Organize D&D extensions by domain

docs/internal/llm.md

@@ -80,7 +80,9 @@ configuration facts in [Configuration](../config.md#defaults).
 `AssetRegistry` combines caller-owned prompt filesystems under stable prefixes
 and rejects invalid or conflicting registrations. Production module packages
 register their own prompt and schema assets; generic framework code contains no
-D&D prompt content.
+D&D prompt content. `internal/framework/promptfs` provides the domain-neutral
+filesystem composition helper used to combine module-owned files with shared
+domain prompt fragments.
 
 Schema helpers load embedded JSON Schema with identity and digest metadata,
 return defensive copies, and expose a diagnostics map that omits schema bytes.

docs/internal/modules.md

@@ -1,7 +1,7 @@
 # Module And Validator Internals
 
-Production module implementations and generic validators live under
-`internal/modules`; the current D&D validators live under `internal/validators`.
+Production module and validator implementations live under their domain-first
+trees in `internal/modules`.
 The selectable keys, configuration options, reference slots, and default
 validator chain are canonical in the
 [module](../config.md#implemented-production-modules) and
@@ -26,10 +26,10 @@ that agreement. Runtime delivery uses the corresponding stage request's
 
 LLM-backed extensions own their prompt definitions and response schemas under
 package-local embedded assets. Shared filesystem composition belongs in
-`internal/modules/sharedassets`; reusable D&D prompt fragments, reference
+`internal/framework/promptfs`; reusable D&D prompt fragments, reference
 declarations, prompt-input assembly, and source-unit helpers belong in
-`internal/modules/sharedassets/dnd`. Stage contracts expose only Notarius
-structured-completion types, not Scriptorium public types.
+`internal/modules/dnd/shared`. Stage contracts expose only Notarius structured-
+completion types, not Scriptorium public types.
 
 Reference material may inform a module or prompt but must not become source
 evidence. The resolver and materializer behavior is described in
@@ -62,7 +62,7 @@ The accepted options and defaults are defined in
 [Configuration](../config.md#implemented-production-modules). Generic
 framework validation canonicalizes the returned unit slices before extraction.
 
-### `internal/modules/chunk/dnd/scenes`
+### `internal/modules/dnd/chunk/scenes`
 
 The scene chunker prepares a structured Scriptorium request from the full
 transcript, session, and optional D&D reference inputs. It validates the model's
@@ -82,7 +82,7 @@ file types remain canonical in [Configuration](../config.md).
 
 ## Extractor
 
-### `internal/modules/extract/dnd/spells`
+### `internal/modules/dnd/extract/spells`
 
 The spell extractor prepares a structured request from one chunk, the
 chunk-scoped source input, the session, and optional D&D reference inputs. It
@@ -141,7 +141,7 @@ from schema loading or compilation errors. Neither validator calls the LLM.
 
 ## D&D Spell Validators
 
-`internal/validators/extract/dnd/spells/spellpayload` provides strict decoding,
+`internal/modules/dnd/validate/spells/spellpayload` provides strict decoding,
 shape checks, source-reference candidates, and cited-text lookup shared by the
 three validators.
 
@@ -199,5 +199,7 @@ does not inventory implementations.
   defaults.
 - `internal/cli/run_test.go`: production catalog, config resolution, and
   end-to-end CLI composition.
-- `internal/modules/sharedassets/**/*_test.go`: shared prompt and reference
-  assembly.
+- `internal/framework/promptfs/*_test.go` and
+  `internal/modules/dnd/shared/*_test.go`: shared prompt and reference assembly.
+- `internal/modules/integration/*_test.go`: black-box composition across
+  production extension domains.

docs/internal/overview.md

@@ -42,6 +42,7 @@ a sorted set of artifact lanes before the runner constructs any stage module.
 | `internal/framework/pipeline` | Registries, profile resolution, capability checks, reference materialization, validator-chain resolution, retries, orchestration, warnings, and manifest population. |
 | `internal/framework/validate` | Shared validator decision and cardinality helpers. |
 | `internal/framework/llm` | Scriptorium-backed structured completions, prompt/schema registration, scheduling, profile recording, and secret redaction. |
+| `internal/framework/promptfs` | Builds module prompt filesystems from module-owned and caller-provided shared prompt assets. |
 | `internal/framework/checkpoint` | Workspace-backed checkpoint loading, recording, and payload serialization. |
 | `internal/framework/debug` | Workspace-backed framework and LLM debug recording. |
 
@@ -60,26 +61,25 @@ Configuration. The implemented module packages are:
 | --- | --- |
 | `internal/modules/seriatim/input/transcript` | Parses the supported Seriatim transcript format into the generic source model. |
 | `internal/modules/generic/chunk/units` | Splits ordered source units by unit count and overlap. |
-| `internal/modules/chunk/dnd/scenes` | Produces contiguous D&D scene chunks from structured model output. |
-| `internal/modules/extract/dnd/spells` | Produces source-grounded D&D spell-cast raw output. |
+| `internal/modules/dnd/chunk/scenes` | Produces contiguous D&D scene chunks from structured model output. |
+| `internal/modules/dnd/extract/spells` | Produces source-grounded D&D spell-cast raw output. |
 | `internal/modules/generic/merge/appendorder` | Combines accepted extraction results in chunk order. |
 | `internal/modules/generic/normalize/noop` | Preserves accepted merged output. |
 | `internal/modules/generic/output/json` | Encodes manifests, lane payloads, warnings, and rejections as logical JSON files. |
 
-`internal/modules/sharedassets` composes shared prompt filesystems.
-`internal/modules/sharedassets/dnd` owns reusable D&D prompt fragments,
+`internal/modules/dnd/shared` owns reusable D&D prompt fragments,
 reference declarations, prompt input assembly, and source-unit reference
-helpers.
+helpers. Domain-neutral prompt filesystem composition lives in
+`internal/framework/promptfs`.
 
 Generic validators under `internal/modules/generic/validate` provide
 unconditional test decisions, JSON syntax validation, and JSON Schema
-validation. D&D spell validators remain under `internal/validators` and provide
-shape, source-reference, and source-relatedness decisions, with `spellpayload`
-holding their shared parser and lookup helpers.
+validation. D&D spell validators under `internal/modules/dnd/validate/spells`
+provide shape, source-reference, and source-relatedness decisions, with
+`spellpayload` holding their shared parser and lookup helpers.
 
-Production composition is grouped behind package-family registrars. Generic
-and Seriatim implementations use their domain-first trees; D&D implementations
-remain in their current stage-oriented packages:
+Production composition is grouped behind package-family registrars, and every
+implemented production extension uses its domain-first tree:
 
 | Package | Implemented responsibility |
 | --- | --- |

internal/cli/compatibility_test.go

@@ -18,13 +18,13 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	frameworkllm "gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/chunk/dnd/scenes"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/extract/dnd/spells"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/chunk/scenes"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/spells"
+	spellshape "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/shape"
+	spellsourcerefs "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/source_refs"
+	spellrelatedness "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/source_relatedness"
 	validjson "gitea.maximumdirect.net/eric/notarius/internal/modules/generic/validate/valid_json"
 	validjsonschema "gitea.maximumdirect.net/eric/notarius/internal/modules/generic/validate/valid_json_schema"
-	spellshape "gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/shape"
-	spellsourcerefs "gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/source_refs"
-	spellrelatedness "gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/source_relatedness"
 )
 
 func TestProductionCompatibilitySnapshot(t *testing.T) {

internal/cli/run_test.go

@@ -22,8 +22,11 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/chunk/dnd/scenes"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/extract/dnd/spells"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/chunk/scenes"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/spells"
+	spellshape "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/shape"
+	spellsourcerefs "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/source_refs"
+	spellrelatedness "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/source_relatedness"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/generic/chunk/units"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/generic/merge/appendorder"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/generic/normalize/noop"
@@ -33,9 +36,6 @@ import (
 	validjson "gitea.maximumdirect.net/eric/notarius/internal/modules/generic/validate/valid_json"
 	validjsonschema "gitea.maximumdirect.net/eric/notarius/internal/modules/generic/validate/valid_json_schema"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/seriatim/input/transcript"
-	spellshape "gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/shape"
-	spellsourcerefs "gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/source_refs"
-	spellrelatedness "gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/source_relatedness"
 	"gitea.maximumdirect.net/eric/scriptorium"
 )
 

internal/framework/promptfs/prompt_fs.go

@@ -1,4 +1,4 @@
-package sharedassets
+package promptfs
 
 import (
 	"bytes"

internal/framework/promptfs/prompt_fs_test.go

@@ -1,4 +1,4 @@
-package sharedassets
+package promptfs
 
 import (
 	"io/fs"

internal/modules/chunk/dnd/scenes/model.go

@@ -1,30 +0,0 @@
-package scenes
-
-import "gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets/dnd"
-
-type chunkResponse struct {
-	Scenes          []sceneResponse `json:"scenes"`
-	BoundaryCaveats []string        `json:"boundary_caveats"`
-}
-
-type sceneResponse struct {
-	StartUnitID        dnd.UnitRef `json:"start_unit_id"`
-	EndUnitID          dnd.UnitRef `json:"end_unit_id"`
-	ShortTitle         string      `json:"short_title"`
-	PrimaryMode        string      `json:"primary_mode"`
-	MainParticipants   []string    `json:"main_participants"`
-	Summary            string      `json:"summary"`
-	BoundaryNote       string      `json:"boundary_note"`
-	BoundaryConfidence string      `json:"boundary_confidence"`
-}
-
-type normalizedScene struct {
-	StartUnitID        int
-	EndUnitID          int
-	ShortTitle         string
-	PrimaryMode        string
-	MainParticipants   []string
-	Summary            string
-	BoundaryNote       string
-	BoundaryConfidence string
-}

internal/modules/dnd/chunk/scenes/chunker.go

@@ -9,7 +9,7 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets/dnd"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
 )
 
 const Key = "dnd/scenes"
@@ -23,7 +23,7 @@ var providedCapabilities = []string{
 	"chunks.scenes",
 }
 
-var referenceSlotDescriptions = dnd.ReferenceSlotDescriptions{
+var referenceSlotDescriptions = shared.ReferenceSlotDescriptions{
 	Glossary: "Optional campaign glossary reference material used only for scene disambiguation.",
 	Party:    "Optional party roster reference material used only for scene disambiguation.",
 	Players:  "Optional player list reference material used only for scene disambiguation.",
@@ -44,7 +44,7 @@ func (c *Chunker) Key() string {
 }
 
 func (c *Chunker) ReferenceSlots() []contracts.ReferenceSlot {
-	return dnd.ReferenceSlots(referenceSlotDescriptions)
+	return shared.ReferenceSlots(referenceSlotDescriptions)
 }
 
 func (c *Chunker) ManifestMetadata() map[string]any {
@@ -100,7 +100,7 @@ func (c *Chunker) Chunk(ctx context.Context, req contracts.ChunkRequest) (contra
 		PromptVersion: ResponseSchemaVersion,
 		ProfileID:     req.LLMProfile,
 		SessionID:     req.SessionID,
-		Inputs:        dnd.PromptInputs(req.SourceInput, req.References),
+		Inputs:        shared.PromptInputs(req.SourceInput, req.References),
 	}, &response); err != nil {
 		return contracts.ChunkResult{}, chunkerErrorf("complete structured output: %w", err)
 	}
@@ -125,7 +125,7 @@ func ModuleSpec() pipeline.ModuleSpec {
 		Stage:          pipeline.StageChunk,
 		Requires:       append([]string(nil), requiredCapabilities...),
 		Provides:       append([]string(nil), providedCapabilities...),
-		ReferenceSlots: dnd.ReferenceSlots(referenceSlotDescriptions),
+		ReferenceSlots: shared.ReferenceSlots(referenceSlotDescriptions),
 	}
 }
 
@@ -228,11 +228,11 @@ func chunkContent(units []source.SourceUnit) ([]byte, error) {
 }
 
 func normalizeScene(doc *source.SourceDocument, index int, scene sceneResponse) (normalizedScene, error) {
-	startUnitID, err := dnd.ResolveUnitID(doc, "start_unit_id", scene.StartUnitID)
+	startUnitID, err := shared.ResolveUnitID(doc, "start_unit_id", scene.StartUnitID)
 	if err != nil {
 		return normalizedScene{}, fmt.Errorf("scene[%d] %w", index, err)
 	}
-	endUnitID, err := dnd.ResolveUnitID(doc, "end_unit_id", scene.EndUnitID)
+	endUnitID, err := shared.ResolveUnitID(doc, "end_unit_id", scene.EndUnitID)
 	if err != nil {
 		return normalizedScene{}, fmt.Errorf("scene[%d] %w", index, err)
 	}

internal/modules/dnd/chunk/scenes/chunker_test.go

@@ -11,7 +11,7 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets/dnd"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
 )
 
 func TestNewModuleSpecAndRegister(t *testing.T) {
@@ -105,8 +105,8 @@ func TestChunkReturnsSceneChunksFromStructuredOutput(t *testing.T) {
 		response: chunkResponse{
 			Scenes: []sceneResponse{
 				{
-					StartUnitID:        dnd.UnitRefFromInt(1),
-					EndUnitID:          dnd.UnitRefFromInt(2),
+					StartUnitID:        shared.UnitRefFromInt(1),
+					EndUnitID:          shared.UnitRefFromInt(2),
 					ShortTitle:         " Goblin parley ",
 					PrimaryMode:        "Discussion",
 					MainParticipants:   []string{" Aria ", "Goblin scout"},
@@ -115,8 +115,8 @@ func TestChunkReturnsSceneChunksFromStructuredOutput(t *testing.T) {
 					BoundaryConfidence: "High",
 				},
 				{
-					StartUnitID:        dnd.UnitRefFromInt(3),
-					EndUnitID:          dnd.UnitRefFromInt(4),
+					StartUnitID:        shared.UnitRefFromInt(3),
+					EndUnitID:          shared.UnitRefFromInt(4),
 					ShortTitle:         "Ambush at the gate",
 					PrimaryMode:        "Combat",
 					MainParticipants:   []string{"Aria", "Goblin ambushers"},
@@ -210,8 +210,8 @@ func TestChunkPassesReferencesAsPromptInputs(t *testing.T) {
 	client := &fakeScenesLLMClient{response: chunkResponse{
 		Scenes: []sceneResponse{
 			{
-				StartUnitID:        dnd.UnitRefFromInt(1),
-				EndUnitID:          dnd.UnitRefFromInt(4),
+				StartUnitID:        shared.UnitRefFromInt(1),
+				EndUnitID:          shared.UnitRefFromInt(4),
 				ShortTitle:         "Ambush",
 				PrimaryMode:        "Combat",
 				MainParticipants:   []string{"Aria"},
@@ -264,7 +264,7 @@ func TestChunkPassesReferencesAsPromptInputs(t *testing.T) {
 }
 
 func TestPromptInputsMapLegacyRosterReferenceToParty(t *testing.T) {
-	inputs := dnd.PromptInputs(sceneSourceInput(), contracts.ReferenceSet{
+	inputs := shared.PromptInputs(sceneSourceInput(), contracts.ReferenceSet{
 		Slots: map[string]contracts.ResolvedReferenceSlot{
 			"roster": {
 				Slot: contracts.ReferenceSlot{Name: "roster"},
@@ -451,8 +451,8 @@ func TestChunkRejectsMalformedStructuredOutput(t *testing.T) {
 			name: "empty metadata field",
 			response: replaceScenes(validSceneResponse(), []sceneResponse{
 				{
-					StartUnitID:        dnd.UnitRefFromInt(1),
-					EndUnitID:          dnd.UnitRefFromInt(4),
+					StartUnitID:        shared.UnitRefFromInt(1),
+					EndUnitID:          shared.UnitRefFromInt(4),
 					ShortTitle:         " ",
 					PrimaryMode:        "Narrative",
 					MainParticipants:   []string{"Aria"},
@@ -467,8 +467,8 @@ func TestChunkRejectsMalformedStructuredOutput(t *testing.T) {
 			name: "empty participant",
 			response: replaceScenes(validSceneResponse(), []sceneResponse{
 				{
-					StartUnitID:        dnd.UnitRefFromInt(1),
-					EndUnitID:          dnd.UnitRefFromInt(4),
+					StartUnitID:        shared.UnitRefFromInt(1),
+					EndUnitID:          shared.UnitRefFromInt(4),
 					ShortTitle:         "Title",
 					PrimaryMode:        "Narrative",
 					MainParticipants:   []string{"Aria", " "},
@@ -559,8 +559,8 @@ func replaceScenes(response chunkResponse, scenes []sceneResponse) chunkResponse
 
 func scene(startUnitID int, endUnitID int) sceneResponse {
 	return sceneResponse{
-		StartUnitID:        dnd.UnitRefFromInt(startUnitID),
-		EndUnitID:          dnd.UnitRefFromInt(endUnitID),
+		StartUnitID:        shared.UnitRefFromInt(startUnitID),
+		EndUnitID:          shared.UnitRefFromInt(endUnitID),
 		ShortTitle:         "Scene title",
 		PrimaryMode:        "Narrative",
 		MainParticipants:   []string{"Aria"},

internal/modules/dnd/chunk/scenes/model.go

@@ -0,0 +1,30 @@
+package scenes
+
+import "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
+
+type chunkResponse struct {
+	Scenes          []sceneResponse `json:"scenes"`
+	BoundaryCaveats []string        `json:"boundary_caveats"`
+}
+
+type sceneResponse struct {
+	StartUnitID        shared.UnitRef `json:"start_unit_id"`
+	EndUnitID          shared.UnitRef `json:"end_unit_id"`
+	ShortTitle         string         `json:"short_title"`
+	PrimaryMode        string         `json:"primary_mode"`
+	MainParticipants   []string       `json:"main_participants"`
+	Summary            string         `json:"summary"`
+	BoundaryNote       string         `json:"boundary_note"`
+	BoundaryConfidence string         `json:"boundary_confidence"`
+}
+
+type normalizedScene struct {
+	StartUnitID        int
+	EndUnitID          int
+	ShortTitle         string
+	PrimaryMode        string
+	MainParticipants   []string
+	Summary            string
+	BoundaryNote       string
+	BoundaryConfidence string
+}

internal/modules/dnd/chunk/scenes/scriptorium_assets.go

@@ -5,14 +5,14 @@ import (
 	"sync"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets/dnd"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/promptfs"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
 )
 
 const scriptoriumPromptRoot = "assets/prompts"
 
 func RegisterPromptAssets(registry *llm.AssetRegistry) error {
-	promptFS, err := dnd.ModulePromptFS("dnd.scenes", embeddedAssets, []sharedassets.ModulePromptFile{
+	promptFS, err := shared.ModulePromptFS("dnd.scenes", embeddedAssets, []promptfs.ModulePromptFile{
 		{Name: "dnd.scenes.yaml", Path: "assets/prompts/dnd.scenes.yaml"},
 		{Name: "task.md", Path: "assets/prompts/task.md"},
 		{Name: "instructions.md", Path: "assets/prompts/instructions.md"},
@@ -32,7 +32,7 @@ func scriptoriumPromptMetadata() (string, error) {
 			{FS: embeddedAssets, Path: "assets/prompts/dnd.scenes.yaml"},
 			{FS: embeddedAssets, Path: "assets/prompts/task.md"},
 			{FS: embeddedAssets, Path: "assets/prompts/instructions.md"},
-		}, append(dnd.CommonHashParts(), dnd.ReferenceHashParts()...)...)
+		}, append(shared.CommonHashParts(), shared.ReferenceHashParts()...)...)
 		scriptoriumPromptHash, scriptoriumPromptHashErr = llm.HashAssets(parts)
 	})
 	return scriptoriumPromptHash, scriptoriumPromptHashErr

internal/modules/dnd/extract/spells/canonicalize.go

@@ -3,7 +3,7 @@ package spells
 import (
 	"sort"
 
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets/dnd"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
 )
 
 func canonicalizeResponse(response *extractionResponse, sourceID string) {
@@ -43,20 +43,20 @@ func canonicalizeSpellCast(spell *spellCastResponse, sourceID string) {
 	spell.SourceRefs = dedupeSourceRefs(spell.SourceRefs)
 }
 
-func canonicalUnitRef(ref dnd.UnitRef) dnd.UnitRef {
+func canonicalUnitRef(ref shared.UnitRef) shared.UnitRef {
 	value := ref.Int()
 	if value <= 0 {
 		return ref
 	}
-	return dnd.UnitRefFromInt(value)
+	return shared.UnitRefFromInt(value)
 }
 
-func dedupeSourceRefs(refs []dnd.SourceRefResponse) []dnd.SourceRefResponse {
+func dedupeSourceRefs(refs []shared.SourceRefResponse) []shared.SourceRefResponse {
 	if len(refs) < 2 {
 		return refs
 	}
 	out := refs[:0]
-	var previous dnd.SourceRefResponse
+	var previous shared.SourceRefResponse
 	for index, ref := range refs {
 		if index > 0 && sameSourceRef(previous, ref) {
 			continue
@@ -67,7 +67,7 @@ func dedupeSourceRefs(refs []dnd.SourceRefResponse) []dnd.SourceRefResponse {
 	return out
 }
 
-func sameSourceRef(left dnd.SourceRefResponse, right dnd.SourceRefResponse) bool {
+func sameSourceRef(left shared.SourceRefResponse, right shared.SourceRefResponse) bool {
 	return left.SourceID == right.SourceID &&
 		left.StartUnitID.Int() == right.StartUnitID.Int() &&
 		left.EndUnitID.Int() == right.EndUnitID.Int()
@@ -83,7 +83,7 @@ func earliestSourceUnit(spell spellCastResponse) (int, bool) {
 	return 0, false
 }
 
-func unitSortValue(ref dnd.UnitRef) int {
+func unitSortValue(ref shared.UnitRef) int {
 	value := ref.Int()
 	if value <= 0 {
 		return int(^uint(0) >> 1)

internal/modules/dnd/extract/spells/extractor.go

@@ -8,7 +8,7 @@ import (
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets/dnd"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
 )
 
 const Key = "dnd/spells"
@@ -24,7 +24,7 @@ var providedCapabilities = []string{
 	"dnd.spell_casts",
 }
 
-var referenceSlotDescriptions = dnd.ReferenceSlotDescriptions{
+var referenceSlotDescriptions = shared.ReferenceSlotDescriptions{
 	Glossary: "Optional campaign glossary reference material used only for disambiguation.",
 	Party:    "Optional party roster reference material used only for disambiguation.",
 	Players:  "Optional player list reference material used only for disambiguation.",
@@ -44,7 +44,7 @@ func (e *Extractor) Key() string {
 }
 
 func (e *Extractor) ReferenceSlots() []contracts.ReferenceSlot {
-	return dnd.ReferenceSlots(referenceSlotDescriptions)
+	return shared.ReferenceSlots(referenceSlotDescriptions)
 }
 
 func (e *Extractor) ManifestMetadata() map[string]any {
@@ -101,7 +101,7 @@ func (e *Extractor) Extract(ctx context.Context, req contracts.ExtractionRequest
 		PromptVersion: SchemaVersion,
 		ProfileID:     req.LLMProfile,
 		SessionID:     req.SessionID,
-		Inputs:        dnd.PromptInputs(sourceInput, req.References),
+		Inputs:        shared.PromptInputs(sourceInput, req.References),
 	}, &response); err != nil {
 		return contracts.ExtractionResult{}, extractorErrorf("complete structured output: %w", err)
 	}
@@ -159,7 +159,7 @@ func ModuleSpec() pipeline.ModuleSpec {
 		Stage:          pipeline.StageExtract,
 		Requires:       append([]string(nil), requiredCapabilities...),
 		Provides:       append([]string(nil), providedCapabilities...),
-		ReferenceSlots: dnd.ReferenceSlots(referenceSlotDescriptions),
+		ReferenceSlots: shared.ReferenceSlots(referenceSlotDescriptions),
 	}
 }
 

internal/modules/dnd/extract/spells/extractor_test.go

@@ -8,7 +8,7 @@ import (
 	"testing"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets/dnd"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
 )
 
 func TestExtractReturnsCanonicalOutputFromStructuredResponse(t *testing.T) {
@@ -155,7 +155,7 @@ func TestExtractPassesReferencesAsPromptInputs(t *testing.T) {
 }
 
 func TestPromptInputsMapLegacyRosterReferenceToParty(t *testing.T) {
-	inputs := dnd.PromptInputs(spellSourceInput(), contracts.ReferenceSet{
+	inputs := shared.PromptInputs(spellSourceInput(), contracts.ReferenceSet{
 		Slots: map[string]contracts.ResolvedReferenceSlot{
 			"roster": {
 				Slot: contracts.ReferenceSlot{Name: "roster"},
@@ -303,10 +303,10 @@ func TestExtractCanonicalizesSourceRefs(t *testing.T) {
 					Spell:                "Cure Wounds",
 					Effect:               "Heals.",
 					NarrativeDescription: "Aria heals.",
-					SourceRefs: []dnd.SourceRefResponse{
-						{SourceID: "gameplay_transcript", StartUnitID: dnd.UnitRefFromInt(2), EndUnitID: dnd.UnitRefFromInt(2)},
-						{SourceID: "", StartUnitID: dnd.UnitRefFromInt(1), EndUnitID: dnd.UnitRefFromInt(2)},
-						{SourceID: "transcript", StartUnitID: dnd.UnitRefFromInt(1), EndUnitID: dnd.UnitRefFromInt(2)},
+					SourceRefs: []shared.SourceRefResponse{
+						{SourceID: "gameplay_transcript", StartUnitID: shared.UnitRefFromInt(2), EndUnitID: shared.UnitRefFromInt(2)},
+						{SourceID: "", StartUnitID: shared.UnitRefFromInt(1), EndUnitID: shared.UnitRefFromInt(2)},
+						{SourceID: "transcript", StartUnitID: shared.UnitRefFromInt(1), EndUnitID: shared.UnitRefFromInt(2)},
 					},
 				},
 			},
@@ -345,8 +345,8 @@ func TestExtractPreservesInvalidSourceRefsForValidators(t *testing.T) {
 					Spell:                "Cure Wounds",
 					Effect:               "Heals.",
 					NarrativeDescription: "Aria heals.",
-					SourceRefs: []dnd.SourceRefResponse{
-						{SourceID: "transcript", StartUnitID: dnd.UnitRefFromInt(99), EndUnitID: dnd.UnitRefFromString("missing")},
+					SourceRefs: []shared.SourceRefResponse{
+						{SourceID: "transcript", StartUnitID: shared.UnitRefFromInt(99), EndUnitID: shared.UnitRefFromString("missing")},
 					},
 				},
 			},
@@ -386,7 +386,7 @@ func TestExtractDefensivelyCopiesRawContent(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Extract() error = %v, want nil", err)
 	}
-	client.response.SpellCasts[0].SourceRefs[0].StartUnitID = dnd.UnitRefFromInt(99)
+	client.response.SpellCasts[0].SourceRefs[0].StartUnitID = shared.UnitRefFromInt(99)
 
 	var payload extractionResponse
 	if err := json.Unmarshal(result.Output.Payload.Content, &payload); err != nil {

internal/modules/dnd/extract/spells/model.go

@@ -0,0 +1,22 @@
+package spells
+
+import "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
+
+type SpellCast struct {
+	Caster               string `json:"caster"`
+	Spell                string `json:"spell"`
+	Effect               string `json:"effect"`
+	NarrativeDescription string `json:"narrative_description"`
+}
+
+type extractionResponse struct {
+	SpellCasts []spellCastResponse `json:"spell_casts"`
+}
+
+type spellCastResponse struct {
+	Caster               string                     `json:"caster"`
+	Spell                string                     `json:"spell"`
+	Effect               string                     `json:"effect"`
+	NarrativeDescription string                     `json:"narrative_description"`
+	SourceRefs           []shared.SourceRefResponse `json:"source_refs"`
+}

internal/modules/dnd/extract/spells/scriptorium_assets.go

@@ -5,14 +5,14 @@ import (
 	"sync"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets/dnd"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/promptfs"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
 )
 
 const scriptoriumPromptRoot = "assets/prompts"
 
 func RegisterPromptAssets(registry *llm.AssetRegistry) error {
-	promptFS, err := dnd.ModulePromptFS("dnd.spells", embeddedAssets, []sharedassets.ModulePromptFile{
+	promptFS, err := shared.ModulePromptFS("dnd.spells", embeddedAssets, []promptfs.ModulePromptFile{
 		{Name: "dnd.spells.yaml", Path: "assets/prompts/dnd.spells.yaml"},
 		{Name: "task.md", Path: "assets/prompts/task.md"},
 		{Name: "instructions.md", Path: "assets/prompts/instructions.md"},
@@ -32,7 +32,7 @@ func scriptoriumPromptMetadata() (string, error) {
 			{FS: embeddedAssets, Path: "assets/prompts/dnd.spells.yaml"},
 			{FS: embeddedAssets, Path: "assets/prompts/task.md"},
 			{FS: embeddedAssets, Path: "assets/prompts/instructions.md"},
-		}, append(dnd.CommonHashParts(), dnd.ReferenceHashParts()...)...)
+		}, append(shared.CommonHashParts(), shared.ReferenceHashParts()...)...)
 		scriptoriumPromptHash, scriptoriumPromptHashErr = llm.HashAssets(parts)
 	})
 	return scriptoriumPromptHash, scriptoriumPromptHashErr

internal/modules/dnd/extract/spells/test_helpers_test.go

@@ -6,7 +6,7 @@ import (
 
 	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets/dnd"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
 )
 
 func promptExtractionRequest() contracts.ExtractionRequest {
@@ -65,22 +65,22 @@ func mustJSON(t *testing.T, value any) string {
 	return string(encoded)
 }
 
-func responseSourceRefs(sourceID string, startUnitID int, endUnitID int) []dnd.SourceRefResponse {
-	return []dnd.SourceRefResponse{
+func responseSourceRefs(sourceID string, startUnitID int, endUnitID int) []shared.SourceRefResponse {
+	return []shared.SourceRefResponse{
 		{
 			SourceID:    sourceID,
-			StartUnitID: dnd.UnitRefFromInt(startUnitID),
-			EndUnitID:   dnd.UnitRefFromInt(endUnitID),
+			StartUnitID: shared.UnitRefFromInt(startUnitID),
+			EndUnitID:   shared.UnitRefFromInt(endUnitID),
 		},
 	}
 }
 
-func responseSourceRefsInt(sourceID string, startUnitID int, endUnitID int) []dnd.SourceRefResponse {
-	return []dnd.SourceRefResponse{
+func responseSourceRefsInt(sourceID string, startUnitID int, endUnitID int) []shared.SourceRefResponse {
+	return []shared.SourceRefResponse{
 		{
 			SourceID:    sourceID,
-			StartUnitID: dnd.UnitRefFromInt(startUnitID),
-			EndUnitID:   dnd.UnitRefFromInt(endUnitID),
+			StartUnitID: shared.UnitRefFromInt(startUnitID),
+			EndUnitID:   shared.UnitRefFromInt(endUnitID),
 		},
 	}
 }

internal/modules/dnd/register/register.go

@@ -6,13 +6,13 @@ import (
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/chunk/dnd/scenes"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/extract/dnd/spells"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/chunk/scenes"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/spells"
+	spellshape "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/shape"
+	spellsourcerefs "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/source_refs"
+	spellrelatedness "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/source_relatedness"
 	validjson "gitea.maximumdirect.net/eric/notarius/internal/modules/generic/validate/valid_json"
 	validjsonschema "gitea.maximumdirect.net/eric/notarius/internal/modules/generic/validate/valid_json_schema"
-	spellshape "gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/shape"
-	spellsourcerefs "gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/source_refs"
-	spellrelatedness "gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/source_relatedness"
 )
 
 // Register adds all production D&D modules, validators, policy, and assets.

internal/modules/dnd/register/register_test.go

@@ -9,7 +9,7 @@ import (
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/extract/dnd/spells"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/spells"
 )
 
 func TestRegisterAddsDNDFamily(t *testing.T) {

internal/modules/dnd/shared/assets.go

@@ -1,11 +1,11 @@
-package dnd
+package shared
 
 import (
 	"embed"
 	"io/fs"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/promptfs"
 )
 
 //go:embed assets/prompts/*.md
@@ -17,10 +17,10 @@ var sharedPromptFiles = []string{
 	"common-dnd-references.md",
 }
 
-func SharedPromptFiles() []sharedassets.SharedPromptFile {
-	files := make([]sharedassets.SharedPromptFile, 0, len(sharedPromptFiles))
+func SharedPromptFiles() []promptfs.SharedPromptFile {
+	files := make([]promptfs.SharedPromptFile, 0, len(sharedPromptFiles))
 	for _, name := range sharedPromptFiles {
-		files = append(files, sharedassets.SharedPromptFile{
+		files = append(files, promptfs.SharedPromptFile{
 			Name: name,
 			FS:   embeddedAssets,
 			Path: "assets/prompts/" + name,
@@ -42,6 +42,6 @@ func ReferenceHashParts() []llm.AssetHashPart {
 	}
 }
 
-func ModulePromptFS(moduleDir string, moduleFS fs.FS, files []sharedassets.ModulePromptFile) (fs.FS, error) {
-	return sharedassets.ModulePromptFS(moduleDir, moduleFS, files, SharedPromptFiles()...)
+func ModulePromptFS(moduleDir string, moduleFS fs.FS, files []promptfs.ModulePromptFile) (fs.FS, error) {
+	return promptfs.ModulePromptFS(moduleDir, moduleFS, files, SharedPromptFiles()...)
 }

internal/modules/dnd/shared/assets_test.go

@@ -1,4 +1,4 @@
-package dnd
+package shared
 
 import (
 	"io/fs"
@@ -6,7 +6,7 @@ import (
 	"testing/fstest"
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/llm"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/promptfs"
 )
 
 func TestSharedPromptFilesReturnsNewSlice(t *testing.T) {
@@ -67,7 +67,7 @@ func assertHashParts(t *testing.T, name string, parts []llm.AssetHashPart, want
 func TestModulePromptFSMountsDNDSharedPrompts(t *testing.T) {
 	fsys, err := ModulePromptFS("dnd.test", fstest.MapFS{
 		"assets/prompts/dnd.test.yaml": {Data: []byte("id: dnd.test")},
-	}, []sharedassets.ModulePromptFile{
+	}, []promptfs.ModulePromptFile{
 		{Name: "dnd.test.yaml", Path: "assets/prompts/dnd.test.yaml"},
 	})
 	if err != nil {

internal/modules/dnd/shared/prompt_inputs.go

@@ -1,4 +1,4 @@
-package dnd
+package shared
 
 import (
 	"bytes"

internal/modules/dnd/shared/prompt_inputs_test.go

@@ -1,4 +1,4 @@
-package dnd
+package shared
 
 import (
 	"strings"

internal/modules/dnd/shared/references.go

@@ -1,4 +1,4 @@
-package dnd
+package shared
 
 import "gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 

internal/modules/dnd/shared/references_test.go

@@ -1,4 +1,4 @@
-package dnd
+package shared
 
 import (
 	"reflect"

internal/modules/dnd/shared/unit_refs.go

@@ -1,4 +1,4 @@
-package dnd
+package shared
 
 import (
 	"bytes"

internal/modules/dnd/shared/unit_refs_test.go

@@ -1,4 +1,4 @@
-package dnd
+package shared
 
 import (
 	"encoding/json"

internal/modules/dnd/validate/spells/shape/validator.go

@@ -5,7 +5,7 @@ import (
 
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/spellpayload"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/spellpayload"
 )
 
 const Key = "extract/dnd/spells/shape"

internal/modules/dnd/validate/spells/source_refs/validator.go

@@ -7,7 +7,7 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/spellpayload"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/spellpayload"
 )
 
 const Key = "extract/dnd/spells/source_refs"

internal/modules/dnd/validate/spells/source_relatedness/validator.go

@@ -8,7 +8,7 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
-	"gitea.maximumdirect.net/eric/notarius/internal/validators/extract/dnd/spells/spellpayload"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/spells/spellpayload"
 )
 
 const Key = "extract/dnd/spells/source_relatedness"

internal/modules/dnd/validate/spells/spellpayload/payload.go

@@ -9,7 +9,7 @@ import (
 
 	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
-	"gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets/dnd"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
 )
 
 type Payload struct {
@@ -17,11 +17,11 @@ type Payload struct {
 }
 
 type SpellCast struct {
-	Caster               string                  `json:"caster"`
-	Spell                string                  `json:"spell"`
-	Effect               string                  `json:"effect"`
-	NarrativeDescription string                  `json:"narrative_description"`
-	SourceRefs           []dnd.SourceRefResponse `json:"source_refs"`
+	Caster               string                     `json:"caster"`
+	Spell                string                     `json:"spell"`
+	Effect               string                     `json:"effect"`
+	NarrativeDescription string                     `json:"narrative_description"`
+	SourceRefs           []shared.SourceRefResponse `json:"source_refs"`
 }
 
 func Parse(raw []byte) (Payload, error) {
@@ -66,7 +66,7 @@ func ValidateShape(payload Payload) error {
 func SourceRefCandidates(doc *source.SourceDocument, spell SpellCast) []source.SourceRef {
 	refs := make([]source.SourceRef, 0, len(spell.SourceRefs))
 	for _, ref := range spell.SourceRefs {
-		refs = append(refs, dnd.SourceRefCandidate(doc, ref))
+		refs = append(refs, shared.SourceRefCandidate(doc, ref))
 	}
 	return refs
 }

internal/modules/extract/dnd/spells/model.go

@@ -1,22 +0,0 @@
-package spells
-
-import "gitea.maximumdirect.net/eric/notarius/internal/modules/sharedassets/dnd"
-
-type SpellCast struct {
-	Caster               string `json:"caster"`
-	Spell                string `json:"spell"`
-	Effect               string `json:"effect"`
-	NarrativeDescription string `json:"narrative_description"`
-}
-
-type extractionResponse struct {
-	SpellCasts []spellCastResponse `json:"spell_casts"`
-}
-
-type spellCastResponse struct {
-	Caster               string                  `json:"caster"`
-	Spell                string                  `json:"spell"`
-	Effect               string                  `json:"effect"`
-	NarrativeDescription string                  `json:"narrative_description"`
-	SourceRefs           []dnd.SourceRefResponse `json:"source_refs"`
-}

internal/modules/generic/testdata/importboundaries/imports_dnd.go

@@ -0,0 +1,3 @@
+package importboundaries
+
+import _ "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"

internal/modules/import_boundaries_test.go

@@ -0,0 +1,203 @@
+package modules_test
+
+import (
+	"fmt"
+	"go/parser"
+	"go/token"
+	"io/fs"
+	"path/filepath"
+	"runtime"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+const moduleImportPrefix = "gitea.maximumdirect.net/eric/notarius/internal/modules/"
+
+func TestProductionImportBoundaries(t *testing.T) {
+	repositoryRoot := testRepositoryRoot(t)
+	err := filepath.WalkDir(repositoryRoot, func(path string, entry fs.DirEntry, walkErr error) error {
+		if walkErr != nil {
+			return walkErr
+		}
+		if entry.IsDir() {
+			if entry.Name() == ".git" || entry.Name() == "testdata" || entry.Name() == "vendor" {
+				return filepath.SkipDir
+			}
+			return nil
+		}
+		if filepath.Ext(path) != ".go" {
+			return nil
+		}
+		return checkImportBoundaries(repositoryRoot, path)
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestImportBoundaryFixtureIsRejected(t *testing.T) {
+	repositoryRoot := testRepositoryRoot(t)
+	fixture := filepath.Join(repositoryRoot, "internal", "modules", "generic", "testdata", "importboundaries", "imports_dnd.go")
+	err := checkImportBoundaries(repositoryRoot, fixture)
+	if err == nil {
+		t.Fatal("fixture import was accepted, want generic-to-D&D violation")
+	}
+	if !strings.Contains(err.Error(), "generic packages must not import D&D packages") {
+		t.Fatalf("fixture error = %q, want generic-to-D&D violation", err)
+	}
+}
+
+func TestImportBoundaryRules(t *testing.T) {
+	tests := []struct {
+		name       string
+		filename   string
+		importPath string
+		wantError  bool
+	}{
+		{
+			name:       "D&D implementation cannot import Seriatim",
+			filename:   "internal/modules/dnd/extract/example/extractor.go",
+			importPath: moduleImportPrefix + "seriatim/input/transcript",
+			wantError:  true,
+		},
+		{
+			name:       "Seriatim implementation cannot import D&D",
+			filename:   "internal/modules/seriatim/input/example/adapter.go",
+			importPath: moduleImportPrefix + "dnd/shared",
+			wantError:  true,
+		},
+		{
+			name:       "generic implementation cannot import D&D",
+			filename:   "internal/modules/generic/merge/example/merger.go",
+			importPath: moduleImportPrefix + "dnd/shared",
+			wantError:  true,
+		},
+		{
+			name:       "domain root cannot import child",
+			filename:   "internal/modules/dnd/types.go",
+			importPath: moduleImportPrefix + "dnd/extract/spells",
+			wantError:  true,
+		},
+		{
+			name:       "D&D implementation may import generic implementation",
+			filename:   "internal/modules/dnd/extract/example/extractor.go",
+			importPath: moduleImportPrefix + "generic/normalize/noop",
+		},
+		{
+			name:       "domain registrar may compose child packages",
+			filename:   "internal/modules/dnd/register/register.go",
+			importPath: moduleImportPrefix + "dnd/extract/spells",
+		},
+		{
+			name:       "CLI may compose registrars",
+			filename:   "internal/cli/catalog.go",
+			importPath: moduleImportPrefix + "dnd/register",
+		},
+		{
+			name:       "external integration test may compose domains",
+			filename:   "internal/modules/integration/example_test.go",
+			importPath: moduleImportPrefix + "dnd/extract/spells",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := validateImport(tt.filename, tt.importPath)
+			if tt.wantError && err == nil {
+				t.Fatal("validateImport() error = nil, want boundary violation")
+			}
+			if !tt.wantError && err != nil {
+				t.Fatalf("validateImport() error = %v, want nil", err)
+			}
+		})
+	}
+}
+
+func checkImportBoundaries(repositoryRoot string, filename string) error {
+	parsed, err := parser.ParseFile(token.NewFileSet(), filename, nil, parser.ImportsOnly)
+	if err != nil {
+		return fmt.Errorf("parse %s: %w", filename, err)
+	}
+	relative, err := filepath.Rel(repositoryRoot, filename)
+	if err != nil {
+		return fmt.Errorf("resolve relative path for %s: %w", filename, err)
+	}
+	relative = filepath.ToSlash(relative)
+	for _, imported := range parsed.Imports {
+		importPath, err := strconv.Unquote(imported.Path.Value)
+		if err != nil {
+			return fmt.Errorf("parse import in %s: %w", relative, err)
+		}
+		if err := validateImport(relative, importPath); err != nil {
+			return fmt.Errorf("%s imports %s: %w", relative, importPath, err)
+		}
+	}
+	return nil
+}
+
+func validateImport(filename string, importPath string) error {
+	if isExternalIntegrationTest(filename) {
+		return nil
+	}
+	sourceDomain, sourceRoot := domainForFile(filename)
+	targetDomain, targetChild := domainForImport(importPath)
+	if sourceDomain == "" || targetDomain == "" {
+		return nil
+	}
+	if sourceRoot && sourceDomain == targetDomain && targetChild {
+		return fmt.Errorf("domain root packages must not import child implementations")
+	}
+	if sourceDomain == "generic" && targetDomain == "dnd" {
+		return fmt.Errorf("generic packages must not import D&D packages")
+	}
+	if sourceDomain == "dnd" && targetDomain == "seriatim" {
+		return fmt.Errorf("D&D packages must not import Seriatim packages")
+	}
+	if sourceDomain == "seriatim" && targetDomain == "dnd" {
+		return fmt.Errorf("Seriatim packages must not import D&D packages")
+	}
+	return nil
+}
+
+func domainForFile(filename string) (domain string, root bool) {
+	const prefix = "internal/modules/"
+	if !strings.HasPrefix(filename, prefix) {
+		return "", false
+	}
+	remainder := strings.TrimPrefix(filename, prefix)
+	parts := strings.Split(remainder, "/")
+	if len(parts) < 2 || !isDomain(parts[0]) {
+		return "", false
+	}
+	return parts[0], len(parts) == 2
+}
+
+func domainForImport(importPath string) (domain string, child bool) {
+	if !strings.HasPrefix(importPath, moduleImportPrefix) {
+		return "", false
+	}
+	remainder := strings.TrimPrefix(importPath, moduleImportPrefix)
+	parts := strings.Split(remainder, "/")
+	if len(parts) == 0 || !isDomain(parts[0]) {
+		return "", false
+	}
+	return parts[0], len(parts) > 1
+}
+
+func isDomain(name string) bool {
+	return name == "dnd" || name == "generic" || name == "seriatim"
+}
+
+func isExternalIntegrationTest(filename string) bool {
+	return strings.HasPrefix(filename, "internal/modules/integration/") && strings.HasSuffix(filename, "_test.go")
+}
+
+func testRepositoryRoot(t *testing.T) string {
+	t.Helper()
+	_, filename, _, ok := runtime.Caller(0)
+	if !ok {
+		t.Fatal("resolve import-boundary test location")
+	}
+	return filepath.Clean(filepath.Join(filepath.Dir(filename), "..", ".."))
+}

internal/modules/integration/dnd_spells_config_test.go

@@ -1,4 +1,4 @@
-package spells
+package integration_test
 
 import (
 	"context"
@@ -10,6 +10,7 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/spells"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/generic/merge/appendorder"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/generic/normalize/noop"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/seriatim/input/transcript"
@@ -45,8 +46,8 @@ func TestPipelineConfigLoadsAndResolvesWithDNDSpellsExtractor(t *testing.T) {
 	if lane.ID != "spells" {
 		t.Fatalf("lane ID = %q, want spells", lane.ID)
 	}
-	if lane.Extract.Module != Key {
-		t.Fatalf("extract module = %q, want %q", lane.Extract.Module, Key)
+	if lane.Extract.Module != spells.Key {
+		t.Fatalf("extract module = %q, want %q", lane.Extract.Module, spells.Key)
 	}
 	if resolved.ResolvedPipeline.Digest == "" {
 		t.Fatal("resolved digest is empty")
@@ -82,13 +83,13 @@ func TestPipelineConfigRejectsMissingTranscriptCapabilityForDNDSpells(t *testing
 	}
 	if !strings.Contains(err.Error(), "missing capability") ||
 		!strings.Contains(err.Error(), "source.transcript") ||
-		!strings.Contains(err.Error(), Key) {
+		!strings.Contains(err.Error(), spells.Key) {
 		t.Fatalf("Resolve() error = %q, want dnd/spells missing source.transcript capability", err.Error())
 	}
 }
 
 func TestPipelineConfigRejectsMissingSpellCastsCapabilityForAppendOrder(t *testing.T) {
-	extractorSpec := ModuleSpec()
+	extractorSpec := spells.ModuleSpec()
 	extractorSpec.Provides = withoutCapability(extractorSpec.Provides, "dnd.spell_casts")
 
 	_, err := loadDNDSpellsPipelineConfig(t).Resolve(config.ResolveInput{
@@ -176,11 +177,11 @@ func dndSpellsTestCatalog(t *testing.T, specs dndSpellsCatalogSpecs) pipeline.Mo
 	}
 
 	if specs.extractor.Key == "" {
-		if err := Register(extractors); err != nil {
+		if err := spells.Register(extractors); err != nil {
 			t.Fatalf("register dnd spells extractor: %v", err)
 		}
 	} else if err := extractors.RegisterWithSpec(specs.extractor, func() (contracts.Extractor, error) {
-		return New(), nil
+		return spells.New(), nil
 	}); err != nil {
 		t.Fatalf("register dnd spells extractor override: %v", err)
 	}

internal/modules/integration/dnd_spells_helpers_test.go

@@ -0,0 +1,63 @@
+package integration_test
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
+)
+
+type extractionResponse struct {
+	SpellCasts []spellCastResponse `json:"spell_casts"`
+}
+
+type spellCastResponse struct {
+	Caster               string                     `json:"caster"`
+	Spell                string                     `json:"spell"`
+	Effect               string                     `json:"effect"`
+	NarrativeDescription string                     `json:"narrative_description"`
+	SourceRefs           []shared.SourceRefResponse `json:"source_refs"`
+}
+
+type fakeSpellsLLMClient struct {
+	response extractionResponse
+	requests []contracts.StructuredCompletionRequest
+}
+
+func (client *fakeSpellsLLMClient) CompleteStructured(_ context.Context, req contracts.StructuredCompletionRequest, out any) (contracts.StructuredCompletionResponse, error) {
+	client.requests = append(client.requests, cloneStructuredCompletionRequest(req))
+	content, err := json.Marshal(client.response)
+	if err != nil {
+		return contracts.StructuredCompletionResponse{}, err
+	}
+	if err := json.Unmarshal(content, out); err != nil {
+		return contracts.StructuredCompletionResponse{}, fmt.Errorf("populate structured target: %w", err)
+	}
+	return contracts.StructuredCompletionResponse{Content: content}, nil
+}
+
+func responseSourceRefs(sourceID string, startUnitID int, endUnitID int) []shared.SourceRefResponse {
+	return []shared.SourceRefResponse{
+		{
+			SourceID:    sourceID,
+			StartUnitID: shared.UnitRefFromInt(startUnitID),
+			EndUnitID:   shared.UnitRefFromInt(endUnitID),
+		},
+	}
+}
+
+func cloneStructuredCompletionRequest(req contracts.StructuredCompletionRequest) contracts.StructuredCompletionRequest {
+	req.Inputs = req.Inputs.Clone()
+	if len(req.Vars) == 0 {
+		req.Vars = nil
+		return req
+	}
+	vars := make(map[string]any, len(req.Vars))
+	for key, value := range req.Vars {
+		vars[key] = value
+	}
+	req.Vars = vars
+	return req
+}

internal/modules/integration/dnd_spells_runner_test.go

@@ -1,4 +1,4 @@
-package spells
+package integration_test
 
 import (
 	"context"
@@ -11,6 +11,7 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/spells"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/seriatim/input/transcript"
 )
 
@@ -52,7 +53,7 @@ func TestRunnerProcessesSeriatimInputWithDNDSpellsExtractor(t *testing.T) {
 		t.Fatalf("len(NormalizeOutputs) = %d, want 1", len(output.NormalizeOutputs))
 	}
 	rawOutput := output.NormalizeOutputs[0]
-	if rawOutput.LaneID != "spells" || rawOutput.Schema.ID != ResponseSchemaID || rawOutput.Schema.Version != SchemaVersion {
+	if rawOutput.LaneID != "spells" || rawOutput.Schema.ID != spells.ResponseSchemaID || rawOutput.Schema.Version != spells.SchemaVersion {
 		t.Fatalf("raw output envelope = %#v, want dnd spells schema on spells lane", rawOutput)
 	}
 	response := decodeRunnerSpellResponse(t, rawOutput.Payload.Content)
@@ -85,16 +86,16 @@ func TestRunnerProcessesSeriatimInputWithDNDSpellsExtractor(t *testing.T) {
 		t.Fatalf("len(ArtifactLanes) = %d, want 1", len(output.Manifest.ArtifactLanes))
 	}
 	lane := output.Manifest.ArtifactLanes[0]
-	if lane.ID != "spells" || lane.Extractor != Key {
+	if lane.ID != "spells" || lane.Extractor != spells.Key {
 		t.Fatalf("manifest lane = %#v, want spells lane with dnd/spells extractor", lane)
 	}
 	extractorMetadata, ok := lane.Metadata["extractor"].(map[string]any)
 	if !ok {
 		t.Fatalf("manifest lane metadata = %#v, want extractor metadata", lane.Metadata)
 	}
-	if extractorMetadata["prompt_id"] != PromptID ||
-		extractorMetadata["response_schema_key"] != string(ResponseSchemaKey) ||
-		extractorMetadata["response_schema_name"] != ResponseSchemaName {
+	if extractorMetadata["prompt_id"] != spells.PromptID ||
+		extractorMetadata["response_schema_key"] != string(spells.ResponseSchemaKey) ||
+		extractorMetadata["response_schema_name"] != spells.ResponseSchemaName {
 		t.Fatalf("extractor metadata = %#v, want prompt/schema identifiers", extractorMetadata)
 	}
 	if len(output.OutputFiles) != 1 {
@@ -146,8 +147,8 @@ func TestRunnerPassesPartyAndGlossaryReferencesToDNDSpellsPrompt(t *testing.T) {
 		t.Fatalf("LLM calls = %d, want 1", len(llmClient.requests))
 	}
 	request := llmClient.requests[0]
-	if request.PromptID != PromptID || request.PromptVersion != SchemaVersion {
-		t.Fatalf("prompt = %q/%q, want %q/%q", request.PromptID, request.PromptVersion, PromptID, SchemaVersion)
+	if request.PromptID != spells.PromptID || request.PromptVersion != spells.SchemaVersion {
+		t.Fatalf("prompt = %q/%q, want %q/%q", request.PromptID, request.PromptVersion, spells.PromptID, spells.SchemaVersion)
 	}
 	if got := string(request.Inputs["party"].Content); got != "Aria: party cleric\nBorin: fighter" {
 		t.Fatalf("party input = %q, want reference text", got)
@@ -188,8 +189,8 @@ func TestRunnerDoesNotExtractSpellMentionedOnlyInPartyReference(t *testing.T) {
 		t.Fatalf("LLM calls = %d, want 1", len(llmClient.requests))
 	}
 	request := llmClient.requests[0]
-	if request.PromptID != PromptID || request.PromptVersion != SchemaVersion {
-		t.Fatalf("prompt = %q/%q, want %q/%q", request.PromptID, request.PromptVersion, PromptID, SchemaVersion)
+	if request.PromptID != spells.PromptID || request.PromptVersion != spells.SchemaVersion {
+		t.Fatalf("prompt = %q/%q, want %q/%q", request.PromptID, request.PromptVersion, spells.PromptID, spells.SchemaVersion)
 	}
 	if got := string(request.Inputs["party"].Content); !strings.Contains(got, "Lightning Bolt") {
 		t.Fatalf("party input = %q, want party-reference-only spell in reference input", got)