Move prompts into embedded Markdown assets

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) {