diff --git a/src/__tests__/catalog.test.ts b/src/__tests__/catalog.test.ts
index af9863b..514ea9d 100644
--- a/src/__tests__/catalog.test.ts
+++ b/src/__tests__/catalog.test.ts
@@ -17,8 +17,17 @@ import {
 
 // Mock external dependencies to isolate unit tests
 vi.mock('../infra/config/global/globalConfig.js', () => ({
-  getLanguage: () => 'en',
-  getBuiltinPiecesEnabled: () => true,
+  loadGlobalConfig: () => ({}),
+}));
+
+vi.mock('../infra/config/loadConfig.js', () => ({
+  loadConfig: () => ({
+    global: {
+      language: 'en',
+      enableBuiltinPieces: true,
+    },
+    project: {},
+  }),
 }));
 
 const mockLogError = vi.fn();
diff --git a/src/__tests__/cli-routing-issue-resolve.test.ts b/src/__tests__/cli-routing-issue-resolve.test.ts
index 72b99b3..483b5c3 100644
--- a/src/__tests__/cli-routing-issue-resolve.test.ts
+++ b/src/__tests__/cli-routing-issue-resolve.test.ts
@@ -76,7 +76,7 @@ vi.mock('../infra/task/index.js', () => ({
 
 vi.mock('../infra/config/index.js', () => ({
   getPieceDescription: vi.fn(() => ({ name: 'default', description: 'test piece', pieceStructure: '', movementPreviews: [] })),
-  loadConfig: vi.fn(() => ({ global: { interactivePreviewMovements: 3 }, project: {} })),
+  resolveConfigValues: vi.fn(() => ({ language: 'en', interactivePreviewMovements: 3, provider: 'claude' })),
 }));
 
 vi.mock('../shared/constants.js', () => ({
@@ -107,7 +107,7 @@ vi.mock('../app/cli/helpers.js', () => ({
 import { checkGhCli, fetchIssue, formatIssueAsTask, parseIssueNumbers } from '../infra/github/issue.js';
 import { selectAndExecuteTask, determinePiece, createIssueFromTask, saveTaskFromInteractive } from '../features/tasks/index.js';
 import { interactiveMode, selectRecentSession } from '../features/interactive/index.js';
-import { loadConfig } from '../infra/config/index.js';
+import { resolveConfigValues } from '../infra/config/index.js';
 import { confirm } from '../shared/prompt/index.js';
 import { isDirectTask } from '../app/cli/helpers.js';
 import { executeDefaultAction } from '../app/cli/routing.js';
@@ -123,7 +123,7 @@ const mockCreateIssueFromTask = vi.mocked(createIssueFromTask);
 const mockSaveTaskFromInteractive = vi.mocked(saveTaskFromInteractive);
 const mockInteractiveMode = vi.mocked(interactiveMode);
 const mockSelectRecentSession = vi.mocked(selectRecentSession);
-const mockLoadConfig = vi.mocked(loadConfig);
+const mockResolveConfigValues = vi.mocked(resolveConfigValues);
 const mockConfirm = vi.mocked(confirm);
 const mockIsDirectTask = vi.mocked(isDirectTask);
 const mockTaskRunnerListAllTaskItems = vi.mocked(mockListAllTaskItems);
@@ -483,7 +483,7 @@ describe('Issue resolution in routing', () => {
   describe('session selection with provider=claude', () => {
     it('should pass selected session ID to interactiveMode when provider is claude', async () => {
       // Given
-      mockLoadConfig.mockReturnValue({ global: { interactivePreviewMovements: 3, provider: 'claude' }, project: {} });
+      mockResolveConfigValues.mockReturnValue({ language: 'en', interactivePreviewMovements: 3, provider: 'claude' });
       mockConfirm.mockResolvedValue(true);
       mockSelectRecentSession.mockResolvedValue('session-xyz');
 
@@ -506,7 +506,7 @@ describe('Issue resolution in routing', () => {
 
     it('should not call selectRecentSession when user selects no in confirmation', async () => {
       // Given
-      mockLoadConfig.mockReturnValue({ global: { interactivePreviewMovements: 3, provider: 'claude' }, project: {} });
+      mockResolveConfigValues.mockReturnValue({ language: 'en', interactivePreviewMovements: 3, provider: 'claude' });
       mockConfirm.mockResolvedValue(false);
 
       // When
@@ -525,7 +525,7 @@ describe('Issue resolution in routing', () => {
 
     it('should not call selectRecentSession when provider is not claude', async () => {
       // Given
-      mockLoadConfig.mockReturnValue({ global: { interactivePreviewMovements: 3, provider: 'openai' }, project: {} });
+      mockResolveConfigValues.mockReturnValue({ language: 'en', interactivePreviewMovements: 3, provider: 'openai' });
 
       // When
       await executeDefaultAction();
diff --git a/src/__tests__/config.test.ts b/src/__tests__/config.test.ts
index 492cfd2..4dc3dea 100644
--- a/src/__tests__/config.test.ts
+++ b/src/__tests__/config.test.ts
@@ -41,13 +41,13 @@ import {
 
 describe('getBuiltinPiece', () => {
   it('should return builtin piece when it exists in resources', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     expect(piece).not.toBeNull();
     expect(piece!.name).toBe('default');
   });
 
   it('should resolve builtin instruction_template without projectCwd', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     expect(piece).not.toBeNull();
 
     const planMovement = piece!.movements.find((movement) => movement.name === 'plan');
@@ -56,15 +56,15 @@ describe('getBuiltinPiece', () => {
   });
 
   it('should return null for non-existent piece names', () => {
-    expect(getBuiltinPiece('nonexistent-piece')).toBeNull();
-    expect(getBuiltinPiece('unknown')).toBeNull();
-    expect(getBuiltinPiece('')).toBeNull();
+    expect(getBuiltinPiece('nonexistent-piece', process.cwd())).toBeNull();
+    expect(getBuiltinPiece('unknown', process.cwd())).toBeNull();
+    expect(getBuiltinPiece('', process.cwd())).toBeNull();
   });
 });
 
 describe('default piece parallel reviewers movement', () => {
   it('should have a reviewers movement with parallel sub-movements', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     expect(piece).not.toBeNull();
 
     const reviewersMovement = piece!.movements.find((s) => s.name === 'reviewers');
@@ -74,7 +74,7 @@ describe('default piece parallel reviewers movement', () => {
   });
 
   it('should have arch-review and qa-review as parallel sub-movements', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     const reviewersMovement = piece!.movements.find((s) => s.name === 'reviewers')!;
     const subMovementNames = reviewersMovement.parallel!.map((s) => s.name);
 
@@ -83,7 +83,7 @@ describe('default piece parallel reviewers movement', () => {
   });
 
   it('should have aggregate conditions on the reviewers parent movement', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     const reviewersMovement = piece!.movements.find((s) => s.name === 'reviewers')!;
 
     expect(reviewersMovement.rules).toBeDefined();
@@ -101,7 +101,7 @@ describe('default piece parallel reviewers movement', () => {
   });
 
   it('should have matching conditions on sub-movements for aggregation', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     const reviewersMovement = piece!.movements.find((s) => s.name === 'reviewers')!;
 
     for (const subMovement of reviewersMovement.parallel!) {
@@ -113,7 +113,7 @@ describe('default piece parallel reviewers movement', () => {
   });
 
   it('should have ai_review transitioning to reviewers movement', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     const aiReviewMovement = piece!.movements.find((s) => s.name === 'ai_review')!;
 
     const approveRule = aiReviewMovement.rules!.find((r) => r.next === 'reviewers');
@@ -121,7 +121,7 @@ describe('default piece parallel reviewers movement', () => {
   });
 
   it('should have ai_fix transitioning to ai_review movement', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     const aiFixMovement = piece!.movements.find((s) => s.name === 'ai_fix')!;
 
     const fixedRule = aiFixMovement.rules!.find((r) => r.next === 'ai_review');
@@ -129,7 +129,7 @@ describe('default piece parallel reviewers movement', () => {
   });
 
   it('should have fix movement transitioning back to reviewers', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     const fixMovement = piece!.movements.find((s) => s.name === 'fix')!;
 
     const fixedRule = fixMovement.rules!.find((r) => r.next === 'reviewers');
@@ -137,7 +137,7 @@ describe('default piece parallel reviewers movement', () => {
   });
 
   it('should not have old separate review/security_review/improve movements', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     const movementNames = piece!.movements.map((s) => s.name);
 
     expect(movementNames).not.toContain('review');
@@ -147,7 +147,7 @@ describe('default piece parallel reviewers movement', () => {
   });
 
   it('should have sub-movements with correct agents', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     const reviewersMovement = piece!.movements.find((s) => s.name === 'reviewers')!;
 
     const archReview = reviewersMovement.parallel!.find((s) => s.name === 'arch-review')!;
@@ -158,7 +158,7 @@ describe('default piece parallel reviewers movement', () => {
   });
 
   it('should have output contracts configured on sub-movements', () => {
-    const piece = getBuiltinPiece('default');
+    const piece = getBuiltinPiece('default', process.cwd());
     const reviewersMovement = piece!.movements.find((s) => s.name === 'reviewers')!;
 
     const archReview = reviewersMovement.parallel!.find((s) => s.name === 'arch-review')!;
@@ -290,7 +290,7 @@ describe('loadPersonaPromptFromPath (builtin paths)', () => {
     const personaPath = join(builtinPersonasDir, 'coder.md');
 
     if (existsSync(personaPath)) {
-      const prompt = loadPersonaPromptFromPath(personaPath);
+      const prompt = loadPersonaPromptFromPath(personaPath, process.cwd());
       expect(prompt).toBeTruthy();
       expect(typeof prompt).toBe('string');
     }
diff --git a/src/__tests__/engine-provider-options.test.ts b/src/__tests__/engine-provider-options.test.ts
index 24cab26..c17b3af 100644
--- a/src/__tests__/engine-provider-options.test.ts
+++ b/src/__tests__/engine-provider-options.test.ts
@@ -78,12 +78,9 @@ describe('PieceEngine provider_options resolution', () => {
     engine = new PieceEngine(config, tmpDir, 'test task', {
       projectCwd: tmpDir,
       provider: 'claude',
-      globalProviderOptions: {
+      providerOptions: {
         codex: { networkAccess: true },
         claude: { sandbox: { allowUnsandboxedCommands: false } },
-      },
-      projectProviderOptions: {
-        claude: { sandbox: { allowUnsandboxedCommands: true } },
         opencode: { networkAccess: true },
       },
     });
@@ -96,7 +93,7 @@ describe('PieceEngine provider_options resolution', () => {
       opencode: { networkAccess: true },
       claude: {
         sandbox: {
-          allowUnsandboxedCommands: true,
+          allowUnsandboxedCommands: false,
           excludedCommands: ['./gradlew'],
         },
       },
@@ -123,7 +120,7 @@ describe('PieceEngine provider_options resolution', () => {
     engine = new PieceEngine(config, tmpDir, 'test task', {
       projectCwd: tmpDir,
       provider: 'claude',
-      globalProviderOptions: {
+      providerOptions: {
         codex: { networkAccess: true },
       },
     });
diff --git a/src/__tests__/global-pieceCategories.test.ts b/src/__tests__/global-pieceCategories.test.ts
index 286ac22..dc148d1 100644
--- a/src/__tests__/global-pieceCategories.test.ts
+++ b/src/__tests__/global-pieceCategories.test.ts
@@ -7,14 +7,14 @@ import { tmpdir } from 'node:os';
 import { dirname, join } from 'node:path';
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 
-const loadGlobalConfigMock = vi.hoisted(() => vi.fn());
+const loadConfigMock = vi.hoisted(() => vi.fn());
 
 vi.mock('../infra/config/paths.js', () => ({
   getGlobalConfigDir: () => '/tmp/.takt',
 }));
 
-vi.mock('../infra/config/global/globalConfig.js', () => ({
-  loadGlobalConfig: loadGlobalConfigMock,
+vi.mock('../infra/config/loadConfig.js', () => ({
+  loadConfig: loadConfigMock,
 }));
 
 const { getPieceCategoriesPath, resetPieceCategories } = await import(
@@ -28,17 +28,18 @@ function createTempCategoriesPath(): string {
 
 describe('getPieceCategoriesPath', () => {
   beforeEach(() => {
-    loadGlobalConfigMock.mockReset();
+    loadConfigMock.mockReset();
   });
 
   it('should return configured path when pieceCategoriesFile is set', () => {
     // Given
-    loadGlobalConfigMock.mockReturnValue({
-      pieceCategoriesFile: '/custom/piece-categories.yaml',
+    loadConfigMock.mockReturnValue({
+      global: { pieceCategoriesFile: '/custom/piece-categories.yaml' },
+      project: {},
     });
 
     // When
-    const path = getPieceCategoriesPath();
+    const path = getPieceCategoriesPath(process.cwd());
 
     // Then
     expect(path).toBe('/custom/piece-categories.yaml');
@@ -46,10 +47,10 @@ describe('getPieceCategoriesPath', () => {
 
   it('should return default path when pieceCategoriesFile is not set', () => {
     // Given
-    loadGlobalConfigMock.mockReturnValue({});
+    loadConfigMock.mockReturnValue({ global: {}, project: {} });
 
     // When
-    const path = getPieceCategoriesPath();
+    const path = getPieceCategoriesPath(process.cwd());
 
     // Then
     expect(path).toBe('/tmp/.takt/preferences/piece-categories.yaml');
@@ -57,12 +58,12 @@ describe('getPieceCategoriesPath', () => {
 
   it('should rethrow when global config loading fails', () => {
     // Given
-    loadGlobalConfigMock.mockImplementation(() => {
+    loadConfigMock.mockImplementation(() => {
       throw new Error('invalid global config');
     });
 
     // When / Then
-    expect(() => getPieceCategoriesPath()).toThrow('invalid global config');
+    expect(() => getPieceCategoriesPath(process.cwd())).toThrow('invalid global config');
   });
 });
 
@@ -70,7 +71,7 @@ describe('resetPieceCategories', () => {
   const tempRoots: string[] = [];
 
   beforeEach(() => {
-    loadGlobalConfigMock.mockReset();
+    loadConfigMock.mockReset();
   });
 
   afterEach(() => {
@@ -84,12 +85,13 @@ describe('resetPieceCategories', () => {
     // Given
     const categoriesPath = createTempCategoriesPath();
     tempRoots.push(dirname(dirname(categoriesPath)));
-    loadGlobalConfigMock.mockReturnValue({
-      pieceCategoriesFile: categoriesPath,
+    loadConfigMock.mockReturnValue({
+      global: { pieceCategoriesFile: categoriesPath },
+      project: {},
     });
 
     // When
-    resetPieceCategories();
+    resetPieceCategories(process.cwd());
 
     // Then
     expect(existsSync(dirname(categoriesPath))).toBe(true);
@@ -102,14 +104,15 @@ describe('resetPieceCategories', () => {
     const categoriesDir = dirname(categoriesPath);
     const tempRoot = dirname(categoriesDir);
     tempRoots.push(tempRoot);
-    loadGlobalConfigMock.mockReturnValue({
-      pieceCategoriesFile: categoriesPath,
+    loadConfigMock.mockReturnValue({
+      global: { pieceCategoriesFile: categoriesPath },
+      project: {},
     });
     mkdirSync(categoriesDir, { recursive: true });
     writeFileSync(categoriesPath, 'piece_categories:\n  old:\n    - stale-piece\n', 'utf-8');
 
     // When
-    resetPieceCategories();
+    resetPieceCategories(process.cwd());
 
     // Then
     expect(readFileSync(categoriesPath, 'utf-8')).toBe('piece_categories: {}\n');
diff --git a/src/__tests__/it-notification-sound.test.ts b/src/__tests__/it-notification-sound.test.ts
index 5f4d4a0..de91f1d 100644
--- a/src/__tests__/it-notification-sound.test.ts
+++ b/src/__tests__/it-notification-sound.test.ts
@@ -118,6 +118,10 @@ vi.mock('../infra/config/index.js', () => ({
   loadWorktreeSessions: vi.fn().mockReturnValue({}),
   updateWorktreeSession: vi.fn(),
   loadGlobalConfig: mockLoadGlobalConfig,
+  loadConfig: vi.fn().mockImplementation(() => ({
+    global: mockLoadGlobalConfig(),
+    project: {},
+  })),
   saveSessionState: vi.fn(),
   ensureDir: vi.fn(),
   writeFileAtomic: vi.fn(),
diff --git a/src/__tests__/it-piece-loader.test.ts b/src/__tests__/it-piece-loader.test.ts
index 1572c14..5ce414b 100644
--- a/src/__tests__/it-piece-loader.test.ts
+++ b/src/__tests__/it-piece-loader.test.ts
@@ -4,7 +4,7 @@
  * Tests the 3-tier piece resolution (project-local → user → builtin)
  * and YAML parsing including special rule syntax (ai(), all(), any()).
  *
- * Mocked: globalConfig (for language/builtins)
+ * Mocked: loadConfig (for language/builtins)
  * Not mocked: loadPiece, parsePiece, rule parsing
  */
 
@@ -18,9 +18,17 @@ const languageState = vi.hoisted(() => ({ value: 'en' as 'en' | 'ja' }));
 
 vi.mock('../infra/config/global/globalConfig.js', () => ({
   loadGlobalConfig: vi.fn().mockReturnValue({}),
-  getLanguage: vi.fn(() => languageState.value),
-  getDisabledBuiltins: vi.fn().mockReturnValue([]),
-  getBuiltinPiecesEnabled: vi.fn().mockReturnValue(true),
+}));
+
+vi.mock('../infra/config/loadConfig.js', () => ({
+  loadConfig: vi.fn(() => ({
+    global: {
+      language: languageState.value,
+      disabledBuiltins: [],
+      enableBuiltinPieces: true,
+    },
+    project: {},
+  })),
 }));
 
 // --- Imports (after mocks) ---
@@ -38,6 +46,7 @@ function createTestDir(): string {
 
 describe('Piece Loader IT: builtin piece loading', () => {
   let testDir: string;
+  const builtinNames = listBuiltinPieceNames(process.cwd(), { includeDisabled: true });
 
   beforeEach(() => {
     testDir = createTestDir();
@@ -48,8 +57,6 @@ describe('Piece Loader IT: builtin piece loading', () => {
     rmSync(testDir, { recursive: true, force: true });
   });
 
-  const builtinNames = listBuiltinPieceNames({ includeDisabled: true });
-
   for (const name of builtinNames) {
     it(`should load builtin piece: ${name}`, () => {
       const config = loadPiece(name, testDir);
@@ -85,7 +92,7 @@ describe('Piece Loader IT: builtin piece loading', () => {
   it('should load e2e-test as a builtin piece in ja locale', () => {
     languageState.value = 'ja';
 
-    const jaBuiltinNames = listBuiltinPieceNames({ includeDisabled: true });
+    const jaBuiltinNames = listBuiltinPieceNames(testDir, { includeDisabled: true });
     expect(jaBuiltinNames).toContain('e2e-test');
 
     const config = loadPiece('e2e-test', testDir);
diff --git a/src/__tests__/it-piece-patterns.test.ts b/src/__tests__/it-piece-patterns.test.ts
index 9c1fb65..88dce19 100644
--- a/src/__tests__/it-piece-patterns.test.ts
+++ b/src/__tests__/it-piece-patterns.test.ts
@@ -57,6 +57,17 @@ vi.mock('../infra/config/project/projectConfig.js', () => ({
   loadProjectConfig: vi.fn().mockReturnValue({}),
 }));
 
+vi.mock('../infra/config/loadConfig.js', () => ({
+  loadConfig: vi.fn().mockReturnValue({
+    global: {
+      language: 'en',
+      enableBuiltinPieces: true,
+      disabledBuiltins: [],
+    },
+    project: {},
+  }),
+}));
+
 // --- Imports (after mocks) ---
 
 import { PieceEngine } from '../core/piece/index.js';
diff --git a/src/__tests__/it-pipeline-modes.test.ts b/src/__tests__/it-pipeline-modes.test.ts
index ee9314b..e2aa3e2 100644
--- a/src/__tests__/it-pipeline-modes.test.ts
+++ b/src/__tests__/it-pipeline-modes.test.ts
@@ -118,7 +118,11 @@ vi.mock('../infra/config/global/globalConfig.js', async (importOriginal) => {
   const original = await importOriginal<typeof import('../infra/config/global/globalConfig.js')>();
   return {
     ...original,
-    loadGlobalConfig: vi.fn().mockReturnValue({}),
+    loadGlobalConfig: vi.fn().mockReturnValue({
+      language: 'en',
+      enableBuiltinPieces: true,
+      disabledBuiltins: [],
+    }),
     getLanguage: vi.fn().mockReturnValue('en'),
     getDisabledBuiltins: vi.fn().mockReturnValue([]),
   };
diff --git a/src/__tests__/it-pipeline.test.ts b/src/__tests__/it-pipeline.test.ts
index 1262957..3efcf89 100644
--- a/src/__tests__/it-pipeline.test.ts
+++ b/src/__tests__/it-pipeline.test.ts
@@ -100,7 +100,11 @@ vi.mock('../infra/config/global/globalConfig.js', async (importOriginal) => {
   const original = await importOriginal<typeof import('../infra/config/global/globalConfig.js')>();
   return {
     ...original,
-    loadGlobalConfig: vi.fn().mockReturnValue({}),
+    loadGlobalConfig: vi.fn().mockReturnValue({
+      language: 'en',
+      enableBuiltinPieces: true,
+      disabledBuiltins: [],
+    }),
     getLanguage: vi.fn().mockReturnValue('en'),
   };
 });
diff --git a/src/__tests__/it-sigint-interrupt.test.ts b/src/__tests__/it-sigint-interrupt.test.ts
index e15226b..dfe3e9f 100644
--- a/src/__tests__/it-sigint-interrupt.test.ts
+++ b/src/__tests__/it-sigint-interrupt.test.ts
@@ -89,6 +89,10 @@ vi.mock('../infra/config/index.js', () => ({
   loadWorktreeSessions: vi.fn().mockReturnValue({}),
   updateWorktreeSession: vi.fn(),
   loadGlobalConfig: vi.fn().mockReturnValue({ provider: 'claude' }),
+  loadConfig: vi.fn().mockReturnValue({
+    global: { provider: 'claude' },
+    project: {},
+  }),
   saveSessionState: vi.fn(),
   ensureDir: vi.fn(),
   writeFileAtomic: vi.fn(),
diff --git a/src/__tests__/options-builder.test.ts b/src/__tests__/options-builder.test.ts
index bda6033..c9e2998 100644
--- a/src/__tests__/options-builder.test.ts
+++ b/src/__tests__/options-builder.test.ts
@@ -16,8 +16,8 @@ function createMovement(overrides: Partial<PieceMovement> = {}): PieceMovement {
 function createBuilder(step: PieceMovement, engineOverrides: Partial<PieceEngineOptions> = {}): OptionsBuilder {
   const engineOptions: PieceEngineOptions = {
     projectCwd: '/project',
-    globalProvider: 'codex',
-    globalProviderProfiles: {
+    provider: 'codex',
+    providerProfiles: {
       codex: {
         defaultPermissionMode: 'full',
       },
@@ -60,10 +60,8 @@ describe('OptionsBuilder.buildBaseOptions', () => {
   it('uses default profile when provider_profiles are not provided', () => {
     const step = createMovement();
     const builder = createBuilder(step, {
-      globalProvider: undefined,
-      globalProviderProfiles: undefined,
-      projectProvider: undefined,
       provider: undefined,
+      providerProfiles: undefined,
     });
 
     const options = builder.buildBaseOptions(step);
@@ -78,11 +76,8 @@ describe('OptionsBuilder.buildBaseOptions', () => {
       },
     });
     const builder = createBuilder(step, {
-      globalProviderOptions: {
+      providerOptions: {
         codex: { networkAccess: true },
-        claude: { sandbox: { allowUnsandboxedCommands: false } },
-      },
-      projectProviderOptions: {
         claude: { sandbox: { allowUnsandboxedCommands: true } },
         opencode: { networkAccess: true },
       },
@@ -105,10 +100,7 @@ describe('OptionsBuilder.buildBaseOptions', () => {
   it('falls back to global/project provider options when movement has none', () => {
     const step = createMovement();
     const builder = createBuilder(step, {
-      globalProviderOptions: {
-        codex: { networkAccess: true },
-      },
-      projectProviderOptions: {
+      providerOptions: {
         codex: { networkAccess: false },
       },
     });
diff --git a/src/__tests__/piece-builtin-toggle.test.ts b/src/__tests__/piece-builtin-toggle.test.ts
index 8ae0242..c5b00bd 100644
--- a/src/__tests__/piece-builtin-toggle.test.ts
+++ b/src/__tests__/piece-builtin-toggle.test.ts
@@ -17,6 +17,17 @@ vi.mock('../infra/config/global/globalConfig.js', async (importOriginal) => {
   };
 });
 
+vi.mock('../infra/config/loadConfig.js', () => ({
+  loadConfig: () => ({
+    global: {
+      language: 'en',
+      enableBuiltinPieces: false,
+      disabledBuiltins: [],
+    },
+    project: {},
+  }),
+}));
+
 const { listPieces } = await import('../infra/config/loaders/pieceLoader.js');
 
 const SAMPLE_PIECE = `name: test-piece
diff --git a/src/__tests__/piece-category-config.test.ts b/src/__tests__/piece-category-config.test.ts
index 1a164ff..a485a4d 100644
--- a/src/__tests__/piece-category-config.test.ts
+++ b/src/__tests__/piece-category-config.test.ts
@@ -22,12 +22,21 @@ vi.mock('../infra/config/global/globalConfig.js', async (importOriginal) => {
   const original = await importOriginal() as Record<string, unknown>;
   return {
     ...original,
-    getLanguage: () => languageState.value,
-    getBuiltinPiecesEnabled: () => true,
-    getDisabledBuiltins: () => [],
+    loadGlobalConfig: () => ({}),
   };
 });
 
+vi.mock('../infra/config/loadConfig.js', () => ({
+  loadConfig: () => ({
+    global: {
+      language: languageState.value,
+      enableBuiltinPieces: true,
+      disabledBuiltins: [],
+    },
+    project: {},
+  }),
+}));
+
 vi.mock('../infra/resources/index.js', async (importOriginal) => {
   const original = await importOriginal() as Record<string, unknown>;
   return {
@@ -92,7 +101,7 @@ describe('piece category config loading', () => {
   });
 
   it('should return null when builtin categories file is missing', () => {
-    const config = getPieceCategories();
+    const config = getPieceCategories(testDir);
     expect(config).toBeNull();
   });
 
@@ -104,7 +113,7 @@ piece_categories:
       - default
 `);
 
-    const config = loadDefaultCategories();
+    const config = loadDefaultCategories(testDir);
     expect(config).not.toBeNull();
     expect(config!.pieceCategories).toEqual([
       { name: 'Quick Start', pieces: ['default'], children: [] },
@@ -125,7 +134,7 @@ show_others_category: true
 others_category_name: Others
 `);
 
-    const config = getPieceCategories();
+    const config = getPieceCategories(testDir);
     expect(config).not.toBeNull();
     expect(config!.pieceCategories).toEqual([
       { name: 'Main', pieces: ['default'], children: [] },
@@ -165,7 +174,7 @@ show_others_category: false
 others_category_name: Unclassified
 `);
 
-    const config = getPieceCategories();
+    const config = getPieceCategories(testDir);
     expect(config).not.toBeNull();
     expect(config!.pieceCategories).toEqual([
       {
@@ -207,7 +216,7 @@ piece_categories:
       - e2e-test
 `);
 
-    const config = getPieceCategories();
+    const config = getPieceCategories(testDir);
     expect(config).not.toBeNull();
     expect(config!.pieceCategories).toEqual([
       { name: 'レビュー', pieces: ['review-only', 'e2e-test'], children: [] },
@@ -232,7 +241,7 @@ show_others_category: false
 others_category_name: Unclassified
 `);
 
-    const config = getPieceCategories();
+    const config = getPieceCategories(testDir);
     expect(config).not.toBeNull();
     expect(config!.pieceCategories).toEqual([
       { name: 'Main', pieces: ['default'], children: [] },
@@ -278,7 +287,7 @@ describe('buildCategorizedPieces', () => {
       othersCategoryName: 'Others',
     };
 
-    const categorized = buildCategorizedPieces(allPieces, config);
+    const categorized = buildCategorizedPieces(allPieces, config, process.cwd());
     expect(categorized.categories).toEqual([
       {
         name: 'Main',
@@ -310,7 +319,7 @@ describe('buildCategorizedPieces', () => {
       othersCategoryName: 'Others',
     };
 
-    const categorized = buildCategorizedPieces(allPieces, config);
+    const categorized = buildCategorizedPieces(allPieces, config, process.cwd());
     expect(categorized.categories).toEqual([
       { name: 'Main', pieces: ['default'], children: [] },
       { name: 'Others', pieces: ['extra'], children: [] },
@@ -334,7 +343,7 @@ describe('buildCategorizedPieces', () => {
       othersCategoryName: 'Others',
     };
 
-    const categorized = buildCategorizedPieces(allPieces, config);
+    const categorized = buildCategorizedPieces(allPieces, config, process.cwd());
     expect(categorized.categories).toEqual([
       { name: 'Main', pieces: ['default'], children: [] },
     ]);
diff --git a/src/__tests__/pieceExecution-debug-prompts.test.ts b/src/__tests__/pieceExecution-debug-prompts.test.ts
index 5fb8402..d6ab8e5 100644
--- a/src/__tests__/pieceExecution-debug-prompts.test.ts
+++ b/src/__tests__/pieceExecution-debug-prompts.test.ts
@@ -91,6 +91,10 @@ vi.mock('../infra/config/index.js', () => ({
   loadWorktreeSessions: vi.fn().mockReturnValue({}),
   updateWorktreeSession: vi.fn(),
   loadGlobalConfig: vi.fn().mockReturnValue({ provider: 'claude' }),
+  loadConfig: vi.fn().mockReturnValue({
+    global: { provider: 'claude' },
+    project: {},
+  }),
   saveSessionState: vi.fn(),
   ensureDir: vi.fn(),
   writeFileAtomic: vi.fn(),
diff --git a/src/__tests__/resetCategories.test.ts b/src/__tests__/resetCategories.test.ts
index 6ab7577..1623955 100644
--- a/src/__tests__/resetCategories.test.ts
+++ b/src/__tests__/resetCategories.test.ts
@@ -31,13 +31,14 @@ describe('resetCategoriesToDefault', () => {
 
   it('should reset user category overlay and show updated message', async () => {
     // Given
+    const cwd = '/tmp/test-cwd';
 
     // When
-    await resetCategoriesToDefault();
+    await resetCategoriesToDefault(cwd);
 
     // Then
     expect(mockHeader).toHaveBeenCalledWith('Reset Categories');
-    expect(mockResetPieceCategories).toHaveBeenCalledTimes(1);
+    expect(mockResetPieceCategories).toHaveBeenCalledWith(cwd);
     expect(mockSuccess).toHaveBeenCalledWith('User category overlay reset.');
     expect(mockInfo).toHaveBeenCalledWith('  /tmp/user-piece-categories.yaml');
   });
diff --git a/src/__tests__/taskExecution.test.ts b/src/__tests__/taskExecution.test.ts
index dbe547d..349fd9b 100644
--- a/src/__tests__/taskExecution.test.ts
+++ b/src/__tests__/taskExecution.test.ts
@@ -5,13 +5,12 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 import type { TaskInfo } from '../infra/task/index.js';
 
-const { mockResolveTaskExecution, mockExecutePiece, mockLoadPieceByIdentifier, mockLoadGlobalConfig, mockLoadProjectConfig, mockBuildTaskResult, mockPersistTaskResult, mockPersistTaskError, mockPostExecutionFlow } =
+const { mockResolveTaskExecution, mockExecutePiece, mockLoadPieceByIdentifier, mockResolveConfigValues, mockBuildTaskResult, mockPersistTaskResult, mockPersistTaskError, mockPostExecutionFlow } =
   vi.hoisted(() => ({
     mockResolveTaskExecution: vi.fn(),
     mockExecutePiece: vi.fn(),
     mockLoadPieceByIdentifier: vi.fn(),
-    mockLoadGlobalConfig: vi.fn(),
-    mockLoadProjectConfig: vi.fn(),
+    mockResolveConfigValues: vi.fn(),
     mockBuildTaskResult: vi.fn(),
     mockPersistTaskResult: vi.fn(),
     mockPersistTaskError: vi.fn(),
@@ -39,10 +38,7 @@ vi.mock('../features/tasks/execute/postExecution.js', () => ({
 vi.mock('../infra/config/index.js', () => ({
   loadPieceByIdentifier: (...args: unknown[]) => mockLoadPieceByIdentifier(...args),
   isPiecePath: () => false,
-  loadConfig: () => ({
-    global: mockLoadGlobalConfig(),
-    project: mockLoadProjectConfig(),
-  }),
+  resolveConfigValues: (...args: unknown[]) => mockResolveConfigValues(...args),
 }));
 
 vi.mock('../shared/ui/index.js', () => ({
@@ -87,21 +83,19 @@ describe('executeAndCompleteTask', () => {
       name: 'default',
       movements: [],
     });
-    mockLoadGlobalConfig.mockReturnValue({
+    mockResolveConfigValues.mockReturnValue({
       language: 'en',
       provider: 'claude',
+      model: undefined,
       personaProviders: {},
       providerProfiles: {},
       providerOptions: {
         claude: { sandbox: { allowUnsandboxedCommands: true } },
       },
-    });
-    mockLoadProjectConfig.mockReturnValue({
-      provider: 'claude',
-      providerProfiles: {},
-      providerOptions: {
-        opencode: { networkAccess: true },
-      },
+      notificationSound: true,
+      notificationSoundEvents: {},
+      concurrency: 1,
+      taskPollIntervalMs: 500,
     });
     mockBuildTaskResult.mockReturnValue({ success: true });
     mockResolveTaskExecution.mockResolvedValue({
@@ -140,16 +134,12 @@ describe('executeAndCompleteTask', () => {
     const pieceExecutionOptions = mockExecutePiece.mock.calls[0]?.[3] as {
       taskDisplayLabel?: string;
       taskPrefix?: string;
-      globalProviderOptions?: unknown;
-      projectProviderOptions?: unknown;
+      providerOptions?: unknown;
     };
     expect(pieceExecutionOptions?.taskDisplayLabel).toBe(taskDisplayLabel);
     expect(pieceExecutionOptions?.taskPrefix).toBe(taskDisplayLabel);
-    expect(pieceExecutionOptions?.globalProviderOptions).toEqual({
+    expect(pieceExecutionOptions?.providerOptions).toEqual({
       claude: { sandbox: { allowUnsandboxedCommands: true } },
     });
-    expect(pieceExecutionOptions?.projectProviderOptions).toEqual({
-      opencode: { networkAccess: true },
-    });
   });
 });
diff --git a/src/__tests__/taskInstructionActions.test.ts b/src/__tests__/taskInstructionActions.test.ts
index 83d12e6..663cd7b 100644
--- a/src/__tests__/taskInstructionActions.test.ts
+++ b/src/__tests__/taskInstructionActions.test.ts
@@ -48,7 +48,7 @@ vi.mock('../infra/task/index.js', () => ({
 }));
 
 vi.mock('../infra/config/index.js', () => ({
-  loadGlobalConfig: vi.fn(() => ({ interactivePreviewMovements: 3, language: 'en' })),
+  resolveConfigValues: vi.fn(() => ({ interactivePreviewMovements: 3, language: 'en' })),
   getPieceDescription: vi.fn(() => ({
     name: 'default',
     description: 'desc',
diff --git a/src/__tests__/taskRetryActions.test.ts b/src/__tests__/taskRetryActions.test.ts
index b65f54d..46dd579 100644
--- a/src/__tests__/taskRetryActions.test.ts
+++ b/src/__tests__/taskRetryActions.test.ts
@@ -4,7 +4,7 @@ const {
   mockExistsSync,
   mockSelectPiece,
   mockSelectOption,
-  mockLoadGlobalConfig,
+  mockResolveConfigValue,
   mockLoadPieceByIdentifier,
   mockGetPieceDescription,
   mockRunRetryMode,
@@ -16,7 +16,7 @@ const {
   mockExistsSync: vi.fn(() => true),
   mockSelectPiece: vi.fn(),
   mockSelectOption: vi.fn(),
-  mockLoadGlobalConfig: vi.fn(),
+  mockResolveConfigValue: vi.fn(),
   mockLoadPieceByIdentifier: vi.fn(),
   mockGetPieceDescription: vi.fn(() => ({
     name: 'default',
@@ -60,7 +60,7 @@ vi.mock('../shared/utils/index.js', async (importOriginal) => ({
 }));
 
 vi.mock('../infra/config/index.js', () => ({
-  loadGlobalConfig: (...args: unknown[]) => mockLoadGlobalConfig(...args),
+  resolveConfigValue: (...args: unknown[]) => mockResolveConfigValue(...args),
   loadPieceByIdentifier: (...args: unknown[]) => mockLoadPieceByIdentifier(...args),
   getPieceDescription: (...args: unknown[]) => mockGetPieceDescription(...args),
 }));
@@ -126,7 +126,7 @@ beforeEach(() => {
   mockExistsSync.mockReturnValue(true);
 
   mockSelectPiece.mockResolvedValue('default');
-  mockLoadGlobalConfig.mockReturnValue({ defaultPiece: 'default' });
+  mockResolveConfigValue.mockReturnValue(3);
   mockLoadPieceByIdentifier.mockReturnValue(defaultPieceConfig);
   mockSelectOption.mockResolvedValue('plan');
   mockRunRetryMode.mockResolvedValue({ action: 'execute', task: '追加指示A' });
diff --git a/src/agents/runner.ts b/src/agents/runner.ts
index bb853c5..e71ac9a 100644
--- a/src/agents/runner.ts
+++ b/src/agents/runner.ts
@@ -4,7 +4,7 @@
 
 import { existsSync, readFileSync } from 'node:fs';
 import { basename, dirname } from 'node:path';
-import { loadCustomAgents, loadAgentPrompt, loadConfig } from '../infra/config/index.js';
+import { loadCustomAgents, loadAgentPrompt, resolveConfigValues } from '../infra/config/index.js';
 import { getProvider, type ProviderType, type ProviderCallOptions } from '../infra/providers/index.js';
 import type { AgentResponse, CustomAgentConfig } from '../core/models/index.js';
 import { createLogger } from '../shared/utils/index.js';
@@ -29,17 +29,10 @@ export class AgentRunner {
     agentConfig?: CustomAgentConfig,
   ): ProviderType {
     if (options?.provider) return options.provider;
-    const config = loadConfig(cwd);
-    const projectConfig = config.project;
-    if (projectConfig.provider) return projectConfig.provider;
+    const config = resolveConfigValues(cwd, ['provider']);
+    if (config.provider) return config.provider;
     if (options?.stepProvider) return options.stepProvider;
     if (agentConfig?.provider) return agentConfig.provider;
-    try {
-      const globalConfig = config.global;
-      if (globalConfig.provider) return globalConfig.provider;
-    } catch (error) {
-      log.debug('Global config not available for provider resolution', { error });
-    }
     return 'claude';
   }
 
@@ -57,14 +50,10 @@ export class AgentRunner {
     if (options?.stepModel) return options.stepModel;
     if (agentConfig?.model) return agentConfig.model;
     if (!options?.cwd) return undefined;
-    try {
-      const globalConfig = loadConfig(options.cwd).global;
-      if (globalConfig.model) {
-        const globalProvider = globalConfig.provider ?? 'claude';
-        if (globalProvider === resolvedProvider) return globalConfig.model;
-      }
-    } catch (error) {
-      log.debug('Global config not available for model resolution', { error });
+    const config = resolveConfigValues(options.cwd, ['provider', 'model']);
+    if (config.model) {
+      const defaultProvider = config.provider ?? 'claude';
+      if (defaultProvider === resolvedProvider) return config.model;
     }
     return undefined;
   }
@@ -133,7 +122,7 @@ export class AgentRunner {
       name: agentConfig.name,
       systemPrompt: agentConfig.claudeAgent || agentConfig.claudeSkill
         ? undefined
-        : loadAgentPrompt(agentConfig),
+        : loadAgentPrompt(agentConfig, options.cwd),
       claudeAgent: agentConfig.claudeAgent,
       claudeSkill: agentConfig.claudeSkill,
     });
diff --git a/src/app/cli/commands.ts b/src/app/cli/commands.ts
index 8f336b3..bb1e9a3 100644
--- a/src/app/cli/commands.ts
+++ b/src/app/cli/commands.ts
@@ -104,7 +104,7 @@ reset
   .command('categories')
   .description('Reset piece categories to builtin defaults')
   .action(async () => {
-    await resetCategoriesToDefault();
+    await resetCategoriesToDefault(resolvedCwd);
   });
 
 program
diff --git a/src/app/cli/program.ts b/src/app/cli/program.ts
index 7814cd1..507c470 100644
--- a/src/app/cli/program.ts
+++ b/src/app/cli/program.ts
@@ -11,7 +11,7 @@ import { resolve } from 'node:path';
 import {
   initGlobalDirs,
   initProjectDirs,
-  loadConfig,
+  resolveConfigValues,
   isVerboseMode,
 } from '../../infra/config/index.js';
 import { setQuietMode } from '../../shared/context.js';
@@ -69,7 +69,7 @@ export async function runPreActionHook(): Promise<void> {
   const verbose = isVerboseMode(resolvedCwd);
   initDebugLogger(verbose ? { enabled: true } : undefined, resolvedCwd);
 
-  const { global: config } = loadConfig(resolvedCwd);
+  const config = resolveConfigValues(resolvedCwd, ['logLevel', 'minimalOutput']);
 
   if (verbose) {
     setVerboseConsole(true);
diff --git a/src/app/cli/routing.ts b/src/app/cli/routing.ts
index 5d253a1..f6fbbd4 100644
--- a/src/app/cli/routing.ts
+++ b/src/app/cli/routing.ts
@@ -23,7 +23,7 @@ import {
   dispatchConversationAction,
   type InteractiveModeResult,
 } from '../../features/interactive/index.js';
-import { getPieceDescription, loadConfig } from '../../infra/config/index.js';
+import { getPieceDescription, resolveConfigValues } from '../../infra/config/index.js';
 import { DEFAULT_PIECE_NAME } from '../../shared/constants.js';
 import { program, resolvedCwd, pipelineMode } from './program.js';
 import { resolveAgentOverrides, parseCreateWorktreeOption, isDirectTask } from './helpers.js';
@@ -137,7 +137,7 @@ export async function executeDefaultAction(task?: string): Promise<void> {
   }
 
   // All paths below go through interactive mode
-  const { global: globalConfig } = loadConfig(resolvedCwd);
+  const globalConfig = resolveConfigValues(resolvedCwd, ['language', 'interactivePreviewMovements', 'provider']);
   const lang = resolveLanguage(globalConfig.language);
 
   const pieceId = await determinePiece(resolvedCwd, selectOptions.piece);
diff --git a/src/core/piece/engine/OptionsBuilder.ts b/src/core/piece/engine/OptionsBuilder.ts
index 12f5511..8f99282 100644
--- a/src/core/piece/engine/OptionsBuilder.ts
+++ b/src/core/piece/engine/OptionsBuilder.ts
@@ -56,9 +56,7 @@ export class OptionsBuilder {
 
     const resolvedProviderForPermissions =
       this.engineOptions.provider
-      ?? this.engineOptions.projectProvider
       ?? resolved.provider
-      ?? this.engineOptions.globalProvider
       ?? 'claude';
 
     return {
@@ -73,12 +71,11 @@ export class OptionsBuilder {
         movementName: step.name,
         requiredPermissionMode: step.requiredPermissionMode,
         provider: resolvedProviderForPermissions,
-        projectProviderProfiles: this.engineOptions.projectProviderProfiles,
-        globalProviderProfiles: this.engineOptions.globalProviderProfiles ?? DEFAULT_PROVIDER_PERMISSION_PROFILES,
+        projectProviderProfiles: this.engineOptions.providerProfiles,
+        globalProviderProfiles: DEFAULT_PROVIDER_PERMISSION_PROFILES,
       }),
       providerOptions: mergeProviderOptions(
-        this.engineOptions.globalProviderOptions,
-        this.engineOptions.projectProviderOptions,
+        this.engineOptions.providerOptions,
         step.providerOptions,
       ),
       language: this.getLanguage(),
diff --git a/src/core/piece/types.ts b/src/core/piece/types.ts
index ef8c014..f3ae155 100644
--- a/src/core/piece/types.ts
+++ b/src/core/piece/types.ts
@@ -179,21 +179,13 @@ export interface PieceEngineOptions {
   /** Language for instruction metadata. Defaults to 'en'. */
   language?: Language;
   provider?: ProviderType;
-  /** Project config provider (used for provider/profile resolution parity with AgentRunner) */
-  projectProvider?: ProviderType;
-  /** Global config provider (used for provider/profile resolution parity with AgentRunner) */
-  globalProvider?: ProviderType;
   model?: string;
-  /** Project-level provider options */
-  projectProviderOptions?: MovementProviderOptions;
-  /** Global-level provider options */
-  globalProviderOptions?: MovementProviderOptions;
+  /** Resolved provider options */
+  providerOptions?: MovementProviderOptions;
   /** Per-persona provider overrides (e.g., { coder: 'codex' }) */
   personaProviders?: Record<string, ProviderType>;
-  /** Project-level provider permission profiles */
-  projectProviderProfiles?: ProviderPermissionProfiles;
-  /** Global-level provider permission profiles */
-  globalProviderProfiles?: ProviderPermissionProfiles;
+  /** Resolved provider permission profiles */
+  providerProfiles?: ProviderPermissionProfiles;
   /** Enable interactive-only rules and user-input transitions */
   interactive?: boolean;
   /** Rule tag index detector (required for rules evaluation) */
diff --git a/src/features/catalog/catalogFacets.ts b/src/features/catalog/catalogFacets.ts
index 5a37a43..5f781c5 100644
--- a/src/features/catalog/catalogFacets.ts
+++ b/src/features/catalog/catalogFacets.ts
@@ -11,7 +11,7 @@ import chalk from 'chalk';
 import type { PieceSource } from '../../infra/config/loaders/pieceResolver.js';
 import { getLanguageResourcesDir } from '../../infra/resources/index.js';
 import { getGlobalConfigDir, getProjectConfigDir } from '../../infra/config/paths.js';
-import { getLanguage, getBuiltinPiecesEnabled } from '../../infra/config/global/globalConfig.js';
+import { resolveConfigValues } from '../../infra/config/index.js';
 import { section, error as logError, info } from '../../shared/ui/index.js';
 
 const FACET_TYPES = [
@@ -62,10 +62,11 @@ function getFacetDirs(
   facetType: FacetType,
   cwd: string,
 ): { dir: string; source: PieceSource }[] {
+  const config = resolveConfigValues(cwd, ['enableBuiltinPieces', 'language']);
   const dirs: { dir: string; source: PieceSource }[] = [];
 
-  if (getBuiltinPiecesEnabled()) {
-    const lang = getLanguage();
+  if (config.enableBuiltinPieces !== false) {
+    const lang = config.language;
     dirs.push({ dir: join(getLanguageResourcesDir(lang), facetType), source: 'builtin' });
   }
 
diff --git a/src/features/config/resetCategories.ts b/src/features/config/resetCategories.ts
index 369d9cf..ff3d494 100644
--- a/src/features/config/resetCategories.ts
+++ b/src/features/config/resetCategories.ts
@@ -5,12 +5,12 @@
 import { resetPieceCategories, getPieceCategoriesPath } from '../../infra/config/global/pieceCategories.js';
 import { header, success, info } from '../../shared/ui/index.js';
 
-export async function resetCategoriesToDefault(): Promise<void> {
+export async function resetCategoriesToDefault(cwd: string): Promise<void> {
   header('Reset Categories');
 
-  resetPieceCategories();
+  resetPieceCategories(cwd);
 
-  const userPath = getPieceCategoriesPath();
+  const userPath = getPieceCategoriesPath(cwd);
   success('User category overlay reset.');
   info(`  ${userPath}`);
 }
diff --git a/src/features/interactive/conversationLoop.ts b/src/features/interactive/conversationLoop.ts
index 5baf581..dd086c8 100644
--- a/src/features/interactive/conversationLoop.ts
+++ b/src/features/interactive/conversationLoop.ts
@@ -10,7 +10,7 @@
 
 import chalk from 'chalk';
 import {
-  loadConfig,
+  resolveConfigValues,
   loadPersonaSessions,
   updatePersonaSession,
   loadSessionState,
@@ -58,7 +58,7 @@ export interface SessionContext {
  * Initialize provider, session, and language for interactive conversation.
  */
 export function initializeSession(cwd: string, personaName: string): SessionContext {
-  const { global: globalConfig } = loadConfig(cwd);
+  const globalConfig = resolveConfigValues(cwd, ['language', 'provider', 'model']);
   const lang = resolveLanguage(globalConfig.language);
   if (!globalConfig.provider) {
     throw new Error('Provider is not configured.');
diff --git a/src/features/interactive/retryMode.ts b/src/features/interactive/retryMode.ts
index a3a66da..7f10f98 100644
--- a/src/features/interactive/retryMode.ts
+++ b/src/features/interactive/retryMode.ts
@@ -22,7 +22,7 @@ import {
 import { resolveLanguage } from './interactive.js';
 import { loadTemplate } from '../../shared/prompts/index.js';
 import { getLabelObject } from '../../shared/i18n/index.js';
-import { loadConfig } from '../../infra/config/index.js';
+import { resolveConfigValues } from '../../infra/config/index.js';
 import type { InstructModeResult, InstructUIText } from '../tasks/list/instructMode.js';
 
 /** Failure information for a retry task */
@@ -116,7 +116,7 @@ export async function runRetryMode(
   cwd: string,
   retryContext: RetryContext,
 ): Promise<InstructModeResult> {
-  const { global: globalConfig } = loadConfig(cwd);
+  const globalConfig = resolveConfigValues(cwd, ['language', 'provider']);
   const lang = resolveLanguage(globalConfig.language);
 
   if (!globalConfig.provider) {
diff --git a/src/features/pieceSelection/index.ts b/src/features/pieceSelection/index.ts
index 67cfa98..f90f85c 100644
--- a/src/features/pieceSelection/index.ts
+++ b/src/features/pieceSelection/index.ts
@@ -521,7 +521,7 @@ export async function selectPiece(
   options?: SelectPieceOptions,
 ): Promise<string | null> {
   const fallbackToDefault = options?.fallbackToDefault !== false;
-  const categoryConfig = getPieceCategories();
+  const categoryConfig = getPieceCategories(cwd);
   const currentPiece = getCurrentPiece(cwd);
 
   if (categoryConfig) {
@@ -534,7 +534,7 @@ export async function selectPiece(
       info('No pieces found.');
       return null;
     }
-    const categorized = buildCategorizedPieces(allPieces, categoryConfig);
+    const categorized = buildCategorizedPieces(allPieces, categoryConfig, cwd);
     warnMissingPieces(categorized.missingPieces.filter((missing) => missing.source === 'user'));
     return selectPieceFromCategorizedPieces(categorized, currentPiece);
   }
diff --git a/src/features/pipeline/execute.ts b/src/features/pipeline/execute.ts
index 0542a22..385e0f3 100644
--- a/src/features/pipeline/execute.ts
+++ b/src/features/pipeline/execute.ts
@@ -21,7 +21,7 @@ import {
 } from '../../infra/github/index.js';
 import { stageAndCommit, getCurrentBranch } from '../../infra/task/index.js';
 import { executeTask, type TaskExecutionOptions, type PipelineExecutionOptions } from '../tasks/index.js';
-import { loadConfig } from '../../infra/config/index.js';
+import { resolveConfigValues } from '../../infra/config/index.js';
 import { info, error, success, status, blankLine } from '../../shared/ui/index.js';
 import { createLogger, getErrorMessage } from '../../shared/utils/index.js';
 import type { PipelineConfig } from '../../core/models/index.js';
@@ -106,7 +106,7 @@ function buildPipelinePrBody(
  */
 export async function executePipeline(options: PipelineExecutionOptions): Promise<number> {
   const { cwd, piece, autoPr, skipGit } = options;
-  const { global: globalConfig } = loadConfig(cwd);
+  const globalConfig = resolveConfigValues(cwd, ['pipeline']);
   const pipelineConfig = globalConfig.pipeline;
   let issue: GitHubIssue | undefined;
   let task: string;
diff --git a/src/features/prompt/preview.ts b/src/features/prompt/preview.ts
index 5264262..9b540ba 100644
--- a/src/features/prompt/preview.ts
+++ b/src/features/prompt/preview.ts
@@ -5,7 +5,7 @@
  * Useful for debugging and understanding what prompts agents will receive.
  */
 
-import { loadPieceByIdentifier, getCurrentPiece, loadConfig } from '../../infra/config/index.js';
+import { loadPieceByIdentifier, getCurrentPiece, resolveConfigValue } from '../../infra/config/index.js';
 import { InstructionBuilder } from '../../core/piece/instruction/InstructionBuilder.js';
 import { ReportInstructionBuilder } from '../../core/piece/instruction/ReportInstructionBuilder.js';
 import { StatusJudgmentBuilder } from '../../core/piece/instruction/StatusJudgmentBuilder.js';
@@ -29,8 +29,7 @@ export async function previewPrompts(cwd: string, pieceIdentifier?: string): Pro
     return;
   }
 
-  const { global: globalConfig } = loadConfig(cwd);
-  const language: Language = globalConfig.language ?? 'en';
+  const language = resolveConfigValue(cwd, 'language') as Language;
 
   header(`Prompt Preview: ${config.name}`);
   info(`Movements: ${config.movements.length}`);
diff --git a/src/features/tasks/execute/pieceExecution.ts b/src/features/tasks/execute/pieceExecution.ts
index 584e4d4..bacbc07 100644
--- a/src/features/tasks/execute/pieceExecution.ts
+++ b/src/features/tasks/execute/pieceExecution.ts
@@ -17,7 +17,7 @@ import {
   updatePersonaSession,
   loadWorktreeSessions,
   updateWorktreeSession,
-  loadConfig,
+  resolveConfigValues,
   saveSessionState,
   type SessionState,
 } from '../../../infra/config/index.js';
@@ -317,7 +317,10 @@ export async function executePiece(
 
   // Load saved agent sessions only on retry; normal runs start with empty sessions
   const isWorktree = cwd !== projectCwd;
-  const { global: globalConfig } = loadConfig(projectCwd);
+  const globalConfig = resolveConfigValues(
+    projectCwd,
+    ['notificationSound', 'notificationSoundEvents', 'provider', 'runtime', 'preventSleep', 'model', 'observability'],
+  );
   const shouldNotify = globalConfig.notificationSound !== false;
   const notificationSoundEvents = globalConfig.notificationSoundEvents;
   const shouldNotifyIterationLimit = shouldNotify && notificationSoundEvents?.iterationLimit !== false;
@@ -443,14 +446,10 @@ export async function executePiece(
       projectCwd,
       language: options.language,
       provider: options.provider,
-      projectProvider: options.projectProvider,
-      globalProvider: options.globalProvider,
       model: options.model,
-      projectProviderOptions: options.projectProviderOptions,
-      globalProviderOptions: options.globalProviderOptions,
+      providerOptions: options.providerOptions,
       personaProviders: options.personaProviders,
-      projectProviderProfiles: options.projectProviderProfiles,
-      globalProviderProfiles: options.globalProviderProfiles,
+      providerProfiles: options.providerProfiles,
       interactive: interactiveUserInput,
       detectRuleIndex,
       callAiJudge,
diff --git a/src/features/tasks/execute/postExecution.ts b/src/features/tasks/execute/postExecution.ts
index 857d459..b29d18d 100644
--- a/src/features/tasks/execute/postExecution.ts
+++ b/src/features/tasks/execute/postExecution.ts
@@ -5,7 +5,7 @@
  * instructBranch (instruct mode from takt list).
  */
 
-import { loadConfig } from '../../../infra/config/index.js';
+import { resolveConfigValue } from '../../../infra/config/index.js';
 import { confirm } from '../../../shared/prompt/index.js';
 import { autoCommitAndPush } from '../../../infra/task/index.js';
 import { info, error, success } from '../../../shared/ui/index.js';
@@ -23,9 +23,9 @@ export async function resolveAutoPr(optionAutoPr: boolean | undefined, cwd: stri
     return optionAutoPr;
   }
 
-  const { global: globalConfig } = loadConfig(cwd);
-  if (typeof globalConfig.autoPr === 'boolean') {
-    return globalConfig.autoPr;
+  const autoPr = resolveConfigValue(cwd, 'autoPr');
+  if (typeof autoPr === 'boolean') {
+    return autoPr;
   }
 
   return confirm('Create pull request?', true);
diff --git a/src/features/tasks/execute/resolveTask.ts b/src/features/tasks/execute/resolveTask.ts
index e7d0c2e..799b7ce 100644
--- a/src/features/tasks/execute/resolveTask.ts
+++ b/src/features/tasks/execute/resolveTask.ts
@@ -4,7 +4,7 @@
 
 import * as fs from 'node:fs';
 import * as path from 'node:path';
-import { loadConfig } from '../../../infra/config/index.js';
+import { resolveConfigValue } from '../../../infra/config/index.js';
 import { type TaskInfo, createSharedClone, summarizeTaskName, getCurrentBranch } from '../../../infra/task/index.js';
 import { withProgress } from '../../../shared/ui/index.js';
 import { getTaskSlugFromTaskDir } from '../../../shared/utils/taskPaths.js';
@@ -141,8 +141,7 @@ export async function resolveTaskExecution(
   if (data.auto_pr !== undefined) {
     autoPr = data.auto_pr;
   } else {
-    const { global: globalConfig } = loadConfig(defaultCwd);
-    autoPr = globalConfig.autoPr ?? false;
+    autoPr = resolveConfigValue(defaultCwd, 'autoPr') ?? false;
   }
 
   return {
diff --git a/src/features/tasks/execute/session.ts b/src/features/tasks/execute/session.ts
index 9303f65..d762978 100644
--- a/src/features/tasks/execute/session.ts
+++ b/src/features/tasks/execute/session.ts
@@ -2,7 +2,7 @@
  * Session management helpers for agent execution
  */
 
-import { loadPersonaSessions, updatePersonaSession, loadConfig } from '../../../infra/config/index.js';
+import { loadPersonaSessions, updatePersonaSession, resolveConfigValue } from '../../../infra/config/index.js';
 import type { AgentResponse } from '../../../core/models/index.js';
 
 /**
@@ -15,7 +15,7 @@ export async function withPersonaSession(
   fn: (sessionId?: string) => Promise<AgentResponse>,
   provider?: string
 ): Promise<AgentResponse> {
-  const resolvedProvider = provider ?? loadConfig(cwd).global.provider ?? 'claude';
+  const resolvedProvider = provider ?? resolveConfigValue(cwd, 'provider') ?? 'claude';
   const sessions = loadPersonaSessions(cwd, resolvedProvider);
   const sessionId = sessions[personaName];
 
diff --git a/src/features/tasks/execute/taskExecution.ts b/src/features/tasks/execute/taskExecution.ts
index a556fed..79ba68f 100644
--- a/src/features/tasks/execute/taskExecution.ts
+++ b/src/features/tasks/execute/taskExecution.ts
@@ -2,7 +2,7 @@
  * Task execution logic
  */
 
-import { loadPieceByIdentifier, isPiecePath, loadConfig } from '../../../infra/config/index.js';
+import { loadPieceByIdentifier, isPiecePath, resolveConfigValues } from '../../../infra/config/index.js';
 import { TaskRunner, type TaskInfo } from '../../../infra/task/index.js';
 import {
   header,
@@ -86,21 +86,22 @@ async function executeTaskWithResult(options: ExecuteTaskOptions): Promise<Piece
     movements: pieceConfig.movements.map((s: { name: string }) => s.name),
   });
 
-  const config = loadConfig(projectCwd);
-  const globalConfig = config.global;
-  const projectConfig = config.project;
+  const config = resolveConfigValues(projectCwd, [
+    'language',
+    'provider',
+    'model',
+    'providerOptions',
+    'personaProviders',
+    'providerProfiles',
+  ]);
   return await executePiece(pieceConfig, task, cwd, {
     projectCwd,
-    language: globalConfig.language,
-    provider: agentOverrides?.provider,
-    projectProvider: projectConfig.provider,
-    globalProvider: globalConfig.provider,
-    model: agentOverrides?.model,
-    projectProviderOptions: projectConfig.providerOptions,
-    globalProviderOptions: globalConfig.providerOptions,
-    personaProviders: globalConfig.personaProviders,
-    projectProviderProfiles: projectConfig.providerProfiles,
-    globalProviderProfiles: globalConfig.providerProfiles,
+    language: config.language,
+    provider: agentOverrides?.provider ?? config.provider,
+    model: agentOverrides?.model ?? config.model,
+    providerOptions: config.providerOptions,
+    personaProviders: config.personaProviders,
+    providerProfiles: config.providerProfiles,
     interactiveUserInput,
     interactiveMetadata,
     startMovement,
@@ -237,7 +238,10 @@ export async function runAllTasks(
   options?: TaskExecutionOptions,
 ): Promise<void> {
   const taskRunner = new TaskRunner(cwd);
-  const { global: globalConfig } = loadConfig(cwd);
+  const globalConfig = resolveConfigValues(
+    cwd,
+    ['notificationSound', 'notificationSoundEvents', 'concurrency', 'taskPollIntervalMs'],
+  );
   const shouldNotifyRunComplete = globalConfig.notificationSound !== false
     && globalConfig.notificationSoundEvents?.runComplete !== false;
   const shouldNotifyRunAbort = globalConfig.notificationSound !== false
diff --git a/src/features/tasks/execute/types.ts b/src/features/tasks/execute/types.ts
index 7fd2f06..30f07de 100644
--- a/src/features/tasks/execute/types.ts
+++ b/src/features/tasks/execute/types.ts
@@ -33,21 +33,13 @@ export interface PieceExecutionOptions {
   /** Language for instruction metadata */
   language?: Language;
   provider?: ProviderType;
-  /** Project config provider */
-  projectProvider?: ProviderType;
-  /** Global config provider */
-  globalProvider?: ProviderType;
   model?: string;
-  /** Project-level provider options */
-  projectProviderOptions?: MovementProviderOptions;
-  /** Global-level provider options */
-  globalProviderOptions?: MovementProviderOptions;
+  /** Resolved provider options */
+  providerOptions?: MovementProviderOptions;
   /** Per-persona provider overrides (e.g., { coder: 'codex' }) */
   personaProviders?: Record<string, ProviderType>;
-  /** Project-level provider permission profiles */
-  projectProviderProfiles?: ProviderPermissionProfiles;
-  /** Global-level provider permission profiles */
-  globalProviderProfiles?: ProviderPermissionProfiles;
+  /** Resolved provider permission profiles */
+  providerProfiles?: ProviderPermissionProfiles;
   /** Enable interactive user input during step transitions */
   interactiveUserInput?: boolean;
   /** Interactive mode result metadata for NDJSON logging */
diff --git a/src/features/tasks/list/instructMode.ts b/src/features/tasks/list/instructMode.ts
index 5bb0f5a..1bd3476 100644
--- a/src/features/tasks/list/instructMode.ts
+++ b/src/features/tasks/list/instructMode.ts
@@ -23,7 +23,7 @@ import {
 import { type RunSessionContext, formatRunSessionForPrompt } from '../../interactive/runSessionReader.js';
 import { loadTemplate } from '../../../shared/prompts/index.js';
 import { getLabelObject } from '../../../shared/i18n/index.js';
-import { loadConfig } from '../../../infra/config/index.js';
+import { resolveConfigValues } from '../../../infra/config/index.js';
 
 export type InstructModeAction = 'execute' | 'save_task' | 'cancel';
 
@@ -109,7 +109,7 @@ export async function runInstructMode(
   pieceContext?: PieceContext,
   runSessionContext?: RunSessionContext,
 ): Promise<InstructModeResult> {
-  const { global: globalConfig } = loadConfig(cwd);
+  const globalConfig = resolveConfigValues(cwd, ['language', 'provider']);
   const lang = resolveLanguage(globalConfig.language);
 
   if (!globalConfig.provider) {
diff --git a/src/features/tasks/list/taskInstructionActions.ts b/src/features/tasks/list/taskInstructionActions.ts
index b520bc6..b2d3668 100644
--- a/src/features/tasks/list/taskInstructionActions.ts
+++ b/src/features/tasks/list/taskInstructionActions.ts
@@ -11,7 +11,7 @@ import {
   TaskRunner,
   detectDefaultBranch,
 } from '../../../infra/task/index.js';
-import { loadConfig, getPieceDescription } from '../../../infra/config/index.js';
+import { resolveConfigValues, getPieceDescription } from '../../../infra/config/index.js';
 import { info, error as logError } from '../../../shared/ui/index.js';
 import { createLogger, getErrorMessage } from '../../../shared/utils/index.js';
 import { runInstructMode } from './instructMode.js';
@@ -93,7 +93,7 @@ export async function instructBranch(
     return false;
   }
 
-  const { global: globalConfig } = loadConfig(projectDir);
+  const globalConfig = resolveConfigValues(projectDir, ['interactivePreviewMovements', 'language']);
   const pieceDesc = getPieceDescription(selectedPiece, projectDir, globalConfig.interactivePreviewMovements);
   const pieceContext: PieceContext = {
     name: pieceDesc.name,
diff --git a/src/features/tasks/list/taskRetryActions.ts b/src/features/tasks/list/taskRetryActions.ts
index 9f36876..2a68bd5 100644
--- a/src/features/tasks/list/taskRetryActions.ts
+++ b/src/features/tasks/list/taskRetryActions.ts
@@ -8,7 +8,7 @@
 import * as fs from 'node:fs';
 import type { TaskListItem } from '../../../infra/task/index.js';
 import { TaskRunner } from '../../../infra/task/index.js';
-import { loadPieceByIdentifier, loadConfig, getPieceDescription } from '../../../infra/config/index.js';
+import { loadPieceByIdentifier, resolveConfigValue, getPieceDescription } from '../../../infra/config/index.js';
 import { selectPiece } from '../../pieceSelection/index.js';
 import { selectOption } from '../../../shared/prompt/index.js';
 import { info, header, blankLine, status } from '../../../shared/ui/index.js';
@@ -133,7 +133,7 @@ export async function retryFailedTask(
     return false;
   }
 
-  const { global: globalConfig } = loadConfig(projectDir);
+  const previewCount = resolveConfigValue(projectDir, 'interactivePreviewMovements');
   const pieceConfig = loadPieceByIdentifier(selectedPiece, projectDir);
 
   if (!pieceConfig) {
@@ -145,7 +145,7 @@ export async function retryFailedTask(
     return false;
   }
 
-  const pieceDesc = getPieceDescription(selectedPiece, projectDir, globalConfig.interactivePreviewMovements);
+  const pieceDesc = getPieceDescription(selectedPiece, projectDir, previewCount);
   const pieceContext = {
     name: pieceDesc.name,
     description: pieceDesc.description,
diff --git a/src/infra/config/global/pieceCategories.ts b/src/infra/config/global/pieceCategories.ts
index b189ab1..b0e50e1 100644
--- a/src/infra/config/global/pieceCategories.ts
+++ b/src/infra/config/global/pieceCategories.ts
@@ -7,7 +7,7 @@
 import { existsSync, mkdirSync, writeFileSync } from 'node:fs';
 import { dirname, join } from 'node:path';
 import { getGlobalConfigDir } from '../paths.js';
-import { loadGlobalConfig } from './globalConfig.js';
+import { loadConfig } from '../loadConfig.js';
 
 const INITIAL_USER_CATEGORIES_CONTENT = 'piece_categories: {}\n';
 
@@ -16,8 +16,8 @@ function getDefaultPieceCategoriesPath(): string {
 }
 
 /** Get the path to the user's piece categories file. */
-export function getPieceCategoriesPath(): string {
-  const config = loadGlobalConfig();
+export function getPieceCategoriesPath(cwd: string): string {
+  const config = loadConfig(cwd);
   if (config.pieceCategoriesFile) {
     return config.pieceCategoriesFile;
   }
@@ -27,8 +27,8 @@ export function getPieceCategoriesPath(): string {
 /**
  * Reset user categories overlay file to initial content.
  */
-export function resetPieceCategories(): void {
-  const userPath = getPieceCategoriesPath();
+export function resetPieceCategories(cwd: string): void {
+  const userPath = getPieceCategoriesPath(cwd);
   const dir = dirname(userPath);
   if (!existsSync(dir)) {
     mkdirSync(dir, { recursive: true });
diff --git a/src/infra/config/index.ts b/src/infra/config/index.ts
index 0045bfe..585a844 100644
--- a/src/infra/config/index.ts
+++ b/src/infra/config/index.ts
@@ -6,4 +6,4 @@ export * from './paths.js';
 export * from './loaders/index.js';
 export * from './global/index.js';
 export * from './project/index.js';
-export * from './loadConfig.js';
+export * from './resolveConfigValue.js';
diff --git a/src/infra/config/loadConfig.ts b/src/infra/config/loadConfig.ts
index 85edeff..088b540 100644
--- a/src/infra/config/loadConfig.ts
+++ b/src/infra/config/loadConfig.ts
@@ -1,16 +1,108 @@
 import type { GlobalConfig } from '../../core/models/index.js';
-import type { ProjectLocalConfig } from './project/projectConfig.js';
+import type { MovementProviderOptions } from '../../core/models/piece-types.js';
+import type { ProviderPermissionProfiles } from '../../core/models/provider-profiles.js';
 import { loadGlobalConfig } from './global/globalConfig.js';
 import { loadProjectConfig } from './project/projectConfig.js';
+import { envVarNameFromPath } from './env/config-env-overrides.js';
 
-export interface LoadedConfig {
-  global: GlobalConfig;
-  project: ProjectLocalConfig;
+export interface LoadedConfig extends GlobalConfig {
+  piece: string;
+  verbose: boolean;
+  providerOptions?: MovementProviderOptions;
+  providerProfiles?: ProviderPermissionProfiles;
 }
 
 export function loadConfig(projectDir: string): LoadedConfig {
+  const global = loadGlobalConfig();
+  const project = loadProjectConfig(projectDir);
+  const provider = project.provider ?? global.provider;
+
   return {
-    global: loadGlobalConfig(),
-    project: loadProjectConfig(projectDir),
+    ...global,
+    piece: project.piece ?? 'default',
+    provider,
+    model: resolveModel(global, provider),
+    verbose: resolveVerbose(project.verbose, global.verbose),
+    providerOptions: mergeProviderOptions(global.providerOptions, project.providerOptions),
+    providerProfiles: mergeProviderProfiles(global.providerProfiles, project.providerProfiles),
   };
 }
+
+function resolveModel(global: GlobalConfig, provider: GlobalConfig['provider']): string | undefined {
+  if (!global.model) return undefined;
+  const globalProvider = global.provider ?? 'claude';
+  const resolvedProvider = provider ?? 'claude';
+  if (globalProvider !== resolvedProvider) return undefined;
+  return global.model;
+}
+
+function resolveVerbose(projectVerbose: boolean | undefined, globalVerbose: boolean | undefined): boolean {
+  const envVerbose = loadEnvBooleanSetting('verbose');
+  if (envVerbose !== undefined) return envVerbose;
+  if (projectVerbose !== undefined) return projectVerbose;
+  if (globalVerbose !== undefined) return globalVerbose;
+  return false;
+}
+
+function loadEnvBooleanSetting(configKey: string): boolean | undefined {
+  const envKey = envVarNameFromPath(configKey);
+  const raw = process.env[envKey];
+  if (raw === undefined) return undefined;
+
+  const normalized = raw.trim().toLowerCase();
+  if (normalized === 'true') return true;
+  if (normalized === 'false') return false;
+
+  throw new Error(`${envKey} must be one of: true, false`);
+}
+
+function mergeProviderOptions(
+  globalOptions: MovementProviderOptions | undefined,
+  projectOptions: MovementProviderOptions | undefined,
+): MovementProviderOptions | undefined {
+  if (!globalOptions && !projectOptions) return undefined;
+
+  const result: MovementProviderOptions = {};
+  if (globalOptions?.codex || projectOptions?.codex) {
+    result.codex = { ...globalOptions?.codex, ...projectOptions?.codex };
+  }
+  if (globalOptions?.opencode || projectOptions?.opencode) {
+    result.opencode = { ...globalOptions?.opencode, ...projectOptions?.opencode };
+  }
+  if (globalOptions?.claude?.sandbox || projectOptions?.claude?.sandbox) {
+    result.claude = {
+      sandbox: {
+        ...globalOptions?.claude?.sandbox,
+        ...projectOptions?.claude?.sandbox,
+      },
+    };
+  }
+
+  return Object.keys(result).length > 0 ? result : undefined;
+}
+
+function mergeProviderProfiles(
+  globalProfiles: ProviderPermissionProfiles | undefined,
+  projectProfiles: ProviderPermissionProfiles | undefined,
+): ProviderPermissionProfiles | undefined {
+  if (!globalProfiles && !projectProfiles) return undefined;
+
+  const merged: ProviderPermissionProfiles = { ...(globalProfiles ?? {}) };
+  for (const [provider, profile] of Object.entries(projectProfiles ?? {})) {
+    const key = provider as keyof ProviderPermissionProfiles;
+    const existing = merged[key];
+    if (!existing) {
+      merged[key] = profile;
+      continue;
+    }
+    merged[key] = {
+      defaultPermissionMode: profile.defaultPermissionMode,
+      movementPermissionOverrides: {
+        ...(existing.movementPermissionOverrides ?? {}),
+        ...(profile.movementPermissionOverrides ?? {}),
+      },
+    };
+  }
+
+  return Object.keys(merged).length > 0 ? merged : undefined;
+}
diff --git a/src/infra/config/loaders/agentLoader.ts b/src/infra/config/loaders/agentLoader.ts
index 483d690..8af69cf 100644
--- a/src/infra/config/loaders/agentLoader.ts
+++ b/src/infra/config/loaders/agentLoader.ts
@@ -16,11 +16,11 @@ import {
   getBuiltinPiecesDir,
   isPathSafe,
 } from '../paths.js';
-import { getLanguage } from '../global/globalConfig.js';
+import { loadConfig } from '../loadConfig.js';
 
 /** Get all allowed base directories for persona prompt files */
-function getAllowedPromptBases(): string[] {
-  const lang = getLanguage();
+function getAllowedPromptBases(cwd: string): string[] {
+  const lang = loadConfig(cwd).language;
   return [
     getGlobalPersonasDir(),
     getGlobalPiecesDir(),
@@ -63,14 +63,14 @@ export function listCustomAgents(): string[] {
 }
 
 /** Load agent prompt content. */
-export function loadAgentPrompt(agent: CustomAgentConfig): string {
+export function loadAgentPrompt(agent: CustomAgentConfig, cwd: string): string {
   if (agent.prompt) {
     return agent.prompt;
   }
 
   if (agent.promptFile) {
     const promptFile = agent.promptFile;
-    const isValid = getAllowedPromptBases().some((base) => isPathSafe(base, promptFile));
+    const isValid = getAllowedPromptBases(cwd).some((base) => isPathSafe(base, promptFile));
     if (!isValid) {
       throw new Error(`Agent prompt file path is not allowed: ${agent.promptFile}`);
     }
@@ -86,8 +86,8 @@ export function loadAgentPrompt(agent: CustomAgentConfig): string {
 }
 
 /** Load persona prompt from a resolved path. */
-export function loadPersonaPromptFromPath(personaPath: string): string {
-  const isValid = getAllowedPromptBases().some((base) => isPathSafe(base, personaPath));
+export function loadPersonaPromptFromPath(personaPath: string, cwd: string): string {
+  const isValid = getAllowedPromptBases(cwd).some((base) => isPathSafe(base, personaPath));
   if (!isValid) {
     throw new Error(`Persona prompt file path is not allowed: ${personaPath}`);
   }
diff --git a/src/infra/config/loaders/pieceCategories.ts b/src/infra/config/loaders/pieceCategories.ts
index 6bbd64b..135cdc3 100644
--- a/src/infra/config/loaders/pieceCategories.ts
+++ b/src/infra/config/loaders/pieceCategories.ts
@@ -10,10 +10,10 @@ import { existsSync, readFileSync } from 'node:fs';
 import { join } from 'node:path';
 import { parse as parseYaml } from 'yaml';
 import { z } from 'zod/v4';
-import { getLanguage, getBuiltinPiecesEnabled, getDisabledBuiltins } from '../global/globalConfig.js';
 import { getPieceCategoriesPath } from '../global/pieceCategories.js';
 import { getLanguageResourcesDir } from '../../resources/index.js';
 import { listBuiltinPieceNames } from './pieceResolver.js';
+import { loadConfig } from '../loadConfig.js';
 import type { PieceWithSource } from './pieceResolver.js';
 
 const CategoryConfigSchema = z.object({
@@ -232,8 +232,8 @@ function resolveOthersCategoryName(defaultConfig: ParsedCategoryConfig, userConf
  * Load default categories from builtin resource file.
  * Returns null if file doesn't exist or has no piece_categories.
  */
-export function loadDefaultCategories(): CategoryConfig | null {
-  const lang = getLanguage();
+export function loadDefaultCategories(cwd: string): CategoryConfig | null {
+  const lang = loadConfig(cwd).language;
   const filePath = join(getLanguageResourcesDir(lang), 'piece-categories.yaml');
   const parsed = loadCategoryConfigFromPath(filePath, filePath);
 
@@ -255,8 +255,8 @@ export function loadDefaultCategories(): CategoryConfig | null {
 }
 
 /** Get the path to the builtin default categories file. */
-export function getDefaultCategoriesPath(): string {
-  const lang = getLanguage();
+export function getDefaultCategoriesPath(cwd: string): string {
+  const lang = loadConfig(cwd).language;
   return join(getLanguageResourcesDir(lang), 'piece-categories.yaml');
 }
 
@@ -264,14 +264,14 @@ export function getDefaultCategoriesPath(): string {
  * Get effective piece categories configuration.
  * Built from builtin categories and optional user overlay.
  */
-export function getPieceCategories(): CategoryConfig | null {
-  const defaultPath = getDefaultCategoriesPath();
+export function getPieceCategories(cwd: string): CategoryConfig | null {
+  const defaultPath = getDefaultCategoriesPath(cwd);
   const defaultConfig = loadCategoryConfigFromPath(defaultPath, defaultPath);
   if (!defaultConfig?.pieceCategories) {
     return null;
   }
 
-  const userPath = getPieceCategoriesPath();
+  const userPath = getPieceCategoriesPath(cwd);
   const userConfig = loadCategoryConfigFromPath(userPath, userPath);
 
   const merged = userConfig?.pieceCategories
@@ -376,14 +376,16 @@ function appendOthersCategory(
 export function buildCategorizedPieces(
   allPieces: Map<string, PieceWithSource>,
   config: CategoryConfig,
+  cwd: string,
 ): CategorizedPieces {
+  const globalConfig = loadConfig(cwd);
   const ignoreMissing = new Set<string>();
-  if (!getBuiltinPiecesEnabled()) {
-    for (const name of listBuiltinPieceNames({ includeDisabled: true })) {
+  if (globalConfig.enableBuiltinPieces === false) {
+    for (const name of listBuiltinPieceNames(cwd, { includeDisabled: true })) {
       ignoreMissing.add(name);
     }
   } else {
-    for (const name of getDisabledBuiltins()) {
+    for (const name of (globalConfig.disabledBuiltins ?? [])) {
       ignoreMissing.add(name);
     }
   }
diff --git a/src/infra/config/loaders/pieceParser.ts b/src/infra/config/loaders/pieceParser.ts
index cf39b40..12cfdbf 100644
--- a/src/infra/config/loaders/pieceParser.ts
+++ b/src/infra/config/loaders/pieceParser.ts
@@ -11,7 +11,7 @@ import { parse as parseYaml } from 'yaml';
 import type { z } from 'zod';
 import { PieceConfigRawSchema, PieceMovementRawSchema } from '../../../core/models/index.js';
 import type { PieceConfig, PieceMovement, PieceRule, OutputContractEntry, OutputContractItem, LoopMonitorConfig, LoopMonitorJudge, ArpeggioMovementConfig, ArpeggioMergeMovementConfig, TeamLeaderConfig } from '../../../core/models/index.js';
-import { getLanguage } from '../global/globalConfig.js';
+import { loadConfig } from '../loadConfig.js';
 import {
   type PieceSections,
   type FacetResolutionContext,
@@ -428,9 +428,9 @@ export function normalizePieceConfig(
 /**
  * Load a piece from a YAML file.
  * @param filePath Path to the piece YAML file
- * @param projectDir Optional project directory for 3-layer facet resolution
+ * @param projectDir Project directory for 3-layer facet resolution
  */
-export function loadPieceFromFile(filePath: string, projectDir?: string): PieceConfig {
+export function loadPieceFromFile(filePath: string, projectDir: string): PieceConfig {
   if (!existsSync(filePath)) {
     throw new Error(`Piece file not found: ${filePath}`);
   }
@@ -439,7 +439,7 @@ export function loadPieceFromFile(filePath: string, projectDir?: string): PieceC
   const pieceDir = dirname(filePath);
 
   const context: FacetResolutionContext = {
-    lang: getLanguage(),
+    lang: loadConfig(projectDir).language,
     projectDir,
   };
 
diff --git a/src/infra/config/loaders/pieceResolver.ts b/src/infra/config/loaders/pieceResolver.ts
index 7a60f9d..fa4059f 100644
--- a/src/infra/config/loaders/pieceResolver.ts
+++ b/src/infra/config/loaders/pieceResolver.ts
@@ -10,7 +10,7 @@ import { join, resolve, isAbsolute } from 'node:path';
 import { homedir } from 'node:os';
 import type { PieceConfig, PieceMovement, InteractiveMode } from '../../../core/models/index.js';
 import { getGlobalPiecesDir, getBuiltinPiecesDir, getProjectConfigDir } from '../paths.js';
-import { getLanguage, getDisabledBuiltins, getBuiltinPiecesEnabled } from '../global/globalConfig.js';
+import { loadConfig } from '../loadConfig.js';
 import { createLogger, getErrorMessage } from '../../../shared/utils/index.js';
 import { loadPieceFromFile } from './pieceParser.js';
 
@@ -23,10 +23,11 @@ export interface PieceWithSource {
   source: PieceSource;
 }
 
-export function listBuiltinPieceNames(options?: { includeDisabled?: boolean }): string[] {
-  const lang = getLanguage();
+export function listBuiltinPieceNames(cwd: string, options?: { includeDisabled?: boolean }): string[] {
+  const config = loadConfig(cwd);
+  const lang = config.language;
   const dir = getBuiltinPiecesDir(lang);
-  const disabled = options?.includeDisabled ? undefined : getDisabledBuiltins();
+  const disabled = options?.includeDisabled ? undefined : (config.disabledBuiltins ?? []);
   const names = new Set<string>();
   for (const entry of iteratePieceDir(dir, 'builtin', disabled)) {
     names.add(entry.name);
@@ -35,10 +36,11 @@ export function listBuiltinPieceNames(options?: { includeDisabled?: boolean }):
 }
 
 /** Get builtin piece by name */
-export function getBuiltinPiece(name: string, projectCwd?: string): PieceConfig | null {
-  if (!getBuiltinPiecesEnabled()) return null;
-  const lang = getLanguage();
-  const disabled = getDisabledBuiltins();
+export function getBuiltinPiece(name: string, projectCwd: string): PieceConfig | null {
+  const config = loadConfig(projectCwd);
+  if (config.enableBuiltinPieces === false) return null;
+  const lang = config.language;
+  const disabled = config.disabledBuiltins ?? [];
   if (disabled.includes(name)) return null;
 
   const builtinDir = getBuiltinPiecesDir(lang);
@@ -69,7 +71,7 @@ function resolvePath(pathInput: string, basePath: string): string {
 function loadPieceFromPath(
   filePath: string,
   basePath: string,
-  projectCwd?: string,
+  projectCwd: string,
 ): PieceConfig | null {
   const resolvedPath = resolvePath(filePath, basePath);
   if (!existsSync(resolvedPath)) {
@@ -371,10 +373,11 @@ function* iteratePieceDir(
 
 /** Get the 3-layer directory list (builtin → user → project-local) */
 function getPieceDirs(cwd: string): { dir: string; source: PieceSource; disabled?: string[] }[] {
-  const disabled = getDisabledBuiltins();
-  const lang = getLanguage();
+  const config = loadConfig(cwd);
+  const disabled = config.disabledBuiltins ?? [];
+  const lang = config.language;
   const dirs: { dir: string; source: PieceSource; disabled?: string[] }[] = [];
-  if (getBuiltinPiecesEnabled()) {
+  if (config.enableBuiltinPieces !== false) {
     dirs.push({ dir: getBuiltinPiecesDir(lang), disabled, source: 'builtin' });
   }
   dirs.push({ dir: getGlobalPiecesDir(), source: 'user' });
diff --git a/src/infra/config/project/resolvedSettings.ts b/src/infra/config/project/resolvedSettings.ts
index f67fc71..e514c5d 100644
--- a/src/infra/config/project/resolvedSettings.ts
+++ b/src/infra/config/project/resolvedSettings.ts
@@ -27,6 +27,6 @@ function loadEnvBooleanSetting(configKey: string): boolean | undefined {
 
 export function isVerboseMode(projectDir: string): boolean {
   const envValue = loadEnvBooleanSetting('verbose');
-  const { project, global } = loadConfig(projectDir);
-  return resolveValue(envValue, project.verbose, global.verbose, false);
+  const config = loadConfig(projectDir);
+  return resolveValue(envValue, undefined, config.verbose, false);
 }
diff --git a/src/infra/config/resolveConfigValue.ts b/src/infra/config/resolveConfigValue.ts
new file mode 100644
index 0000000..8f7d4f9
--- /dev/null
+++ b/src/infra/config/resolveConfigValue.ts
@@ -0,0 +1,22 @@
+import { loadConfig, type LoadedConfig } from './loadConfig.js';
+
+export type ConfigParameterKey = keyof LoadedConfig;
+
+export function resolveConfigValue<K extends ConfigParameterKey>(
+  projectDir: string,
+  key: K,
+): LoadedConfig[K] {
+  return loadConfig(projectDir)[key];
+}
+
+export function resolveConfigValues<K extends ConfigParameterKey>(
+  projectDir: string,
+  keys: readonly K[],
+): Pick<LoadedConfig, K> {
+  const config = loadConfig(projectDir);
+  const result = {} as Pick<LoadedConfig, K>;
+  for (const key of keys) {
+    result[key] = config[key];
+  }
+  return result;
+}
diff --git a/src/infra/task/clone.ts b/src/infra/task/clone.ts
index e1dd846..a8cd649 100644
--- a/src/infra/task/clone.ts
+++ b/src/infra/task/clone.ts
@@ -11,7 +11,7 @@ import * as fs from 'node:fs';
 import * as path from 'node:path';
 import { execFileSync } from 'node:child_process';
 import { createLogger, slugify } from '../../shared/utils/index.js';
-import { loadConfig } from '../config/index.js';
+import { resolveConfigValue } from '../config/index.js';
 import type { WorktreeOptions, WorktreeResult } from './types.js';
 
 export type { WorktreeOptions, WorktreeResult };
@@ -36,11 +36,11 @@ export class CloneManager {
    * Returns the configured worktree_dir (resolved to absolute), or ../
    */
   private static resolveCloneBaseDir(projectDir: string): string {
-    const { global: globalConfig } = loadConfig(projectDir);
-    if (globalConfig.worktreeDir) {
-      return path.isAbsolute(globalConfig.worktreeDir)
-        ? globalConfig.worktreeDir
-        : path.resolve(projectDir, globalConfig.worktreeDir);
+    const worktreeDir = resolveConfigValue(projectDir, 'worktreeDir');
+    if (worktreeDir) {
+      return path.isAbsolute(worktreeDir)
+        ? worktreeDir
+        : path.resolve(projectDir, worktreeDir);
     }
     return path.join(projectDir, '..', 'takt-worktree');
   }
diff --git a/src/infra/task/summarize.ts b/src/infra/task/summarize.ts
index 3da5547..4a6913d 100644
--- a/src/infra/task/summarize.ts
+++ b/src/infra/task/summarize.ts
@@ -5,7 +5,7 @@
  */
 
 import * as wanakana from 'wanakana';
-import { loadConfig } from '../config/index.js';
+import { resolveConfigValues } from '../config/index.js';
 import { getProvider, type ProviderType } from '../providers/index.js';
 import { createLogger } from '../../shared/utils/index.js';
 import { loadTemplate } from '../../shared/prompts/index.js';
@@ -53,7 +53,7 @@ export class TaskSummarizer {
     taskName: string,
     options: SummarizeOptions,
   ): Promise<string> {
-    const { global: globalConfig } = loadConfig(options.cwd);
+    const globalConfig = resolveConfigValues(options.cwd, ['branchNameStrategy', 'provider', 'model']);
     const useLLM = options.useLLM ?? (globalConfig.branchNameStrategy === 'ai');
     log.info('Summarizing task name', { taskName, useLLM });