9 Commits

26 changed files with 4208 additions and 411 deletions

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@@ -40,12 +40,12 @@ type Backend struct {
// calls allowed for this backend within one Engine. Zero leaves the backend
// unlimited. A negative value makes NewEngine fail with ErrInvalidConfig.
ConcurrencyLimit int
// QueueCapacity controls how many additional Run calls may be admitted
// beyond ConcurrencyLimit. Nil uses 1024 when ConcurrencyLimit is positive;
// a pointer uses its exact value, including zero. The pointed-to value must
// be non-negative, and QueueCapacity must be nil when ConcurrencyLimit is
// zero. Their sum must fit in an int. WithBackend copies the value and does
// not retain the pointer.
// QueueCapacity controls how many additional Run or RunPrepared calls may
// be admitted beyond ConcurrencyLimit. Nil uses 1024 when ConcurrencyLimit
// is positive; a pointer uses its exact value, including zero. The pointed-to
// value must be non-negative, and QueueCapacity must be nil when
// ConcurrencyLimit is zero. Their sum must fit in an int. WithBackend copies
// the value and does not retain the pointer.
QueueCapacity *int
}

37
doc.go
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@@ -3,23 +3,25 @@
//
// Applications construct an [Engine] with [NewEngine], select filesystem or
// in-memory sources and optional engine-scoped [Backend] registrations, and
// call [Engine.Prepare] or [Engine.Run]. Concrete registries, repositories,
// validators, and the built-in OpenAI-compatible client remain internal
// implementation details.
// call [Engine.Prepare], [Engine.PrepareExecution], [Engine.Run], or
// [Engine.RunPrepared]. Concrete registries, repositories, validators, and the
// built-in OpenAI-compatible client remain internal implementation details.
//
// # Concurrency and ownership
//
// An Engine supports concurrent Prepare and Run calls. Engine-local backend
// policies bound admitted Run calls and model generations where configured,
// while different backend pools and unlimited backends continue independently.
// An injected [LLMClient] or [ArtifactReader] can therefore still receive
// concurrent calls and must be safe for that use.
// An Engine supports concurrent Prepare, PrepareExecution, Run, and RunPrepared
// calls. Engine-local backend policies bound admitted Run and RunPrepared calls
// and model generations where configured, while different backend pools and
// unlimited backends continue independently. An injected [LLMClient] or
// [ArtifactReader] can therefore still receive concurrent calls and must be
// safe for that use.
//
// NewEngine copies in-memory profiles and backend definitions. Prepare and Run
// copy request maps, slices, pointer values, and JSON-compatible extra
// parameters before using them. Returned values and values passed to extension
// interfaces are likewise isolated from engine state. Callers own those copies
// and may mutate them after the call that supplied or returned them.
// NewEngine copies in-memory profiles and backend definitions. Prepare,
// PrepareExecution, and Run copy request maps, slices, pointer values, and
// JSON-compatible extra parameters before using them. Returned values and
// values passed to extension interfaces are likewise isolated from engine
// state. Callers own those copies and may mutate them after the call that
// supplied or returned them.
//
// # Security and sensitive data
//
@@ -45,10 +47,11 @@
// [GenerateResponse], [ExecutionTargetPresence], and the string value types
// used by those values.
//
// Construction values, including [Config], [Backend], [RunRequest],
// [ArtifactRef], [ExecutionTargetOverride], [Profile], and
// [OpenAICompatibleProfileConfig], do not have stable JSON representations.
// Direct API keys are nevertheless excluded from JSON for every public value.
// Construction and handle values, including [Config], [Backend], [RunRequest],
// [ArtifactRef], [ExecutionTargetOverride], [Profile],
// [OpenAICompatibleProfileConfig], and [PreparedExecution], do not have stable
// JSON representations. Direct API keys are nevertheless excluded from JSON
// for every public value.
//
// JSON timestamps use time.Time's RFC 3339 encoding and are omitted when zero.
// PreparedRun and RunResult durations are encoded as integer milliseconds in

View File

@@ -44,7 +44,9 @@ validation, and profile precedence are defined by the
[`Engine.Prepare`](../../engine.go) resolves the selected prompt and profile,
loads inputs and any structured-output schema, and renders messages without
calling a model client:
calling a model client. Choose it when the prepared value is the final
inspection or persistence result and no later execution must be tied to that
exact snapshot:
```go
prepared, err := engine.Prepare(ctx, promptkit.RunRequest{
@@ -61,12 +63,48 @@ shows a complete runnable setup with a prompt file, in-memory profile, and
inline input. Exact request requirements and prepared-result fields belong to
the [`RunRequest` and `PreparedRun` GoDoc](../../types.go).
## Prepare Now And Execute The Same Snapshot Later
Use [`Engine.PrepareExecution`](../../engine.go) when an application must
inspect or persist preflight details before deciding whether to start model
work, while ensuring that later execution uses those exact rendered messages,
inputs, target settings, and validation resources:
```go
preparedExecution, err := engine.PrepareExecution(ctx, promptkit.RunRequest{
PromptID: "meeting.summary",
Inputs: map[string]promptkit.ArtifactRef{
"note": promptkit.Inline("Synthetic meeting notes"),
},
})
if err != nil {
return err
}
defer preparedExecution.Discard()
details := preparedExecution.Details()
// Inspect or persist an application-selected safe subset of details.
result, err := engine.RunPrepared(ctx, preparedExecution)
```
Preparation does not call the model or reserve backend capacity.
`RunPrepared` executes from the retained snapshot rather than reloading
consumer sources. The handle is opaque in-process state, while `Details`
contains rendered content and remains subject to the application's data
handling policy. The
[`PreparedExecution` and method GoDoc](../../prepared_execution.go) and
[engine operation GoDoc](../../engine.go) own exact lifecycle, engine-binding,
credential, cancellation, timing, and error semantics.
## Execute And Validate
[`Engine.Run`](../../engine.go) performs the same preparation, invokes the
configured model client, classifies the generated artifact, and validates the
content. A completed content check may return `ValidationFailed` in the result;
an operational inability to validate returns an error.
content in one call. Choose it when the application does not need a preflight
boundary tied to the eventual execution. A completed content check may return
`ValidationFailed` in the result; an operational inability to validate returns
an error.
The maintained
[offline execution example](../../examples/go-library/run/main.go) injects a

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@@ -29,21 +29,28 @@ One pool owns immutable active and total limits plus mutex-protected admission
count, active count, and ordered waiter list. Pool state exists only for the
lifetime of its engine.
## Bounded Run Admission
## Bounded Execution Admission
The runner asks the manager to admit a run after resolving the prompt, profile,
selected backend, effective execution target, credentials, and output contract,
but before schema loading, artifact loading, or rendering. Admission is
immediate: a limited pool either reserves a slot or returns the internal
`ErrCapacityExceeded` identity. The root facade maps that identity to the
public error without treating it as an invalid request or generation failure.
For ordinary `Run`, the runner asks the manager to admit after resolving the
prompt, profile, selected backend, effective execution target, credentials, and
output contract, but before schema loading, artifact loading, or rendering.
`PrepareExecution` performs no admission. `RunPrepared` claims its handle,
rechecks credential availability, and then asks the manager to admit the
frozen backend before generation.
Admission is immediate: a limited pool either reserves a slot or returns the
internal `ErrCapacityExceeded` identity. The root facade maps that identity to
the public error without treating it as an invalid request or generation
failure.
The total admitted bound is the active-generation limit plus its configured
waiting capacity. The returned release function is idempotent. The runner
defers it as soon as admission succeeds and holds the lease across remaining
preparation, initial generation, validation, every repair attempt, and all
failure or cancellation exits. A repair is part of its original admission and
does not reserve another bounded slot.
defers it as soon as admission succeeds. An ordinary run holds the lease across
remaining preparation, initial generation, validation, every repair attempt,
and all failure or cancellation exits. Prepared execution holds the normal
lease across generation, validation, every internal repair attempt, and all
execution exits. A repair is part of its original admission and does not
reserve another bounded slot.
## FIFO Generation Permits
@@ -90,11 +97,17 @@ unlimited admission. The
FIFO transfer, canceled-waiter removal, grant/cancel races, independent pools,
unlimited calls, passthrough behavior, and panic release.
The [runner tests](../../internal/usecase/runner_test.go) own early admission,
lease lifetime, failure release, and shared initial/repair scheduling. The
The [runner tests](../../internal/usecase/runner_test.go) own ordinary early
admission, lease lifetime, failure release, and shared initial/repair
scheduling. The
[prepared-execution use-case tests](../../internal/usecase/prepared_execution_test.go)
own deferred admission, credential ordering, and prepared-execution lease
release. The
[external package capacity tests](../../capacity_contract_test.go) own the
assembled public-engine behavior for configured limits, capacity errors,
endpoint identity, engine independence, and injected clients. The
[prepared-execution contract tests](../../prepared_execution_contract_test.go)
own the public prepared-capacity boundary. The
[root error-boundary tests](../../errors_internal_test.go) own preservation of
the public generation category and context identity when generation is
canceled.

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@@ -43,6 +43,21 @@ without making the model client depend on registry configuration.
The implementation has no retry loop, tool-call support, provider catalog,
inbound HTTP behavior, or durable session store.
## Prepared Generation
For [`RunPrepared`](../../engine.go), the runner supplies the model client with
the target, rendered messages, and structured-output constraint retained by
executable preparation. Execution does not reopen or rerender consumer
sources.
Before backend admission, the runner rechecks that the frozen credential
environment-variable name is available. The handle does not retain the
environment value; the model client resolves the value visible when generation
begins. A direct request key remains in private execution state only until the
claimed execution finishes or an unclaimed handle is discarded. Exact public
ownership and redaction semantics belong to the
[`PreparedExecution` GoDoc](../../prepared_execution.go).
## Failure Categories
The package preserves distinct error identities for invalid client

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@@ -11,23 +11,23 @@ contributor workflow and validation.
| Component | Implemented responsibility | References |
| --- | --- | --- |
| Root `promptkit` package | Provides the supported engine facade, source, backend-registration, and injection options, public request and result values, profile construction, extension interfaces, value conversion, redacted formatting, public error mapping, and engine-local assembly. | [Package GoDoc](../../doc.go), [backend API](../../backends.go), [engine assembly](../../engine.go) |
| Root `promptkit` package | Provides the supported engine facade, source, backend-registration, and injection options, public request and result values, opaque prepared-execution handles, profile construction, extension interfaces, value conversion, redacted formatting, public error mapping, and engine-local assembly. | [Package GoDoc](../../doc.go), [prepared execution](../../prepared_execution.go), [backend API](../../backends.go), [engine assembly](../../engine.go) |
| `examples/go-library/prepare` | Demonstrates an offline downstream consumer using a prompt file, in-memory profile, inline input, and `Prepare`. It is not a public library package. | [Example program](../../examples/go-library/prepare/main.go) |
| `examples/go-library/run` | Demonstrates an offline downstream consumer using a prompt file, in-memory profile, inline input, an injected deterministic model client, and `Run`. It is not a public library package. | [Example program](../../examples/go-library/run/main.go) |
| `internal/backend` | Constructs each engine's immutable registry from the built-in OpenRouter definition and consumer additions, validates and defensively copies definitions through the shared JSON-value package, and consumes the LLM-owned OpenAI-compatible reserved request-field rule. | [Backend registry](../../internal/backend/registry.go) |
| `internal/capacity` | Owns engine-local bounded run admission and FIFO model-generation permits for limited backend IDs, including cancellation-safe waiter removal and client wrapping. | [Internal capacity management](capacity.md) |
| `internal/capacity` | Owns engine-local bounded execution admission and FIFO model-generation permits for limited backend IDs, including cancellation-safe waiter removal and client wrapping. | [Internal capacity management](capacity.md) |
| `internal/domain` | Defines internal framework values for requests, artifacts, prompt definitions, profiles, execution targets, rendering, generation, and validation. | [Domain declarations](../../internal/domain/domain.go) |
| `internal/defaults` | Defines application-neutral framework constants and constructs the default execution target. It contains no CLI, server, or inbound HTTP limits. | [Framework defaults](../../internal/defaults/defaults.go) |
| `internal/filecatalog` | Provides deterministic YAML discovery and path helpers for operating-system filesystems and `fs.FS` sources. | [File catalog](../../internal/filecatalog/catalog.go) |
| `internal/jsonvalue` | Validates and deeply copies JSON-compatible extra-parameter trees while preserving supported concrete value types. | [JSON values](../../internal/jsonvalue/jsonvalue.go) |
| `internal/jsonvalue` | Validates and deeply copies JSON-compatible extra-parameter and prepared-schema trees while preserving supported concrete value types. | [JSON values](../../internal/jsonvalue/jsonvalue.go) |
| `internal/promptdef` | Loads strictly decoded, validated prompt definitions from filesystem and `fs.FS` sources, including version selection and contained file-backed message content. | [Framework formats](../formats.md), [prompt-definition repository](../../internal/promptdef/filesystem_repository.go) |
| `internal/profile` | Loads strictly decoded, validated execution profiles, including backend selection, from filesystem and `fs.FS` sources and composes repositories with error-preserving fallback. | [Framework formats](../formats.md), [profile repositories](../../internal/profile/filesystem_repository.go) |
| `internal/profile/builtin` | Embeds the built-in profile catalog, whose entries select OpenRouter, and combines it with an optional primary repository. | [Built-in catalog](../formats.md#built-in-profile-catalog), [repository](../../internal/profile/builtin/repository.go) |
| `internal/prompt` | Renders prompt messages from Go templates with artifact, variable, session, and cache-control data. | [Go-template renderer](../../internal/prompt/go_renderer.go) |
| `internal/artifact` | Resolves ordinary inline and unrestricted caller-selected file references into copied artifacts with metadata and hashes. | [Internal sources and validation](sources.md) |
| `internal/validate` | Validates basic, JSON, and JSON Schema output using operating-system filesystem or `fs.FS` schema sources. | [Framework formats](../formats.md#schemas), [internal sources and validation](sources.md) |
| `internal/validate` | Validates basic, JSON, and JSON Schema output using operating-system filesystem or `fs.FS` schema sources and creates frozen validation plans for prepared execution. | [Framework formats](../formats.md#schemas), [internal sources and validation](sources.md) |
| `internal/llm` | Defines the internal generation boundary and implements outbound OpenAI-compatible chat requests from resolved execution targets, including response decoding, authentication, deadline handling, and ownership of the OpenAI-compatible reserved request-field policy. | [Internal model client](llm.md) |
| `internal/usecase` | Resolves backend, profile, and request settings and coordinates preparation and execution across internal sources, rendering, artifact loading, generation, validation, and optional repair. | [Internal runner](runner.md) |
| `internal/usecase` | Resolves backend, profile, and request settings and coordinates preparation, ordinary execution, and one-attempt prepared execution across internal sources, rendering, artifact loading, generation, validation, capacity, and optional repair. | [Internal runner](runner.md), [prepared-execution implementation](../../internal/usecase/prepared_execution.go) |
The root package assembles these internal components without exposing their
representations. Consumers depend only on the root facade.

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@@ -68,6 +68,22 @@ filesystem or an `fs.FS`. Invalid generated content is returned as a validation
result; inability to load, register, or compile a schema is an operational
error.
For executable preparation, the built-in validators create a frozen validation
plan. None, basic, and JSON modes retain the effective output contract without
source access. JSON Schema mode loads the root document, resolves and compiles
every transitive reference during preparation, and retains the compiled
validator. The provider-facing structured-output metadata uses that same
captured root document.
`PrepareExecution` also completes prompt and profile selection, artifact
loading and hashing, session and message rendering, and target resolution.
`RunPrepared` uses the retained source-derived state and validation plan; it
does not reopen prompt, profile, input, or schema sources and does not rerender
the request. By contrast, ordinary `Prepare` produces an inspection value only:
a later `Run` performs its own source resolution and preparation.
The [validator tests](../../internal/validate/standard_validator_test.go) own
basic, JSON, JSON Schema, source resolution, schema loading, compilation, and
content-failure behavior.
basic, JSON, JSON Schema, source resolution, schema loading, compilation,
frozen-reference behavior, and content-failure behavior. Prepared execution
orchestration is owned by the
[use-case tests](../../internal/usecase/prepared_execution_test.go).

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@@ -33,9 +33,36 @@ consumers.
## Ideas
No ideas are currently cataloged. Backend-specific concurrency management has
been selected for active planning in the
[focused concurrency roadmap](concurrency.md).
Prompt-independent profile inspection has been selected for active planning in
the [focused feature roadmap](profile-inspection.md). The remaining ideas are
still available for future selection.
### Prompt-definition inspection
Provide exact prompt-definition lookup without rendering, placeholder inputs,
profile resolution, or model generation, as requested by
[Weatherreporter](weatherreporter-promptkit-wishlist.md#priority-2-prompt-definition-inspection).
- Return caller-owned identity, version, input definitions, default-profile,
output-contract, and opaque definition-equality information.
- Apply ordinary prompt-source precedence and exact ID/version selection.
- Validate the selected definition and referenced prompt content
structurally, without returning source bodies or rendered messages.
- Leave complete cross-source corpus validation and enumeration outside the
initial inspection contract.
### Structured capacity errors
Add safe structured context to backend admission rejection, as requested by
[Notarius](notarius-promptkit-wishlist.md#priority-4-structured-capacity-errors)
and
[Weatherreporter](weatherreporter-promptkit-wishlist.md#structured-capacity-errors).
- Preserve compatibility with `errors.Is(err, ErrCapacityExceeded)`.
- Support `errors.As` to obtain the stable backend ID.
- Do not expose endpoints, credential configuration or values, request
content, or speculative retry timing.
- Keep retry and backoff policy with downstream consumers.
## Entry Format

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@@ -1,386 +1,670 @@
# Local Backend Convenience Implementation Plan
# Prompt-Independent Profile Inspection Implementation Plan
**Status:** Complete.
**Status:** Ready for implementation.
## Purpose
This document is the decision-complete implementation plan for
[local backend convenience](local-backend.md). It is written for a coding
agent that will implement each stage in order.
[prompt-independent profile inspection](profile-inspection.md). It is written
for a coding agent that will implement each stage in order.
The feature roadmap owns the motivation, consumer paths, policy choices,
The feature roadmap owns the motivation, consumer workflow, policy choices,
compatibility requirements, non-goals, and target end state. This document
owns the exact proposed API, file-level changes, implementation sequence, test
owns the concrete design, file-level changes, implementation sequence, test
ownership, documentation work, validation commands, and completion gates.
## Implementation Rules
- Complete the stages in order. Keep the root package compiling and its
focused tests passing at every stage boundary.
- Preserve unrelated working-tree changes. The feature roadmap may already be
uncommitted when implementation begins; retain it.
- Complete the stages in order. Keep the repository compiling and the focused
tests passing at every stage boundary.
- Preserve unrelated working-tree changes. In particular, retain the accepted
feature roadmap and the corresponding future-roadmap and downstream-wishlist
edits that may already be uncommitted.
- Follow every policy under `docs/policy/`, the task-specific reading guide in
`docs/development.md`, and the accepted behavior in
`local-backend.md`.
- Keep the API in the root `promptkit` package. Do not add a public or internal
package for this feature.
- Implement the helper as a transparent constructor for the existing
`Backend` type. Do not add a second backend representation or bypass
`WithBackend`.
- Leave normalization, validation, copying, registry construction, capacity
defaulting, and duplicate detection in their existing owners.
- Do not add environment-variable discovery, package-global registration,
implicit local defaults, model selection, profile construction, or support
for non-OpenAI-compatible transports.
- Keep tests lean and behavior-focused. Do not duplicate the existing
registry and concurrency test matrices merely because the constructor
reaches those mechanisms.
- Update exact GoDoc with the exported declarations. Update current-state
consumer guidance only after the corresponding API is implemented.
- Do not update release notes, create a release, change a module version, or
tag a commit as part of this work.
`profile-inspection.md`.
- Keep the supported API in the root `promptkit` package. Profile repositories,
backend resolution, and target assembly remain below Go's `internal/`
boundary.
- Reuse the exact profile-source, backend-membership, and execution-target
precedence used by `Prepare`, `PrepareExecution`, and `Run`. Do not create a
second profile loader, backend registry, or target-merging implementation.
- Preserve the observable behavior and error ordering of existing preparation
and execution methods. The new inspection operation must not require a
prompt, prompt default profile, request override, credential value, capacity
admission, model client, renderer, artifact reader, schema source, or
validator.
- Treat structural validation as the existing profile, backend, and effective
target invariants. Do not add new endpoint URL policy, provider
connectivity checks, reserved-extra-parameter policy, credential syntax, or
file-format validation rules as part of this feature.
- Never read, retain, return, format, or log an environment credential value.
The result may contain only the effective environment-variable name and the
direct-key-required boolean.
- Return caller-owned public values. In particular, nested
`ExecutionTarget.ExtraParams` maps, slices, and objects must not alias
engine-owned state or another inspection result.
- Keep tests lean and behavior-focused. Reuse existing profile repository,
backend registry, target precedence, and preparation tests rather than
duplicating their complete matrices.
- Update exact contracts in GoDoc with the exported declarations. Update
current-state consumer, format, and internal documentation only after the
corresponding code exists.
- Do not add release notes, change a module version, create a release, or tag a
commit as part of this work.
## Fixed Design
### Exported API
### Public API
Add these declarations to `backends.go` in package `promptkit`:
Add this root-package value immediately after `ExecutionTarget` in `types.go`:
```go
// BackendLocal is the conventional ID used by LocalBackend. It is not a
// built-in or reserved backend and must be registered with WithBackend.
const BackendLocal = "local"
// LocalBackend returns a Backend for a conventional local OpenAI-compatible
// endpoint.
func LocalBackend(endpoint string, concurrencyLimit int) Backend {
return Backend{
ID: BackendLocal,
Endpoint: endpoint,
ConcurrencyLimit: concurrencyLimit,
}
// ProfileInspection is the caller-owned result of Engine.InspectProfile.
// The exact GoDoc is specified below.
type ProfileInspection struct {
ProfileID string
EffectiveModelParams ExecutionTarget
APIKeyRequired bool
}
```
The exact GoDoc may be wrapped or expanded for clarity, but it must own and
communicate all of these contract points:
- `BackendLocal` is the case-sensitive conventional ID `"local"`;
- it is neither built in nor reserved;
- calling `LocalBackend` does not register anything;
- the returned value must be supplied through `WithBackend`;
- `endpoint` and `concurrencyLimit` are copied into the corresponding fields
without normalization or validation;
- `APIKeyEnv`, `ExtraParams`, and `QueueCapacity` retain their zero values; and
- normal `NewEngine` backend validation and concurrency semantics apply after
registration.
Keep `BackendOpenRouter` unchanged. `BackendLocal` must not alias an internal
registry constant because the internal registry has no special local-backend
identity or behavior.
Place `BackendLocal` near `BackendOpenRouter`, and place `LocalBackend` after
the `Backend` declaration and before `WithBackend`. This keeps the conventional
IDs, configured value, convenience constructor, and registration option
discoverable in one file.
### Constructor Semantics
`LocalBackend` is a pure struct constructor. Its complete behavior is
equivalent to the keyed literal shown above.
In particular, the constructor must not:
- trim or parse the endpoint;
- reject blank endpoints or negative limits;
- choose a default limit;
- assign an API-key environment variable;
- allocate an empty `ExtraParams` map;
- assign a queue-capacity pointer;
- read process environment;
- mutate package-global or engine state; or
- call `WithBackend` itself.
Deferred validation is intentional. It keeps one validation path for all
`Backend` values: `WithBackend` copies the public value into engine options,
and `NewEngine` constructs the validated immutable registry. A positive limit
with a nil queue continues to select the existing default queue capacity of
1024; zero continues to mean unlimited; a negative value continues to make
`NewEngine` fail with `ErrInvalidConfig`.
The returned `Backend` remains an ordinary caller-owned value. Consumers can
modify it before passing it to `WithBackend`, although task-oriented
documentation should direct materially customized configurations to an
explicit keyed `Backend` literal.
### Identity And Compatibility
Do not add `"local"` to the internal built-in or reserved ID set. A consumer
must be able to register either:
Add this method to `Engine` in `engine.go`, immediately before `Prepare`:
```go
promptkit.LocalBackend(endpoint, limit)
func (e *Engine) InspectProfile(
ctx context.Context,
profileID string,
) (*ProfileInspection, error)
```
or:
Do not accept `RunRequest`, `ExecutionTargetOverride`, an API key, an
environment override, or options on this method. Exact inspection of one
explicit profile ID is the complete operation.
`ProfileInspection` has no stable JSON contract. Do not add JSON tags,
`MarshalJSON`, `UnmarshalJSON`, or a custom string representation. Ordinary Go
encoding of the exported fields is not prohibited, but consumers must not be
promised compatibility for that encoding.
The exact type and method GoDoc must establish:
- surrounding whitespace is trimmed from `profileID`; the resulting nonblank
ID is looked up exactly and case-sensitively;
- the result applies the engine's ordinary in-memory, configured-source, and
built-in profile precedence;
- `EffectiveModelParams` contains framework defaults overlaid by the selected
backend and then the selected profile, with no request override;
- `EffectiveModelParams.BackendID` is empty for endpoint-only profiles;
- `EffectiveModelParams.APIKeyEnv` is an environment-variable name and never
its value;
- `APIKeyRequired` means a direct request credential is required and is
mutually exclusive with a nonblank effective `APIKeyEnv`;
- the method never derives an ID from a prompt's `default_profile`;
- the method performs no prompt lookup, rendering, artifact or schema work,
backend admission, provider connectivity check, or model generation;
- credential availability is not checked, so an absent or blank named
environment variable is not an error;
- the returned value and all nested mutable values are caller-owned;
- filesystem-backed inspection is a point-in-time lookup and does not freeze
a profile for a later execution;
- a nil engine matches `ErrInvalidConfig`;
- a blank ID matches `ErrInvalidRequest`;
- an absent exact ID matches `ErrProfileNotFound` and not `ErrProfileLoad`;
- malformed or unreadable profile data, an unknown backend, or an invalid
resolved target matches `ErrProfileLoad`;
- cancellation observed during profile loading matches `ErrProfileLoad` while
preserving the context error through `errors.Is`; and
- the method returns no partial result on error.
Update the `Engine` type GoDoc to include `InspectProfile` among the operations
safe for concurrent calls. Do not imply that injected collaborators become
safe when their existing contracts do not provide that guarantee.
Update `doc.go` in the same stage:
- include `Engine.InspectProfile` in the package's operation list;
- include inspection in the concurrency and caller-ownership summary; and
- list `ProfileInspection` among construction and inspection values without a
stable JSON representation.
Do not add `ProfileInspection` to the stable JSON list.
### Internal Result
Add this internal value to `internal/domain/domain.go` near
`ExecutionProfile` and `ExecutionTarget`:
```go
promptkit.Backend{
ID: promptkit.BackendLocal,
Endpoint: endpoint,
// ProfileInspection is the resolved result of exact profile inspection.
type ProfileInspection struct {
ProfileID string
EffectiveModelParams ExecutionTarget
APIKeyRequired bool
}
```
through the existing `WithBackend` option. Both forms participate in ordinary
duplicate-ID detection. Existing consumers that already use the literal ID
`"local"` remain source- and behavior-compatible.
Do not add JSON or YAML tags. The internal value is a use-case result, not a
file format or persistence contract.
No existing `Backend`, `WithBackend`, profile, registry, execution-target, or
capacity semantics change. Do not modify `internal/backend`,
`internal/capacity`, `internal/domain`, `engine.go`, `profiles.go`, or
`types.go` for this feature.
Add a root conversion in `convert.go`:
```go
func fromDomainProfileInspection(
inspection *domain.ProfileInspection,
) *ProfileInspection
```
The conversion must:
- return `nil` for a nil internal value;
- copy the scalar fields;
- convert the target through the existing `fromDomainExecutionTarget`; and
- therefore use the existing recursive `copyAnyMap` boundary for nested extra
parameters.
Do not add `APIKeyRequired` to the public `ExecutionTarget`. Keeping the
requirement on `ProfileInspection` preserves the existing stable JSON and
general execution-target contract.
### Shared Profile Selection
Add `internal/usecase/profile_inspection.go`. Define one private selection
value:
```go
type resolvedProfileSelection struct {
id string
profile *domain.ExecutionProfile
backend *domain.Backend
}
```
Add a private runner helper:
```go
func (r *Runner) resolveProfileSelection(
ctx context.Context,
profileID string,
) (*resolvedProfileSelection, error)
```
The helper must perform these operations in order:
1. trim surrounding whitespace from `profileID`;
2. reject a blank result with `ErrInvalidRequest`;
3. reject a nil runner profile repository with `ErrProfileLoad` rather than
panicking;
4. call the existing `profile.Repository.GetProfile` exactly once;
5. wrap every repository error with `ErrProfileLoad` while preserving the
underlying error with `%w`;
6. reject a nil profile returned without an error as `ErrProfileLoad`;
7. make a value copy of the selected profile before normalization so the
runner does not mutate repository-owned state;
8. trim the copied profile's backend ID;
9. when that ID is nonblank, resolve it exactly once through the existing
`BackendResolver`, preserving the current unknown-backend
`ErrProfileLoad` wrapping and backend ID context; and
10. return the normalized exact ID, copied profile, and optional defensive
backend value.
Do not inspect all sources, enumerate profiles, expose a source path, fall back
after a malformed higher-precedence match, or infer a backend from an endpoint
or model.
Refactor the profile-loading and backend-resolution block in
`Runner.resolvePreparation` to call `resolveProfileSelection`. Leave prompt
selection, prompt default-profile selection, prompt hashing, target overrides,
request credentials, output-contract resolution, artifact work, and all later
ordering where they currently occur.
This refactor must preserve:
- explicit request profile selection over prompt `default_profile`;
- the existing `ErrProfileRequired` result when neither exists;
- exact repository and backend lookup behavior;
- existing public not-found versus profile-load classification;
- request override precedence and target-presence tracking;
- credential checking during ordinary preparation; and
- current `Prepare`, `PrepareExecution`, `Run`, and `RunPrepared` behavior.
### Shared Target Resolution And Structural Validation
Continue using the existing `resolveExecutionTarget` for framework, backend,
profile, and optional request precedence. Do not duplicate or move the
individual merge rules into the inspection code.
Extract the two existing effective-target requiredness checks from
`resolvePreparation` into a private pure helper:
```go
func validateResolvedExecutionTarget(
target domain.ExecutionTarget,
) error
```
It checks only that the trimmed endpoint and model are nonblank and returns a
plain descriptive error. It does not validate URL syntax, contact the
endpoint, validate credentials, or introduce new parameter rules.
`resolvePreparation` calls this helper at the same current point: after
request override resolution and direct API-key assignment, and before
`validateAPIKey`. It wraps a failure with `ErrInvalidRequest`, preserving
ordinary preparation behavior.
Add the internal inspection method:
```go
func (r *Runner) InspectProfile(
ctx context.Context,
profileID string,
) (*domain.ProfileInspection, error)
```
It performs these operations:
1. trim and reject a blank ID as `ErrInvalidRequest`;
2. if the supplied context is already canceled, return an error wrapping both
`ErrProfileLoad` and `ctx.Err()` without touching the repository;
3. call `resolveProfileSelection`;
4. call `resolveExecutionTarget` with the selected backend, selected profile,
and a nil request override;
5. wrap any target-resolution error with `ErrProfileLoad`;
6. call `validateResolvedExecutionTarget` and wrap a failure with
`ErrProfileLoad`;
7. defensively clear `target.APIKey`;
8. copy `target.APIKeyRequired` into the result's `APIKeyRequired`; and
9. return the normalized profile ID and effective target.
Do not call `validateAPIKey`, `os.Getenv`, prompt repositories, artifact
readers, renderers, validators, capacity admission, output repair, or the
model client. Do not populate request target-presence state.
The internal `ExecutionTarget` may retain its private `APIKeyRequired` field;
the root conversion intentionally omits that private field from the public
target and publishes the separate inspection boolean.
### Root Facade And Error Mapping
`Engine.InspectProfile` follows the existing facade pattern:
1. reject a nil engine or nil runner with `ErrInvalidConfig`;
2. pass the context and string ID directly to `Runner.InspectProfile`;
3. map internal failures through the existing `mapPublicError`; and
4. convert a successful result with `fromDomainProfileInspection`.
No request conversion is needed. Do not add a public sentinel or typed error.
The existing error mapping already has the required ordering:
- an underlying `profile.ErrProfileNotFound` maps to
`ErrProfileNotFound` before the enclosing use-case `ErrProfileLoad` is
considered;
- other use-case `ErrProfileLoad` failures map to `ErrProfileLoad`; and
- `usecase.ErrInvalidRequest` maps to `ErrInvalidRequest`.
Do not reorder or otherwise change `errors.go` unless a focused test proves
that the existing mapping does not meet this plan. Preserve underlying
repository, backend, and context errors through `errors.Is`.
### Credentials, Ownership, And Concurrency
Inspection has no input through which a direct credential value can enter.
Backend and file-profile `APIKeyEnv` values remain names only. An in-memory
profile with `APIKeyRequired` clears an inherited backend environment name
through the existing target merge behavior.
The implementation must succeed for:
- a backend or profile naming an unset environment variable;
- a backend or profile naming an environment variable whose value is blank;
- an in-memory profile requiring a direct key when no key is supplied; and
- a profile requiring no credential.
The result expresses these effective states:
| `EffectiveModelParams.APIKeyEnv` | `APIKeyRequired` | Meaning |
| --- | --- | --- |
| nonblank | `false` | The profile resolves to the named environment source. |
| blank | `true` | A later execution must supply a direct key or explicit request environment override. |
| blank | `false` | The resolved target declares no credential requirement. |
The implementation must never produce a successful public result with both a
nonblank `APIKeyEnv` and `APIKeyRequired == true`.
Public ownership is enforced at the root conversion boundary. A consumer may
mutate the returned target and arbitrarily nested JSON-compatible extra
parameters without affecting:
- the engine registry or profile repository;
- a later `InspectProfile` call;
- `Prepare`, prepared execution, or `Run`; or
- another result already returned to a caller.
No new mutable engine state, cache, global registry, lock, or goroutine is
needed. Concurrency safety follows from the existing immutable registry and
repository contracts plus per-call values.
### Test Ownership
The root external-package contract suite in `public_contract_test.go` owns the
new public behavior. Add one focused test named:
Add focused internal tests in
`internal/usecase/profile_inspection_test.go`. Use small repository and backend
fakes already present in the package where practical; do not build a parallel
fixture framework.
```go
func TestLocalBackendConstructsAndRegistersConventionalBackend(t *testing.T)
```
The internal tests own:
The test must:
- blank-ID rejection;
- pre-canceled context classification without repository access;
- one exact profile and backend lookup;
- framework-default, backend, and profile target precedence through the
existing resolver;
- endpoint-only behavior;
- effective environment-name reporting without availability checks;
- direct-key-required behavior clearing an inherited backend environment
name;
- missing-profile and unknown-backend wrapping; and
- nil repository, nil returned profile, and invalid resolved target defenses
only if these cases are not already cheaply covered through existing runner
fakes.
1. call `promptkit.LocalBackend` with a test endpoint and a positive,
test-owned concurrency limit;
2. compare the returned value with this complete expected value:
Keep the internal matrix compact. Profile parser tests continue to own YAML,
duplicates, raw-key rejection, ranges, and source discovery. Backend tests
continue to own registration validation. Existing target tests continue to
own every merge field and numeric override boundary.
```go
promptkit.Backend{
ID: promptkit.BackendLocal,
Endpoint: endpoint,
ConcurrencyLimit: limit,
}
```
Add external-package public contract tests in `public_contract_test.go`. They
own:
A whole-value comparison is appropriate here because the exact zero-value
fields are part of this small public constructor's contract.
3. register that returned value with `WithBackend`;
4. add an in-memory profile whose `BackendID` is
`promptkit.BackendLocal`;
5. construct an engine through the existing contract-test prompt fixture;
6. call `Prepare`; and
7. assert that the prepared result exposes `BackendLocal` as the selected
backend and the supplied endpoint as the effective endpoint.
- the exported method and result shape through normal Go use;
- a nil engine returning `ErrInvalidConfig`;
- blank, missing, malformed, and unknown-backend public error identities,
including that not-found does not also match `ErrProfileLoad`;
- a pre-canceled inspection preserving both `ErrProfileLoad` and the context
error without consulting the profile repository;
- successful inspection with an absent credential environment value;
- no prompt dependency, demonstrated with an empty configured prompt
`fs.FS`;
- no model invocation, using the existing deterministic fake client;
- the three credential-requirement result states;
- an endpoint-only profile's empty backend ID;
- deep caller ownership of nested extra parameters across repeated
inspections; and
- representative equivalence between `InspectProfile.EffectiveModelParams`
and `Prepare.EffectiveModelParams` for the same engine, profile, and source
state with no request execution override.
This single test protects the realistic compatibility risks: accidental field
defaults, a changed conventional ID, failure to compose with `WithBackend`,
and accidental treatment of `"local"` as reserved. It also demonstrates that
the helper uses the existing backend/profile path.
Combine closely related assertions into a few readable behavioral tests.
Do not add a JSON golden test because `ProfileInspection` deliberately has no
stable JSON contract. Do not duplicate the complete repository-precedence,
target-field, parser-error, or credential-execution suites at the root layer.
Do not add separate tests for blank endpoints, malformed endpoints, negative
limits, queue defaulting, duplicate IDs, engine isolation, runtime capacity,
or caller mutation. Those mechanisms are unchanged and already have tests at
their owning boundaries. Do not add internal-package tests for this root
facade constructor.
Existing tests that must continue passing without semantic edits include:
### Consumer Documentation
- profile repository and built-in fallback tests;
- backend registry defensive-copy and lookup tests;
- execution-target precedence tests;
- `Prepare` and `Run` profile/backend equivalence tests;
- prepared-execution snapshot and credential tests; and
- public error mapping tests.
Update `docs/consumers/pkg-promptkit.md` after the API exists. Keep Go
declarations and GoDoc as the exact API owner; the guide should help consumers
choose a workflow and link to `backends.go` for precise semantics.
### Documentation Ownership
Restructure the backend guidance to present these paths in increasing order of
configuration:
After the implementation and public tests pass, update current-state
documentation:
1. **Endpoint-only profile.** Show a small in-memory `Profile` with
`Endpoint` and `Model`. Explain that this is the simplest choice when only
one profile needs the endpoint and shared backend identity or capacity
policy is unnecessary.
2. **Local convenience constructor.** Show
`WithBackend(promptkit.LocalBackend("http://localhost:8000/v1", 2))`
together with a profile using
`BackendID: promptkit.BackendLocal`. Explain briefly that the helper is
explicit, is not pre-registered, does not read environment variables, and
leaves the queue capacity at the existing default for a positive limit.
3. **Complete backend value.** Preserve an advanced example using a keyed
`Backend` literal for needs such as `APIKeyEnv`, an explicit
`QueueCapacity`, extra parameters, a custom ID, or multiple local
endpoints. Use a custom ID other than `"local"` in that example so the
distinction from the conventional helper is clear.
- `docs/consumers/pkg-promptkit.md`: add a concise task-oriented section near
profile selection showing `Engine.InspectProfile`, explaining when to use it
instead of a synthetic `Prepare`, how to interpret `APIKeyEnv` and
`APIKeyRequired`, and that credential enforcement timing remains
application policy. Link to the exact GoDoc rather than restating every
error and field contract.
- `docs/formats.md`: update profile selection and backend-membership wording
so exact inspection is recognized as another consumer of the existing
source and profile precedence. Do not redefine the exported method here.
- `docs/internal/runner.md`: describe the shared profile-selection boundary
and explain that inspection stops after structural target resolution,
before credential availability and all prompt-dependent work.
- `docs/internal/sources.md`: record that exact profile inspection performs
one point-in-time profile-source lookup without reading prompt, input, or
schema sources, and replace any ambiguous use of “inspection value” for
`PreparedRun` with “preparation value.”
- `docs/internal/overview.md`: add profile inspection to the existing root
facade and `internal/usecase` responsibility descriptions. Do not add a new
component or package row.
- `docs/roadmap/future.md`: remove the statement that profile inspection is in
active planning and leave the remaining unselected ideas intact.
- `docs/roadmap/notarius-promptkit-wishlist.md` and
`docs/roadmap/weatherreporter-promptkit-wishlist.md`: change the profile
inspection disposition from accepted planning to implemented behavior and
link to the durable consumer guidance or GoDoc rather than treating the
roadmap as current-state documentation.
- `docs/roadmap/profile-inspection.md`: change its status to `Complete` only
after the code, tests, current-state documentation, and full validation are
complete.
- `docs/roadmap/implementation.md`: change its status to `Complete` only after
every completion gate in this plan is satisfied.
Keep the existing backend-routing, selected-backend identity, concurrency,
credential, and error guidance unless a small wording adjustment is required
to make the new decision path coherent. Avoid repeating the complete field
contract or registry validation rules from GoDoc.
Do not update release guidance in this feature implementation. A later release
pass decides whether the change warrants a supplemental release document.
Do not add a new maintained example, README section, format-reference entry,
integration-contract change, internal-document change, or release note. The
consumer-guide snippets are sufficient for this small convenience API, and
none of those other documents owns the affected task or contract.
## Stage 1: Add The Public Constructor And Contract Test
**Status:** Complete.
## Stage 1: Implement Shared Internal Profile Resolution
### Objective
Add the smallest public API that expresses the accepted local-backend
convention and protect its compatibility through the root public boundary.
Add the internal inspection result and operation, share profile/backend
selection and structural target validation with ordinary preparation, and
prove the internal behavior without publishing the root API yet.
### Implementation Prompt
1. Re-read `docs/development.md`, all files under `docs/policy/`,
`local-backend.md`, `backends.go`, the backend-related portion of
`public_contract_test.go`, and the existing backend/concurrency GoDoc before
editing.
2. Confirm the working tree and preserve the uncommitted roadmaps and any
unrelated consumer changes.
3. Add the untyped exported string constant `BackendLocal = "local"` to
`backends.go` without changing `BackendOpenRouter`.
4. Add `LocalBackend(endpoint string, concurrencyLimit int) Backend` to
`backends.go` using the exact keyed-literal implementation in the fixed
design.
5. Write complete GoDoc for both declarations. Make their conventional,
explicit, non-built-in, non-reserved, and deferred-validation semantics
unambiguous.
6. Add
`TestLocalBackendConstructsAndRegistersConventionalBackend` to
`public_contract_test.go` exactly as specified under Test Ownership. Reuse
the existing contract prompt fixture rather than adding a fixture or test
helper.
7. Do not edit internal packages. If the constructor appears to require an
internal change, stop and reconcile the implementation with the fixed
transparent-constructor design instead.
Implement only Stage 1 of
`docs/roadmap/implementation.md`. Read the complete feature roadmap and the
implementation rules and fixed design above before editing.
1. Add `domain.ProfileInspection` to `internal/domain/domain.go` without
serialization tags.
2. Add `internal/usecase/profile_inspection.go` with
`resolvedProfileSelection`, `resolveProfileSelection`,
`validateResolvedExecutionTarget`, and `Runner.InspectProfile` exactly as
specified.
3. Refactor `Runner.resolvePreparation` in `internal/usecase/runner.go` to use
the shared selection and target-validation helpers while preserving its
current ordering, error classification, target overrides, credentials, and
results.
4. Add lean behavioral tests in
`internal/usecase/profile_inspection_test.go`.
5. Run the focused validation below and repair regressions before ending the
stage.
Do not add the root public type or method, update current-state documentation,
or alter profile formats, backend registration, credential availability,
capacity, model-client, or provider behavior in this stage.
### Focused Validation
Run:
```sh
gofmt -w backends.go public_contract_test.go
go test . -run '^TestLocalBackendConstructsAndRegistersConventionalBackend$'
go test .
go vet .
go build .
git diff --check
gofmt -w internal/domain/domain.go \
internal/usecase/profile_inspection.go \
internal/usecase/profile_inspection_test.go \
internal/usecase/runner.go
go test ./internal/usecase ./internal/profile ./internal/profile/builtin \
./internal/backend
go test ./internal/usecase -run \
'TestRunner(InspectProfile|Prepare|Run|PrepareExecution|RunPrepared)'
go vet ./internal/usecase ./internal/profile ./internal/backend
```
Inspect the diff and confirm that this stage changes only `backends.go`,
`public_contract_test.go`, and the already-present roadmap files.
### Completion Gate
Stage 1 is complete when:
Stage 1 is complete only when:
- the exported constant and constructor match the fixed API;
- the constructor returns only the three specified non-zero fields;
- the helper registers through the ordinary `WithBackend` path;
- `"local"` remains a valid consumer registration rather than a reserved
built-in;
- the focused public-contract test passes; and
- the root package test, vet, build, formatting, and whitespace checks pass.
- inspection reaches profile and backend resolution without any prompt or
execution collaborator;
- profile/backend selection is shared with ordinary preparation;
- target merging and requiredness checks are shared rather than duplicated;
- inspection does not check credential values or capacity;
- internal errors preserve the required identities;
- the ordinary preparation and execution tests still pass without weakened
assertions; and
- no root public API or current-state documentation claims the feature yet.
## Stage 2: Publish Consumer Guidance And Validate The Repository
**Status:** Complete.
## Stage 2: Publish The Root Facade And Public Contract
### Objective
Make the simplest suitable local-endpoint configuration easy to discover,
confirm the complete change across the repository, and close the temporary
roadmaps.
Expose the minimal caller-owned inspection API through `Engine`, preserve
public error and JSON compatibility, and protect the consumer-visible
contract.
### Implementation Prompt
1. Re-read the implemented declarations and GoDoc before describing them.
2. Update `docs/consumers/pkg-promptkit.md` according to the three-path
structure under Consumer Documentation.
3. Keep examples illustrative, minimal, secret-free, and consistent with the
implemented declarations. Link precise semantics to `backends.go` rather
than duplicating its field-by-field contract.
4. Follow every added or changed Markdown link and confirm its target exists.
Confirm that all local repository-relative links in
`local-backend.md`, this plan, and the changed consumer guide resolve.
5. Run the complete maintainer validation sequence below.
6. Inspect the final diff for accidental internal behavior changes,
generated artifacts, credentials, local workspace files, or module
replacements.
7. After every completion gate passes, set both stage statuses, this plan's
status, and the status in `local-backend.md` to `Complete`. Do not retire or
remove the roadmaps in the implementation change; roadmap retirement
follows implementation review.
Implement only Stage 2 of
`docs/roadmap/implementation.md` after Stage 1 satisfies its completion gate.
Re-read the fixed public API, error, credential, ownership, and test sections
before editing.
1. Add `ProfileInspection` and its exact GoDoc to `types.go` immediately after
`ExecutionTarget`. Do not add JSON tags or change `ExecutionTarget`.
2. Add `fromDomainProfileInspection` to `convert.go` using
`fromDomainExecutionTarget`.
3. Add `Engine.InspectProfile` and its exact GoDoc to `engine.go` immediately
before `Prepare`.
4. Update `Engine` GoDoc to include concurrent inspection.
5. Update the package GoDoc in `doc.go` for operation discovery, concurrency,
ownership, and the non-stable JSON classification.
6. Add compact external-package contract coverage in
`public_contract_test.go`, using existing fixtures and fakes where they
remain clear.
7. Confirm that the existing `errors.go` mapping meets the plan; do not change
it unless a required public identity test fails for a genuine mapping
reason.
8. Run the focused validation below and repair regressions before ending the
stage.
Do not add enumeration, request overrides, profile fingerprints, JSON
stability, prompt inspection, environment credential checks, caching, or
current-state prose documentation in this stage.
### Focused Validation
Run:
```sh
gofmt -w doc.go types.go convert.go engine.go public_contract_test.go
go test .
go test ./internal/usecase
go test . -run 'Test(InspectProfile|.*Profile.*PublicError|.*Profile.*Contract)'
go vet .
go build .
```
If the repository's actual focused test names differ, use the implemented test
names rather than weakening or skipping the intended assertions.
### Completion Gate
Stage 2 is complete only when:
- a consumer can call `Engine.InspectProfile` through the root package;
- the result contains only the normalized ID, caller-owned effective target,
and direct-key-required signal;
- no credential value can enter the result;
- environment, direct, and no-credential states are unambiguous;
- nil, blank, missing, malformed, unknown-backend, and cancellation errors
have the required public identities;
- not-found remains distinct from profile-load failure;
- the effective target matches ordinary preparation absent request overrides;
- repeated calls and caller mutation cannot alter engine-owned state;
- no stable JSON or new error contract was introduced; and
- existing public preparation, execution, and stable JSON tests remain
unchanged and passing.
## Stage 3: Update Documentation And Validate The Repository
### Objective
Make implemented profile inspection discoverable in its canonical
documentation, reconcile temporary roadmap state, and complete full repository
validation.
### Implementation Prompt
Implement only Stage 3 of
`docs/roadmap/implementation.md` after Stages 1 and 2 satisfy their completion
gates.
1. Update `docs/consumers/pkg-promptkit.md`, `docs/formats.md`,
`docs/internal/runner.md`, `docs/internal/sources.md`, and
`docs/internal/overview.md` according to the documentation ownership
section above.
2. Update the future catalog and both downstream wishlist dispositions so they
no longer describe profile inspection as merely accepted work.
3. Check every changed Markdown link and confirm its file and heading target.
4. Run the full validation sequence below.
5. Only after every check passes, set the feature roadmap and this
implementation plan to `**Status:** Complete.`
6. Re-run `git diff --check` after the status edits.
Do not add release notes, an example program, a new public package, or a
duplicate API reference. Keep detailed contracts in GoDoc and task-oriented
usage in the consumer guide.
### Full Validation
Run the complete sequence from `docs/development.md`:
Run from the repository root:
```sh
gofmt -w internal/domain/domain.go \
internal/usecase/profile_inspection.go \
internal/usecase/profile_inspection_test.go \
internal/usecase/runner.go \
doc.go types.go convert.go engine.go public_contract_test.go
gofmt -l $(git ls-files '*.go')
go test ./...
go test -race ./...
go vet ./...
go build ./...
go run ./examples/go-library/prepare
gofmt -l $(git ls-files '*.go')
git diff --check
```
The formatting command must produce no paths. Follow every added or changed
Markdown link and confirm its target and heading exist.
Also inspect:
```sh
git status --short
git diff --stat
git diff
```
Confirm that:
The `gofmt -l` command must print no paths. The maintained example must remain
offline and must not require a real credential or provider.
- production changes are limited to the root convenience API;
- no internal backend, registry, capacity, profile, or engine behavior
changed;
- `BackendLocal` is conventional and consumer-registerable, not built in or
reserved;
- `LocalBackend` performs no validation, normalization, environment lookup,
registration, allocation, or hidden default selection;
- the returned `Backend` leaves `QueueCapacity` nil so existing positive-limit
defaulting remains owned by the registry;
- existing endpoint-only profiles and complete custom backends remain
documented and supported;
- current-state documentation describes only the now-implemented API and
links to the canonical GoDoc for exact semantics;
- no `go.work`, `go.work.sum`, local module replacement, credential,
generated binary, or unrelated change was introduced; and
- the feature and implementation roadmaps contain no unresolved work marked
complete.
Inspect the final diff and confirm:
- only files required by this feature and pre-existing user changes are
present;
- no credential values, private infrastructure details, workspace files,
local replacements, generated binaries, or unrelated formatting changes
were added;
- the public declarations and GoDoc own exact API behavior;
- current-state documentation describes only implemented behavior and links
to canonical owners;
- roadmap documents contain future scope or completion status rather than a
duplicate current API reference; and
- no release, commit, or tag was created.
### Completion Gate
Stage 2 is complete when every target-end-state item in
`local-backend.md` is implemented, the consumer guide clearly presents all
three configuration paths, all complete validation commands pass, all changed
links resolve, and the roadmap statuses accurately report completion.
The implementation is complete only when:
## Implementation Handoff
The implementation handoff should report:
- the new `BackendLocal` and `LocalBackend` public API;
- that the helper remains explicit and composes with the ordinary backend
registry;
- the focused public-contract coverage added;
- the consumer-guide decision path added;
- the complete validation commands and results; and
- any unrelated working-tree changes that were preserved.
Do not claim that a local backend is built in, pre-registered, configured from
environment variables, or assigned a default model or concurrency limit.
- every Stage 1 and Stage 2 gate remains satisfied;
- the complete ordinary and race-enabled suites pass;
- vet, build, formatting, the maintained offline example, Markdown links, and
whitespace checks pass;
- consumer, format, internal, future, and wishlist documentation are
consistent with the implemented boundary;
- both roadmap statuses are `Complete`;
- the working tree contains no unintended files or changes; and
- the repository is ready for maintainer review without a commit or release
having been created by this plan.
## Open Questions
None. The feature roadmap and this plan fix the exported API, constructor
semantics, identity treatment, compatibility behavior, test boundary,
documentation ownership, implementation sequence, validation gates, and
non-goals required for implementation.
None. The accepted feature roadmap and the fixed decisions above fully specify
the implementation boundary.

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@@ -0,0 +1,358 @@
# Notarius PromptKit Wishlist
## Purpose
This document records features and interface changes that would be useful
additions to PromptKit from the perspective of the maintainers of Notarius, a
downstream application that consumes PromptKit.
PromptKit v0.3.0 provides the capabilities Notarius currently needs. None of
the ideas below blocks current Notarius development. They are opportunities to
reduce downstream workarounds, improve integration correctness, and make
PromptKit more ergonomic for applications with configuration validation,
debugging, checkpointing, and operational-observability requirements.
The examples are API sketches intended to communicate the desired capability,
not prescriptive names or finalized Go contracts.
## Priority 1: Atomic Execution With Prepared Details
**Disposition:** Covered by the accepted
[executable preparation handles](prepared-execution.md) roadmap. The shared
two-phase capability should provide the required single-preparation
consistency; a separate `RunDetailed` method is not cataloged initially.
### Downstream need
Notarius needs both:
- the completed `RunResult`; and
- the rendered messages, effective output contract, hashes, and other
preparation details exposed by `PreparedRun`.
Notarius uses the prepared details to construct redaction-aware debug bundles
and retain enough information to diagnose model behavior.
### Current integration
Notarius currently calls `Engine.Prepare` and then `Engine.Run` with the same
request. Because `Run` performs preparation internally, a successful request
resolves and prepares the same work twice.
This duplicates profile resolution, input hashing, schema loading, and prompt
rendering. It also creates a theoretical consistency window in which a
filesystem-backed prompt, profile, schema, or input could change between the
explicit preparation and the preparation performed by `Run`.
### Requested capability
Add an opt-in execution method that prepares exactly once and returns both the
prepared details and completed result:
```go
type RunReport struct {
Prepared PreparedRun
Result RunResult
}
func (e *Engine) RunDetailed(
ctx context.Context,
req RunRequest,
) (*RunReport, error)
```
The exact names are flexible. The important contract is that preparation
occurs once and that the returned prepared state describes the execution that
produced the returned result.
Existing `Prepare` and `Run` behavior should remain available for consumers
that need only one side of the operation.
### Design considerations
- Keep this API additive and preserve the existing simple `Run` workflow.
- Return caller-owned copies under PromptKit's existing ownership rules.
- Define whether any prepared details are available after an operational
generation or validation error. Notarius does not require partial results
for the initial use case, but an explicit contract would be valuable.
- Preserve cancellation and backend-admission semantics.
- Do not add all prepared content directly to `RunResult`. Rendered prompt
content can be large and sensitive, and consumers should opt in to receiving
it.
### Value to Notarius
This is the highest-value wishlist item. It would remove duplicate work from
every successful PromptKit-backed call and ensure that retained debug material
corresponds atomically to the actual execution.
## Priority 2: Prompt-Independent Profile Inspection
**Disposition:** Covered by the accepted
[prompt-independent profile inspection](profile-inspection.md) roadmap.
### Downstream need
Notarius validates configured pipeline profile IDs before beginning a run. It
needs to determine whether:
- a profile exists;
- its referenced backend is registered;
- its execution target can be resolved; and
- it declares a credential requirement that the application may need to
enforce.
This validation should not require model generation.
### Current integration
Notarius constructs a synthetic prompt using `testing/fstest.MapFS`, supplies a
dummy transcript, and calls `Engine.Prepare` solely to exercise profile and
backend resolution. This works, but prompt preparation is serving as a
substitute for a profile-inspection interface.
### Requested capability
Add a prompt-independent profile-resolution API, for example:
```go
type ResolvedProfile struct {
ProfileID string
BackendID string
EffectiveTarget ExecutionTarget
APIKeyEnv string
}
func (e *Engine) ResolveProfile(
ctx context.Context,
profileID string,
) (ResolvedProfile, error)
```
The returned shape may differ, but it should provide enough information for a
consumer to validate an explicit profile selection without inventing a prompt
or supplying placeholder inputs.
### Design considerations
- Resolve built-in, file-backed, and programmatic profiles using normal
PromptKit precedence.
- Validate that a referenced backend registration exists.
- Do not resolve, retain, or expose credential values.
- Report credential requirements, such as an environment-variable name, so
the consuming application can decide whether availability is required at
configuration-validation time or only at execution time.
- Return caller-owned values.
- Preserve typed or sentinel error classification for missing and invalid
profiles.
- Consider accepting an `ExecutionTargetOverride` if consumers need to inspect
the same effective target that a run-level override would produce.
- Enumeration of all profiles is not required for the Notarius use case; exact
lookup by ID is sufficient.
### Value to Notarius
This would eliminate a synthetic production-only prompt fixture and establish
a direct, supported contract for configuration-time profile and backend
validation.
## Priority 3: Semantic Execution-Target Fingerprints
**Disposition:** Deferred until prompt-independent profile inspection defines
the resolved target whose configuration identity would be fingerprinted.
### Downstream need
Notarius checkpoints model-backed pipeline stages. A checkpoint must not be
reused when generation-affecting PromptKit configuration changes.
Notarius therefore needs a stable equality signal for the effective profile
and backend target used by a pipeline.
### Current integration
Notarius currently constructs this identity itself from:
- a manually maintained marker for the PromptKit release and built-in profile
catalog;
- raw hashes of configured profile files; and
- a separate hash of the configured conventional local-backend endpoint.
This is safe but conservative and coupled to PromptKit details. Raw file
hashing also invalidates checkpoints for semantically irrelevant YAML changes,
such as comments or formatting.
### Requested capability
Expose an opaque semantic digest for a resolved profile and its effective
generation target. It could be returned by the proposed profile-resolution
API:
```go
type ResolvedProfile struct {
ProfileID string
BackendID string
EffectiveTarget ExecutionTarget
ExecutionDigest string
}
```
Alternatively, PromptKit could expose a dedicated method such as
`ProfileExecutionDigest(profileID)`.
### Desired equality semantics
The digest should change when generation-affecting state changes, including:
- resolved model and endpoint;
- backend routing identity;
- backend request defaults and extra parameters;
- profile generation parameters; and
- the semantic identity of any selected built-in profile.
The digest should not incorporate:
- credential values;
- concurrency or queue capacity;
- filesystem source paths;
- YAML comments or formatting; or
- other settings that affect scheduling or source representation without
changing the generation target.
The credential environment-variable name may need to participate if changing
it can select a materially different provider account or target. PromptKit
should define this deliberately while continuing to exclude the resolved
secret value.
### Design considerations
- Treat the digest as an opaque equality value rather than a public encoding
of internal structures.
- Document which categories of change affect equality.
- Include a versioned semantic marker internally so PromptKit can deliberately
invalidate old digests when its resolution semantics change.
- Prefer a per-profile digest over a digest of every profile known to an
engine. Notarius generally knows which profiles a resolved pipeline uses.
- Do not require consumers to know PromptKit's built-in catalog version.
### Value to Notarius
This would let Notarius remove its PromptKit release marker and raw
profile-source fingerprinting, reduce unnecessary checkpoint invalidation, and
delegate execution-target equality to the component that owns target
resolution.
## Priority 4: Structured Capacity Errors
**Disposition:** Accepted into the
[future catalog](future.md#structured-capacity-errors).
### Downstream need
Notarius translates PromptKit backend-capacity rejection into a
provider-neutral application error. When multiple backends are active,
operators would benefit from knowing which backend rejected admission without
parsing an error string or exposing endpoint details.
### Current integration
PromptKit provides the useful `ErrCapacityExceeded` sentinel. Notarius can
classify the failure reliably, but it retains only a sanitized diagnostic
string as additional context.
### Requested capability
Add a typed error that continues to match `ErrCapacityExceeded`:
```go
type CapacityError struct {
BackendID string
}
func (e *CapacityError) Is(target error) bool {
return target == ErrCapacityExceeded
}
```
The exact implementation may use `Unwrap` or another idiomatic mechanism. The
important properties are compatibility with `errors.Is` and discoverability
through `errors.As`.
### Design considerations
- Include the stable backend ID.
- Do not expose the backend endpoint, credential environment, credential
value, request content, or other sensitive configuration.
- Consider including the configured concurrency and queue limits if they are
useful and safe, but backend identity alone provides most of the downstream
value.
- Add a retry delay only if PromptKit can provide a meaningful value. A full
queue does not necessarily imply a reliable `Retry-After` duration.
- Keep retry and backoff policy with the consuming application. PromptKit
should classify the admission failure rather than silently retry it.
### Value to Notarius
This would improve operational diagnostics and future metrics while preserving
the provider-neutral error boundary used by Notarius.
## Capabilities PromptKit Already Provides Well
The current PromptKit boundary is sufficient for Notarius's implemented
behavior. In particular, PromptKit already provides:
- filesystem, `fs.FS`, and programmatic prompt, profile, and schema sources;
- offline preparation without model execution;
- structured output and content validation;
- direct session propagation;
- tri-state per-run reasoning overrides;
- selected profile, backend, model, endpoint, effective parameters, hashes, and
token-usage provenance;
- endpoint-only profiles;
- the conventional `local` backend helper;
- arbitrary engine-scoped `Backend` registrations;
- backend authentication environment names, extra parameters, concurrency
limits, and queue-capacity policies;
- provider-client and artifact-reader extension interfaces;
- context cancellation; and
- useful public error sentinels, including profile absence and capacity
exhaustion.
The wishlist does not imply that Notarius needs PromptKit to broaden its core
responsibilities. It primarily asks for more direct access to information and
operations that PromptKit already computes internally.
## Responsibilities That Should Remain In Notarius
The following concerns belong to the downstream application and should not
move into PromptKit for the sake of Notarius:
- pipeline staging, dependencies, and generated references;
- application-wide scheduling across providers and backends;
- module and validation retry policy;
- checkpoints, resume, and recomputation;
- durable run artifacts and manifests;
- D&D prompts, schemas, extractors, validators, and normalizers;
- Notarius configuration-file parsing and precedence;
- domain-specific prompt-cache prefix policy; and
- application-specific redaction, retention, and debug-bundle policy.
PromptKit's complete `Backend` API already supports custom IDs, multiple local
endpoints, authentication, extra parameters, and explicit queue policies.
Whether Notarius exposes those capabilities in its own configuration is an
application-policy decision, not an upstream PromptKit gap.
## Suggested Upstream Sequence
If the PromptKit team chooses to pursue these ideas, the most useful order for
Notarius would be:
1. Add atomic execution that returns prepared details and the completed result.
2. Add prompt-independent profile inspection.
3. Add a semantic execution-target digest, preferably as part of profile
inspection.
4. Add a typed capacity error carrying backend identity.
The first two address concrete workarounds in current Notarius code. The third
would improve checkpoint correctness and reduce coupling. The fourth is
operational polish.

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# Executable Preparation Handles
**Status:** Complete.
## Purpose
Allow a consumer to prepare one exact Promptkit execution, inspect and retain
its credential-redacted public preparation details, and later execute that
already-prepared work without resolving or rendering the request again.
This provides a supported preflight-before-generation boundary for
[Weatherreporter](weatherreporter-promptkit-wishlist.md#priority-1-executable-preparation-handles)
and removes the duplicate `Prepare`-then-`Run` workaround described by
[Notarius](notarius-promptkit-wishlist.md#priority-1-atomic-execution-with-prepared-details).
## Motivation
`Engine.Prepare` currently returns the provenance and rendered details that
consumers need for debugging, persistence, and preflight checks. `Engine.Run`
then performs its own preparation before generation. A consumer that needs
both values must therefore prepare the same logical request twice.
That workaround duplicates source loading, input hashing, schema work, and
template rendering. It also permits filesystem-backed prompts, profiles,
schemas, or inputs to change between the public preparation and the
preparation that actually produces the result.
Promptkit already owns the complete preparation and execution pipeline. An
opt-in prepared-execution handle should expose the missing boundary without
putting rendered content into every `RunResult` or moving persistence policy
into the library.
## Consumer Workflow
The target public workflow is:
```go
prepared, err := engine.PrepareExecution(ctx, request)
if err != nil {
// Handle preparation failure.
return
}
defer prepared.Discard()
details := prepared.Details()
// Persist or inspect a consumer-selected safe subset of details.
result, err := engine.RunPrepared(ctx, prepared)
```
The target public surface is:
```go
type PreparedExecution struct {
// Opaque Promptkit-owned state.
}
func (e *Engine) PrepareExecution(
ctx context.Context,
req RunRequest,
) (*PreparedExecution, error)
func (p *PreparedExecution) Details() PreparedRun
func (p *PreparedExecution) Discard()
func (e *Engine) RunPrepared(
ctx context.Context,
prepared *PreparedExecution,
) (*RunResult, error)
```
The declarations and GoDoc will own the exact implemented contract. The
important public shape is an opaque handle, caller-owned `PreparedRun`
details, an explicit discard operation, and execution through the engine that
created the handle.
## Prepared Snapshot
`PrepareExecution` performs complete preparation without model generation or
backend-capacity admission. It applies the same request validation, source
precedence, backend and profile resolution, credential requirement checks,
output-contract resolution, artifact loading, hashing, schema loading,
session resolution, and rendering behavior as `Prepare`.
A successful handle freezes all source-derived state required for later
execution, including:
- the selected prompt definition, profile, and backend identity;
- the complete effective execution target and request-field presence;
- rendered messages and effective session ID;
- prompt, rendered-prompt, and input hashes;
- the effective output contract and provider-facing structured-output
constraint; and
- private validation state sufficient to validate generated output without
reopening schema files or `fs.FS` resources, including required schema
references.
After `PrepareExecution` succeeds, changes to prompt, profile, schema, input,
or request-owned data cannot change what `RunPrepared` sends to the model or
how it validates the generated output.
The handle retains an internal snapshot independent from values returned by
`Details`. Mutating a returned `PreparedRun`, its maps, slices, messages, or
schema values does not affect later execution. Each `Details` call returns a
fresh caller-owned copy under the existing `PreparedRun` ownership and stable
JSON rules.
## Handle Lifecycle
A `PreparedExecution` is:
- created only by a successful `PrepareExecution` call;
- bound to the exact `Engine` that created it;
- valid for one `RunPrepared` invocation;
- safe for repeated `Details` calls;
- intentionally opaque and without a supported JSON representation; and
- in-process state rather than a durable or restartable job.
`RunPrepared` atomically claims a valid handle before beginning the execution
attempt. A second or concurrent invocation fails without starting another
execution, including when the first invocation ended in cancellation, capacity
rejection, generation failure, or operational validation failure. Copies of
the public handle share the same one-attempt state and cannot bypass this rule.
A nil, zero-value, foreign-engine, discarded, already-claimed, or already-used
handle is invalid. `RunPrepared` reports these lifecycle errors through the
ordinary public invalid-request category. A failed foreign-engine invocation
does not consume a handle that remains valid for its owning engine.
`Discard` idempotently makes an unclaimed handle unavailable for execution and
drops Promptkit's references to secret-bearing or execution-only state.
`RunPrepared` performs the same cleanup automatically after claiming a handle.
Credential-redacted public preparation details remain available after discard,
success, or failure so consumers can retain diagnostics. Promptkit does not
promise secure erasure of Go string memory.
Lifecycle transitions are concurrency-safe. When `RunPrepared` and `Discard`
race, exactly one claims the ready handle. `Discard` is not an execution
cancellation mechanism and does not interrupt an attempt that has already
claimed the handle; consumers cancel that attempt through its context.
## Credentials And Sensitive Data
`Details` has the same security contract as `PreparedRun`: it can contain
rendered messages, schemas, identifiers, and hashes, but never a resolved API
key value. Consumers remain responsible for selecting, redacting, storing, and
retaining any persisted preparation material.
A direct `RunRequest.APIKey` is retained only in opaque execution state until
the handle is run or discarded. It is never added to details, hashes, JSON,
`String`, or `GoString` output.
An environment-variable name is frozen as part of the effective target, but
its credential value is not captured for the lifetime of the handle.
`PrepareExecution` applies the existing preparation-time availability check.
`RunPrepared` rechecks availability before admission, and the selected model
client uses the environment value visible during execution. This preserves
current secret ownership and avoids retaining an environment credential while
a consumer persists preflight material.
The opaque handle must not expose retained request data or credentials through
default formatting, JSON, or error messages.
## Admission, Cancellation, And Execution
`PrepareExecution` never reserves backend admission or an active-generation
permit. Its context governs preparation only; cancellation after it returns
does not invalidate the handle.
`RunPrepared` uses its own context for credential revalidation, backend
admission, active-generation waiting, model generation, output validation, and
any internal repair. Admission occurs when `RunPrepared` begins so a consumer
cannot occupy bounded capacity while inspecting or persisting preparation
details.
For a limited backend, the admission lease covers the complete prepared
execution attempt after admission: generation, validation, internal repair,
and every success or failure exit. Actual generation continues to use the
backend's FIFO active-generation permit. Existing capacity error identity,
cancellation behavior, and release guarantees remain in force.
Because a prepared handle is one-attempt, cancellation or capacity rejection
does not make it reusable. Retry and backoff policy remains with the consumer,
which may create a new prepared handle when another attempt is appropriate.
## Results And Failures
On success, `RunPrepared` returns the existing caller-owned `RunResult`. Its
source-derived provenance must match `Details`, including prompt identity and
hash, rendered-prompt hash, session ID, selected profile and backend,
effective target, and input hashes.
`RunResult.StartTime`, `EndTime`, and `Duration` describe the
`RunPrepared` execution attempt. They exclude preparation time and any delay
while the consumer retained the handle. Preparation timing remains in
`PreparedRun`.
Preparation failure returns no handle. After successful preparation,
`RunPrepared` retains the existing rule that an operational failure returns no
partial `RunResult`; the consumer already has independent preparation details.
A completed content-validation failure remains a successful result with
`ValidationFailed`.
`PrepareExecution` preserves the public error categories of `Prepare`.
`RunPrepared` preserves applicable invalid-request, credential, capacity,
generation, validation, collaborator, and cancellation identities without
reintroducing source-loading or rendering failures from frozen state.
## Compatibility And Existing Workflows
This feature is additive:
- `Prepare` remains the simple preparation-only operation;
- `Run` remains the simple prepare-and-execute operation with its current
early-admission and error-ordering behavior;
- `PreparedRun` and `RunResult` retain their existing stable JSON
representations;
- model-client and artifact-reader extension interfaces remain unchanged; and
- backend routing, concurrency limits, queue capacities, and provider wire
behavior remain unchanged.
The new workflow may share internal machinery with `Prepare` and `Run`, but it
must not change their observable behavior merely to simplify implementation.
## Documentation
The completed documentation set has these ownership boundaries:
- exported declarations and GoDoc own the exact handle, method, lifecycle,
ownership, concurrency, credential, error, and cancellation contracts;
- the promptkit consumer guide explains when to use `Prepare`, `Run`, or the
two-phase prepared-execution workflow; and
- internal runner, source-validation, capacity, and model-client documentation
describe the implemented collaborator boundaries without duplicating public
contracts.
No release document is part of the feature implementation itself. Release
guidance is prepared only when the resulting public API is selected for
publication.
## Non-Goals
This work does not include:
- serializable, durable, resumable, or cross-process execution handles;
- reuse for multiple consumer-initiated executions;
- concurrent execution of one handle;
- capacity reservation during preparation;
- a background task queue, priorities, worker lifecycle, or job status;
- retry, backoff, or provider failover policy;
- a separate `RunDetailed` convenience method;
- adding preparation details or rendered messages to every `RunResult`;
- prompt or profile inspection APIs;
- structured capacity or generation errors;
- freezing environment-variable credential values for the handle lifetime;
- snapshotting provider state or mutable behavior inside an injected
`LLMClient`;
- allowing target, validation, session, variable, or input overrides after
preparation; or
- changing existing `Prepare`, `Run`, file-format, provider-request, or stable
JSON contracts.
## Target End State
After this work:
- consumers can perform and persist preflight before starting provider work;
- one prepared handle executes exactly the source-derived prompt, target,
schema, inputs, session, and messages described by its public details;
- execution never reloads or rerenders consumer sources;
- direct credentials remain confined to opaque, explicitly discardable state;
- environment credentials are not retained across the preflight boundary;
- backend capacity is reserved only when execution begins;
- one handle can start at most one execution attempt, including any internal
repair calls owned by that attempt;
- preparation details remain available after execution success or failure;
- existing simple `Prepare` and `Run` consumers remain unaffected; and
- Promptkit continues to own reusable execution mechanics without taking on
downstream persistence, redaction, retry, or job-management policy.

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# Prompt-Independent Profile Inspection
**Status:** Accepted.
## Purpose
Allow consumers to look up one execution profile by ID and inspect its
structurally resolved model target without selecting a prompt, supplying
placeholder inputs, checking credential availability, or invoking a model.
This provides a direct configuration-validation boundary for
[Notarius](notarius-promptkit-wishlist.md#priority-2-prompt-independent-profile-inspection)
and
[Weatherreporter](weatherreporter-promptkit-wishlist.md#priority-3-prompt-independent-profile-inspection).
## Motivation
Both downstream consumers need to reject invalid configured profile IDs before
starting application work. They currently have to construct a synthetic prompt
and call `Engine.Prepare` merely to exercise profile loading, backend lookup,
and execution-target resolution.
That workaround couples profile validation to unrelated prompt definitions,
fixture inputs, rendering, schema behavior, and current credential
availability. Promptkit already owns profile precedence, backend membership,
and target resolution, so it should expose that cohesive capability directly.
## Consumer Workflow
The target public workflow is:
```go
inspection, err := engine.InspectProfile(ctx, profileID)
if err != nil {
// Reject or report the configured profile.
return
}
target := inspection.EffectiveModelParams
if target.APIKeyEnv != "" {
// Apply application policy for the named environment variable.
}
```
The target public surface is:
```go
type ProfileInspection struct {
ProfileID string
EffectiveModelParams ExecutionTarget
APIKeyRequired bool
}
func (e *Engine) InspectProfile(
ctx context.Context,
profileID string,
) (*ProfileInspection, error)
```
The declarations and GoDoc will own the exact implemented contract. The
important public shape is exact lookup through the existing engine, one
caller-owned inspection value, the resolved `ExecutionTarget`, and an explicit
signal for a direct API-key requirement.
`EffectiveModelParams.BackendID` identifies the selected registered backend
and remains empty for endpoint-only profiles.
`EffectiveModelParams.APIKeyEnv` reports the effective credential environment
variable name. `APIKeyRequired` reports that the profile requires a direct
request credential instead. These states are mutually exclusive after normal
profile and backend precedence is applied.
`ProfileInspection` does not need a stable JSON representation. Consumers that
persist application configuration or diagnostics can select the fields their
own format requires.
## Lookup And Precedence
`InspectProfile` requires a non-blank explicit profile ID. It trims surrounding
whitespace and otherwise performs the same case-sensitive exact lookup used by
ordinary execution.
Lookup applies the engine's normal profile-source precedence:
- programmatic profiles supplied through `WithProfiles`;
- the configured file, directory, or `fs.FS` profile source; and
- the built-in profile catalog.
A valid higher-precedence match shadows a lower-precedence profile with the
same ID. A malformed or unreadable higher-precedence match fails rather than
silently falling back. The
[profile format reference](../formats.md#profile-definitions) remains the
canonical owner of profile-source and file-format behavior.
Inspection never derives a profile ID from a prompt's `default_profile`; the
caller is inspecting one explicitly named profile.
## Structural Resolution
Inspection loads and validates the selected profile, verifies that a named
backend exists in the engine's immutable backend registry, and applies normal
framework-default, backend, and profile precedence to produce the effective
target.
For the same engine state and profile ID, with no per-run execution override,
the inspected target must match the target that ordinary preparation would
resolve before applying request credentials and checking their availability.
This equivalence must use one shared resolution path rather than a second set
of precedence rules.
Structural resolution includes:
- backend routing identity;
- endpoint and model;
- sampling, token, timeout, service-tier, and reasoning settings;
- the effective credential environment-variable name or direct-key
requirement; and
- deeply copied provider-specific extra parameters.
Inspection returns the effective target rather than a raw profile definition.
This keeps framework and backend defaults visible to consumers without
creating a second public profile-loading interface.
The result does not include request-override presence because no
`ExecutionTargetOverride` participates in inspection.
## Credentials And Sensitive Data
Inspection reports credential requirements but never resolves, retains, or
returns a credential value.
The operation does not read the named environment variable and succeeds when
that variable is absent or blank. It accepts neither a direct API key nor an
API-key environment override. Consumers decide whether credential availability
must be enforced during application configuration, while `Prepare`,
`PrepareExecution`, `Run`, and `RunPrepared` retain their execution-time
credential contracts.
Error messages, formatting, and returned values must not expose environment
values or other resolved secrets. Existing restrictions against raw API keys
in profile sources remain unchanged.
## Ownership, Consistency, And Concurrency
Each successful call returns a caller-owned snapshot. Mutating the returned
target or any nested extra-parameter map or slice cannot affect the engine,
later inspection, or later execution.
Inspection is safe to call concurrently under the engine's existing immutable
registry and repository contracts. It does not mutate profile sources or
cache a result globally.
For filesystem-backed sources, an inspection describes the state observed by
that call. It does not freeze the profile for a later `Run`; a source may
change between operations. Consumers requiring an exact preflight-to-execution
snapshot should use the existing prepared-execution workflow.
## Errors And Cancellation
The operation uses existing public error categories:
- a blank profile ID matches `ErrInvalidRequest`;
- an absent exact ID matches `ErrProfileNotFound` and not `ErrProfileLoad`;
- read, decode, validation, and source-selection failures match
`ErrProfileLoad`; and
- an unknown referenced backend or an invalid structurally resolved target
matches `ErrProfileLoad`.
Errors should preserve useful underlying collaborator and context identities
through `errors.Is` where the existing facade does so, without exposing
internal package types. Context cancellation governs inspection and no partial
inspection result is returned on failure.
Missing credential values are not inspection errors. The operation cannot
return capacity or model-generation failures because it performs neither
backend admission nor generation.
## Compatibility And Boundaries
This feature is additive. Existing profile formats, source precedence,
backend registration, `Prepare`, prepared execution, and `Run` behavior remain
unchanged.
The method belongs on the root `Engine` facade. Profile repositories and the
backend registry remain internal implementation details, and no new public
repository interface is introduced.
Inspection does not require prompt lookup, rendering, artifact loading, schema
loading, validation, backend-capacity admission, or model-client access.
Engine construction retains its ordinary configuration requirements; this
feature does not introduce a separate profile-only engine.
## Documentation
The completed documentation set has these ownership boundaries:
- exported declarations and GoDoc own the exact method, result, ownership,
credential, error, and cancellation contracts;
- the promptkit consumer guide explains configuration-time profile inspection
and distinguishes it from `Prepare` and prepared execution;
- the profile format reference continues to own profile fields and source
precedence; and
- internal documentation describes shared profile and target resolution
without duplicating public contracts.
## Non-Goals
This work does not include:
- enumerating or searching profiles;
- returning raw profile definitions or profile source paths;
- accepting per-run execution overrides, direct API keys, or API-key
environment overrides;
- checking environment-variable contents or other credential availability;
- semantic execution-target fingerprints or profile hashes;
- prompt-definition inspection or prompt default-profile resolution;
- full-corpus validation across every profile source;
- freezing a filesystem-backed profile for later execution;
- exposing backend concurrency limits, queue state, or capacity policy;
- model generation, provider health checks, or endpoint connectivity tests;
- dynamic backend or profile registration after engine construction; or
- changing current profile, backend, prepared-execution, or stable JSON
contracts.
## Target End State
After this work:
- consumers can validate one configured profile without inventing a prompt or
placeholder inputs;
- lookup observes ordinary programmatic, configured-source, and built-in
precedence;
- a successful result proves that the profile exists, is valid, references a
registered backend when applicable, and resolves to a structurally valid
effective target;
- the inspected target matches ordinary preparation for the same profile and
engine state before per-run overrides and credential availability checks;
- credential requirements are visible without reading or exposing credential
values;
- returned targets and nested data are caller-owned;
- inspection performs no rendering, source loading unrelated to the profile,
capacity admission, or model work;
- existing execution workflows and compatibility contracts remain unchanged;
and
- Promptkit owns reusable profile validation while downstream applications
retain configuration policy, persistence, logging, and credential-timing
decisions.

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# Weatherreporter PromptKit Wishlist
## Purpose
This document records features and interface changes that would be useful
additions to PromptKit from the perspective of the maintainers of
Weatherreporter, a downstream application planning to replace its Scriptorium
CLI integration with PromptKit.
PromptKit v0.3.0 provides the capabilities Weatherreporter needs for the
migration. None of the ideas below is a hard adoption requirement. They are
opportunities to avoid duplicate preparation, validate configuration earlier,
improve durable failure diagnostics, and make the integration more direct.
The examples are API sketches intended to communicate the desired capability,
not prescriptive names or finalized Go contracts. The related
[Notarius PromptKit wishlist](notarius-promptkit-wishlist.md) proposes several
overlapping features from another downstream consumer's perspective.
## Priority 1: Executable Preparation Handles
**Disposition:** Accepted into the
[executable preparation handles](prepared-execution.md) feature roadmap.
### Downstream need
Weatherreporter treats prompt preparation as a durable preflight boundary. It
needs to:
1. prepare the exact request that will be executed;
2. persist a safe preparation record before starting the provider call; and
3. execute without reloading or rerendering prompt, profile, schema, or input
sources.
Persisting preflight before generation leaves useful evidence when a provider
call fails or the process is interrupted during generation.
### Current integration option
With PromptKit v0.3.0, Weatherreporter can call `Engine.Prepare`, save selected
fields from the returned `PreparedRun`, and then call `Engine.Run` with the
same request. Because `Run` performs preparation internally, the work is
repeated.
Weatherreporter plans to use embedded prompt and schema files plus immutable
inline input bytes, which removes most of the consistency risk. An external
profile file or directory can still change between the two calls, and the
second preparation remains unnecessary work.
The atomic `RunDetailed` operation proposed by the
[Notarius wishlist](notarius-promptkit-wishlist.md#priority-1-atomic-execution-with-prepared-details)
would guarantee that returned preparation details describe the completed
execution. However, returning those details only after generation would not
preserve Weatherreporter's preflight-before-generation persistence boundary.
### Requested capability
Add an opt-in two-phase API that returns a prepared execution handle:
```go
prepared, err := engine.PrepareExecution(ctx, request)
if err != nil {
// Handle preparation failure.
}
details := prepared.Details()
// Persist a consumer-selected safe preparation record.
result, err := engine.RunPrepared(ctx, prepared)
```
The exact names and shapes are flexible. The important contract is that
`RunPrepared` executes the already prepared prompt and does not reload or
rerender its prompt, profile, schema, or input sources.
`Details` should return the same caller-owned public preparation information
currently represented by `PreparedRun`. The execution handle may retain opaque
engine-owned state needed to invoke the model and validate the response.
### Design considerations
- Keep `Prepare` and `Run` available for consumers that do not need a
two-phase execution boundary.
- Bind a prepared handle to the engine that constructed it.
- Define whether a handle is one-shot, reusable, or safe for concurrent use.
A one-shot contract may be the safest initial design.
- Do not give the opaque handle a stable JSON representation.
- Do not expose or serialize resolved credential values through `Details`.
- Define how a direct request API key is retained and released when an opaque
handle must carry it until execution.
- Preserve caller-owned copies for all public details.
- Make context cancellation and backend admission timing explicit.
- Document whether profile credential environment values are resolved during
preparation or execution.
- Ensure an execution error does not invalidate the public details already
returned to the consumer.
- Consider whether an atomic `RunDetailed` can share the same internal
prepared-execution implementation.
### Value to Weatherreporter
This is the highest-value upstream addition. It would preserve
Weatherreporter's durable preflight behavior, remove duplicate work, eliminate
the remaining source-consistency window, and ensure that persisted provenance
describes the actual execution.
## Priority 2: Prompt-Definition Inspection
**Disposition:** Accepted into the
[future catalog](future.md#prompt-definition-inspection).
### Downstream need
Weatherreporter has a fixed registry of seven report definitions. Each report
selects a prompt ID and one of two output workflows:
- direct Markdown; or
- structured generated text followed by application-owned domain validation
and Markdown template rendering.
Weatherreporter will embed the PromptKit prompt definitions and private
response schemas that implement those reports. It needs to validate that the
report registry and embedded prompt corpus agree before weather collection or
provider execution.
### Current integration option
Weatherreporter can maintain synthetic data-package fixtures and call
`Engine.Prepare` for every report prompt during tests. Runtime validation can
also occur through the ordinary per-report preparation stage.
This works, but it requires complete placeholder inputs and profile resolution
when the application primarily wants to inspect prompt identity and declared
contracts.
### Requested capability
Add exact prompt-definition lookup without rendering or generation:
```go
type PromptInfo struct {
PromptID string
PromptVersion string
PromptHash string
DefaultProfileID string
Inputs []InputDefinition
OutputContract OutputContract
}
func (e *Engine) ResolvePrompt(
ctx context.Context,
promptID string,
promptVersion string,
) (PromptInfo, error)
```
The exact returned shape may differ. Weatherreporter needs enough information
to verify prompt existence, version selection, declared inputs, default
profile identity, output format, validation mode, and schema selection without
supplying synthetic prompt input.
### Design considerations
- Use ordinary PromptKit prompt-source precedence and exact ID/version
selection.
- Fully load and structurally validate the selected prompt definition.
- Validate referenced prompt content files without rendering their templates.
- Resolve and validate the selected output contract and schema reference where
practical.
- Return an opaque prompt-definition equality value rather than raw source
bytes.
- Do not return rendered messages, schema bodies, profile credentials, or
another source of sensitive content.
- Preserve typed or sentinel errors for missing and invalid prompts.
- Return caller-owned values.
- Enumeration of all known prompts is not required for Weatherreporter; exact
lookup is sufficient.
### Value to Weatherreporter
This would let Weatherreporter directly verify that every report prompt
exists, requires the curated `data_package` input, and declares the expected
Markdown or JSON Schema output contract. It would reduce synthetic test setup
and move failures ahead of weather collection.
## Priority 3: Prompt-Independent Profile Inspection
**Disposition:** Covered by the accepted
[prompt-independent profile inspection](profile-inspection.md) roadmap.
### Downstream need
Weatherreporter will allow operators to select an external PromptKit profile
source and may allow an explicit profile override. It should reject a missing
profile, unknown backend, malformed execution target, or unsatisfied credential
requirement before collecting weather data or writing report artifacts.
### Current integration option
Weatherreporter can validate an explicit profile by preparing one embedded
prompt with fixture input. Prompts that use their own default profiles can be
validated during their normal preparation stage.
This couples configuration validation to one prompt and requires placeholder
input even when only profile and backend resolution are relevant.
### Requested capability
The prompt-independent `ResolveProfile` API proposed by the
[Notarius wishlist](notarius-promptkit-wishlist.md#priority-2-prompt-independent-profile-inspection)
would satisfy this need. It should resolve built-in, file-backed, and
programmatic profiles, validate backend membership, report credential
requirements without resolving credential values, and preserve typed error
classification.
### Additional Weatherreporter considerations
- An explicit application profile override should be inspectable without
selecting a report prompt.
- A prompt-definition inspection result may expose its default profile ID so
Weatherreporter can inspect that profile separately.
- Inspection should distinguish structural profile validity from current
credential availability so configuration validation can apply explicit
application policy.
- An optional execution-target override should be considered only if it
describes the same target that a later run will use.
### Value to Weatherreporter
This would improve fail-fast configuration validation and give operator-facing
errors direct profile and backend context. It is valuable but not required for
the initial migration.
## Priority 4: Eager Source Validation
**Disposition:** Deferred until prompt and profile inspection have been used
to determine whether a broader engine-wide validation operation is still
needed.
### Downstream need
PromptKit deliberately defers reading and validating filesystem and `fs.FS`
prompt, profile, and schema content until a request needs it. Weatherreporter
has a small fixed embedded prompt corpus and one optional external profile
source. It would benefit from an explicit offline validation operation for
tests, startup diagnostics, and configuration checks.
### Current integration option
Weatherreporter can prepare every report prompt with fixture inputs and inspect
any explicit profiles individually. That provides strong coverage but requires
consumer-maintained traversal and synthetic material.
### Requested capability
Consider an opt-in source-validation operation:
```go
type SourceValidationOptions struct {
RequireCredentials bool
}
func (e *Engine) ValidateSources(
ctx context.Context,
opts SourceValidationOptions,
) error
```
The operation should eagerly discover and structurally validate the configured
prompt, profile, and schema sources without model generation.
### Design considerations
- Keep deferred validation as the normal `NewEngine` behavior.
- Make eager validation an explicit consumer choice.
- Validate duplicate IDs and versions, strict YAML decoding, referenced content
files, profile/backend membership, schema syntax, and schema references.
- Distinguish structural credential declarations from current environment
availability.
- Do not read or expose credential values when credential availability is not
requested.
- Preserve source-specific public error identities and useful path context.
- Respect context cancellation during filesystem discovery and schema work.
- Consider whether exact prompt and profile inspection APIs already provide a
smaller sufficient surface before adding an engine-wide operation.
### Value to Weatherreporter
This would simplify offline corpus checks and catch malformed operator profile
sources before report work begins. It is helpful but lower priority than exact
prompt and profile inspection.
## Priority 5: Structured Generation Errors
**Disposition:** Deferred pending stronger downstream demand and a narrower
design that does not duplicate prepared provenance or impose HTTP-specific
fields on injected model clients.
### Downstream need
Weatherreporter preserves redacted, inspectable failure receipts for report
runs. When model generation fails operationally, it needs to classify the
failure and retain safe execution context without parsing error prose.
Prompt preparation already supplies selected profile, backend, and model
identity. Provider status classification would add useful operator context,
especially when the built-in OpenAI-compatible client receives a non-success
HTTP status.
### Current integration option
PromptKit exposes `ErrLLMGenerate` and preserves injected client errors through
`errors.Is`. Weatherreporter can reliably classify generation failure and use
its preparation record for profile, backend, and model provenance. Any further
diagnostic detail remains a redacted error string.
### Requested capability
Consider a typed generation error that continues to match `ErrLLMGenerate`:
```go
type GenerationError struct {
BackendID string
Model string
StatusCode int
}
```
The exact fields may differ. The useful contract is safe structured context
available through `errors.As`, while `errors.Is(err, ErrLLMGenerate)` remains
compatible.
### Design considerations
- Include only fields that PromptKit knows reliably and can expose safely.
- Treat an HTTP status as optional because injected model clients may not use
HTTP.
- Do not expose provider response bodies, endpoints, credential environment
names, credential values, request content, or generated content.
- Do not make a structured error a second source of prompt/profile provenance
already present in a prepared execution.
- Preserve injected client error identity.
- Keep retry and backoff policy with the consuming application.
### Value to Weatherreporter
This would improve durable failure receipts and troubleshooting, particularly
for built-in transport failures. It is not required if preparation details and
the existing sentinel remain available.
## Lower-Priority Shared Wishlist Items
### Structured Capacity Errors
**Disposition:** Accepted into the
[future catalog](future.md#structured-capacity-errors).
The typed capacity error proposed by the
[Notarius wishlist](notarius-promptkit-wishlist.md#priority-4-structured-capacity-errors)
would improve Weatherreporter diagnostics by exposing the stable backend ID
without parsing error text.
Weatherreporter currently generates batch reports sequentially and constructs
one engine per invocation, so engine-local capacity exhaustion is unlikely in
the initial design. The feature would become more valuable if report
generation later becomes concurrent or PromptKit engines become longer-lived.
It should not block adoption.
### Semantic Execution-Target Fingerprints
**Disposition:** Deferred until prompt-independent profile inspection defines
the resolved target whose configuration identity would be fingerprinted.
The semantic target digest proposed by the
[Notarius wishlist](notarius-promptkit-wishlist.md#priority-3-semantic-execution-target-fingerprints)
would provide a compact equality signal for audit metadata.
Weatherreporter does not currently reuse LLM-dependent checkpoints. Its Recent
Changes behavior compares deterministic module snapshots rather than generated
reports, so the digest has no immediate cache-correctness role. Existing
PromptKit result metadata is sufficient for the initial integration. A digest
would still be useful provenance and future-proofing, but it is not a
migration priority.
## Capabilities PromptKit Already Provides Well
PromptKit v0.3.0 already provides the essential Weatherreporter integration
surface:
- importable in-process engine construction;
- filesystem, `fs.FS`, and programmatic prompt, profile, and schema sources;
- offline preparation without model execution;
- versioned prompt selection;
- text, Markdown, JSON, and JSON Schema output contracts;
- single-pass output validation with raw output retained after completed
validation failure;
- inline input artifacts with provenance URIs and input hashes;
- selected profile, backend, model, effective target, prompt hashes, timing,
and token-usage provenance;
- endpoint-only profiles and engine-scoped backend registration;
- injected model-client and artifact-reader interfaces;
- caller cancellation, generation timeout, and transport timeout behavior; and
- public error sentinels for configuration, prompt, profile, artifact,
validation, capacity, and generation failures.
These capabilities are sufficient for Weatherreporter to adopt PromptKit
without waiting for new upstream work.
## Responsibilities That Should Remain In Weatherreporter
The following concerns belong to Weatherreporter and should not move into
PromptKit:
- report definitions, valid periods, batches, and output naming;
- application prompt content and private report response schemas;
- deterministic weather facts, modules, and Recent Changes;
- curated `data_package` construction and persistence;
- generated-text domain validation and Markdown template rendering;
- managed artifact paths, atomic writes, metadata, and inspection commands;
- preparation, execution, raw-output, and failure-receipt schemas;
- CLI configuration loading and precedence;
- debug enablement, redaction, placement, sensitivity, and retention;
- distributor notification;
- batch continuation and any future retry policy; and
- application-level compatibility and migration policy.
## Suggested Upstream Sequence
If the PromptKit team chooses to pursue these ideas, the most useful order for
Weatherreporter would be:
1. Add executable preparation handles, ideally sharing implementation with an
atomic detailed-run API.
2. Add prompt-definition inspection.
3. Add prompt-independent profile inspection.
4. Consider eager source validation after evaluating whether the two exact
inspection APIs are sufficient.
5. Add structured generation errors.
6. Add structured capacity errors and semantic execution-target fingerprints
as lower-priority operational improvements.
The first item removes the only material integration workaround. Prompt and
profile inspection improve fail-fast validation. The remaining items improve
ergonomics and diagnostics.
## Adoption Sequencing
Weatherreporter should not wait for the complete wishlist. PromptKit v0.3.0 is
already sufficient when Weatherreporter:
- embeds immutable prompt and schema assets;
- supplies immutable inline data-package bytes;
- constructs one engine per CLI invocation;
- calls `Prepare` and `Run` with the same request; and
- keeps PromptKit behind a weatherreporter-owned adapter contract.
If executable preparation handles are scheduled for a near-term PromptKit
release, Weatherreporter may defer only its final adapter implementation to
avoid implementing and then removing duplicate preparation. Prompt corpus
retrieval, application-contract design, configuration work, embedded assets,
state contracts, and offline fixtures can proceed independently.
If the feature is not scheduled, Weatherreporter can adopt v0.3.0 and keep the
duplicate `Prepare` and `Run` sequence inside its adapter. A later PromptKit
upgrade would remain localized behind that neutral boundary.
Prompt inspection, profile inspection, source validation, structured errors,
capacity details, and semantic fingerprints should not gate adoption.

View File

@@ -63,9 +63,10 @@ var (
// ErrPromptRender identifies a failure to render prompt messages or the
// session ID from the resolved inputs and variables.
ErrPromptRender = errors.New("failed to render prompt")
// ErrCapacityExceeded identifies a Run rejected because the selected backend
// already admitted ConcurrencyLimit + QueueCapacity calls. It is not an
// invalid request, an LLM or provider rate-limit response, or ErrLLMGenerate.
// ErrCapacityExceeded identifies a Run or RunPrepared rejected because the
// selected backend already admitted ConcurrencyLimit + QueueCapacity calls.
// It is not an invalid request, an LLM or provider rate-limit response, or
// ErrLLMGenerate.
ErrCapacityExceeded = errors.New("backend capacity exceeded")
// ErrLLMGenerate identifies a model-client failure or a nil successful
// response. Errors returned by an injected LLMClient remain available
@@ -79,10 +80,12 @@ var (
// Engine prepares and runs Promptkit prompt requests.
//
// An Engine is safe for concurrent calls to [Engine.Prepare] and [Engine.Run].
// Each Engine owns independent backend-capacity pools that coordinate Run
// admission and model generation. Injected collaborators may still be invoked
// concurrently across different backend pools or for unlimited backends.
// An Engine is safe for concurrent calls to [Engine.Prepare],
// [Engine.PrepareExecution], [Engine.Run], and [Engine.RunPrepared]. Each
// Engine owns independent backend-capacity pools that coordinate Run and
// RunPrepared admission and model generation. Injected collaborators may still
// be invoked concurrently across different backend pools or for unlimited
// backends.
type Engine struct {
runner *usecase.Runner
}
@@ -146,12 +149,14 @@ type engineOptions struct {
artifactSource bool
}
// WithLLMClient replaces the built-in model client used by [Engine.Run].
// WithLLMClient replaces the built-in model client used by [Engine.Run] and
// [Engine.RunPrepared].
//
// A nil client makes NewEngine fail with ErrInvalidConfig. The Engine schedules
// Generate calls according to the selected backend's capacity policy, but the
// client may still be called concurrently across different backend pools or for
// unlimited backends. The client is not used by [Engine.Prepare].
// unlimited backends. The client is not used by [Engine.Prepare] or
// [Engine.PrepareExecution].
func WithLLMClient(client LLMClient) Option {
return optionFunc(func(options *engineOptions) error {
if client == nil {
@@ -457,6 +462,38 @@ func (e *Engine) Prepare(ctx context.Context, req RunRequest) (*PreparedRun, err
return fromDomainPreparedRun(prepared), nil
}
// PrepareExecution completely prepares a prompt request without calling the
// configured LLMClient or reserving backend admission capacity.
//
// The returned opaque handle is bound to this Engine and permits one
// [Engine.RunPrepared] invocation. Preparation freezes the selected sources,
// rendered messages, effective settings, inputs, provider structured-output
// metadata, and validation resources needed by that invocation. The handle
// retains a direct RunRequest.APIKey only in private execution state;
// [PreparedExecution.Details] is credential-redacted.
//
// The context governs preparation only. Cancellation after this method
// returns does not invalidate the handle or propagate to RunPrepared.
// PrepareExecution returns the same error categories as [Engine.Prepare] and
// returns no handle on error. A nil Engine returns an error matching
// ErrInvalidConfig.
func (e *Engine) PrepareExecution(ctx context.Context, req RunRequest) (*PreparedExecution, 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.PrepareExecution(ctx, domainReq)
if err != nil {
return nil, mapPublicError(err)
}
return &PreparedExecution{internal: prepared}, nil
}
// Run prepares a request, invokes the configured LLMClient, and validates the
// generated output.
//
@@ -491,3 +528,40 @@ func (e *Engine) Run(ctx context.Context, req RunRequest) (*RunResult, error) {
}
return fromDomainRunResult(result), nil
}
// RunPrepared atomically claims and executes a handle created by
// [Engine.PrepareExecution].
//
// A valid owning-Engine invocation consumes the handle's one attempt before
// credential revalidation, backend admission, generation, or validation.
// Cancellation, capacity rejection, generation failure, operational
// validation failure, and success all leave the handle unusable. A nil,
// zero-value, foreign-Engine, discarded, claimed, or used handle returns an
// error matching ErrInvalidRequest; a nil Engine returns ErrInvalidConfig and
// does not claim the handle.
//
// The supplied context governs this execution attempt independently of the
// preparation context. It covers credential revalidation, admission,
// generation, validation, and any internal repair. Result timing begins after
// the claim and excludes preparation and consumer-held delay.
//
// RunPrepared can return ErrInvalidRequest, ErrAPIKeyEnvMissing,
// ErrCapacityExceeded, ErrLLMGenerate, or ErrValidation as applicable while
// preserving documented collaborator and context identities. A completed
// content-validation rejection is returned in RunResult, not as an
// operational error. An operational error returns no partial RunResult.
func (e *Engine) RunPrepared(ctx context.Context, prepared *PreparedExecution) (*RunResult, error) {
if e == nil || e.runner == nil {
return nil, fmt.Errorf("%w: engine is nil", ErrInvalidConfig)
}
var internal *usecase.PreparedExecution
if prepared != nil {
internal = prepared.internal
}
result, err := e.runner.RunPrepared(ctx, internal)
if err != nil {
return nil, mapPublicError(err)
}
return fromDomainRunResult(result), nil
}

View File

@@ -1,5 +1,5 @@
// Package jsonvalue validates and defensively copies JSON-compatible value
// trees used by public configuration and request boundaries.
// trees used by configuration, request, and prepared-state boundaries.
package jsonvalue
import (
@@ -18,13 +18,19 @@ type visit struct {
ptr uintptr
}
// Copy validates and deeply copies a JSON-compatible value while preserving
// compatible concrete map, slice, array, scalar, and number types.
func Copy(src any) (any, error) {
return copyValue(reflect.ValueOf(src), "value", make(map[visit]struct{}), true)
}
// CopyMap validates and deeply copies an extra-parameter map while preserving
// compatible concrete map, slice, array, scalar, and number types.
func CopyMap(src map[string]any) (map[string]any, error) {
if src == nil {
return nil, nil
}
copied, err := copyValue(reflect.ValueOf(src), "extra_params", make(map[visit]struct{}))
copied, err := copyValue(reflect.ValueOf(src), "extra_params", make(map[visit]struct{}), false)
if err != nil {
return nil, err
}
@@ -35,7 +41,12 @@ func CopyMap(src map[string]any) (map[string]any, error) {
return out, nil
}
func copyValue(value reflect.Value, path string, seen map[visit]struct{}) (any, error) {
func copyValue(
value reflect.Value,
path string,
seen map[visit]struct{},
allowEmptyMapKeys bool,
) (any, error) {
if !value.IsValid() {
return nil, nil
}
@@ -43,7 +54,7 @@ func copyValue(value reflect.Value, path string, seen map[visit]struct{}) (any,
if value.IsNil() {
return nil, nil
}
return copyValue(value.Elem(), path, seen)
return copyValue(value.Elem(), path, seen, allowEmptyMapKeys)
}
if !value.CanInterface() {
return nil, fmt.Errorf("%s: value cannot be copied", path)
@@ -88,22 +99,27 @@ func copyValue(value reflect.Value, path string, seen map[visit]struct{}) (any,
}
seen[current] = struct{}{}
defer delete(seen, current)
return copyValue(value.Elem(), path, seen)
return copyValue(value.Elem(), path, seen, allowEmptyMapKeys)
case reflect.Map:
return copyMapValue(value, path, seen)
return copyMapValue(value, path, seen, allowEmptyMapKeys)
case reflect.Slice:
if value.IsNil() {
return nil, nil
}
return copySequenceValue(value, path, seen)
return copySequenceValue(value, path, seen, allowEmptyMapKeys)
case reflect.Array:
return copySequenceValue(value, path, seen)
return copySequenceValue(value, path, seen, allowEmptyMapKeys)
default:
return nil, fmt.Errorf("%s: unsupported JSON value type %s", path, value.Type())
}
}
func copyMapValue(value reflect.Value, path string, seen map[visit]struct{}) (any, error) {
func copyMapValue(
value reflect.Value,
path string,
seen map[visit]struct{},
allowEmptyMapKeys bool,
) (any, error) {
if value.IsNil() {
return nil, nil
}
@@ -133,10 +149,10 @@ func copyMapValue(value reflect.Value, path string, seen map[visit]struct{}) (an
elementType := value.Type().Elem()
for _, key := range keys {
name := key.String()
if name == "" {
if name == "" && !allowEmptyMapKeys {
return nil, fmt.Errorf("%s: map key must not be empty", path)
}
copied, err := copyValue(value.MapIndex(key), path+"."+name, seen)
copied, err := copyValue(value.MapIndex(key), path+"."+name, seen, allowEmptyMapKeys)
if err != nil {
return nil, err
}
@@ -171,7 +187,12 @@ func copyMapValue(value reflect.Value, path string, seen map[visit]struct{}) (an
return out, nil
}
func copySequenceValue(value reflect.Value, path string, seen map[visit]struct{}) (any, error) {
func copySequenceValue(
value reflect.Value,
path string,
seen map[visit]struct{},
allowEmptyMapKeys bool,
) (any, error) {
var current visit
if value.Kind() == reflect.Slice {
current = visit{typ: value.Type(), ptr: value.Pointer()}
@@ -186,7 +207,12 @@ func copySequenceValue(value reflect.Value, path string, seen map[visit]struct{}
preserveType := true
elementType := value.Type().Elem()
for i := 0; i < value.Len(); i++ {
copied, err := copyValue(value.Index(i), fmt.Sprintf("%s[%d]", path, i), seen)
copied, err := copyValue(
value.Index(i),
fmt.Sprintf("%s[%d]", path, i),
seen,
allowEmptyMapKeys,
)
if err != nil {
return nil, err
}

View File

@@ -44,6 +44,21 @@ func TestCopyMapPreservesTypesAndIsolatesMutations(t *testing.T) {
}
}
func TestCopyAllowsEmptyObjectKeysAndIsolatesMutations(t *testing.T) {
nested := map[string]any{"": []any{"original"}}
copiedValue, err := jsonvalue.Copy(nested)
if err != nil {
t.Fatalf("copy value: %v", err)
}
nested[""].([]any)[0] = "changed"
copied := copiedValue.(map[string]any)
if got := copied[""].([]any)[0]; got != "original" {
t.Fatalf("copied value was not isolated: %v", got)
}
}
func TestCopyMapRejectsInvalidValues(t *testing.T) {
cyclicMap := map[string]any{}
cyclicMap["self"] = cyclicMap

View File

@@ -0,0 +1,298 @@
package usecase
import (
"context"
"fmt"
"sync"
"time"
"gitea.maximumdirect.net/eric/promptkit/internal/domain"
"gitea.maximumdirect.net/eric/promptkit/internal/jsonvalue"
"gitea.maximumdirect.net/eric/promptkit/internal/validate"
)
type preparedExecutionState uint8
const (
preparedExecutionReady preparedExecutionState = iota
preparedExecutionClaimed
preparedExecutionDiscarded
)
// PreparedExecution owns one frozen, single-use runner execution.
type PreparedExecution struct {
owner *Runner
mu sync.Mutex
state preparedExecutionState
details *domain.PreparedRun
payload *preparedExecutionPayload
}
type preparedExecutionPayload struct {
prepared *domain.PreparedRun
validation validate.PreparedValidation
directKey string
}
// PrepareExecution completes preparation without generation or admission and
// returns a runner-bound, single-use execution.
func (r *Runner) PrepareExecution(ctx context.Context, req domain.RunRequest) (*PreparedExecution, error) {
state, err := r.resolvePreparation(ctx, req, time.Now().UTC())
if err != nil {
return nil, err
}
validationPlan, err := r.prepareValidation(ctx, state.effectiveContract)
if err != nil {
return nil, err
}
structuredOutput, err := r.structuredOutputFromValidationPlan(
state.definition,
state.effectiveContract,
validationPlan,
)
if err != nil {
return nil, err
}
prepared, err := r.completePreparationWithStructuredOutput(ctx, req, state, structuredOutput)
if err != nil {
return nil, err
}
executionSnapshot, err := clonePreparedRun(prepared)
if err != nil {
return nil, fmt.Errorf("%w: failed to copy prepared execution: %v", ErrInvalidRequest, err)
}
details, err := clonePreparedRun(executionSnapshot)
if err != nil {
return nil, fmt.Errorf("%w: failed to copy prepared execution details: %v", ErrInvalidRequest, err)
}
return &PreparedExecution{
owner: r,
state: preparedExecutionReady,
details: details,
payload: &preparedExecutionPayload{
prepared: executionSnapshot,
validation: validationPlan,
directKey: state.effectiveModel.APIKey,
},
}, nil
}
func (r *Runner) prepareValidation(
ctx context.Context,
contract domain.OutputContract,
) (validate.PreparedValidation, error) {
if r.validator == nil {
return noOpPreparedValidation{contract: contract}, nil
}
preparer, ok := r.validator.(validate.ValidationPreparer)
if !ok {
return nil, fmt.Errorf("%w: validator does not support prepared validation", ErrValidation)
}
plan, err := preparer.PrepareValidation(ctx, contract)
if err != nil {
return nil, fmt.Errorf("%w: %w", ErrValidation, err)
}
if plan == nil {
return nil, fmt.Errorf("%w: validator returned nil prepared validation", ErrValidation)
}
return plan, nil
}
func (r *Runner) structuredOutputFromValidationPlan(
def *domain.PromptDefinition,
contract domain.OutputContract,
plan validate.PreparedValidation,
) (*domain.StructuredOutputSpec, error) {
if contract.ValidationMode != domain.ValidationJSONSchema {
return nil, nil
}
schemaDocument := plan.SchemaDocument()
if schemaDocument == nil {
if r.validator == nil {
return nil, nil
}
return nil, fmt.Errorf("%w: prepared json_schema validation has no schema document", ErrValidation)
}
return structuredOutputSpec(def, schemaDocument), nil
}
// Details returns a fresh credential-redacted copy of the prepared run.
func (p *PreparedExecution) Details() *domain.PreparedRun {
if p == nil {
return nil
}
p.mu.Lock()
detailsSnapshot := p.details
p.mu.Unlock()
details, err := clonePreparedRun(detailsSnapshot)
if err != nil {
return nil
}
return details
}
// Discard invalidates an unclaimed execution and drops its private payload.
func (p *PreparedExecution) Discard() {
if p == nil {
return
}
p.mu.Lock()
if p.state != preparedExecutionReady {
p.mu.Unlock()
return
}
p.state = preparedExecutionDiscarded
payload := p.payload
p.payload = nil
p.mu.Unlock()
payload.clear()
}
// RunPrepared claims and executes one prepared execution owned by this runner.
func (r *Runner) RunPrepared(ctx context.Context, prepared *PreparedExecution) (*domain.RunResult, error) {
payload, err := prepared.claim(r)
if err != nil {
return nil, err
}
defer payload.clear()
runID, err := newRunID()
if err != nil {
return nil, fmt.Errorf("failed to create run id: %w", err)
}
start := time.Now().UTC()
target := payload.prepared.EffectiveModelParams
if err := validateAPIKey(target.APIKeyEnv, payload.directKey, target.APIKeyRequired); err != nil {
return nil, fmt.Errorf("%w: %w", ErrInvalidRequest, err)
}
release, err := r.admitRun(ctx, target.BackendID)
if err != nil {
return nil, err
}
defer release()
return r.executePreparedRun(ctx, payload.prepared, payload.directKey, runID, start, func(
ctx context.Context,
artifact *domain.Artifact,
attemptsUsed int,
) (domain.ValidationResult, error) {
result, validationErr := payload.validation.Validate(ctx, artifact)
if validationErr != nil {
return domain.ValidationResult{}, validationErr
}
result.RepairAttempts = attemptsUsed
return result, nil
})
}
func (p *PreparedExecution) claim(owner *Runner) (*preparedExecutionPayload, error) {
if p == nil || owner == nil || p.owner != owner {
return nil, fmt.Errorf("%w: prepared execution does not belong to this runner", ErrInvalidRequest)
}
p.mu.Lock()
defer p.mu.Unlock()
if p.state != preparedExecutionReady || p.payload == nil {
return nil, fmt.Errorf("%w: prepared execution is not ready", ErrInvalidRequest)
}
p.state = preparedExecutionClaimed
payload := p.payload
p.payload = nil
return payload, nil
}
func (p *preparedExecutionPayload) clear() {
if p == nil {
return
}
if p.prepared != nil {
p.prepared.EffectiveModelParams.APIKey = ""
}
p.prepared = nil
p.validation = nil
p.directKey = ""
}
type noOpPreparedValidation struct {
contract domain.OutputContract
}
func (p noOpPreparedValidation) Validate(
ctx context.Context,
_ *domain.Artifact,
) (domain.ValidationResult, error) {
if err := ctx.Err(); err != nil {
return domain.ValidationResult{}, err
}
return domain.ValidationResult{
Status: domain.ValidationSkipped,
Mode: p.contract.ValidationMode,
SchemaPath: p.contract.SchemaPath,
RepairAttempts: p.contract.RepairAttempts,
IsValid: true,
}, nil
}
func (noOpPreparedValidation) SchemaDocument() any {
return nil
}
func clonePreparedRun(source *domain.PreparedRun) (*domain.PreparedRun, error) {
if source == nil {
return nil, nil
}
copied := *source
extraParams, err := jsonvalue.CopyMap(source.EffectiveModelParams.ExtraParams)
if err != nil {
return nil, err
}
copied.EffectiveModelParams.ExtraParams = extraParams
if source.InputHashes != nil {
copied.InputHashes = make(map[string]string, len(source.InputHashes))
for name, hash := range source.InputHashes {
copied.InputHashes[name] = hash
}
}
if source.Messages != nil {
copied.Messages = make([]domain.RenderedMessage, len(source.Messages))
for i, message := range source.Messages {
copied.Messages[i] = message
if message.CacheControl != nil {
cacheControl := *message.CacheControl
copied.Messages[i].CacheControl = &cacheControl
}
}
}
if source.StructuredOutput != nil {
structuredOutput := *source.StructuredOutput
copied.StructuredOutput = &structuredOutput
if source.StructuredOutput.JSONSchema != nil {
jsonSchema := *source.StructuredOutput.JSONSchema
copied.StructuredOutput.JSONSchema = &jsonSchema
schema, copyErr := cloneJSONValue(source.StructuredOutput.JSONSchema.Schema)
if copyErr != nil {
return nil, copyErr
}
copied.StructuredOutput.JSONSchema.Schema = schema
}
}
return &copied, nil
}
func cloneJSONValue(source any) (any, error) {
return jsonvalue.Copy(source)
}

View File

@@ -0,0 +1,510 @@
package usecase
import (
"context"
"errors"
"os"
"reflect"
"testing"
"gitea.maximumdirect.net/eric/promptkit/internal/domain"
"gitea.maximumdirect.net/eric/promptkit/internal/validate"
)
type recordingPreparedValidation struct {
contract domain.OutputContract
schemaDocument any
results []domain.ValidationResult
errs []error
artifacts []string
}
func (p *recordingPreparedValidation) Validate(
_ context.Context,
artifact *domain.Artifact,
) (domain.ValidationResult, error) {
p.artifacts = append(p.artifacts, string(artifact.Body))
index := len(p.artifacts) - 1
if index < len(p.errs) && p.errs[index] != nil {
return domain.ValidationResult{}, p.errs[index]
}
if len(p.results) == 0 {
return domain.ValidationResult{
Status: domain.ValidationPassed,
Mode: p.contract.ValidationMode,
IsValid: true,
}, nil
}
if index >= len(p.results) {
index = len(p.results) - 1
}
return p.results[index], nil
}
func (p *recordingPreparedValidation) SchemaDocument() any {
return p.schemaDocument
}
type recordingValidationPreparer struct {
plan *recordingPreparedValidation
prepareErr error
prepareCalls int
directValidateCalls int
}
func (v *recordingValidationPreparer) Validate(
context.Context,
*domain.Artifact,
domain.OutputContract,
) (domain.ValidationResult, error) {
v.directValidateCalls++
return domain.ValidationResult{}, errors.New("live validation must not be used")
}
func (v *recordingValidationPreparer) PrepareValidation(
_ context.Context,
contract domain.OutputContract,
) (validate.PreparedValidation, error) {
v.prepareCalls++
if v.prepareErr != nil {
return nil, v.prepareErr
}
v.plan.contract = contract
return v.plan, nil
}
func TestRunnerPrepareExecutionCompletesWithoutAdmissionOrGeneration(t *testing.T) {
schemaDocument := map[string]any{
"type": "object",
"properties": map[string]any{
"value": map[string]any{"type": "string"},
"": map[string]any{"type": "boolean"},
},
}
def := promptDef(domain.FormatJSON, domain.ValidationJSONSchema, 0)
def.Validation.SchemaPath = "schema.json"
reader := defaultArtifactReader()
renderer := &fakeRenderer{rendered: &domain.RenderedPrompt{
SessionID: "prepared-session",
Messages: []domain.RenderedMessage{{
Role: "user",
Content: "original message",
}},
}}
llmClient := &fakeLLM{forbid: true}
validator := &recordingValidationPreparer{
plan: &recordingPreparedValidation{schemaDocument: schemaDocument},
}
admitter := &fakeRunAdmitter{}
profile := defaultExecutionProfile()
profile.ExtraParams = map[string]any{
"metadata": map[string]any{"source": "original"},
}
runner := NewRunner(
&fakePromptRepo{def: def},
&fakeExecutionProfileRepo{profiles: map[string]*domain.ExecutionProfile{"exec": profile}},
nil,
reader,
renderer,
llmClient,
validator,
admitter,
)
prepared, err := runner.PrepareExecution(context.Background(), domain.RunRequest{
PromptID: "p",
ProfileID: "exec",
APIKey: "direct-test-key",
Inputs: singleInputRef(),
})
if err != nil {
t.Fatalf("prepare execution: %v", err)
}
defer prepared.Discard()
if validator.prepareCalls != 1 || validator.directValidateCalls != 0 {
t.Fatalf(
"validation calls=(prepare=%d direct=%d), want (1, 0)",
validator.prepareCalls,
validator.directValidateCalls,
)
}
if reader.calls != 1 || renderer.calls != 1 {
t.Fatalf("completion calls=(artifact=%d render=%d), want (1, 1)", reader.calls, renderer.calls)
}
if len(admitter.backendIDs) != 0 || llmClient.calls != 0 {
t.Fatalf("prepare invoked execution collaborators: admission=%v generation=%d", admitter.backendIDs, llmClient.calls)
}
first := prepared.Details()
if first == nil {
t.Fatal("prepared details are nil")
}
if first.EffectiveModelParams.APIKey != "" {
t.Fatal("prepared details retained the direct API key")
}
if first.StructuredOutput == nil ||
first.StructuredOutput.JSONSchema == nil ||
!reflect.DeepEqual(first.StructuredOutput.JSONSchema.Schema, schemaDocument) {
t.Fatalf("prepared details have unexpected structured output: %#v", first.StructuredOutput)
}
first.Messages[0].Content = "caller mutation"
first.InputHashes["input"] = "caller mutation"
first.EffectiveModelParams.ExtraParams["metadata"].(map[string]any)["source"] = "caller mutation"
first.StructuredOutput.JSONSchema.Schema.(map[string]any)["type"] = "string"
renderer.rendered.Messages[0].Content = "source mutation"
second := prepared.Details()
if second.Messages[0].Content != "original message" ||
second.InputHashes["input"] == "caller mutation" ||
second.EffectiveModelParams.ExtraParams["metadata"].(map[string]any)["source"] != "original" ||
second.StructuredOutput.JSONSchema.Schema.(map[string]any)["type"] != "object" {
t.Fatalf("details did not preserve an independent snapshot: %#v", second)
}
}
func TestRunnerRunPreparedRechecksEnvironmentCredentialBeforeAdmission(t *testing.T) {
const environmentName = "PROMPTKIT_PREPARED_EXECUTION_TEST_KEY"
t.Setenv(environmentName, "available-during-preparation")
profile := defaultExecutionProfile()
profile.APIKeyEnv = environmentName
validator := &recordingValidationPreparer{plan: &recordingPreparedValidation{}}
admitter := &fakeRunAdmitter{}
llmClient := &fakeLLM{resp: &domain.GenerateResponse{Content: "unexpected"}}
runner := NewRunner(
&fakePromptRepo{def: promptDef(domain.FormatText, domain.ValidationNone, 0)},
&fakeExecutionProfileRepo{profiles: map[string]*domain.ExecutionProfile{"exec": profile}},
nil,
defaultArtifactReader(),
defaultRenderer(),
llmClient,
validator,
admitter,
)
prepared, err := runner.PrepareExecution(context.Background(), domain.RunRequest{
PromptID: "p",
ProfileID: "exec",
Inputs: singleInputRef(),
})
if err != nil {
t.Fatalf("prepare execution: %v", err)
}
if err := os.Unsetenv(environmentName); err != nil {
t.Fatalf("unset credential environment: %v", err)
}
result, err := runner.RunPrepared(context.Background(), prepared)
if result != nil {
t.Fatalf("credential failure returned partial result: %+v", result)
}
if !errors.Is(err, ErrInvalidRequest) || !errors.Is(err, ErrAPIKeyEnvMissing) {
t.Fatalf("credential error identities are missing: %v", err)
}
if len(admitter.backendIDs) != 0 || llmClient.calls != 0 {
t.Fatalf("credential failure reached admission or generation: admission=%v generation=%d", admitter.backendIDs, llmClient.calls)
}
if _, err := runner.RunPrepared(context.Background(), prepared); !errors.Is(err, ErrInvalidRequest) {
t.Fatalf("credential failure did not consume execution: %v", err)
}
}
func TestRunnerRunPreparedKeepsDirectCredentialOutOfMetadata(t *testing.T) {
const directKey = "direct-prepared-test-key"
profile := defaultExecutionProfile()
profile.APIKeyRequired = true
client := &fakeLLM{resp: &domain.GenerateResponse{Content: "ok"}}
runner := NewRunner(
&fakePromptRepo{def: promptDef(domain.FormatText, domain.ValidationNone, 0)},
&fakeExecutionProfileRepo{profiles: map[string]*domain.ExecutionProfile{"exec": profile}},
nil,
defaultArtifactReader(),
defaultRenderer(),
client,
&recordingValidationPreparer{plan: &recordingPreparedValidation{}},
nil,
)
prepared, err := runner.PrepareExecution(context.Background(), domain.RunRequest{
PromptID: "p",
ProfileID: "exec",
APIKey: directKey,
Inputs: singleInputRef(),
})
if err != nil {
t.Fatalf("prepare execution: %v", err)
}
if details := prepared.Details(); details.EffectiveModelParams.APIKey != "" {
t.Fatal("prepared details retained direct credential")
}
result, err := runner.RunPrepared(context.Background(), prepared)
if err != nil {
t.Fatalf("run prepared: %v", err)
}
if client.lastReq.Target.APIKey != directKey {
t.Fatal("generation did not receive direct credential")
}
if result.EffectiveModelParams.APIKey != "" {
t.Fatal("run result retained direct credential")
}
}
func TestRunnerRunPreparedUsesFrozenValidationForInitialAndRepairOutputs(t *testing.T) {
validator := &recordingValidationPreparer{
plan: &recordingPreparedValidation{
results: []domain.ValidationResult{
{
Status: domain.ValidationFailed,
Mode: domain.ValidationJSON,
Errors: []string{"invalid"},
IsValid: false,
},
{
Status: domain.ValidationPassed,
Mode: domain.ValidationJSON,
IsValid: true,
},
},
},
}
repairer := &fakeRepairer{
responses: []*domain.GenerateResponse{{Content: `{"repaired":true}`}},
}
admitter := &fakeRunAdmitter{}
reader := defaultArtifactReader()
renderer := defaultRenderer()
runner := NewRunnerWithRepairer(
&fakePromptRepo{def: promptDef(domain.FormatJSON, domain.ValidationJSON, 1)},
&fakeExecutionProfileRepo{profiles: map[string]*domain.ExecutionProfile{"exec": defaultExecutionProfile()}},
nil,
reader,
renderer,
&fakeLLM{resp: &domain.GenerateResponse{Content: `{"broken":true}`}},
validator,
repairer,
admitter,
)
prepared, err := runner.PrepareExecution(context.Background(), domain.RunRequest{
PromptID: "p",
ProfileID: "exec",
Inputs: singleInputRef(),
})
if err != nil {
t.Fatalf("prepare execution: %v", err)
}
result, err := runner.RunPrepared(context.Background(), prepared)
if err != nil {
t.Fatalf("run prepared: %v", err)
}
if !reflect.DeepEqual(validator.plan.artifacts, []string{`{"broken":true}`, `{"repaired":true}`}) {
t.Fatalf("prepared validation artifacts=%#v", validator.plan.artifacts)
}
if validator.directValidateCalls != 0 || repairer.calls != 1 {
t.Fatalf("validation/repair calls=(direct=%d repair=%d), want (0, 1)", validator.directValidateCalls, repairer.calls)
}
if result.Validation.Status != domain.ValidationPassed || result.Validation.RepairAttempts != 1 {
t.Fatalf("unexpected repaired validation result: %+v", result.Validation)
}
if admitter.releaseCalls != 1 {
t.Fatalf("admission releases=%d, want 1", admitter.releaseCalls)
}
if reader.calls != 1 || renderer.calls != 1 {
t.Fatalf("execution reopened preparation sources: artifact=%d render=%d", reader.calls, renderer.calls)
}
}
func TestRunnerRunPreparedReleasesAdmissionAcrossExecutionErrors(t *testing.T) {
generationFailure := errors.New("generation failed")
validationFailure := errors.New("validation failed")
repairFailure := errors.New("repair failed")
tests := []struct {
name string
generationErr error
validation *recordingPreparedValidation
repairer *fakeRepairer
wantError error
}{
{
name: "generation failure",
generationErr: generationFailure,
validation: &recordingPreparedValidation{},
wantError: ErrLLMGenerate,
},
{
name: "validation failure",
validation: &recordingPreparedValidation{
errs: []error{validationFailure},
},
wantError: ErrValidation,
},
{
name: "repair failure",
validation: &recordingPreparedValidation{
results: []domain.ValidationResult{{
Status: domain.ValidationFailed,
Mode: domain.ValidationJSON,
Errors: []string{"invalid"},
IsValid: false,
}},
},
repairer: &fakeRepairer{err: repairFailure},
wantError: ErrValidation,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
def := promptDef(domain.FormatJSON, domain.ValidationJSON, 1)
if test.repairer == nil {
def.Validation.RepairAttempts = 0
}
validator := &recordingValidationPreparer{plan: test.validation}
admitter := &fakeRunAdmitter{}
runner := NewRunnerWithRepairer(
&fakePromptRepo{def: def},
&fakeExecutionProfileRepo{profiles: map[string]*domain.ExecutionProfile{"exec": defaultExecutionProfile()}},
nil,
defaultArtifactReader(),
defaultRenderer(),
&fakeLLM{
resp: &domain.GenerateResponse{Content: `{"value":true}`},
err: test.generationErr,
},
validator,
test.repairer,
admitter,
)
prepared, err := runner.PrepareExecution(context.Background(), domain.RunRequest{
PromptID: "p",
ProfileID: "exec",
Inputs: singleInputRef(),
})
if err != nil {
t.Fatalf("prepare execution: %v", err)
}
result, err := runner.RunPrepared(context.Background(), prepared)
if result != nil || !errors.Is(err, test.wantError) {
t.Fatalf("run prepared=(%+v, %v), want %v", result, err, test.wantError)
}
if len(admitter.backendIDs) != 1 || admitter.releaseCalls != 1 {
t.Fatalf(
"admission calls=%#v releases=%d, want one each",
admitter.backendIDs,
admitter.releaseCalls,
)
}
})
}
}
func TestRunnerPreparedExecutionOwnershipUseAndDiscard(t *testing.T) {
newRunner := func() *Runner {
return NewRunner(
&fakePromptRepo{def: promptDef(domain.FormatText, domain.ValidationNone, 0)},
&fakeExecutionProfileRepo{profiles: map[string]*domain.ExecutionProfile{"exec": defaultExecutionProfile()}},
nil,
defaultArtifactReader(),
defaultRenderer(),
&fakeLLM{resp: &domain.GenerateResponse{Content: "ok"}},
&recordingValidationPreparer{plan: &recordingPreparedValidation{}},
nil,
)
}
request := domain.RunRequest{
PromptID: "p",
ProfileID: "exec",
Inputs: singleInputRef(),
}
owner := newRunner()
prepared, err := owner.PrepareExecution(context.Background(), request)
if err != nil {
t.Fatalf("prepare execution: %v", err)
}
if _, err := newRunner().RunPrepared(context.Background(), prepared); !errors.Is(err, ErrInvalidRequest) {
t.Fatalf("foreign runner error=%v, want ErrInvalidRequest", err)
}
if _, err := owner.RunPrepared(context.Background(), prepared); err != nil {
t.Fatalf("owner run prepared: %v", err)
}
if _, err := owner.RunPrepared(context.Background(), prepared); !errors.Is(err, ErrInvalidRequest) {
t.Fatalf("second owner run error=%v, want ErrInvalidRequest", err)
}
if prepared.Details() == nil {
t.Fatal("details unavailable after execution")
}
discarded, err := owner.PrepareExecution(context.Background(), request)
if err != nil {
t.Fatalf("prepare discarded execution: %v", err)
}
discarded.Discard()
discarded.Discard()
if _, err := owner.RunPrepared(context.Background(), discarded); !errors.Is(err, ErrInvalidRequest) {
t.Fatalf("discarded execution error=%v, want ErrInvalidRequest", err)
}
if discarded.Details() == nil {
t.Fatal("details unavailable after discard")
}
}
func TestRunnerPreparedExecutionWithoutValidatorSkipsValidation(t *testing.T) {
runner := NewRunner(
&fakePromptRepo{def: promptDef(domain.FormatJSON, domain.ValidationJSON, 0)},
&fakeExecutionProfileRepo{profiles: map[string]*domain.ExecutionProfile{"exec": defaultExecutionProfile()}},
nil,
defaultArtifactReader(),
defaultRenderer(),
&fakeLLM{resp: &domain.GenerateResponse{Content: `{}`}},
nil,
nil,
)
prepared, err := runner.PrepareExecution(context.Background(), domain.RunRequest{
PromptID: "p",
ProfileID: "exec",
Inputs: singleInputRef(),
})
if err != nil {
t.Fatalf("prepare execution: %v", err)
}
result, err := runner.RunPrepared(context.Background(), prepared)
if err != nil {
t.Fatalf("run prepared: %v", err)
}
if result.Validation.Status != domain.ValidationSkipped || !result.Validation.IsValid {
t.Fatalf("unexpected no-validator result: %+v", result.Validation)
}
}
func TestRunnerPrepareExecutionRequiresValidationPreparer(t *testing.T) {
reader := defaultArtifactReader()
runner := NewRunner(
&fakePromptRepo{def: promptDef(domain.FormatText, domain.ValidationBasic, 0)},
&fakeExecutionProfileRepo{profiles: map[string]*domain.ExecutionProfile{"exec": defaultExecutionProfile()}},
nil,
reader,
defaultRenderer(),
&fakeLLM{forbid: true},
&fakeValidator{},
nil,
)
prepared, err := runner.PrepareExecution(context.Background(), domain.RunRequest{
PromptID: "p",
ProfileID: "exec",
Inputs: singleInputRef(),
})
if prepared != nil || !errors.Is(err, ErrValidation) {
t.Fatalf("prepare execution=(%+v, %v), want ErrValidation", prepared, err)
}
if reader.calls != 0 {
t.Fatalf("unsupported validator allowed completion, artifact calls=%d", reader.calls)
}
}

View File

@@ -131,29 +131,46 @@ func (r *Runner) Run(ctx context.Context, req domain.RunRequest) (*domain.RunRes
return nil, err
}
if r.admitter != nil {
release, admitErr := r.admitter.Admit(ctx, state.effectiveModel.BackendID)
if admitErr != nil {
if errors.Is(admitErr, capacity.ErrCapacityExceeded) {
return nil, fmt.Errorf(
"backend %q admission: %w",
state.effectiveModel.BackendID,
admitErr,
)
}
return nil, admitErr
}
defer release()
release, err := r.admitRun(ctx, state.effectiveModel.BackendID)
if err != nil {
return nil, err
}
defer release()
prepared, err := r.completePreparation(ctx, req, state)
if err != nil {
return nil, err
}
directAPIKey := state.effectiveModel.APIKey
return r.executePreparedRun(ctx, prepared, directAPIKey, runID, start, func(
ctx context.Context,
artifact *domain.Artifact,
attemptsUsed int,
) (domain.ValidationResult, error) {
return r.validateOutput(ctx, artifact, prepared.OutputContract, attemptsUsed)
})
}
type preparedValidationFunc func(
context.Context,
*domain.Artifact,
int,
) (domain.ValidationResult, error)
func (r *Runner) executePreparedRun(
ctx context.Context,
prepared *domain.PreparedRun,
directAPIKey string,
runID string,
start time.Time,
validateArtifact preparedValidationFunc,
) (*domain.RunResult, error) {
executionTarget := prepared.EffectiveModelParams
executionTarget.APIKey = directAPIKey
genResp, err := r.llm.Generate(ctx, domain.GenerateRequest{
Prompt: domain.RenderedPrompt{SessionID: prepared.SessionID, Messages: prepared.Messages},
Target: prepared.EffectiveModelParams,
Target: executionTarget,
TargetPresence: prepared.TargetPresence,
StructuredOutput: prepared.StructuredOutput,
})
@@ -165,7 +182,7 @@ func (r *Runner) Run(ctx context.Context, req domain.RunRequest) (*domain.RunRes
}
outputArtifact := buildOutputArtifact(genResp.Content, prepared.OutputContract.Format)
validationResult, err := r.validateOutput(ctx, &outputArtifact, prepared.OutputContract, 0)
validationResult, err := validateArtifact(ctx, &outputArtifact, 0)
if err != nil {
return nil, fmt.Errorf("%w: %w", ErrValidation, err)
}
@@ -179,7 +196,7 @@ func (r *Runner) Run(ctx context.Context, req domain.RunRequest) (*domain.RunRes
PreviousOutput: genResp.Content,
ValidationErrors: validationResult.Errors,
SessionID: prepared.SessionID,
Target: prepared.EffectiveModelParams,
Target: executionTarget,
StructuredOutput: prepared.StructuredOutput,
Attempt: attemptsUsed,
MaxAttempts: prepared.OutputContract.RepairAttempts,
@@ -195,7 +212,7 @@ func (r *Runner) Run(ctx context.Context, req domain.RunRequest) (*domain.RunRes
genResp = repairResp
outputArtifact = buildOutputArtifact(genResp.Content, prepared.OutputContract.Format)
validationResult, err = r.validateOutput(ctx, &outputArtifact, prepared.OutputContract, attemptsUsed)
validationResult, err = validateArtifact(ctx, &outputArtifact, attemptsUsed)
if err != nil {
return nil, fmt.Errorf("%w: %w", ErrValidation, err)
}
@@ -203,6 +220,7 @@ func (r *Runner) Run(ctx context.Context, req domain.RunRequest) (*domain.RunRes
}
end := time.Now().UTC()
executionTarget.APIKey = ""
return &domain.RunResult{
RunID: runID,
@@ -218,7 +236,7 @@ func (r *Runner) Run(ctx context.Context, req domain.RunRequest) (*domain.RunRes
SelectedBackendID: prepared.SelectedBackendID,
ModelName: prepared.EffectiveModelParams.Model,
Endpoint: prepared.EffectiveModelParams.Endpoint,
EffectiveModelParams: prepared.EffectiveModelParams,
EffectiveModelParams: executionTarget,
InputHashes: prepared.InputHashes,
Usage: genResp.Usage,
StartTime: start,
@@ -324,7 +342,15 @@ func (r *Runner) completePreparation(
if err != nil {
return nil, err
}
return r.completePreparationWithStructuredOutput(ctx, req, state, structuredOutput)
}
func (r *Runner) completePreparationWithStructuredOutput(
ctx context.Context,
req domain.RunRequest,
state *preparationState,
structuredOutput *domain.StructuredOutputSpec,
) (*domain.PreparedRun, error) {
resolvedInputs := make(map[string]*domain.Artifact, len(req.Inputs))
inputHashes := make(map[string]string, len(req.Inputs))
for name, ref := range req.Inputs {
@@ -354,13 +380,15 @@ func (r *Runner) completePreparation(
}
end := time.Now().UTC()
effectiveModel := state.effectiveModel
effectiveModel.APIKey = ""
return &domain.PreparedRun{
PromptID: state.definition.ID,
PromptVersion: state.definition.Version,
PromptHash: state.promptDefinitionHash,
SelectedProfileID: state.selectedProfileID,
SelectedBackendID: state.effectiveModel.BackendID,
EffectiveModelParams: state.effectiveModel,
EffectiveModelParams: effectiveModel,
TargetPresence: state.targetPresence,
OutputContract: state.effectiveContract,
StructuredOutput: structuredOutput,
@@ -374,6 +402,20 @@ func (r *Runner) completePreparation(
}, nil
}
func (r *Runner) admitRun(ctx context.Context, backendID string) (func(), error) {
if r.admitter == nil {
return func() {}, nil
}
release, err := r.admitter.Admit(ctx, backendID)
if err != nil {
if errors.Is(err, capacity.ErrCapacityExceeded) {
return nil, fmt.Errorf("backend %q admission: %w", backendID, err)
}
return nil, err
}
return release, nil
}
func (r *Runner) resolveStructuredOutput(ctx context.Context, def *domain.PromptDefinition, contract domain.OutputContract) (*domain.StructuredOutputSpec, error) {
if contract.ValidationMode != domain.ValidationJSONSchema {
return nil, nil
@@ -389,14 +431,18 @@ func (r *Runner) resolveStructuredOutput(ctx context.Context, def *domain.Prompt
return nil, fmt.Errorf("%w: failed to load json schema for structured output: %v", ErrValidation, err)
}
return structuredOutputSpec(def, schemaDoc), nil
}
func structuredOutputSpec(def *domain.PromptDefinition, schemaDocument any) *domain.StructuredOutputSpec {
return &domain.StructuredOutputSpec{
Type: domain.StructuredOutputJSONSchema,
JSONSchema: &domain.StructuredOutputJSONSpec{
Name: deriveStructuredSchemaName(def.ID, def.Version),
Strict: true,
Schema: schemaDoc,
Schema: schemaDocument,
},
}, nil
}
}
func deriveStructuredSchemaName(promptID string, promptVersion string) string {

View File

@@ -1757,7 +1757,7 @@ func TestRunnerRunDirectAPIKeyBypassesMissingEnvAndReachesLLM(t *testing.T) {
llmClient := &fakeLLM{resp: &domain.GenerateResponse{Content: "ok"}}
runner := NewRunner(promptRepo, execRepo, nil, defaultArtifactReader(), defaultRenderer(), llmClient, nil, nil)
_, err := runner.Run(context.Background(), domain.RunRequest{
result, err := runner.Run(context.Background(), domain.RunRequest{
PromptID: "p",
ProfileID: "exec",
APIKey: directKey,
@@ -1769,6 +1769,9 @@ func TestRunnerRunDirectAPIKeyBypassesMissingEnvAndReachesLLM(t *testing.T) {
if llmClient.lastReq.Target.APIKey != directKey {
t.Fatalf("expected direct API key to reach LLM request")
}
if result.EffectiveModelParams.APIKey != "" {
t.Fatal("run result retained direct API key")
}
if llmClient.lastReq.Target.APIKeyEnv != "PROMPTKIT_MISSING_KEY" {
t.Fatalf("expected api_key_env name to remain on target, got %q", llmClient.lastReq.Target.APIKeyEnv)
}

View File

@@ -45,6 +45,101 @@ func (v *FSValidator) Validate(ctx context.Context, artifact *domain.Artifact, c
return validateArtifact(ctx, artifact, contract, v.validateJSONSchema)
}
type preparedValidation struct {
contract domain.OutputContract
schemaDocument any
schema *jsonschema.Schema
}
func (p *preparedValidation) Validate(ctx context.Context, artifact *domain.Artifact) (domain.ValidationResult, error) {
return validateArtifact(ctx, artifact, p.contract, p.validateJSONSchema)
}
func (p *preparedValidation) SchemaDocument() any {
return p.schemaDocument
}
func (p *preparedValidation) validateJSONSchema(instance any, _ string) ([]string, error) {
if p.schema == nil {
return nil, errors.New("prepared JSON schema is unavailable")
}
if err := p.schema.Validate(instance); err != nil {
return []string{fmt.Sprintf("json schema validation failed: %v", err)}, nil
}
return nil, nil
}
func (v *StandardValidator) PrepareValidation(ctx context.Context, contract domain.OutputContract) (PreparedValidation, error) {
if err := ctx.Err(); err != nil {
return nil, err
}
prepared := &preparedValidation{contract: contract}
if contract.ValidationMode != domain.ValidationJSONSchema {
return prepared, nil
}
resolvedSchemaPath, err := v.resolveSchemaPath(contract.SchemaPath)
if err != nil {
return nil, err
}
schemaDocument, err := loadJSONSchemaFile(resolvedSchemaPath)
if err != nil {
return nil, fmt.Errorf("failed to compile JSON schema %q: %w", resolvedSchemaPath, err)
}
schemaRoot, err := v.schemaRoot()
if err != nil {
return nil, err
}
compiler := newSchemaCompiler(standardSchemaLoader{root: schemaRoot})
if err := compiler.AddResource(resolvedSchemaPath, schemaDocument); err != nil {
return nil, fmt.Errorf("failed to register JSON schema %q: %w", resolvedSchemaPath, err)
}
schema, err := compiler.Compile(resolvedSchemaPath)
if err != nil {
return nil, fmt.Errorf("failed to compile JSON schema %q: %w", resolvedSchemaPath, err)
}
if err := ctx.Err(); err != nil {
return nil, err
}
prepared.schemaDocument = schemaDocument
prepared.schema = schema
return prepared, nil
}
func (v *FSValidator) PrepareValidation(ctx context.Context, contract domain.OutputContract) (PreparedValidation, error) {
if err := ctx.Err(); err != nil {
return nil, err
}
prepared := &preparedValidation{contract: contract}
if contract.ValidationMode != domain.ValidationJSONSchema {
return prepared, nil
}
schemaName, schemaDocument, err := v.loadSchemaDocument(contract.SchemaPath)
if err != nil {
return nil, err
}
resourceURL := fsSchemaResourceURL(schemaName)
compiler := newSchemaCompiler(fsSchemaLoader{fsys: v.fsys, root: filecatalog.CleanFSRoot(v.root)})
if err := compiler.AddResource(resourceURL, schemaDocument); err != nil {
return nil, fmt.Errorf("failed to register JSON schema %q: %w", schemaName, err)
}
schema, err := compiler.Compile(resourceURL)
if err != nil {
return nil, fmt.Errorf("failed to compile JSON schema %q: %w", schemaName, err)
}
if err := ctx.Err(); err != nil {
return nil, err
}
prepared.schemaDocument = schemaDocument
prepared.schema = schema
return prepared, nil
}
type schemaValidatorFunc func(instance any, schemaPath string) ([]string, error)
func validateArtifact(ctx context.Context, artifact *domain.Artifact, contract domain.OutputContract, validateSchema schemaValidatorFunc) (domain.ValidationResult, error) {

View File

@@ -5,6 +5,7 @@ import (
"encoding/json"
"os"
"path/filepath"
"reflect"
"strconv"
"strings"
"testing"
@@ -120,6 +121,68 @@ func TestStandardValidatorJSONSchemaSuccess(t *testing.T) {
}
}
func TestStandardValidatorPreparedSchemaSurvivesSourceRemoval(t *testing.T) {
tmp := t.TempDir()
rootSchema := []byte(`{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "original root",
"type": "object",
"required": ["value"],
"properties": {
"value": {"$ref": "value.json"}
}
}`)
rootPath := filepath.Join(tmp, "schema.json")
referencePath := filepath.Join(tmp, "value.json")
if err := os.WriteFile(rootPath, rootSchema, 0o644); err != nil {
t.Fatal(err)
}
if err := os.WriteFile(referencePath, []byte(`{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "integer",
"minimum": 2
}`), 0o644); err != nil {
t.Fatal(err)
}
validator := NewStandardValidator(tmp)
preparer, ok := validator.(ValidationPreparer)
if !ok {
t.Fatal("standard validator does not support validation preparation")
}
prepared, err := preparer.PrepareValidation(context.Background(), domain.OutputContract{
ValidationMode: domain.ValidationJSONSchema,
SchemaPath: "schema.json",
})
if err != nil {
t.Fatalf("prepare validation: %v", err)
}
assertSchemaDocument(t, prepared.SchemaDocument(), rootSchema)
if err := os.Remove(rootPath); err != nil {
t.Fatal(err)
}
if err := os.Remove(referencePath); err != nil {
t.Fatal(err)
}
valid, err := prepared.Validate(context.Background(), &domain.Artifact{Body: []byte(`{"value":3}`)})
if err != nil {
t.Fatalf("validate prepared artifact: %v", err)
}
if valid.Status != domain.ValidationPassed || !valid.IsValid {
t.Fatalf("expected passed/valid, got status=%q valid=%v errors=%v", valid.Status, valid.IsValid, valid.Errors)
}
invalid, err := prepared.Validate(context.Background(), &domain.Artifact{Body: []byte(`{"value":"changed"}`)})
if err != nil {
t.Fatalf("validate prepared artifact: %v", err)
}
if invalid.Status != domain.ValidationFailed || invalid.IsValid {
t.Fatalf("expected failed/invalid, got status=%q valid=%v", invalid.Status, invalid.IsValid)
}
}
func TestStandardValidatorJSONSchemaNestedSchemaPathSuccess(t *testing.T) {
tmp := t.TempDir()
nestedDir := filepath.Join(tmp, "dnd")
@@ -295,6 +358,64 @@ func TestFSValidatorJSONSchemaSuccess(t *testing.T) {
}
}
func TestFSValidatorPreparedSchemaSurvivesSourceMutation(t *testing.T) {
rootSchema := []byte(`{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "original root",
"type": "object",
"required": ["value"],
"properties": {
"value": {"$ref": "value.json"}
}
}`)
fsys := fstest.MapFS{
"schema.json": &fstest.MapFile{Data: rootSchema},
"value.json": &fstest.MapFile{Data: []byte(`{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "integer",
"minimum": 2
}`)},
}
validator := NewFSValidator(fsys, ".")
preparer, ok := validator.(ValidationPreparer)
if !ok {
t.Fatal("filesystem validator does not support validation preparation")
}
prepared, err := preparer.PrepareValidation(context.Background(), domain.OutputContract{
ValidationMode: domain.ValidationJSONSchema,
SchemaPath: "schema.json",
})
if err != nil {
t.Fatalf("prepare validation: %v", err)
}
assertSchemaDocument(t, prepared.SchemaDocument(), rootSchema)
fsys["schema.json"] = &fstest.MapFile{Data: []byte(`{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "string"
}`)}
fsys["value.json"] = &fstest.MapFile{Data: []byte(`{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "string"
}`)}
valid, err := prepared.Validate(context.Background(), &domain.Artifact{Body: []byte(`{"value":3}`)})
if err != nil {
t.Fatalf("validate prepared artifact: %v", err)
}
if valid.Status != domain.ValidationPassed || !valid.IsValid {
t.Fatalf("expected passed/valid, got status=%q valid=%v errors=%v", valid.Status, valid.IsValid, valid.Errors)
}
invalid, err := prepared.Validate(context.Background(), &domain.Artifact{Body: []byte(`{"value":"changed"}`)})
if err != nil {
t.Fatalf("validate prepared artifact: %v", err)
}
if invalid.Status != domain.ValidationFailed || invalid.IsValid {
t.Fatalf("expected failed/invalid, got status=%q valid=%v", invalid.Status, invalid.IsValid)
}
}
func TestFSValidatorJSONSchemaRegistrationError(t *testing.T) {
v := NewFSValidator(fstest.MapFS{
"schemas/%zz.json": &fstest.MapFile{Data: []byte(`{"type":"object"}`)},
@@ -548,3 +669,15 @@ func TestJSONSchemaDialectIsDraft2020(t *testing.T) {
})
}
}
func assertSchemaDocument(t *testing.T, got any, expectedJSON []byte) {
t.Helper()
var expected any
if err := json.Unmarshal(expectedJSON, &expected); err != nil {
t.Fatalf("decode expected schema document: %v", err)
}
if !reflect.DeepEqual(got, expected) {
t.Fatalf("schema document mismatch:\n got: %#v\nwant: %#v", got, expected)
}
}

View File

@@ -2,6 +2,7 @@ package validate
import (
"context"
"gitea.maximumdirect.net/eric/promptkit/internal/domain"
)
@@ -10,6 +11,20 @@ type Validator interface {
Validate(ctx context.Context, artifact *domain.Artifact, contract domain.OutputContract) (domain.ValidationResult, error)
}
// PreparedValidation validates artifacts against one frozen output contract.
type PreparedValidation interface {
Validate(ctx context.Context, artifact *domain.Artifact) (domain.ValidationResult, error)
// SchemaDocument returns the root JSON Schema document used for provider
// structured output, or nil for non-schema modes. Returned internal
// immutable state must not be mutated.
SchemaDocument() any
}
// ValidationPreparer freezes validation resources for one output contract.
type ValidationPreparer interface {
PrepareValidation(ctx context.Context, contract domain.OutputContract) (PreparedValidation, error)
}
// SchemaDocumentLoader loads JSON schema documents using validator path semantics.
type SchemaDocumentLoader interface {
LoadSchemaDocument(ctx context.Context, schemaPath string) (any, error)

55
prepared_execution.go Normal file
View File

@@ -0,0 +1,55 @@
package promptkit
import "gitea.maximumdirect.net/eric/promptkit/internal/usecase"
const preparedExecutionString = "promptkit.PreparedExecution{opaque}"
// PreparedExecution is an opaque, in-process handle for one completely
// prepared execution. A handle is bound to the [Engine] that created it and
// permits one [Engine.RunPrepared] invocation.
//
// PreparedExecution contains no supported serializable state and cannot be
// used as a restartable job. Copying the value preserves the same shared
// lifecycle; it does not create another execution attempt.
type PreparedExecution struct {
internal *usecase.PreparedExecution
}
// Details returns a fresh caller-owned, credential-redacted copy of the
// prepared request details. Mutating the result cannot affect execution or a
// later Details call. Details remains available after execution or discard.
//
// A nil receiver or zero-value PreparedExecution returns a zero [PreparedRun].
func (p *PreparedExecution) Details() PreparedRun {
if p == nil || p.internal == nil {
return PreparedRun{}
}
details := fromDomainPreparedRun(p.internal.Details())
if details == nil {
return PreparedRun{}
}
return *details
}
// Discard invalidates an unclaimed handle and drops Promptkit's references to
// its execution-only state. Discard is nil-safe and idempotent. It does not
// cancel an execution that has already claimed the handle; use the
// [Engine.RunPrepared] context for cancellation.
func (p *PreparedExecution) Discard() {
if p == nil || p.internal == nil {
return
}
p.internal.Discard()
}
// String returns a constant representation that exposes no retained request,
// rendered content, or credential data.
func (p *PreparedExecution) String() string {
return preparedExecutionString
}
// GoString returns a constant Go-syntax representation that exposes no
// retained request, rendered content, or credential data.
func (p *PreparedExecution) GoString() string {
return preparedExecutionString
}

View File

@@ -0,0 +1,768 @@
package promptkit_test
import (
"context"
"encoding/json"
"errors"
"fmt"
"os"
"reflect"
"strings"
"sync"
"testing"
"testing/fstest"
"time"
"gitea.maximumdirect.net/eric/promptkit"
)
func TestPreparedExecutionFreezesSourcesAndReturnsIndependentDetails(t *testing.T) {
promptSource := preparedPromptSource("original")
profileSource := preparedProfileSource("original-model")
schemaSource := preparedSchemaSource()
reader := &mutablePreparedArtifactReader{
body: "original artifact",
hash: "original-input-hash",
}
client := &preparedRecordingClient{
response: &promptkit.GenerateResponse{Content: `{"value":3}`},
}
engine, err := promptkit.NewEngine(
promptkit.Config{},
promptkit.WithPromptFS(promptSource, "."),
promptkit.WithProfileFS(profileSource, "."),
promptkit.WithSchemaFS(schemaSource, "."),
promptkit.WithArtifactReader(reader),
promptkit.WithLLMClient(client),
)
if err != nil {
t.Fatalf("construct engine: %v", err)
}
temperature := 0.25
extraParams := map[string]any{
"nested": map[string]any{"source": "original"},
}
request := promptkit.RunRequest{
PromptID: "prepared",
Inputs: map[string]promptkit.ArtifactRef{
"input": promptkit.Inline("original request input"),
},
Vars: map[string]string{"label": "original variable"},
Execution: &promptkit.ExecutionTargetOverride{
Temperature: &temperature,
ExtraParams: extraParams,
},
}
preparationContext, cancelPreparation := context.WithCancel(context.Background())
prepared, err := engine.PrepareExecution(preparationContext, request)
if err != nil {
t.Fatalf("prepare execution: %v", err)
}
cancelPreparation()
request.PromptID = "changed"
request.Inputs["input"] = promptkit.Inline("changed request input")
request.Vars["label"] = "changed variable"
temperature = 1.5
extraParams["nested"].(map[string]any)["source"] = "changed"
promptSource["prompt.yaml"] = &fstest.MapFile{Data: []byte(`id: changed`)}
profileSource["profile.yaml"] = &fstest.MapFile{Data: []byte(`id: changed`)}
schemaSource["schema.json"] = &fstest.MapFile{Data: []byte(`{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "changed root",
"type": "string"
}`)}
schemaSource["value.json"] = &fstest.MapFile{Data: []byte(`{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "string"
}`)}
reader.set("changed artifact", "changed-input-hash")
first := prepared.Details()
first.Messages[0].Content = "changed details"
first.InputHashes["input"] = "changed-details-hash"
first.EffectiveModelParams.ExtraParams["nested"].(map[string]any)["source"] = "changed details"
first.StructuredOutput.JSONSchema.Schema.(map[string]any)["title"] = "changed details"
second := prepared.Details()
if second.Messages[0].Content != "Input=original artifact Label=original variable" {
t.Fatalf("details message changed: %q", second.Messages[0].Content)
}
if second.InputHashes["input"] != "original-input-hash" {
t.Fatalf("details input hash changed: %q", second.InputHashes["input"])
}
if second.EffectiveModelParams.Model != "original-model" ||
second.EffectiveModelParams.Temperature != 0.25 ||
second.EffectiveModelParams.ExtraParams["nested"].(map[string]any)["source"] != "original" {
t.Fatalf("details target changed: %+v", second.EffectiveModelParams)
}
schema := second.StructuredOutput.JSONSchema.Schema.(map[string]any)
if schema["title"] != "original root" {
t.Fatalf("details schema changed: %#v", schema)
}
result, err := engine.RunPrepared(context.Background(), prepared)
if err != nil {
t.Fatalf("run prepared after preparation-context cancellation: %v", err)
}
if result.Validation.Status != promptkit.ValidationPassed || !result.Validation.IsValid {
t.Fatalf("frozen schema did not validate original output: %+v", result.Validation)
}
if reader.callCount() != 1 {
t.Fatalf("execution reopened artifact source: calls=%d", reader.callCount())
}
requests := client.snapshot()
if len(requests) != 1 {
t.Fatalf("generation calls=%d, want 1", len(requests))
}
generated := requests[0]
if generated.Prompt.Messages[0].Content != second.Messages[0].Content ||
generated.Target.Model != second.EffectiveModelParams.Model ||
!reflect.DeepEqual(generated.Target.ExtraParams, second.EffectiveModelParams.ExtraParams) ||
!reflect.DeepEqual(generated.StructuredOutput, second.StructuredOutput) {
t.Fatalf("generation did not use frozen details:\nrequest=%+v\ndetails=%+v", generated, second)
}
if result.PromptID != second.PromptID ||
result.PromptVersion != second.PromptVersion ||
result.PromptHash != second.PromptHash ||
result.SessionID != second.SessionID ||
result.RenderedPromptHash != second.RenderedPromptHash ||
result.SelectedProfileID != second.SelectedProfileID ||
result.SelectedBackendID != second.SelectedBackendID ||
!reflect.DeepEqual(result.EffectiveModelParams, second.EffectiveModelParams) ||
!reflect.DeepEqual(result.InputHashes, second.InputHashes) {
t.Fatalf("result provenance does not match details:\nresult=%+v\ndetails=%+v", result, second)
}
}
func TestPreparedExecutionLifecycleAndEngineBinding(t *testing.T) {
ownerClient := &preparedRecordingClient{
response: &promptkit.GenerateResponse{Content: "ok"},
}
owner := newPreparedContractEngine(t, ownerClient, "owner content")
foreign := newPreparedContractEngine(t, &preparedRecordingClient{
response: &promptkit.GenerateResponse{Content: "unexpected"},
}, "foreign content")
prepared, err := owner.PrepareExecution(context.Background(), promptkit.RunRequest{PromptID: "prepared"})
if err != nil {
t.Fatalf("prepare execution: %v", err)
}
copied := *prepared
var nilEngine *promptkit.Engine
if result, err := nilEngine.RunPrepared(context.Background(), prepared); result != nil ||
!errors.Is(err, promptkit.ErrInvalidConfig) {
t.Fatalf("nil engine result=(%+v, %v), want ErrInvalidConfig", result, err)
}
if result, err := foreign.RunPrepared(context.Background(), prepared); result != nil ||
!errors.Is(err, promptkit.ErrInvalidRequest) {
t.Fatalf("foreign engine result=(%+v, %v), want ErrInvalidRequest", result, err)
}
if result, err := owner.RunPrepared(context.Background(), nil); result != nil ||
!errors.Is(err, promptkit.ErrInvalidRequest) {
t.Fatalf("nil handle result=(%+v, %v), want ErrInvalidRequest", result, err)
}
if result, err := owner.RunPrepared(context.Background(), &promptkit.PreparedExecution{}); result != nil ||
!errors.Is(err, promptkit.ErrInvalidRequest) {
t.Fatalf("zero handle result=(%+v, %v), want ErrInvalidRequest", result, err)
}
result, err := owner.RunPrepared(context.Background(), &copied)
if err != nil || result == nil {
t.Fatalf("owner run prepared=(%+v, %v), want success", result, err)
}
for name, handle := range map[string]*promptkit.PreparedExecution{
"original": prepared,
"copy": &copied,
} {
if result, err := owner.RunPrepared(context.Background(), handle); result != nil ||
!errors.Is(err, promptkit.ErrInvalidRequest) {
t.Fatalf("%s reused handle result=(%+v, %v), want ErrInvalidRequest", name, result, err)
}
if handle.Details().PromptID != "prepared" {
t.Fatalf("%s details unavailable after execution", name)
}
}
if len(ownerClient.snapshot()) != 1 {
t.Fatalf("owner generation calls=%d, want 1", len(ownerClient.snapshot()))
}
collaboratorFailure := errors.New("prepared collaborator failure")
failingClient := &preparedRecordingClient{err: collaboratorFailure}
failingEngine := newPreparedContractEngine(t, failingClient, "failure content")
failing, err := failingEngine.PrepareExecution(context.Background(), promptkit.RunRequest{PromptID: "prepared"})
if err != nil {
t.Fatalf("prepare failing execution: %v", err)
}
if result, err := failingEngine.RunPrepared(context.Background(), failing); result != nil ||
!errors.Is(err, promptkit.ErrLLMGenerate) ||
!errors.Is(err, collaboratorFailure) {
t.Fatalf("generation failure result=(%+v, %v), want public and collaborator identities", result, err)
}
if result, err := failingEngine.RunPrepared(context.Background(), failing); result != nil ||
!errors.Is(err, promptkit.ErrInvalidRequest) {
t.Fatalf("failed execution was reusable: result=(%+v, %v)", result, err)
}
cancellationRelease := make(chan struct{})
cancellationStarted := make(chan struct{}, 1)
cancelingEngine := newPreparedContractEngine(t, &preparedRecordingClient{
response: &promptkit.GenerateResponse{Content: "unexpected"},
started: cancellationStarted,
release: cancellationRelease,
}, "cancellation content")
canceling, err := cancelingEngine.PrepareExecution(
context.Background(),
promptkit.RunRequest{PromptID: "prepared"},
)
if err != nil {
t.Fatalf("prepare canceled execution: %v", err)
}
executionContext, cancelExecution := context.WithCancel(context.Background())
type canceledOutcome struct {
result *promptkit.RunResult
err error
}
canceledResult := make(chan canceledOutcome, 1)
go func() {
result, runErr := cancelingEngine.RunPrepared(executionContext, canceling)
canceledResult <- canceledOutcome{result: result, err: runErr}
}()
select {
case <-cancellationStarted:
case <-time.After(5 * time.Second):
t.Fatal("timed out waiting for cancelable generation")
}
cancelExecution()
select {
case outcome := <-canceledResult:
if outcome.result != nil ||
!errors.Is(outcome.err, promptkit.ErrLLMGenerate) ||
!errors.Is(outcome.err, context.Canceled) {
t.Fatalf(
"canceled execution=(%+v, %v), want generation and context identities",
outcome.result,
outcome.err,
)
}
case <-time.After(5 * time.Second):
t.Fatal("timed out waiting for canceled execution")
}
if result, err := cancelingEngine.RunPrepared(context.Background(), canceling); result != nil ||
!errors.Is(err, promptkit.ErrInvalidRequest) {
t.Fatalf("canceled execution was reusable: result=(%+v, %v)", result, err)
}
}
func TestPreparedExecutionConcurrentClaimAllowsOneGeneration(t *testing.T) {
release := make(chan struct{})
client := &preparedRecordingClient{
response: &promptkit.GenerateResponse{Content: "ok"},
started: make(chan struct{}, 1),
release: release,
}
engine := newPreparedContractEngine(t, client, "concurrent content")
prepared, err := engine.PrepareExecution(context.Background(), promptkit.RunRequest{PromptID: "prepared"})
if err != nil {
t.Fatalf("prepare execution: %v", err)
}
type outcome struct {
result *promptkit.RunResult
err error
}
outcomes := make(chan outcome, 2)
for i := 0; i < 2; i++ {
go func() {
result, runErr := engine.RunPrepared(context.Background(), prepared)
outcomes <- outcome{result: result, err: runErr}
}()
}
select {
case <-client.started:
case <-time.After(5 * time.Second):
t.Fatal("timed out waiting for generation")
}
select {
case loser := <-outcomes:
if loser.result != nil || !errors.Is(loser.err, promptkit.ErrInvalidRequest) {
t.Fatalf("concurrent loser=(%+v, %v), want ErrInvalidRequest", loser.result, loser.err)
}
case <-time.After(5 * time.Second):
t.Fatal("timed out waiting for rejected concurrent claim")
}
close(release)
select {
case winner := <-outcomes:
if winner.err != nil || winner.result == nil {
t.Fatalf("concurrent winner=(%+v, %v), want success", winner.result, winner.err)
}
case <-time.After(5 * time.Second):
t.Fatal("timed out waiting for successful concurrent claim")
}
if len(client.snapshot()) != 1 {
t.Fatalf("generation calls=%d, want 1", len(client.snapshot()))
}
}
func TestPreparedExecutionRunAndDiscardRaceHasOneWinner(t *testing.T) {
const attempts = 32
for i := 0; i < attempts; i++ {
client := &preparedRecordingClient{
response: &promptkit.GenerateResponse{Content: "ok"},
}
engine := newPreparedContractEngine(t, client, "race content")
prepared, err := engine.PrepareExecution(
context.Background(),
promptkit.RunRequest{PromptID: "prepared"},
)
if err != nil {
t.Fatalf("attempt %d prepare execution: %v", i, err)
}
start := make(chan struct{})
type outcome struct {
result *promptkit.RunResult
err error
}
runOutcome := make(chan outcome, 1)
discardDone := make(chan struct{})
go func() {
<-start
result, runErr := engine.RunPrepared(context.Background(), prepared)
runOutcome <- outcome{result: result, err: runErr}
}()
go func() {
<-start
prepared.Discard()
close(discardDone)
}()
close(start)
runResult := <-runOutcome
<-discardDone
calls := len(client.snapshot())
switch {
case runResult.err == nil:
if runResult.result == nil || calls != 1 {
t.Fatalf(
"attempt %d run won with outcome=(%+v, %v), generation calls=%d",
i,
runResult.result,
runResult.err,
calls,
)
}
case errors.Is(runResult.err, promptkit.ErrInvalidRequest):
if runResult.result != nil || calls != 0 {
t.Fatalf(
"attempt %d discard won with outcome=(%+v, %v), generation calls=%d",
i,
runResult.result,
runResult.err,
calls,
)
}
default:
t.Fatalf("attempt %d unexpected run outcome=(%+v, %v)", i, runResult.result, runResult.err)
}
if prepared.Details().PromptID != "prepared" {
t.Fatalf("attempt %d details unavailable after race", i)
}
}
}
func TestPreparedExecutionDiscardAndFormattingDoNotExposePrivateState(t *testing.T) {
const (
directCredential = "pk-test-direct-credential-41f7"
renderedContent = "rendered-content-sentinel-98d2"
)
client := &preparedRecordingClient{
response: &promptkit.GenerateResponse{Content: "generated output"},
}
engine, err := promptkit.NewEngine(
promptkit.Config{},
promptkit.WithPromptFS(contractPromptFS("prepared", "profile", renderedContent), "."),
promptkit.WithProfiles(promptkit.Profile{
ID: "profile",
Endpoint: "http://example.test/v1",
Model: "model",
APIKeyRequired: true,
}),
promptkit.WithLLMClient(client),
)
if err != nil {
t.Fatalf("construct engine: %v", err)
}
prepared, err := engine.PrepareExecution(context.Background(), promptkit.RunRequest{
PromptID: "prepared",
APIKey: directCredential,
})
if err != nil {
t.Fatalf("prepare execution: %v", err)
}
formattedValues := []string{
fmt.Sprint(prepared),
fmt.Sprintf("%+v", prepared),
fmt.Sprintf("%#v", prepared),
}
for _, formatted := range formattedValues {
if formatted != "promptkit.PreparedExecution{opaque}" {
t.Fatalf("unexpected opaque formatting: %q", formatted)
}
assertPreparedPrivateValuesAbsent(t, formatted, directCredential, renderedContent)
}
payload, err := json.Marshal(prepared)
if err != nil {
t.Fatalf("marshal opaque handle: %v", err)
}
assertPreparedPrivateValuesAbsent(t, string(payload), directCredential, renderedContent)
detailsBefore := prepared.Details()
detailsJSON, err := json.Marshal(detailsBefore)
if err != nil {
t.Fatalf("marshal prepared details: %v", err)
}
assertPreparedPrivateValuesAbsent(t, string(detailsJSON), directCredential)
prepared.Discard()
prepared.Discard()
result, lifecycleErr := engine.RunPrepared(context.Background(), prepared)
if result != nil || !errors.Is(lifecycleErr, promptkit.ErrInvalidRequest) {
t.Fatalf("discarded execution result=(%+v, %v), want ErrInvalidRequest", result, lifecycleErr)
}
assertPreparedPrivateValuesAbsent(t, lifecycleErr.Error(), directCredential, renderedContent)
if !reflect.DeepEqual(prepared.Details(), detailsBefore) {
t.Fatal("details changed after discard")
}
executed, err := engine.PrepareExecution(context.Background(), promptkit.RunRequest{
PromptID: "prepared",
APIKey: directCredential,
})
if err != nil {
t.Fatalf("prepare execution for request inspection: %v", err)
}
executionResult, err := engine.RunPrepared(context.Background(), executed)
if err != nil {
t.Fatalf("run execution for request inspection: %v", err)
}
requests := client.snapshot()
if len(requests) != 1 || requests[0].APIKey != directCredential {
t.Fatalf("direct credential did not reach only the client credential field: %#v", requests)
}
requestJSON, err := json.Marshal(requests[0])
if err != nil {
t.Fatalf("marshal captured generate request: %v", err)
}
for _, value := range []string{
fmt.Sprint(requests[0]),
fmt.Sprintf("%+v", requests[0]),
fmt.Sprintf("%#v", requests[0]),
string(requestJSON),
fmt.Sprint(executionResult),
} {
assertPreparedPrivateValuesAbsent(t, value, directCredential)
}
resultJSON, err := json.Marshal(executionResult)
if err != nil {
t.Fatalf("marshal execution result: %v", err)
}
assertPreparedPrivateValuesAbsent(t, string(resultJSON), directCredential)
var nilHandle *promptkit.PreparedExecution
nilHandle.Discard()
if !reflect.DeepEqual(nilHandle.Details(), promptkit.PreparedRun{}) {
t.Fatalf("nil handle details=%+v, want zero value", nilHandle.Details())
}
zeroHandle := &promptkit.PreparedExecution{}
zeroHandle.Discard()
if !reflect.DeepEqual(zeroHandle.Details(), promptkit.PreparedRun{}) {
t.Fatalf("zero handle details=%+v, want zero value", zeroHandle.Details())
}
}
func TestPreparedExecutionCredentialCapacityAndTimingBoundaries(t *testing.T) {
t.Run("credential is rechecked before generation", func(t *testing.T) {
const (
environmentName = "PROMPTKIT_PREPARED_CONTRACT_KEY"
environmentKey = "environment-credential-sentinel"
)
t.Setenv(environmentName, environmentKey)
client := &preparedRecordingClient{
response: &promptkit.GenerateResponse{Content: "unexpected"},
}
engine, err := promptkit.NewEngine(
promptkit.Config{},
promptkit.WithPromptFS(contractPromptFS("prepared", "profile", "content"), "."),
promptkit.WithProfileFS(preparedCredentialProfileSource(environmentName), "."),
promptkit.WithLLMClient(client),
)
if err != nil {
t.Fatalf("construct credential engine: %v", err)
}
prepared, err := engine.PrepareExecution(context.Background(), promptkit.RunRequest{PromptID: "prepared"})
if err != nil {
t.Fatalf("prepare credential execution: %v", err)
}
if err := os.Unsetenv(environmentName); err != nil {
t.Fatalf("unset credential environment: %v", err)
}
result, err := engine.RunPrepared(context.Background(), prepared)
if result != nil ||
!errors.Is(err, promptkit.ErrInvalidRequest) ||
!errors.Is(err, promptkit.ErrAPIKeyEnvMissing) {
t.Fatalf("credential execution=(%+v, %v), want credential identities", result, err)
}
if len(client.snapshot()) != 0 {
t.Fatalf("credential failure reached generation: %d calls", len(client.snapshot()))
}
assertPreparedPrivateValuesAbsent(t, err.Error(), environmentKey)
if result, err := engine.RunPrepared(context.Background(), prepared); result != nil ||
!errors.Is(err, promptkit.ErrInvalidRequest) {
t.Fatalf("credential failure did not consume handle: result=(%+v, %v)", result, err)
}
})
t.Run("preparation does not admit and execution timing starts after retention", func(t *testing.T) {
release := make(chan struct{})
client := newCapacityGateClient(release, 4)
engine := newBackendCapacityEngine(t, client, 1, capacityInt(0), nil)
activeRun := make(chan capacityRunResult, 1)
go runCapacityRequest(
engine,
context.Background(),
promptkit.RunRequest{PromptID: "prompt"},
activeRun,
)
awaitCapacityRequest(t, client.started)
prepared, err := engine.PrepareExecution(
context.Background(),
promptkit.RunRequest{PromptID: "prompt"},
)
if err != nil {
t.Fatalf("prepare while capacity is full: %v", err)
}
if _, _, calls := client.snapshot(); calls != 1 {
t.Fatalf("preparation invoked generation: calls=%d", calls)
}
if result, err := engine.RunPrepared(context.Background(), prepared); result != nil ||
!errors.Is(err, promptkit.ErrCapacityExceeded) {
t.Fatalf("capacity execution=(%+v, %v), want ErrCapacityExceeded", result, err)
}
if result, err := engine.RunPrepared(context.Background(), prepared); result != nil ||
!errors.Is(err, promptkit.ErrInvalidRequest) {
t.Fatalf("capacity rejection did not consume handle: result=(%+v, %v)", result, err)
}
if prepared.Details().PromptID != "prompt" {
t.Fatal("details unavailable after capacity rejection")
}
close(release)
activeOutcome := awaitCapacityRun(t, activeRun)
if activeOutcome.err != nil || activeOutcome.result == nil {
t.Fatalf("active run outcome=(%+v, %v), want success", activeOutcome.result, activeOutcome.err)
}
timed, err := engine.PrepareExecution(
context.Background(),
promptkit.RunRequest{PromptID: "prompt"},
)
if err != nil {
t.Fatalf("prepare timed execution: %v", err)
}
details := timed.Details()
time.Sleep(25 * time.Millisecond)
executionFloor := time.Now().UTC()
result, err := engine.RunPrepared(context.Background(), timed)
if err != nil {
t.Fatalf("run timed execution: %v", err)
}
if result.StartTime.Before(executionFloor) ||
!result.StartTime.After(details.EndTime) ||
result.EndTime.Before(result.StartTime) ||
result.Duration != result.EndTime.Sub(result.StartTime) {
t.Fatalf(
"execution timing includes preparation or retention: details_end=%s floor=%s result=%+v",
details.EndTime,
executionFloor,
result,
)
}
if _, _, calls := client.snapshot(); calls != 2 {
t.Fatalf("generation calls=%d, want active and timed executions only", calls)
}
})
}
type mutablePreparedArtifactReader struct {
mu sync.Mutex
body string
hash string
calls int
}
func (r *mutablePreparedArtifactReader) Read(
_ context.Context,
_ promptkit.ArtifactRef,
) (*promptkit.Artifact, error) {
r.mu.Lock()
defer r.mu.Unlock()
r.calls++
return &promptkit.Artifact{
Body: []byte(r.body),
Hash: r.hash,
}, nil
}
func (r *mutablePreparedArtifactReader) set(body, hash string) {
r.mu.Lock()
defer r.mu.Unlock()
r.body = body
r.hash = hash
}
func (r *mutablePreparedArtifactReader) callCount() int {
r.mu.Lock()
defer r.mu.Unlock()
return r.calls
}
type preparedRecordingClient struct {
mu sync.Mutex
response *promptkit.GenerateResponse
err error
requests []promptkit.GenerateRequest
started chan struct{}
release <-chan struct{}
}
func (c *preparedRecordingClient) Generate(
ctx context.Context,
request promptkit.GenerateRequest,
) (*promptkit.GenerateResponse, error) {
c.mu.Lock()
c.requests = append(c.requests, request)
c.mu.Unlock()
if c.started != nil {
c.started <- struct{}{}
}
if c.release != nil {
select {
case <-c.release:
case <-ctx.Done():
return nil, ctx.Err()
}
}
if c.err != nil {
return nil, c.err
}
return c.response, nil
}
func (c *preparedRecordingClient) snapshot() []promptkit.GenerateRequest {
c.mu.Lock()
defer c.mu.Unlock()
return append([]promptkit.GenerateRequest(nil), c.requests...)
}
func newPreparedContractEngine(
t *testing.T,
client promptkit.LLMClient,
message string,
) *promptkit.Engine {
t.Helper()
engine, err := promptkit.NewEngine(
promptkit.Config{},
promptkit.WithPromptFS(contractPromptFS("prepared", "profile", message), "."),
promptkit.WithProfiles(promptkit.Profile{
ID: "profile",
Endpoint: "http://example.test/v1",
Model: "model",
}),
promptkit.WithLLMClient(client),
)
if err != nil {
t.Fatalf("construct prepared execution engine: %v", err)
}
return engine
}
func preparedPromptSource(label string) fstest.MapFS {
return fstest.MapFS{
"prompt.yaml": &fstest.MapFile{Data: []byte(`id: prepared
version: "1"
default_profile: profile
inputs:
- name: input
required: true
messages:
- role: user
content: 'Input={{input "input"}} Label={{.label}}'
description: ` + label + `
output:
format: json
validation_mode: json_schema
schema_path: schema.json
`)},
}
}
func preparedProfileSource(model string) fstest.MapFS {
return fstest.MapFS{
"profile.yaml": &fstest.MapFile{Data: []byte(`id: profile
endpoint: http://example.test/v1
model: ` + model + `
`)},
}
}
func preparedCredentialProfileSource(environmentName string) fstest.MapFS {
return fstest.MapFS{
"profile.yaml": &fstest.MapFile{Data: []byte(`id: profile
endpoint: http://example.test/v1
model: model
api_key_env: ` + environmentName + `
`)},
}
}
func preparedSchemaSource() fstest.MapFS {
return fstest.MapFS{
"schema.json": &fstest.MapFile{Data: []byte(`{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "original root",
"type": "object",
"required": ["value"],
"properties": {
"value": {"$ref": "value.json"}
}
}`)},
"value.json": &fstest.MapFile{Data: []byte(`{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "integer",
"minimum": 2
}`)},
}
}
func assertPreparedPrivateValuesAbsent(t *testing.T, value string, privateValues ...string) {
t.Helper()
for _, privateValue := range privateValues {
if strings.Contains(value, privateValue) {
t.Fatalf("value exposed private data %q: %s", privateValue, value)
}
}
}

View File

@@ -51,7 +51,8 @@ const (
// ValidationPassed means the generated output satisfied its contract.
ValidationPassed ValidationStatus = "passed"
// ValidationFailed means validation completed and rejected the generated
// output. Engine.Run returns this status in a result, not as an error.
// output. Engine.Run and Engine.RunPrepared return this status in a result,
// not as an error.
ValidationFailed ValidationStatus = "failed"
// ValidationSkipped means ValidationNone selected no content check.
ValidationSkipped ValidationStatus = "skipped"
@@ -78,9 +79,10 @@ const (
// RunRequest selects one prompt execution. It has no stable JSON
// representation.
//
// Prepare and Run copy the request's maps, pointers, and nested
// JSON-compatible values before using them. The caller may mutate the request
// after either method returns.
// Prepare, PrepareExecution, and Run copy the request's maps, pointers, and
// nested JSON-compatible values before using them. The caller may mutate the
// request after any method returns. A successful PrepareExecution retains its
// own private execution snapshot for RunPrepared.
type RunRequest struct {
// PromptID is the required non-empty prompt identifier.
PromptID string
@@ -98,12 +100,14 @@ type RunRequest struct {
// opaque consumer metadata, not a credential, and may be exposed in
// prepared values, results, collaborator requests, provider requests, and
// provider observability. Callers should use stable, non-sensitive
// identifiers. An overlong direct value makes Prepare or Run return an
// error matching ErrInvalidRequest.
// identifiers. An overlong direct value makes Prepare, PrepareExecution, or
// Run return an error matching ErrInvalidRequest.
SessionID string
// APIKey is a request-scoped direct credential. It takes precedence over
// APIKeyEnv, is passed to the selected LLMClient, and is never included in
// prepared values, results, hashes, JSON, String, or GoString output.
// prepared values, results, hashes, JSON, String, or GoString output. A
// successful PrepareExecution retains it only in the opaque handle until
// RunPrepared claims the handle or Discard invalidates it.
APIKey string `json:"-"`
// Inputs maps prompt input names to references. A nil or empty map is valid
// only when the selected prompt and its templates require no inputs.
@@ -119,9 +123,10 @@ type RunRequest struct {
Validation *OutputContract
}
// PreparedRun contains prepared prompt execution state. It does not include
// resolved API key values, model output, validation results, or internal target
// presence metadata. PreparedRun has a stable JSON representation.
// PreparedRun contains prepared prompt execution state returned by
// [Engine.Prepare] or [PreparedExecution.Details]. It does not include resolved
// API key values, model output, validation results, or internal target presence
// metadata. PreparedRun has a stable JSON representation.
//
// All maps, slices, pointers, and schema values are caller-owned copies. JSON
// timestamps use RFC 3339 and zero timing values are omitted. Hash formats are
@@ -154,7 +159,8 @@ type PreparedRun struct {
SessionID string `json:"session_id,omitempty"`
// RenderedPromptHash is an opaque equality value for SessionID and Messages.
RenderedPromptHash string `json:"rendered_prompt_hash"`
// Messages are the rendered messages that Run passes to the LLM client.
// Messages are the rendered messages that Run or RunPrepared passes to the
// LLM client.
Messages []RenderedMessage `json:"messages"`
// StartTime is the UTC time at which preparation began.
StartTime time.Time `json:"start_time,omitempty"`
@@ -214,12 +220,15 @@ type RunResult struct {
InputHashes map[string]string `json:"input_hashes,omitempty"`
// Usage is the token accounting reported by the LLM client.
Usage TokenUsage `json:"usage"`
// StartTime is the UTC time immediately before preparation begins.
// StartTime is the UTC time immediately before ordinary Run preparation or
// after RunPrepared claims its handle.
StartTime time.Time `json:"start_time,omitempty"`
// EndTime is the UTC time after generation and validation complete.
EndTime time.Time `json:"end_time,omitempty"`
// Duration covers preparation, generation, and validation. JSON represents
// it as integer milliseconds in duration_ms and omits a zero value.
// Duration covers preparation, generation, and validation for Run. For
// RunPrepared it covers only the execution attempt after claim and excludes
// preparation and consumer-held delay. JSON represents it as integer
// milliseconds in duration_ms and omits a zero value.
Duration time.Duration `json:"-"`
}
@@ -259,10 +268,11 @@ type Artifact struct {
// ArtifactReader resolves a prompt input reference into its content.
//
// Read may be called concurrently. It must honor ctx cancellation to make
// Prepare and Run responsive to cancellation. The engine passes a copied ref
// and immediately copies the returned Artifact.Body; it does not retain either
// value. Readers supply artifact metadata, and the engine assigns an input-map
// name only when the returned artifact name is empty.
// Prepare, PrepareExecution, and Run responsive to cancellation. The engine
// passes a copied ref and immediately copies the returned Artifact.Body; it
// does not retain either value. Readers supply artifact metadata, and the
// engine assigns an input-map name only when the returned artifact name is
// empty.
//
// An injected reader owns any application-specific path containment,
// authorization, content-size, and content-type policy. It must protect
@@ -559,25 +569,26 @@ type StructuredOutputJSONSpec struct {
Schema any `json:"schema"`
}
// LLMClient executes rendered prompts for [Engine.Run].
// LLMClient executes rendered prompts for [Engine.Run] and
// [Engine.RunPrepared].
//
// Generate is scheduled according to the resolved backend's capacity policy.
// It may still be called concurrently for different backend pools or unlimited
// backends. Cancellation while waiting for capacity can prevent Generate from
// being called. Once invoked, it must honor context cancellation to make Run
// responsive to cancellation. The request and all nested maps, slices, and
// pointers are client-owned copies and may be mutated or retained without
// affecting engine state.
// and RunPrepared responsive to cancellation. The request and all nested maps,
// slices, and pointers are client-owned copies and may be mutated or retained
// without affecting engine state.
//
// Generate receives rendered messages and may receive a direct API key. A
// client must protect those values and any raw output in its logging, storage,
// and retained copies. It is responsible for the cancellation behavior of any
// work it starts and for synchronizing access to retained or shared data.
//
// A returned error makes Run return ErrLLMGenerate while preserving the client
// error through errors.Is. A nil response with a nil error also produces
// ErrLLMGenerate. Promptkit copies the non-nil response before returning from
// Run.
// A returned error makes Run or RunPrepared return ErrLLMGenerate while
// preserving the client error through errors.Is. A nil response with a nil
// error also produces ErrLLMGenerate. Promptkit copies the non-nil response
// before returning from either method.
type LLMClient interface {
Generate(context.Context, GenerateRequest) (*GenerateResponse, error)
}