Move prompts into embedded Markdown assets

internal/framework/proposal_generation/generate.go

@@ -55,6 +55,7 @@ type Request struct {
 	Config            *config.Config              `json:"-"`
 	Messages          []contracts.LLMMessage      `json:"messages"`
 	Model             string                      `json:"model,omitempty"`
+	PromptMetadata    map[string]any              `json:"prompt_metadata,omitempty"`
 	StageName         string                      `json:"stage_name,omitempty"`
 	StartIndex        int                         `json:"start_index"`
 	LLMClient         contracts.StructuredLLMClient
@@ -137,6 +138,9 @@ func GenerateCandidates(ctx context.Context, req Request) (Result, error) {
 		"start_index":        req.StartIndex,
 		"model":              model,
 	}
+	if len(req.PromptMetadata) > 0 {
+		requestMetadata["prompt_metadata"] = req.PromptMetadata
+	}
 	requestMetadata["response_schema"] = schemaMetadata(responseSchema)
 
 	if writer != nil {

internal/framework/proposal_generation/generate_test.go

@@ -191,6 +191,13 @@ func TestGenerateCandidatesDiagnosticsIncludeSchemaMetadata(t *testing.T) {
 	req := defaultRequest(t)
 	req.LLMClient = client
 	req.DiagnosticsWriter = diag
+	req.PromptMetadata = map[string]any{
+		"prompt_id":      "modules.grammar.proposal",
+		"prompt_version": "v1",
+		"prompt_source":  "builtin",
+		"embedded_path":  "assets/modules/grammar",
+		"sha256":         "abc",
+	}
 
 	_, err := GenerateCandidates(context.Background(), req)
 	if err != nil {
@@ -208,6 +215,13 @@ func TestGenerateCandidatesDiagnosticsIncludeSchemaMetadata(t *testing.T) {
 	if schemaMap["id"] != want.ID || schemaMap["version"] != want.Version || schemaMap["name"] != want.Name || schemaMap["sha256"] != want.SHA256 {
 		t.Fatalf("unexpected diagnostics schema metadata: got=%v want=%+v", schemaMap, want)
 	}
+	promptMap, ok := metadata["prompt_metadata"].(map[string]any)
+	if !ok {
+		t.Fatalf("expected prompt_metadata map, got %T", metadata["prompt_metadata"])
+	}
+	if promptMap["prompt_id"] != "modules.grammar.proposal" || promptMap["prompt_version"] != "v1" || promptMap["prompt_source"] != "builtin" || promptMap["embedded_path"] != "assets/modules/grammar" || promptMap["sha256"] != "abc" {
+		t.Fatalf("unexpected prompt metadata map: %v", promptMap)
+	}
 }
 
 func TestGenerateCandidatesMalformedStructuredResponse(t *testing.T) {