fix: Project-level model config ignored — getLocalLayerValue missing model case

src/__tests__/config.test.ts

@@ -501,6 +501,60 @@ describe('analytics config resolution', () => {
   });
 });
 
+describe('model config resolution', () => {
+  let testDir: string;
+  let originalTaktConfigDir: string | undefined;
+
+  beforeEach(() => {
+    testDir = join(tmpdir(), `takt-test-${randomUUID()}`);
+    mkdirSync(testDir, { recursive: true });
+    originalTaktConfigDir = process.env.TAKT_CONFIG_DIR;
+    process.env.TAKT_CONFIG_DIR = join(testDir, 'global-takt');
+    invalidateGlobalConfigCache();
+  });
+
+  afterEach(() => {
+    if (originalTaktConfigDir === undefined) {
+      delete process.env.TAKT_CONFIG_DIR;
+    } else {
+      process.env.TAKT_CONFIG_DIR = originalTaktConfigDir;
+    }
+    invalidateGlobalConfigCache();
+
+    if (existsSync(testDir)) {
+      rmSync(testDir, { recursive: true, force: true });
+    }
+  });
+
+  it('should resolve project model over global model', () => {
+    const projectConfigDir = getProjectConfigDir(testDir);
+    mkdirSync(projectConfigDir, { recursive: true });
+    writeFileSync(join(projectConfigDir, 'config.yaml'), 'piece: default\nmodel: project-model\n');
+
+    const globalConfigDir = process.env.TAKT_CONFIG_DIR!;
+    mkdirSync(globalConfigDir, { recursive: true });
+    writeFileSync(join(globalConfigDir, 'config.yaml'), 'model: global-model\n');
+
+    expect(resolveConfigValue(testDir, 'model')).toBe('project-model');
+  });
+
+  it('should fallback to global model when project model is not set', () => {
+    const projectConfigDir = getProjectConfigDir(testDir);
+    mkdirSync(projectConfigDir, { recursive: true });
+    writeFileSync(join(projectConfigDir, 'config.yaml'), 'piece: default\n');
+
+    const globalConfigDir = process.env.TAKT_CONFIG_DIR!;
+    mkdirSync(globalConfigDir, { recursive: true });
+    writeFileSync(join(globalConfigDir, 'config.yaml'), 'model: global-model\n');
+
+    expect(resolveConfigValue(testDir, 'model')).toBe('global-model');
+  });
+
+  it('should return undefined when neither project nor global model is set', () => {
+    expect(resolveConfigValue(testDir, 'model')).toBeUndefined();
+  });
+});
+
 describe('isVerboseMode', () => {
   let testDir: string;
   let originalTaktConfigDir: string | undefined;

src/core/models/persisted-global-config.ts

@@ -129,6 +129,7 @@ export interface PersistedGlobalConfig {
 export interface ProjectConfig {
   piece?: string;
   provider?: 'claude' | 'codex' | 'opencode' | 'mock';
+  model?: string;
   providerOptions?: MovementProviderOptions;
   /** Provider-specific permission profiles */
   providerProfiles?: ProviderPermissionProfiles;

src/core/models/schemas.ts

@@ -487,6 +487,7 @@ export const GlobalConfigSchema = z.object({
 export const ProjectConfigSchema = z.object({
   piece: z.string().optional(),
   provider: z.enum(['claude', 'codex', 'opencode', 'mock']).optional(),
+  model: z.string().optional(),
   provider_options: MovementProviderOptionsSchema,
   provider_profiles: ProviderPermissionProfilesSchema,
 });

src/infra/config/resolveConfigValue.ts

@@ -116,6 +116,8 @@ function getLocalLayerValue<K extends ConfigParameterKey>(
       return project.piece as LoadedConfig[K] | undefined;
     case 'provider':
       return project.provider as LoadedConfig[K] | undefined;
+    case 'model':
+      return project.model as LoadedConfig[K] | undefined;
     case 'autoPr':
       return project.auto_pr as LoadedConfig[K] | undefined;
     case 'draftPr':

src/infra/config/types.ts

@@ -12,6 +12,8 @@ export interface ProjectLocalConfig {
   piece?: string;
   /** Provider selection for agent runtime */
   provider?: 'claude' | 'codex' | 'opencode' | 'mock';
+  /** Model selection for agent runtime */
+  model?: string;
   /** Auto-create PR after worktree execution */
   auto_pr?: boolean;
   /** Create PR as draft */