil {
+			return nil, err
+		}
+		return append(data, '\n'), nil
+	case OutputFormatText:
+		var b bytes.Buffer
+		fmt.Fprintf(&b, "profile_id: %s\neffective_model_params:\n  backend_id: %s\n  endpoint: %s\n  model: %s\n  temperature: %g\n  max_tokens: %d\n  top_p: %g\n  timeout_seconds: %d\n  service_tier: %s\n  reasoning_effort: %s\n  api_key_env: %s\n  extra_params: ", dto.ProfileID, dto.EffectiveModelParams.BackendID, dto.EffectiveModelParams.Endpoint, dto.EffectiveModelParams.Model, dto.EffectiveModelParams.Temperature, dto.EffectiveModelParams.MaxTokens, dto.EffectiveModelParams.TopP, dto.EffectiveModelParams.TimeoutSeconds, dto.EffectiveModelParams.ServiceTier, dto.EffectiveModelParams.ReasoningEffort, dto.EffectiveModelParams.APIKeyEnv)
+		paramsJSON, err := json.Marshal(dto.EffectiveModelParams.ExtraParams)
+		if err != nil {
+			return nil, err
+		}
+		fmt.Fprintf(&b, "%s\napi_key_required: %t\n", paramsJSON, dto.APIKeyRequired)
+		return b.Bytes(), nil
+	default:
+		return nil, fmt.Errorf("%w: %q", ErrUnknownPreparedRunFormat, outputFormat)
+	}
+}

internal/format/inspection_test.go

@@ -0,0 +1,124 @@
+package format
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/promptkit"
+)
+
+func TestFormatPromptInspectionPreservesDeclaredOrderAndEmptyValues(t *testing.T) {
+	value := &promptkit.PromptInspection{PromptID: "p", PromptVersion: "1", PromptHash: "hash", Inputs: []promptkit.PromptInputDefinition{{Name: "first", Required: true, ContentType: "text/plain", Description: "first input"}, {Name: "second"}}, OutputContract: promptkit.OutputContract{Format: "text", ValidationMode: promptkit.ValidationNone}}
+	text, err := FormatPromptInspection(value, OutputFormatText)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(string(text), "default_profile_id: \ninputs:\n  - name: first") || strings.Index(string(text), "name: first") > strings.Index(string(text), "name: second") {
+		t.Fatalf("unexpected text inspection: %s", text)
+	}
+	jsonOutput, err := FormatPromptInspection(value, OutputFormatJSON)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.HasSuffix(string(jsonOutput), "\n") || !strings.Contains(string(jsonOutput), `"default_profile_id": ""`) {
+		t.Fatalf("unexpected json inspection: %s", jsonOutput)
+	}
+}
+
+func TestFormatPromptInspectionRejectsNil(t *testing.T) {
+	if _, err := FormatPromptInspection(nil, OutputFormatText); err == nil {
+		t.Fatal("expected nil inspection error")
+	}
+}
+
+func TestFormatProfileInspectionPreservesSafeEffectiveValues(t *testing.T) {
+	const secret = "sentinel-secret-must-not-appear"
+	t.Setenv("FIXTURE_PROFILE_API_KEY", secret)
+
+	value := &promptkit.ProfileInspection{
+		ProfileID: "custom-derived",
+		EffectiveModelParams: promptkit.ExecutionTarget{
+			BackendID:       "fixture-custom",
+			Endpoint:        "http://127.0.0.1:11434/v1",
+			Model:           "fixture-model",
+			Temperature:     0.25,
+			MaxTokens:       640,
+			TopP:            0.9,
+			TimeoutSeconds:  45,
+			ServiceTier:     "flex",
+			ReasoningEffort: "high",
+			APIKeyEnv:       "FIXTURE_PROFILE_API_KEY",
+			ExtraParams: map[string]any{
+				"zeta":  true,
+				"alpha": map[string]any{"nested": []any{"first", 2.0}},
+			},
+		},
+		APIKeyRequired: true,
+	}
+
+	jsonOutput, err := FormatProfileInspection(value, OutputFormatJSON)
+	if err != nil {
+		t.Fatal(err)
+	}
+	secondJSONOutput, err := FormatProfileInspection(value, OutputFormatJSON)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if string(jsonOutput) != string(secondJSONOutput) || !strings.HasSuffix(string(jsonOutput), "\n") {
+		t.Fatalf("expected deterministic newline-terminated JSON, got %q", jsonOutput)
+	}
+	if strings.Contains(string(jsonOutput), secret) {
+		t.Fatalf("inspection exposed an environment secret: %s", jsonOutput)
+	}
+
+	var decoded ProfileInspection
+	if err := json.Unmarshal(jsonOutput, &decoded); err != nil {
+		t.Fatalf("decode profile inspection: %v", err)
+	}
+	if decoded.ProfileID != "custom-derived" || decoded.EffectiveModelParams.BackendID != "fixture-custom" {
+		t.Fatalf("unexpected profile identity: %+v", decoded)
+	}
+	if decoded.EffectiveModelParams.APIKeyEnv != "FIXTURE_PROFILE_API_KEY" || !decoded.APIKeyRequired {
+		t.Fatalf("unexpected credential metadata: %+v", decoded)
+	}
+	alpha, ok := decoded.EffectiveModelParams.ExtraParams["alpha"].(map[string]any)
+	if !ok || len(alpha["nested"].([]any)) != 2 {
+		t.Fatalf("nested extra parameters were not preserved: %#v", decoded.EffectiveModelParams.ExtraParams)
+	}
+
+	textOutput, err := FormatProfileInspection(value, OutputFormatText)
+	if err != nil {
+		t.Fatal(err)
+	}
+	textValue := string(textOutput)
+	if !strings.Contains(textValue, "backend_id: fixture-custom") ||
+		!strings.Contains(textValue, "api_key_env: FIXTURE_PROFILE_API_KEY") ||
+		!strings.Contains(textValue, `extra_params: {"alpha":{"nested":["first",2]},"zeta":true}`) ||
+		!strings.Contains(textValue, "api_key_required: true") {
+		t.Fatalf("unexpected text inspection: %s", textValue)
+	}
+	if strings.Contains(textValue, secret) {
+		t.Fatalf("text inspection exposed an environment secret: %s", textValue)
+	}
+}
+
+func TestFormatProfileInspectionPreservesEmptyBackendAndRejectsNil(t *testing.T) {
+	output, err := FormatProfileInspection(&promptkit.ProfileInspection{
+		ProfileID: "endpoint-only",
+		EffectiveModelParams: promptkit.ExecutionTarget{
+			Endpoint: "http://127.0.0.1:8000/v1",
+			Model:    "fixture-model",
+		},
+	}, OutputFormatJSON)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(string(output), `"backend_id": ""`) ||
+		!strings.Contains(string(output), `"extra_params": {}`) {
+		t.Fatalf("expected explicit empty backend and object extra params, got %s", output)
+	}
+	if _, err := FormatProfileInspection(nil, OutputFormatText); err == nil {
+		t.Fatal("expected nil profile inspection error")
+	}
+}

internal/format/prepared_run.go

@@ -9,37 +9,52 @@ import (
 	"sort"
 	"strings"
 
-	"gitea.maximumdirect.net/eric/scriptorium"
+	"gitea.maximumdirect.net/eric/promptkit"
 )
 
 var ErrUnknownPreparedRunFormat = errors.New("unknown prepared run format")
 
-// PreparedRunOutputFormat is the output format for prepared render data.
+// OutputFormat selects an application-owned textual or JSON representation.
-type PreparedRunOutputFormat string
+type OutputFormat string
 
 const (
-	PreparedRunFormatText PreparedRunOutputFormat = "text"
+	OutputFormatText OutputFormat = "text"
-	PreparedRunFormatJSON PreparedRunOutputFormat = "json"
+	OutputFormatJSON OutputFormat = "json"
 
-	DefaultPreparedRunOutputFormat PreparedRunOutputFormat = PreparedRunFormatText
+	DefaultOutputFormat OutputFormat = OutputFormatText
+)
+
+// PreparedRunOutputFormat is the output format for prepared render data.
+type PreparedRunOutputFormat = OutputFormat
+
+const (
+	PreparedRunFormatText = OutputFormatText
+	PreparedRunFormatJSON = OutputFormatJSON
+
+	DefaultPreparedRunOutputFormat = DefaultOutputFormat
 )
 
 // PreparedRunFormatter serializes a prepared run without performing use case work.
 type PreparedRunFormatter interface {
-	Format(prepared *scriptorium.PreparedRun) ([]byte, error)
+	Format(prepared *promptkit.PreparedRun) ([]byte, error)
 }
 
 // ParsePreparedRunOutputFormat parses a format name.
 func ParsePreparedRunOutputFormat(raw string) (PreparedRunOutputFormat, error) {
-	switch PreparedRunOutputFormat(strings.ToLower(strings.TrimSpace(raw))) {
+	return ParseOutputFormat(raw)
+}
+
+// ParseOutputFormat parses the shared inspection and prepared-run format names.
+func ParseOutputFormat(raw string) (OutputFormat, error) {
+	switch OutputFormat(strings.ToLower(strings.TrimSpace(raw))) {
 	case "":
-		return DefaultPreparedRunOutputFormat, nil
+		return DefaultOutputFormat, nil
-	case PreparedRunFormatText:
+	case OutputFormatText:
-		return PreparedRunFormatText, nil
+		return OutputFormatText, nil
-	case PreparedRunFormatJSON:
+	case OutputFormatJSON:
-		return PreparedRunFormatJSON, nil
+		return OutputFormatJSON, nil
 	default:
-		return "", fmt.Errorf("%w: %q (supported: %s, %s)", ErrUnknownPreparedRunFormat, raw, PreparedRunFormatText, PreparedRunFormatJSON)
+		return "", fmt.Errorf("%w: %q (supported: %s, %s)", ErrUnknownPreparedRunFormat, raw, OutputFormatText, OutputFormatJSON)
 	}
 }
 
@@ -56,7 +71,7 @@ func FormatterForPreparedRun(outputFormat PreparedRunOutputFormat) (PreparedRunF
 }
 
 // FormatPreparedRun formats a prepared run using the selected format.
-func FormatPreparedRun(prepared *scriptorium.PreparedRun, outputFormat PreparedRunOutputFormat) ([]byte, error) {
+func FormatPreparedRun(prepared *promptkit.PreparedRun, outputFormat PreparedRunOutputFormat) ([]byte, error) {
 	formatter, err := FormatterForPreparedRun(outputFormat)
 	if err != nil {
 		return nil, err
@@ -65,7 +80,7 @@ func FormatPreparedRun(prepared *scriptorium.PreparedRun, outputFormat PreparedR
 }
 
 // FormatPreparedRunByName parses a format name and formats a prepared run.
-func FormatPreparedRunByName(prepared *scriptorium.PreparedRun, rawFormat string) ([]byte, error) {
+func FormatPreparedRunByName(prepared *promptkit.PreparedRun, rawFormat string) ([]byte, error) {
 	outputFormat, err := ParsePreparedRunOutputFormat(rawFormat)
 	if err != nil {
 		return nil, err
@@ -75,7 +90,7 @@ func FormatPreparedRunByName(prepared *scriptorium.PreparedRun, rawFormat string
 
 type jsonPreparedRunFormatter struct{}
 
-func (jsonPreparedRunFormatter) Format(prepared *scriptorium.PreparedRun) ([]byte, error) {
+func (jsonPreparedRunFormatter) Format(prepared *promptkit.PreparedRun) ([]byte, error) {
 	if prepared == nil {
 		return nil, errors.New("prepared run is nil")
 	}
@@ -84,7 +99,7 @@ func (jsonPreparedRunFormatter) Format(prepared *scriptorium.PreparedRun) ([]byt
 
 type textPreparedRunFormatter struct{}
 
-func (textPreparedRunFormatter) Format(prepared *scriptorium.PreparedRun) ([]byte, error) {
+func (textPreparedRunFormatter) Format(prepared *promptkit.PreparedRun) ([]byte, error) {
 	if prepared == nil {
 		return nil, errors.New("prepared run is nil")
 	}
@@ -93,6 +108,9 @@ func (textPreparedRunFormatter) Format(prepared *scriptorium.PreparedRun) ([]byt
 	fmt.Fprintf(&b, "prompt: %s\n", prepared.PromptID)
 	fmt.Fprintf(&b, "prompt_version: %s\n", prepared.PromptVersion)
 	fmt.Fprintf(&b, "selected_profile_id: %s\n", prepared.SelectedProfileID)
+	if prepared.SelectedBackendID != "" {
+		fmt.Fprintf(&b, "selected_backend_id: %s\n", prepared.SelectedBackendID)
+	}
 	if prepared.PromptHash != "" {
 		fmt.Fprintf(&b, "prompt_hash: %s\n", prepared.PromptHash)
 	}
@@ -146,7 +164,7 @@ func (textPreparedRunFormatter) Format(prepared *scriptorium.PreparedRun) ([]byt
 
 	fmt.Fprintln(&b, "messages:")
 	roleOrder := make([]string, 0)
-	byRole := make(map[string][]scriptorium.RenderedMessage)
+	byRole := make(map[string][]promptkit.RenderedMessage)
 	for _, msg := range prepared.Messages {
 		if _, exists := byRole[msg.Role]; !exists {
 			roleOrder = append(roleOrder, msg.Role)

internal/format/prepared_run_test.go

@@ -6,7 +6,7 @@ import (
 	"strings"
 	"testing"
 
-	"gitea.maximumdirect.net/eric/scriptorium"
+	"gitea.maximumdirect.net/eric/promptkit"
 )
 
 func TestTextFormatterIncludesPreparedRunDetails(t *testing.T) {
@@ -22,6 +22,7 @@ func TestTextFormatterIncludesPreparedRunDetails(t *testing.T) {
 		"prompt: prompt.id",
 		"prompt_version: v1",
 		"selected_profile_id: local-fast",
+		"selected_backend_id: local",
 		"endpoint: http://llm/v1",
 		"model: gpt-test",
 		"temperature: 0.4",
@@ -107,12 +108,12 @@ func TestTextFormatterDoesNotIncludeDirectAPIKeyValue(t *testing.T) {
 
 func TestTextFormatterIncludesMessageCacheControlBeforeContent(t *testing.T) {
 	prepared := samplePreparedRun()
-	prepared.Messages = []scriptorium.RenderedMessage{
+	prepared.Messages = []promptkit.RenderedMessage{
 		{
 			Role:    "system",
 			Content: "System guidance.",
-			CacheControl: &scriptorium.CacheControl{
+			CacheControl: &promptkit.CacheControl{
-				Type: scriptorium.CacheControlEphemeral,
+				Type: promptkit.CacheControlEphemeral,
 				TTL:  "1h",
 			},
 		},
@@ -147,12 +148,12 @@ func TestTextFormatterIncludesSessionIDWhenPresent(t *testing.T) {
 
 func TestTextFormatterOmitsEmptyCacheControlTTL(t *testing.T) {
 	prepared := samplePreparedRun()
-	prepared.Messages = []scriptorium.RenderedMessage{
+	prepared.Messages = []promptkit.RenderedMessage{
 		{
 			Role:    "system",
 			Content: "System guidance.",
-			CacheControl: &scriptorium.CacheControl{
+			CacheControl: &promptkit.CacheControl{
-				Type: scriptorium.CacheControlEphemeral,
+				Type: promptkit.CacheControlEphemeral,
 			},
 		},
 	}
@@ -230,12 +231,12 @@ func TestJSONFormatterEmitsValidJSONAndIncludesPreparedRunFields(t *testing.T) {
 
 func TestJSONFormatterIncludesMessageCacheControlOnlyWhenPresent(t *testing.T) {
 	prepared := samplePreparedRun()
-	prepared.Messages = []scriptorium.RenderedMessage{
+	prepared.Messages = []promptkit.RenderedMessage{
 		{
 			Role:    "system",
 			Content: "System guidance.",
-			CacheControl: &scriptorium.CacheControl{
+			CacheControl: &promptkit.CacheControl{
-				Type: scriptorium.CacheControlEphemeral,
+				Type: promptkit.CacheControlEphemeral,
 				TTL:  "1h",
 			},
 		},
@@ -261,7 +262,7 @@ func TestJSONFormatterIncludesMessageCacheControlOnlyWhenPresent(t *testing.T) {
 	if !ok {
 		t.Fatalf("expected first message cache_control, got %#v", decoded.Messages[0])
 	}
-	if cacheControl["type"] != string(scriptorium.CacheControlEphemeral) || cacheControl["ttl"] != "1h" {
+	if cacheControl["type"] != string(promptkit.CacheControlEphemeral) || cacheControl["ttl"] != "1h" {
 		t.Fatalf("unexpected cache_control payload: %#v", cacheControl)
 	}
 	if _, ok := decoded.Messages[1]["cache_control"]; ok {
@@ -340,13 +341,15 @@ func TestFormatPreparedRunByNameUnknownFailsClearly(t *testing.T) {
 	}
 }
 
-func samplePreparedRun() *scriptorium.PreparedRun {
+func samplePreparedRun() *promptkit.PreparedRun {
-	return &scriptorium.PreparedRun{
+	return &promptkit.PreparedRun{
 		PromptID:          "prompt.id",
 		PromptVersion:     "v1",
 		PromptHash:        "prompt-hash",
 		SelectedProfileID: "local-fast",
-		EffectiveModelParams: scriptorium.ExecutionTarget{
+		SelectedBackendID: "local",
+		EffectiveModelParams: promptkit.ExecutionTarget{
+			BackendID:       "local",
 			Endpoint:        "http://llm/v1",
 			Model:           "gpt-test",
 			Temperature:     0.4,
@@ -362,7 +365,7 @@ func samplePreparedRun() *scriptorium.PreparedRun {
 			"glossary":   "hash-glossary",
 		},
 		RenderedPromptHash: "rendered-hash",
-		Messages: []scriptorium.RenderedMessage{
+		Messages: []promptkit.RenderedMessage{
 			{Role: "system", Content: "System guidance."},
 			{Role: "user", Content: "Summarize the transcript.\nInclude key entities."},
 			{Role: "user", Content: "Second user message."},

internal/llm/client.go

@@ -1,11 +0,0 @@
-package llm
-
-import (
-	"context"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
-)
-
-// Client executes a rendered prompt against an LLM endpoint.
-type Client interface {
-	Generate(ctx context.Context, req domain.GenerateRequest) (*domain.GenerateResponse, error)
-}

internal/llm/openai_compatible_client.go

@@ -1,385 +0,0 @@
-package llm
-
-import (
-	"bytes"
-	"context"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io"
-	"net/http"
-	"net/url"
-	"os"
-	"strings"
-	"time"
-	"unicode/utf8"
-
-	"gitea.maximumdirect.net/eric/scriptorium/internal/defaults"
-	"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
-)
-
-var (
-	ErrInvalidConfig     = errors.New("invalid llm client configuration")
-	ErrInvalidRequest    = errors.New("invalid generate request")
-	ErrRequestFailed     = errors.New("llm request failed")
-	ErrUnexpectedStatus  = errors.New("llm returned non-success status")
-	ErrMalformedResponse = errors.New("malformed llm response")
-)
-
-type OpenAICompatibleConfig struct {
-	BaseURL    string
-	Model      string
-	Timeout    time.Duration
-	HTTPClient *http.Client
-}
-
-type OpenAICompatibleClient struct {
-	baseURL      string
-	defaultModel string
-	httpClient   *http.Client
-}
-
-func NewOpenAICompatibleClient(cfg OpenAICompatibleConfig) (*OpenAICompatibleClient, error) {
-	baseURL := strings.TrimSpace(cfg.BaseURL)
-	if baseURL != "" {
-		if _, err := url.ParseRequestURI(baseURL); err != nil {
-			return nil, fmt.Errorf("%w: invalid base URL: %v", ErrInvalidConfig, err)
-		}
-	}
-
-	timeout := cfg.Timeout
-	if timeout <= 0 {
-		timeout = defaults.LLMRequestTimeoutDefault
-	}
-
-	var client *http.Client
-	if cfg.HTTPClient != nil {
-		cloned := *cfg.HTTPClient
-		if cloned.Timeout <= 0 {
-			cloned.Timeout = timeout
-		}
-		client = &cloned
-	} else {
-		client = &http.Client{Timeout: timeout}
-	}
-
-	return &OpenAICompatibleClient{
-		baseURL:      strings.TrimRight(baseURL, "/"),
-		defaultModel: cfg.Model,
-		httpClient:   client,
-	}, nil
-}
-
-func (c *OpenAICompatibleClient) Generate(ctx context.Context, req domain.GenerateRequest) (*domain.GenerateResponse, error) {
-	if req.Target.TimeoutSeconds < 0 {
-		return nil, fmt.Errorf("%w: timeout_seconds must be greater than or equal to 0", ErrInvalidRequest)
-	}
-
-	endpoint := strings.TrimSpace(req.Target.Endpoint)
-	if endpoint == "" {
-		endpoint = c.baseURL
-	}
-	if endpoint == "" {
-		return nil, fmt.Errorf("%w: endpoint is required", ErrInvalidRequest)
-	}
-	endpoint = strings.TrimRight(endpoint, "/") + defaults.OpenAIChatCompletionsPath
-
-	wireReq, err := openAIChatRequestFromGenerateRequest(req, c.defaultModel)
-	if err != nil {
-		return nil, fmt.Errorf("%w: %v", ErrInvalidRequest, err)
-	}
-
-	wirePayload, err := openAIChatRequestPayload(wireReq)
-	if err != nil {
-		return nil, fmt.Errorf("%w: %v", ErrInvalidRequest, err)
-	}
-
-	payload, err := json.Marshal(wirePayload)
-	if err != nil {
-		return nil, fmt.Errorf("%w: failed to encode request: %v", ErrRequestFailed, err)
-	}
-
-	requestContext := ctx
-	if req.Target.TimeoutSeconds > 0 {
-		var cancel context.CancelFunc
-		requestContext, cancel = context.WithTimeout(
-			ctx,
-			time.Duration(req.Target.TimeoutSeconds)*time.Second,
-		)
-		defer cancel()
-	}
-
-	httpReq, err := http.NewRequestWithContext(requestContext, http.MethodPost, endpoint, bytes.NewReader(payload))
-	if err != nil {
-		return nil, fmt.Errorf("%w: failed to create request: %v", ErrRequestFailed, err)
-	}
-	httpReq.Header.Set("Content-Type", "application/json")
-	if apiKey := strings.TrimSpace(req.Target.APIKey); apiKey != "" {
-		httpReq.Header.Set("Authorization", "Bearer "+apiKey)
-	} else if envName := strings.TrimSpace(req.Target.APIKeyEnv); envName != "" {
-		apiKey := strings.TrimSpace(os.Getenv(envName))
-		if apiKey == "" {
-			return nil, fmt.Errorf("%w: api key environment variable %q is not set", ErrInvalidRequest, envName)
-		}
-		httpReq.Header.Set("Authorization", "Bearer "+apiKey)
-	}
-
-	httpClient := c.httpClient
-	if httpClient == nil {
-		httpClient = &http.Client{Timeout: defaults.LLMRequestTimeoutDefault}
-	}
-
-	httpResp, err := httpClient.Do(httpReq)
-	if err != nil {
-		return nil, fmt.Errorf("%w: %v", ErrRequestFailed, err)
-	}
-	defer httpResp.Body.Close()
-
-	if httpResp.StatusCode < 200 || httpResp.StatusCode >= 300 {
-		_, _ = io.Copy(io.Discard, io.LimitReader(httpResp.Body, 4096))
-		return nil, fmt.Errorf("%w: status=%d", ErrUnexpectedStatus, httpResp.StatusCode)
-	}
-
-	var wireResp openAIChatResponse
-	if err := json.NewDecoder(httpResp.Body).Decode(&wireResp); err != nil {
-		return nil, fmt.Errorf("%w: failed to decode response: %v", ErrMalformedResponse, err)
-	}
-
-	if len(wireResp.Choices) == 0 {
-		return nil, fmt.Errorf("%w: no choices returned", ErrMalformedResponse)
-	}
-	content := wireResp.Choices[0].Message.Content
-	if content == "" {
-		return nil, fmt.Errorf("%w: first choice has empty message content", ErrMalformedResponse)
-	}
-
-	return &domain.GenerateResponse{
-		Content: content,
-		Usage: domain.TokenUsage{
-			PromptTokens:     wireResp.Usage.PromptTokens,
-			CompletionTokens: wireResp.Usage.CompletionTokens,
-			TotalTokens:      wireResp.Usage.TotalTokens,
-			CachedTokens:     wireResp.Usage.PromptTokensDetails.CachedTokens,
-			CacheWriteTokens: wireResp.Usage.CacheWriteTokens,
-		},
-	}, nil
-}
-
-func openAIChatRequestFromGenerateRequest(req domain.GenerateRequest, defaultModel string) (openAIChatRequest, error) {
-	model := strings.TrimSpace(req.Target.Model)
-	if model == "" {
-		model = strings.TrimSpace(defaultModel)
-	}
-	if model == "" {
-		return openAIChatRequest{}, errors.New("model is required")
-	}
-
-	wireReq := openAIChatRequest{
-		Model: model,
-	}
-	if sessionID := strings.TrimSpace(req.Prompt.SessionID); sessionID != "" {
-		if n := utf8.RuneCountInString(sessionID); n > domain.SessionIDMaxLength {
-			return openAIChatRequest{}, fmt.Errorf("session_id length %d exceeds maximum %d", n, domain.SessionIDMaxLength)
-		}
-		wireReq.SessionID = sessionID
-	}
-
-	wireReq.Messages = make([]openAIChatRequestMessage, 0, len(req.Prompt.Messages))
-	for _, msg := range req.Prompt.Messages {
-		wireReq.Messages = append(wireReq.Messages, openAIChatRequestMessageFromRenderedMessage(msg))
-	}
-
-	if req.Target.Temperature != 0 || req.TargetPresence.Temperature {
-		wireReq.Temperature = &req.Target.Temperature
-	}
-	if req.Target.MaxTokens != 0 || req.TargetPresence.MaxTokens {
-		wireReq.MaxTokens = &req.Target.MaxTokens
-	}
-	if req.Target.TopP != 0 || req.TargetPresence.TopP {
-		wireReq.TopP = &req.Target.TopP
-	}
-	if strings.TrimSpace(req.Target.ServiceTier) != "" {
-		wireReq.ServiceTier = req.Target.ServiceTier
-	}
-	if strings.TrimSpace(req.Target.ReasoningEffort) != "" {
-		wireReq.ReasoningEffort = req.Target.ReasoningEffort
-	}
-	if len(req.Target.ExtraParams) > 0 {
-		wireReq.ExtraParams = req.Target.ExtraParams
-	}
-	if req.StructuredOutput != nil {
-		responseFormat, err := toOpenAIResponseFormat(req.StructuredOutput)
-		if err != nil {
-			return openAIChatRequest{}, err
-		}
-		wireReq.ResponseFormat = responseFormat
-	}
-
-	return wireReq, nil
-}
-
-type openAIChatRequest struct {
-	Model           string                     `json:"model"`
-	SessionID       string                     `json:"session_id,omitempty"`
-	Messages        []openAIChatRequestMessage `json:"messages"`
-	Temperature     *float64                   `json:"temperature,omitempty"`
-	MaxTokens       *int                       `json:"max_tokens,omitempty"`
-	TopP            *float64                   `json:"top_p,omitempty"`
-	ServiceTier     string                     `json:"service_tier,omitempty"`
-	ReasoningEffort string                     `json:"reasoning_effort,omitempty"`
-	ResponseFormat  *openAIResponseFormat      `json:"response_format,omitempty"`
-	ExtraParams     map[string]any             `json:"-"`
-}
-
-func openAIChatRequestPayload(req openAIChatRequest) (map[string]any, error) {
-	out := map[string]any{
-		"model":    req.Model,
-		"messages": req.Messages,
-	}
-	if req.SessionID != "" {
-		out["session_id"] = req.SessionID
-	}
-	if req.Temperature != nil {
-		out["temperature"] = *req.Temperature
-	}
-	if req.MaxTokens != nil {
-		out["max_tokens"] = *req.MaxTokens
-	}
-	if req.TopP != nil {
-		out["top_p"] = *req.TopP
-	}
-	if req.ServiceTier != "" {
-		out["service_tier"] = req.ServiceTier
-	}
-	if req.ReasoningEffort != "" {
-		out["reasoning_effort"] = req.ReasoningEffort
-	}
-	if req.ResponseFormat != nil {
-		out["response_format"] = req.ResponseFormat
-	}
-
-	for key, value := range req.ExtraParams {
-		if key == "" {
-			return nil, errors.New("extra_params key must not be empty")
-		}
-		if _, reserved := reservedOpenAIChatRequestFields[key]; reserved {
-			return nil, fmt.Errorf("extra_params key %q collides with reserved request field", key)
-		}
-		if _, err := json.Marshal(value); err != nil {
-			return nil, fmt.Errorf("extra_params.%s must be JSON-serializable: %w", key, err)
-		}
-		out[key] = value
-	}
-
-	return out, nil
-}
-
-var reservedOpenAIChatRequestFields = map[string]struct{}{
-	"model":            {},
-	"session_id":       {},
-	"messages":         {},
-	"temperature":      {},
-	"max_tokens":       {},
-	"top_p":            {},
-	"service_tier":     {},
-	"reasoning_effort": {},
-	"response_format":  {},
-}
-
-type openAIChatRequestMessage struct {
-	Role    string `json:"role"`
-	Content any    `json:"content"`
-}
-
-type openAIChatTextContentBlock struct {
-	Type         string              `json:"type"`
-	Text         string              `json:"text"`
-	CacheControl *openAICacheControl `json:"cache_control,omitempty"`
-}
-
-type openAICacheControl struct {
-	Type string `json:"type"`
-	TTL  string `json:"ttl,omitempty"`
-}
-
-type openAIChatResponseMessage struct {
-	Role    string `json:"role"`
-	Content string `json:"content"`
-}
-
-type openAIChatResponse struct {
-	Choices []struct {
-		Message openAIChatResponseMessage `json:"message"`
-	} `json:"choices"`
-	Usage struct {
-		PromptTokens        int `json:"prompt_tokens"`
-		CompletionTokens    int `json:"completion_tokens"`
-		TotalTokens         int `json:"total_tokens"`
-		PromptTokensDetails struct {
-			CachedTokens int `json:"cached_tokens"`
-		} `json:"prompt_tokens_details"`
-		CacheWriteTokens int `json:"cache_write_tokens"`
-	} `json:"usage"`
-}
-
-type openAIResponseFormat struct {
-	Type       string                    `json:"type"`
-	JSONSchema *openAIJSONSchemaEnvelope `json:"json_schema,omitempty"`
-}
-
-type openAIJSONSchemaEnvelope struct {
-	Name   string `json:"name"`
-	Strict bool   `json:"strict"`
-	Schema any    `json:"schema"`
-}
-
-func openAIChatRequestMessageFromRenderedMessage(msg domain.RenderedMessage) openAIChatRequestMessage {
-	wireMsg := openAIChatRequestMessage{
-		Role:    msg.Role,
-		Content: msg.Content,
-	}
-	if msg.CacheControl == nil {
-		return wireMsg
-	}
-
-	wireMsg.Content = []openAIChatTextContentBlock{
-		{
-			Type: "text",
-			Text: msg.Content,
-			CacheControl: &openAICacheControl{
-				Type: string(msg.CacheControl.Type),
-				TTL:  msg.CacheControl.TTL,
-			},
-		},
-	}
-	return wireMsg
-}
-
-func toOpenAIResponseFormat(spec *domain.StructuredOutputSpec) (*openAIResponseFormat, error) {
-	if spec == nil {
-		return nil, nil
-	}
-
-	switch spec.Type {
-	case domain.StructuredOutputJSONSchema:
-		if spec.JSONSchema == nil {
-			return nil, errors.New("json_schema structured output requires schema payload")
-		}
-		if strings.TrimSpace(spec.JSONSchema.Name) == "" {
-			return nil, errors.New("json_schema structured output requires non-empty schema name")
-		}
-		if spec.JSONSchema.Schema == nil {
-			return nil, errors.New("json_schema structured output requires schema document")
-		}
-		return &openAIResponseFormat{
-			Type: "json_schema",
-			JSONSchema: &openAIJSONSchemaEnvelope{
-				Name:   spec.JSONSchema.Name,
-				Strict: spec.JSONSchema.Strict,
-				Schema: spec.JSONSchema.Schema,
-			},
-		}, nil
-	default:
-		return nil, fmt.Errorf("unsupported structured output type %q", spec.Type)
-	}
-}

internal/profile/builtin/assets/aion-labs/aion-2.yml

@@ -1,9 +0,0 @@
-id: aion-2
-endpoint: https://openrouter.ai/api/v1
-model: aion-labs/aion-2.0
-temperature: 0.72
-reasoning_effort: high
-top_p: 0.95
-timeout_seconds: 180
-api_key_env: OPENROUTER_API_KEY
-service_tier: flex

internal/profile/builtin/assets/anthropic/claude-fable-latest.yml

@@ -1,7 +0,0 @@
-id: claude-fable-latest
-endpoint: https://openrouter.ai/api/v1
-model: "~anthropic/claude-fable-latest"
-reasoning_effort: high
-timeout_seconds: 600
-api_key_env: OPENROUTER_API_KEY
-service_tier: flex

internal/profile/builtin/assets/anthropic/claude-haiku-latest.yml

@@ -1,7 +0,0 @@
-id: claude-haiku-latest
-endpoint: https://openrouter.ai/api/v1
-model: "~anthropic/claude-haiku-latest"
-reasoning_effort: medium
-timeout_seconds: 240
-api_key_env: OPENROUTER_API_KEY
-service_tier: flex

internal/profile/builtin/assets/anthropic/claude-opus-latest.yml

@@ -1,7 +0,0 @@
-id: claude-opus-latest
-endpoint: https://openrouter.ai/api/v1
-model: "~anthropic/claude-opus-latest"
-reasoning_effort: high
-timeout_seconds: 240
-api_key_env: OPENROUTER_API_KEY
-service_tier: flex

internal/profile/builtin/assets/anthropic/claude-sonnet-latest.yml

@@ -1,7 +0,0 @@
-id: claude-sonnet-latest
-endpoint: https://openrouter.ai/api/v1
-model: "~anthropic/claude-sonnet-latest"
-reasoning_effort: high
-timeout_seconds: 240
-api_key_env: OPENROUTER_API_KEY
-service_tier: flex

internal/profile/builtin/assets/deepseek/deepseek-3-2.yml

@@ -1,7 +0,0 @@
-id: deepseek-3-2
-endpoint: https://openrouter.ai/api/v1
-model: deepseek/deepseek-v3.2
-reasoning_effort: high
-timeout_seconds: 180
-api_key_env: OPENROUTER_API_KEY
-service_tier: flex