Add D&D location tracking to complete example

examples/dnd-complete.config.yml

@@ -36,6 +36,8 @@ pipelines:
           window_units: 3
           lanes:
             - item-events
+            - locations
+            - location-occurrences
             - npcs
             - spells
             - combat-turns
@@ -59,6 +61,14 @@ pipelines:
             normalize:
               module: dnd/npcs
               retries: 2
+          locations:
+            extract:
+              module: dnd/locations
+              retries: 2
+            merge: appendorder
+            normalize:
+              module: dnd/locations
+              retries: 2
           scene-descriptions:
             extract:
               module: dnd/scene-descriptions
@@ -66,9 +76,13 @@ pipelines:
             merge: appendorder
             normalize: dnd/scene-descriptions
       - id: extract-events
-        # Accepted NPC grounding and scene-description eligibility artifacts are
+        # Accepted registry artifacts and scene-description eligibility artifacts
-        # supplied in memory to their compatible consumers in this step.
+        # are supplied in memory to their compatible consumers in this step.
         references:
+          locations:
+            artifact:
+              step: describe-session
+              lane: locations
           npcs:
             artifact:
               step: describe-session
@@ -102,6 +116,12 @@ pipelines:
               retries: 2
             merge: appendorder
             normalize: dnd/npc-interactions
+          location-occurrences:
+            extract:
+              module: dnd/location-occurrences
+              retries: 2
+            merge: appendorder
+            normalize: dnd/location-occurrences
       - id: track-enemies
         references:
           npcs:

internal/cli/dnd_enemy_events_contract_test.go

@@ -20,14 +20,19 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/chunk/scenes"
+	locationoccurrencecodec "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/codec/locationoccurrences"
+	locationcodec "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/codec/locations"
 	combat "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/combatturns"
 	enemyevents "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/enemyevents"
 	itemevents "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/itemevents"
+	locationoccurrences "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/locationoccurrences"
+	locations "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/locations"
 	npcinteractions "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/npcinteractions"
 	npcs "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/npcs"
 	scenedescriptions "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/scenedescriptions"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/spells"
 	enemyeventnormalize "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/normalize/enemyevents"
+	locationnormalize "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/normalize/locations"
 	npcnormalize "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/normalize/npcs"
 )
 
@@ -117,10 +122,15 @@ func TestMaintainedCompleteExampleProducesEnemyEventsThroughGeneratedHandoffs(t
 	runRoot := filepath.Join(outputRoot, productionRunID)
 	index := readProductionJSON[exampleOutputIndex](t, filepath.Join(runRoot, "index.json"))
 	var enemyOutput exampleOutputIndexEntry
+	var locationOutput, occurrenceOutput exampleOutputIndexEntry
 	for _, entry := range index.OutputFiles {
-		if entry.LaneID == "enemy-events" {
+		switch entry.LaneID {
+		case "enemy-events":
 			enemyOutput = entry
-			break
+		case "locations":
+			locationOutput = entry
+		case "location-occurrences":
+			occurrenceOutput = entry
 		}
 	}
 	if enemyOutput.File != "lanes/enemy-events.json" || enemyOutput.SchemaID != "notarius.dnd.enemy_events" || enemyOutput.SchemaVersion != "v1" {
@@ -130,10 +140,26 @@ func TestMaintainedCompleteExampleProducesEnemyEventsThroughGeneratedHandoffs(t
 	if len(value.Events) != 1 || value.Events[0].Name != "Kesh" || value.Events[0].Kind != dnd.EnemyEventKindFled || len(value.Events[0].SourceRefs) != 1 || value.Events[0].SourceRefs[0].SourceID != "session-ravenfall" || value.Events[0].SourceRefs[0].StartUnitID != 10 {
 		t.Fatalf("enemy event artifact = %#v, want source-linked Kesh fleeing event", value)
 	}
+	if locationOutput.File != "lanes/locations.json" || locationOutput.SchemaID != locationcodec.SchemaID || locationOutput.SchemaVersion != locationcodec.SchemaVersion {
+		t.Fatalf("location output = %#v, want typed location registry JSON", locationOutput)
+	}
+	locationsValue := readProductionJSON[dnd.LocationList](t, filepath.Join(runRoot, locationOutput.File))
+	if len(locationsValue.Locations) != 2 || locationsValue.Locations[0].Name != "Moon Gate" || locationsValue.Locations[1].Name != "Moon Gate" || locationsValue.Locations[0].ID == locationsValue.Locations[1].ID {
+		t.Fatalf("location registry = %#v, want distinct source-grounded identities for same-name locations", locationsValue)
+	}
+	if occurrenceOutput.File != "lanes/location-occurrences.json" || occurrenceOutput.SchemaID != locationoccurrencecodec.SchemaID || occurrenceOutput.SchemaVersion != locationoccurrencecodec.SchemaVersion {
+		t.Fatalf("location occurrence output = %#v, want typed occurrence JSON", occurrenceOutput)
+	}
+	occurrencesValue := readProductionJSON[dnd.LocationOccurrenceList](t, filepath.Join(runRoot, occurrenceOutput.File))
+	if len(occurrencesValue.Occurrences) != 2 || occurrencesValue.Occurrences[0].LocationID == occurrencesValue.Occurrences[1].LocationID || occurrencesValue.Occurrences[0].Name != "Moon Gate" || occurrencesValue.Occurrences[1].Name != "Moon Gate" {
+		t.Fatalf("location occurrences = %#v, want source-grounded references to distinct registry identities", occurrencesValue)
+	}
 
 	evidence := readProductionJSON[evidencecontext.Document](t, filepath.Join(runRoot, "evidence-context.json"))
-	if !containsString(evidence.SelectedLanes, "enemy-events") || !evidenceHasLane(evidence, "enemy-events") {
+	for _, laneID := range []string{"enemy-events", "locations", "location-occurrences"} {
-		t.Fatalf("evidence context = %#v, want direct enemy-event evidence", evidence)
+		if !containsString(evidence.SelectedLanes, laneID) || !evidenceHasLane(evidence, laneID) {
+			t.Fatalf("evidence context = %#v, want direct %s evidence", evidence, laneID)
+		}
 	}
 
 	requests := client.requestsFor(enemyevents.PromptID)
@@ -154,6 +180,16 @@ func TestMaintainedCompleteExampleProducesEnemyEventsThroughGeneratedHandoffs(t
 			t.Fatalf("enemy event %s prompt input = %q, want compact source-free grounding", slot, input.Content)
 		}
 	}
+	locationRequests := client.requestsFor(locationoccurrences.PromptID)
+	if len(locationRequests) != 2 {
+		t.Fatalf("location occurrence requests = %#v, want one request per scene", locationRequests)
+	}
+	for _, request := range locationRequests {
+		registryInput := request.Inputs["locations"]
+		if !strings.Contains(string(registryInput.Content), "Moon Gate") || !strings.Contains(string(registryInput.Content), `"id"`) || strings.Contains(string(registryInput.Content), "source_refs") {
+			t.Fatalf("location occurrence registry input = %q, want source-free ID grounding", registryInput.Content)
+		}
+	}
 }
 
 func completeExampleConfigWithTemporaryCache(t *testing.T) string {
@@ -207,6 +243,14 @@ func (client *enemyEventLLMClient) CompleteStructured(ctx context.Context, reque
 			kind, title = "combat", "Raiders attack"
 		}
 		content = []byte(fmt.Sprintf(`{"kind":%q,"title":%q,"summary":"session scene"}`, kind, title))
+	case locations.PromptID:
+		unitID := 1
+		if combatScene {
+			unitID = 7
+		}
+		content = []byte(fmt.Sprintf(`{"locations":[{"name":"Moon Gate","source_refs":[{"start_unit_id":%d,"end_unit_id":%d}]}]}`, unitID, unitID))
+	case locationnormalize.PromptID:
+		content = []byte(`{"duplicate_groups":[]}`)
 	case spells.PromptID:
 		content = []byte(`{"spell_casts":[]}`)
 	case itemevents.PromptID:
@@ -219,6 +263,27 @@ func (client *enemyEventLLMClient) CompleteStructured(ctx context.Context, reque
 		} else {
 			content = []byte(`{"interactions":[]}`)
 		}
+	case locationoccurrences.PromptID:
+		var registry struct {
+			Locations []struct {
+				ID string `json:"id"`
+			} `json:"locations"`
+		}
+		if err := json.Unmarshal(request.Inputs["locations"].Content, &registry); err != nil {
+			return contracts.StructuredCompletionResponse{}, fmt.Errorf("decode generated location registry: %w", err)
+		}
+		if len(registry.Locations) == 0 {
+			return contracts.StructuredCompletionResponse{}, fmt.Errorf("generated location registry has no locations")
+		}
+		unitID := 1
+		locationID := registry.Locations[0].ID
+		if combatScene {
+			unitID = 7
+			if len(registry.Locations) > 1 {
+				locationID = registry.Locations[1].ID
+			}
+		}
+		content = []byte(fmt.Sprintf(`{"occurrences":[{"location_id":%q,"name":"Moon Gate","kind":"visited","source_refs":[{"start_unit_id":%d,"end_unit_id":%d}]}]}`, locationID, unitID, unitID))
 	case enemyevents.PromptID:
 		content = []byte(`{"events":[{"name":"Kesh","kind":"fled","source_refs":[{"start_unit_id":10,"end_unit_id":10}]}]}`)
 	default:

internal/cli/example_contract_test.go

@@ -15,6 +15,10 @@ import (
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
 	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
+	locationoccurrenceextract "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/locationoccurrences"
+	locationextract "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/locations"
+	locationoccurrencenormalize "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/normalize/locationoccurrences"
+	locationnormalize "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/normalize/locations"
 	spellnormalize "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/normalize/spells"
 	"gitea.maximumdirect.net/eric/notarius/internal/modules/seriatim/input/transcript"
 )
@@ -54,9 +58,23 @@ func TestMaintainedExamplesLoadResolveAndList(t *testing.T) {
 					t.Fatalf("materialize maintained example references for %q: %v", pipelineID, err)
 				}
 				if example.name == "complete" {
-					if got := exampleStepLaneIDs(materialized); strings.Join(got, "|") != "describe-session:item-events,npcs,scene-descriptions|extract-events:combat-turns,npc-interactions,spells|track-enemies:enemy-events" {
+					if got := exampleStepLaneIDs(materialized); strings.Join(got, "|") != "describe-session:item-events,locations,npcs,scene-descriptions|extract-events:combat-turns,location-occurrences,npc-interactions,spells|track-enemies:enemy-events" {
 						t.Fatalf("complete example steps and lanes = %v, want the documented D&D extractor composition", got)
 					}
+					locationLane := referenceContractLane(t, materialized, "locations")
+					if locationLane.ArtifactKind != dnd.LocationListKind || locationLane.Extract.Module != locationextract.Key || locationLane.Extract.Retries != 2 || locationLane.Merge.Module != pipeline.DefaultMergeModule || locationLane.Normalize.Module != locationnormalize.Key || locationLane.Normalize.Retries != 2 {
+						t.Fatalf("location lane = %#v, want typed registry composition", locationLane)
+					}
+					occurrenceLane := referenceContractLane(t, materialized, "location-occurrences")
+					if occurrenceLane.ArtifactKind != dnd.LocationOccurrenceListKind || occurrenceLane.Extract.Module != locationoccurrenceextract.Key || occurrenceLane.Extract.Retries != 2 || occurrenceLane.Merge.Module != pipeline.DefaultMergeModule || occurrenceLane.Normalize.Module != locationoccurrencenormalize.Key {
+						t.Fatalf("location occurrence lane = %#v, want typed occurrence composition", occurrenceLane)
+					}
+					for _, target := range []pipeline.ResolvedReferenceTarget{occurrenceLane.ExtractReferences, occurrenceLane.NormalizeReferences} {
+						binding, found := generatedReferenceBinding(target.Bindings, "locations")
+						if !found || binding.Artifact.Step != "describe-session" || binding.Artifact.Lane != "locations" {
+							t.Fatalf("location occurrence %s reference = %#v, want generated location registry", target.Stage, binding)
+						}
+					}
 					spellLane := referenceContractLane(t, materialized, "spells")
 					if len(spellLane.ExtractReferences.ReferenceSet.Slots["spell_catalog"].Items) != 1 ||
 						len(spellLane.NormalizeReferences.ReferenceSet.Slots["spell_catalog"].Items) != 1 {

internal/modules/integration/dnd_locations_runner_test.go

@@ -0,0 +1,268 @@
+package integration_test
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"strings"
+	"sync"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/config"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/evidencecontext"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
+	locationoccurrencecodec "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/codec/locationoccurrences"
+	locationcodec "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/codec/locations"
+	locationoccurrences "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/locationoccurrences"
+	locations "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/extract/locations"
+	locationnormalize "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/normalize/locations"
+)
+
+func TestLocationRegistryHandoffProducesOccurrencesAndEvidence(t *testing.T) {
+	registries := productionNPCRegistries(t)
+	resolved := resolveLocationPipeline(t, registries)
+	client := &locationHandoffLLMClient{}
+	output, err := runPreparedPipeline(t, registries, resolved, client, pipeline.RunInput{RawInput: readNPCFixture(t)})
+	if err != nil {
+		t.Fatalf("Run() error = %v", err)
+	}
+	if len(output.Rejected) != 0 || len(output.NormalizeOutputs) != 2 {
+		t.Fatalf("run outputs = %#v rejected = %#v, want accepted registry and occurrences", output.NormalizeOutputs, output.Rejected)
+	}
+
+	registryOutput := normalizedLane(t, output, "locations")
+	if registryOutput.Artifact.Kind != dnd.LocationListKind || registryOutput.Artifact.Schema.ID != locationcodec.SchemaID {
+		t.Fatalf("registry envelope = %#v, want durable location artifact", registryOutput)
+	}
+	registry, err := locationcodec.New().Decode(registryOutput.Artifact.Content)
+	if err != nil {
+		t.Fatalf("Decode(registry) error = %v", err)
+	}
+	if len(registry.Locations) != 2 || registry.Locations[0].Name != "Moon Gate" || registry.Locations[1].Name != "Moon Gate" || registry.Locations[0].ID == registry.Locations[1].ID {
+		t.Fatalf("registry = %#v, want same-name locations distinguished by source-derived IDs", registry)
+	}
+
+	occurrenceOutput := normalizedLane(t, output, "occurrences")
+	if occurrenceOutput.Artifact.Kind != dnd.LocationOccurrenceListKind || occurrenceOutput.Artifact.Schema.ID != locationoccurrencecodec.SchemaID {
+		t.Fatalf("occurrence envelope = %#v, want durable occurrence artifact", occurrenceOutput)
+	}
+	occurrences, err := locationoccurrencecodec.New().Decode(occurrenceOutput.Artifact.Content)
+	if err != nil {
+		t.Fatalf("Decode(occurrences) error = %v", err)
+	}
+	if len(occurrences.Occurrences) != 2 || occurrences.Occurrences[0].LocationID == occurrences.Occurrences[1].LocationID || occurrences.Occurrences[0].LocationID != registry.Locations[0].ID || occurrences.Occurrences[1].LocationID != registry.Locations[1].ID {
+		t.Fatalf("occurrences = %#v, want exact registry ID grounding", occurrences)
+	}
+	for _, occurrence := range occurrences.Occurrences {
+		if occurrence.SourceRefs[0].SourceID != "npc-session" {
+			t.Fatalf("occurrence evidence = %#v, want current source evidence only", occurrence.SourceRefs)
+		}
+	}
+
+	request := client.requestFor(t, locationoccurrences.PromptID)
+	registryInput := request.Inputs["locations"]
+	if registryInput.MediaType != locationcodec.MediaType || strings.Contains(string(registryInput.Content), "source_refs") || !strings.Contains(string(registryInput.Content), registry.Locations[0].ID) || !strings.Contains(string(registryInput.Content), registry.Locations[1].ID) {
+		t.Fatalf("occurrence registry input = %#v, want source-free generated ID projection", registryInput)
+	}
+	contextArtifact := outputFileContent(t, output.OutputFiles, "evidence-context.json")
+	evidence, err := evidencecontext.New().Decode(contextArtifact)
+	if err != nil {
+		t.Fatalf("Decode(evidence context) error = %v", err)
+	}
+	if !locationEvidenceHasLane(evidence, "locations") || !locationEvidenceHasLane(evidence, "occurrences") {
+		t.Fatalf("evidence context = %#v, want registry and occurrence evidence from their own artifacts", evidence)
+	}
+}
+
+func locationEvidenceHasLane(document evidencecontext.Document, laneID string) bool {
+	for _, context := range document.Contexts {
+		for _, reference := range context.EvidenceRefs {
+			if reference.LaneID == laneID {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func TestLocationOccurrenceConsumerDoesNotRunAfterRejectedRegistry(t *testing.T) {
+	registries := productionNPCRegistries(t)
+	client := &locationHandoffLLMClient{rejectRegistry: true}
+	_, err := runPreparedPipeline(t, registries, resolveLocationPipeline(t, registries), client, pipeline.RunInput{RawInput: readNPCFixture(t)})
+	if err == nil {
+		t.Fatal("Run() error = nil, want missing accepted location registry")
+	}
+	if client.requestCount(locationoccurrences.PromptID) != 0 {
+		t.Fatalf("occurrence requests = %d, want none after rejected registry", client.requestCount(locationoccurrences.PromptID))
+	}
+}
+
+func TestLocationOccurrenceConfigurationRequiresEarlierRegistry(t *testing.T) {
+	registries := productionNPCRegistries(t)
+	cfg, err := configFromYAML(strings.Replace(locationPipelineConfig, "step: identify-locations", "step: track-location-occurrences", 1))
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = cfg.Resolve(config.ResolveInput{PipelineID: "dnd-locations-fixture", Catalog: moduleCatalog(registries)})
+	if err == nil || !strings.Contains(err.Error(), "earlier step") {
+		t.Fatalf("Resolve() error = %v, want an earlier generated registry requirement", err)
+	}
+}
+
+func TestLocationOccurrenceCheckpointTracksGeneratedRegistry(t *testing.T) {
+	registries := productionNPCRegistries(t)
+	checkpoint := newGeneratedReferenceCheckpointLoader()
+	_, err := runPreparedPipeline(t, registries, resolveLocationPipeline(t, registries), &locationHandoffLLMClient{}, pipeline.RunInput{
+		RawInput:   readNPCFixture(t),
+		Checkpoint: checkpoint,
+	})
+	if err != nil {
+		t.Fatalf("Run() error = %v", err)
+	}
+	for _, dependency := range checkpoint.extractDependencies("occurrences") {
+		if dependency.Name == "generated-reference:locations:0" && strings.HasPrefix(dependency.Value, "sha256:") {
+			return
+		}
+	}
+	t.Fatalf("occurrence checkpoint dependencies = %#v, want generated location registry fingerprint", checkpoint.extractDependencies("occurrences"))
+}
+
+func resolveLocationPipeline(t *testing.T, registries pipeline.Registries) pipeline.ResolvedPipeline {
+	t.Helper()
+	cfg, err := configFromYAML(locationPipelineConfig)
+	if err != nil {
+		t.Fatal(err)
+	}
+	effective, err := cfg.Resolve(config.ResolveInput{PipelineID: "dnd-locations-fixture", Catalog: moduleCatalog(registries)})
+	if err != nil {
+		t.Fatalf("Resolve() error = %v", err)
+	}
+	resolved, warnings, err := pipeline.MaterializeReferences(effective.ResolvedPipeline, moduleCatalog(registries), pipeline.ReferenceMaterializationOptions{})
+	if err != nil || len(warnings) != 0 {
+		t.Fatalf("MaterializeReferences() error = %v warnings = %#v", err, warnings)
+	}
+	return resolved
+}
+
+func configFromYAML(content string) (config.Config, error) {
+	fileConfig, err := config.ParseFileConfigYAML([]byte(content))
+	if err != nil {
+		return config.Config{}, err
+	}
+	cfg := config.Default()
+	if err := cfg.ApplyFileConfig(fileConfig); err != nil {
+		return config.Config{}, err
+	}
+	return cfg, nil
+}
+
+const locationPipelineConfig = `version: 4
+cache:
+  chunk_plans:
+    mode: bypass
+  checkpoints: {}
+pipelines:
+  dnd-locations-fixture:
+    input: seriatim
+    output:
+      module: json
+      options:
+        evidence_context:
+          enabled: true
+          lanes: [locations, occurrences]
+    steps:
+      - id: identify-locations
+        artifacts:
+          locations:
+            extract: dnd/locations
+            merge: appendorder
+            normalize: dnd/locations
+      - id: track-location-occurrences
+        references:
+          locations:
+            artifact:
+              step: identify-locations
+              lane: locations
+        artifacts:
+          occurrences:
+            extract: dnd/location-occurrences
+            merge: appendorder
+            normalize: dnd/location-occurrences
+`
+
+type locationHandoffLLMClient struct {
+	mu             sync.Mutex
+	requests       []contracts.StructuredCompletionRequest
+	rejectRegistry bool
+}
+
+func (client *locationHandoffLLMClient) CompleteStructured(ctx context.Context, request contracts.StructuredCompletionRequest, output any) (contracts.StructuredCompletionResponse, error) {
+	if err := ctx.Err(); err != nil {
+		return contracts.StructuredCompletionResponse{}, err
+	}
+	client.mu.Lock()
+	client.requests = append(client.requests, cloneStructuredCompletionRequest(request))
+	client.mu.Unlock()
+	var payload any
+	switch request.PromptID {
+	case locations.PromptID:
+		name := "Moon Gate"
+		if client.rejectRegistry {
+			name = ""
+		}
+		payload = map[string]any{"locations": []any{map[string]any{"name": name, "source_refs": []any{map[string]int{"start_unit_id": 1, "end_unit_id": 1}}}, map[string]any{"name": name, "source_refs": []any{map[string]int{"start_unit_id": 3, "end_unit_id": 3}}}}}
+	case locationnormalize.PromptID:
+		payload = map[string]any{"duplicate_groups": []any{}}
+	case locationoccurrences.PromptID:
+		var projection struct {
+			Locations []struct {
+				ID string `json:"id"`
+			} `json:"locations"`
+		}
+		if err := json.Unmarshal(request.Inputs["locations"].Content, &projection); err != nil {
+			return contracts.StructuredCompletionResponse{}, fmt.Errorf("decode location registry: %w", err)
+		}
+		if len(projection.Locations) != 2 {
+			return contracts.StructuredCompletionResponse{}, fmt.Errorf("generated location registry has %d locations, want 2", len(projection.Locations))
+		}
+		payload = map[string]any{"occurrences": []any{map[string]any{"location_id": projection.Locations[0].ID, "name": "Moon Gate", "kind": "visited", "source_refs": []any{map[string]int{"start_unit_id": 1, "end_unit_id": 1}}}, map[string]any{"location_id": projection.Locations[1].ID, "name": "Moon Gate", "kind": "mentioned", "source_refs": []any{map[string]int{"start_unit_id": 3, "end_unit_id": 3}}}}}
+	default:
+		return contracts.StructuredCompletionResponse{}, fmt.Errorf("unexpected prompt %q", request.PromptID)
+	}
+	content, err := json.Marshal(payload)
+	if err != nil {
+		return contracts.StructuredCompletionResponse{}, err
+	}
+	if err := json.Unmarshal(content, output); err != nil {
+		return contracts.StructuredCompletionResponse{}, err
+	}
+	return contracts.StructuredCompletionResponse{Content: content, Provider: "test", Model: "location-handoff"}, nil
+}
+
+func (client *locationHandoffLLMClient) requestFor(t *testing.T, promptID string) contracts.StructuredCompletionRequest {
+	t.Helper()
+	client.mu.Lock()
+	defer client.mu.Unlock()
+	for _, request := range client.requests {
+		if request.PromptID == promptID {
+			return request
+		}
+	}
+	t.Fatalf("requests = %#v, missing %q", client.requests, promptID)
+	return contracts.StructuredCompletionRequest{}
+}
+func (client *locationHandoffLLMClient) requestCount(promptID string) int {
+	client.mu.Lock()
+	defer client.mu.Unlock()
+	count := 0
+	for _, request := range client.requests {
+		if request.PromptID == promptID {
+			count++
+		}
+	}
+	return count
+}
+
+var _ contracts.StructuredLLMClient = (*locationHandoffLLMClient)(nil)