Verify D&D scene chunker run output

internal/cli/run_test.go

@@ -1062,6 +1062,50 @@ func TestExampleFixtureRunWritesExpectedJSON(t *testing.T) {
 	}
 }
 
+func TestExampleFixtureRunWithDNDScenesRecordsChunkerAndWarnings(t *testing.T) {
+	configPath := writeTestConfig(t, mvpConfigYAMLWithChunk("dnd-session", scenes.Key, "dnd/spells"))
+	inputPath := fixturePath(t, "examples/seriatim-minimal-transcript.json")
+	outputDir := t.TempDir()
+	diagnosticsDir := t.TempDir()
+	client := newSceneRunLLMClient("Scene boundary was ambiguous.")
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	code := RunWithOptions([]string{"run", "dnd-session", "--config", configPath, "--input", inputPath, "--output-dir", outputDir, "--diagnostics-dir", diagnosticsDir}, &stdout, &stderr, Options{
+		LLMClientFactory: fakeLLMFactory(client, nil),
+	})
+
+	if code != 0 {
+		t.Fatalf("RunWithOptions() code = %d, stderr=%q", code, stderr.String())
+	}
+	if client.calls != 2 {
+		t.Fatalf("LLM calls = %d, want chunking and extraction calls", client.calls)
+	}
+	if !strings.Contains(stderr.String(), "1 warning") {
+		t.Fatalf("stderr = %q, want warning count", stderr.String())
+	}
+
+	runOutputDir := onlyChildDir(t, outputDir)
+	manifestBytes := readFile(t, filepath.Join(runOutputDir, "manifest.json"))
+	var manifest artifacts.RunManifest
+	if err := json.Unmarshal(manifestBytes, &manifest); err != nil {
+		t.Fatalf("unmarshal manifest: %v", err)
+	}
+	if manifest.Chunker != scenes.Key {
+		t.Fatalf("manifest chunker = %q, want %q", manifest.Chunker, scenes.Key)
+	}
+	for _, forbidden := range []string{"Source document ID:", "Aria casts Cure Wounds.", "spell_casts", "Scene boundary was ambiguous."} {
+		if strings.Contains(string(manifestBytes), forbidden) {
+			t.Fatalf("manifest leaked %q: %s", forbidden, manifestBytes)
+		}
+	}
+
+	warnings := string(readFile(t, filepath.Join(runOutputDir, "warnings.json")))
+	if !strings.Contains(warnings, "scene_boundary_caveat") || !strings.Contains(warnings, "Scene boundary was ambiguous.") {
+		t.Fatalf("warnings output = %s, want scene boundary caveat", warnings)
+	}
+}
+
 func TestExampleFixtureRunOnlySpells(t *testing.T) {
 	configPath := fixturePath(t, "examples/dnd-spells.config.yml")
 	inputPath := fixturePath(t, "examples/seriatim-minimal-transcript.json")
@@ -1320,6 +1364,7 @@ type fakeRunLLMClient struct {
 	calls            int
 	err              error
 	payload          map[string]any
+	sceneCaveat      string
 }
 
 func newFakeRunLLMClient(invalidSourceRef bool) *fakeRunLLMClient {
@@ -1334,11 +1379,43 @@ func newMalformedRunLLMClient() *fakeRunLLMClient {
 	return &fakeRunLLMClient{payload: map[string]any{}}
 }
 
+func newSceneRunLLMClient(caveat string) *fakeRunLLMClient {
+	return &fakeRunLLMClient{sceneCaveat: caveat}
+}
+
 func (client *fakeRunLLMClient) CompleteStructured(ctx context.Context, req contracts.StructuredCompletionRequest, out any) (contracts.StructuredCompletionResponse, error) {
 	client.calls++
 	if client.err != nil {
 		return contracts.StructuredCompletionResponse{}, client.err
 	}
+	if req.StageName == scenes.Key && client.payload == nil {
+		payload := map[string]any{
+			"scenes": []map[string]any{
+				{
+					"start_unit_id":       "seg-001",
+					"end_unit_id":         "seg-002",
+					"short_title":         "Opening spell",
+					"primary_mode":        "Narrative",
+					"main_participants":   []string{"Aria"},
+					"summary":             "Aria casts a spell.",
+					"boundary_note":       "The provided source units form one scene.",
+					"boundary_confidence": "High",
+				},
+			},
+			"boundary_caveats": []string{},
+		}
+		if client.sceneCaveat != "" {
+			payload["boundary_caveats"] = []string{client.sceneCaveat}
+		}
+		encoded, err := json.Marshal(payload)
+		if err != nil {
+			return contracts.StructuredCompletionResponse{}, err
+		}
+		if err := json.Unmarshal(encoded, out); err != nil {
+			return contracts.StructuredCompletionResponse{}, err
+		}
+		return contracts.StructuredCompletionResponse{Content: encoded}, nil
+	}
 	startUnitID := "seg-001"
 	if client.invalidSourceRef {
 		startUnitID = "missing-segment"