diff --git a/docs/testing/e2e.md b/docs/testing/e2e.md
index cc996b3..b536ab0 100644
--- a/docs/testing/e2e.md
+++ b/docs/testing/e2e.md
@@ -17,7 +17,8 @@ E2Eテストを追加・変更した場合は、このドキュメントも更
 ## E2E用config.yaml
 - E2Eのグローバル設定は `e2e/fixtures/config.e2e.yaml` を基準に生成する。
 - `createIsolatedEnv()` は毎回一時ディレクトリ配下（`$TAKT_CONFIG_DIR/config.yaml`）にこの基準設定を書き出す。
-- 通知音は `notification_sound_events` でタイミング別に制御し、E2E既定では道中（`iteration_limit` / `piece_complete` / `piece_abort`）をOFF、全体終了時（`run_complete` / `run_abort`）のみONにする。
+- E2E実行中の `takt` 内通知音は `notification_sound: false` で無効化する。
+- `npm run test:e2e` は成否にかかわらず最後に1回ベルを鳴らし、終了コードはテスト結果を維持する。
 - 各スペックで `provider` や `concurrency` を変更する場合は、`updateIsolatedConfig()` を使って差分のみ上書きする。
 - `~/.takt/config.yaml` はE2Eでは参照されないため、通常実行の設定には影響しない。
 
diff --git a/e2e/fixtures/config.e2e.yaml b/e2e/fixtures/config.e2e.yaml
index 6eea1b8..fca15ce 100644
--- a/e2e/fixtures/config.e2e.yaml
+++ b/e2e/fixtures/config.e2e.yaml
@@ -2,10 +2,10 @@ provider: claude
 language: en
 log_level: info
 default_piece: default
-notification_sound: true
+notification_sound: false
 notification_sound_events:
   iteration_limit: false
   piece_complete: false
   piece_abort: false
   run_complete: true
-  run_abort: true
+  run_abort: false
diff --git a/e2e/fixtures/scenarios/cycle-detect-abort.json b/e2e/fixtures/scenarios/cycle-detect-abort.json
index 0f130f0..c4d6b1a 100644
--- a/e2e/fixtures/scenarios/cycle-detect-abort.json
+++ b/e2e/fixtures/scenarios/cycle-detect-abort.json
@@ -1,10 +1,13 @@
 [
   {"persona": "agents/test-reviewer-a", "status": "done", "content": "[REVIEW:2]\n\nNeeds fix."},
   {"persona": "conductor", "status": "done", "content": "[REVIEW:2]"},
+  {"persona": "conductor", "status": "done", "content": "[REVIEW:2]"},
   {"persona": "agents/test-coder", "status": "done", "content": "[FIX:1]\n\nFixed."},
   {"persona": "agents/test-reviewer-a", "status": "done", "content": "[REVIEW:2]\n\nStill needs fix."},
   {"persona": "conductor", "status": "done", "content": "[REVIEW:2]"},
+  {"persona": "conductor", "status": "done", "content": "[REVIEW:2]"},
   {"persona": "agents/test-coder", "status": "done", "content": "[FIX:1]\n\nFixed again."},
   {"persona": "agents/test-reviewer-b", "status": "done", "content": "[_LOOP_JUDGE_REVIEW_FIX:2]\n\nAbort this loop."},
+  {"persona": "conductor", "status": "done", "content": "[_LOOP_JUDGE_REVIEW_FIX:2]"},
   {"persona": "conductor", "status": "done", "content": "[_LOOP_JUDGE_REVIEW_FIX:2]"}
 ]
diff --git a/e2e/fixtures/scenarios/cycle-detect-pass.json b/e2e/fixtures/scenarios/cycle-detect-pass.json
index 7891bd3..999ece9 100644
--- a/e2e/fixtures/scenarios/cycle-detect-pass.json
+++ b/e2e/fixtures/scenarios/cycle-detect-pass.json
@@ -1,7 +1,9 @@
 [
   {"persona": "agents/test-reviewer-a", "status": "done", "content": "[REVIEW:2]\n\nNeeds fix."},
   {"persona": "conductor", "status": "done", "content": "[REVIEW:2]"},
+  {"persona": "conductor", "status": "done", "content": "[REVIEW:2]"},
   {"persona": "agents/test-coder", "status": "done", "content": "[FIX:1]\n\nFixed."},
   {"persona": "agents/test-reviewer-a", "status": "done", "content": "[REVIEW:1]\n\nApproved."},
+  {"persona": "conductor", "status": "done", "content": "[REVIEW:1]"},
   {"persona": "conductor", "status": "done", "content": "[REVIEW:1]"}
 ]
diff --git a/e2e/fixtures/scenarios/multi-step-all-approved.json b/e2e/fixtures/scenarios/multi-step-all-approved.json
index 5392a8b..bb38ddc 100644
--- a/e2e/fixtures/scenarios/multi-step-all-approved.json
+++ b/e2e/fixtures/scenarios/multi-step-all-approved.json
@@ -1,7 +1,9 @@
 [
-  { "persona": "test-coder", "status": "done", "content": "Plan created." },
-  { "persona": "test-reviewer-a", "status": "done", "content": "Architecture approved." },
-  { "persona": "test-reviewer-b", "status": "done", "content": "Security approved." },
+  { "persona": "agents/test-coder", "status": "done", "content": "Plan created." },
+  { "persona": "agents/test-reviewer-a", "status": "done", "content": "Architecture approved." },
+  { "persona": "agents/test-reviewer-b", "status": "done", "content": "Security approved." },
+  { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:1]" },
+  { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:1]" },
   { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:1]" },
   { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:1]" }
 ]
diff --git a/e2e/fixtures/scenarios/multi-step-needs-fix.json b/e2e/fixtures/scenarios/multi-step-needs-fix.json
index 52b595d..fda74e3 100644
--- a/e2e/fixtures/scenarios/multi-step-needs-fix.json
+++ b/e2e/fixtures/scenarios/multi-step-needs-fix.json
@@ -1,15 +1,19 @@
 [
-  { "persona": "test-coder", "status": "done", "content": "Plan created." },
+  { "persona": "agents/test-coder", "status": "done", "content": "Plan created." },
 
-  { "persona": "test-reviewer-a", "status": "done", "content": "Architecture looks good." },
-  { "persona": "test-reviewer-b", "status": "done", "content": "Security issues found." },
+  { "persona": "agents/test-reviewer-a", "status": "done", "content": "Architecture looks good." },
+  { "persona": "agents/test-reviewer-b", "status": "done", "content": "Security issues found." },
+  { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:2]" },
+  { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:2]" },
   { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:2]" },
   { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:2]" },
 
-  { "persona": "test-coder", "status": "done", "content": "Fix applied." },
+  { "persona": "agents/test-coder", "status": "done", "content": "Fix applied." },
 
-  { "persona": "test-reviewer-a", "status": "done", "content": "Architecture still approved." },
-  { "persona": "test-reviewer-b", "status": "done", "content": "Security now approved." },
+  { "persona": "agents/test-reviewer-a", "status": "done", "content": "Architecture still approved." },
+  { "persona": "agents/test-reviewer-b", "status": "done", "content": "Security now approved." },
+  { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:1]" },
+  { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:1]" },
   { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:1]" },
   { "persona": "conductor", "status": "done", "content": "[ARCH-REVIEW:1] [SECURITY-REVIEW:1]" }
 ]
diff --git a/e2e/fixtures/scenarios/report-judge.json b/e2e/fixtures/scenarios/report-judge.json
index aacb7d4..57d7c66 100644
--- a/e2e/fixtures/scenarios/report-judge.json
+++ b/e2e/fixtures/scenarios/report-judge.json
@@ -9,6 +9,11 @@
     "status": "done",
     "content": "Report summary: OK"
   },
+  {
+    "persona": "conductor",
+    "status": "done",
+    "content": "[EXECUTE:1]"
+  },
   {
     "persona": "conductor",
     "status": "done",
diff --git a/e2e/helpers/test-repo.ts b/e2e/helpers/test-repo.ts
index 04c1c90..35cd4f1 100644
--- a/e2e/helpers/test-repo.ts
+++ b/e2e/helpers/test-repo.ts
@@ -54,6 +54,66 @@ function getGitHubUser(): string {
   return user;
 }
 
+function canUseGitHubRepo(): boolean {
+  try {
+    const user = getGitHubUser();
+    const repoName = `${user}/takt-testing`;
+    execFileSync('gh', ['repo', 'view', repoName], {
+      encoding: 'utf-8',
+      stdio: 'pipe',
+    });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+export function isGitHubE2EAvailable(): boolean {
+  return canUseGitHubRepo();
+}
+
+function createOfflineTestRepo(options?: CreateTestRepoOptions): TestRepo {
+  const sandboxPath = mkdtempSync(join(tmpdir(), 'takt-e2e-repo-'));
+  const originPath = join(sandboxPath, 'origin.git');
+  const repoPath = join(sandboxPath, 'work');
+
+  execFileSync('git', ['init', '--bare', originPath], { stdio: 'pipe' });
+  execFileSync('git', ['clone', originPath, repoPath], { stdio: 'pipe' });
+  execFileSync('git', ['config', 'user.email', 'test@example.com'], { cwd: repoPath, stdio: 'pipe' });
+  execFileSync('git', ['config', 'user.name', 'Test'], { cwd: repoPath, stdio: 'pipe' });
+  writeFileSync(join(repoPath, 'README.md'), '# test\n');
+  execFileSync('git', ['add', '.'], { cwd: repoPath, stdio: 'pipe' });
+  execFileSync('git', ['commit', '-m', 'init'], { cwd: repoPath, stdio: 'pipe' });
+  execFileSync('git', ['push', '-u', 'origin', 'HEAD'], { cwd: repoPath, stdio: 'pipe' });
+
+  const testBranch = options?.skipBranch ? undefined : `e2e-test-${Date.now()}`;
+  if (testBranch) {
+    execFileSync('git', ['checkout', '-b', testBranch], {
+      cwd: repoPath,
+      stdio: 'pipe',
+    });
+  }
+
+  const currentBranch = testBranch
+    ?? execFileSync('git', ['branch', '--show-current'], {
+      cwd: repoPath,
+      encoding: 'utf-8',
+    }).trim();
+
+  return {
+    path: repoPath,
+    repoName: 'local/takt-testing',
+    branch: currentBranch,
+    cleanup: () => {
+      try {
+        rmSync(sandboxPath, { recursive: true, force: true });
+      } catch {
+        // Best-effort cleanup
+      }
+    },
+  };
+}
+
 /**
  * Clone the takt-testing repository and create a test branch.
  *
@@ -63,6 +123,10 @@ function getGitHubUser(): string {
  *   3. Delete local directory
  */
 export function createTestRepo(options?: CreateTestRepoOptions): TestRepo {
+  if (!canUseGitHubRepo()) {
+    return createOfflineTestRepo(options);
+  }
+
   const user = getGitHubUser();
   const repoName = `${user}/takt-testing`;
 
diff --git a/e2e/specs/add.e2e.ts b/e2e/specs/add.e2e.ts
index bc7979c..f16cdce 100644
--- a/e2e/specs/add.e2e.ts
+++ b/e2e/specs/add.e2e.ts
@@ -9,11 +9,12 @@ import {
   updateIsolatedConfig,
   type IsolatedEnv,
 } from '../helpers/isolated-env';
-import { createTestRepo, type TestRepo } from '../helpers/test-repo';
+import { createTestRepo, isGitHubE2EAvailable, type TestRepo } from '../helpers/test-repo';
 import { runTakt } from '../helpers/takt-runner';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
+const requiresGitHub = isGitHubE2EAvailable();
 
 // E2E更新時は docs/testing/e2e.md も更新すること
 describe('E2E: Add task from GitHub issue (takt add)', () => {
@@ -67,7 +68,7 @@ describe('E2E: Add task from GitHub issue (takt add)', () => {
     }
   });
 
-  it('should create a task file from issue reference', () => {
+  it.skipIf(!requiresGitHub)('should create a task file from issue reference', () => {
     const scenarioPath = resolve(__dirname, '../fixtures/scenarios/add-task.json');
 
     const result = runTakt({
diff --git a/package.json b/package.json
index 92b5859..945badd 100644
--- a/package.json
+++ b/package.json
@@ -14,8 +14,8 @@
     "watch": "tsc --watch",
     "test": "vitest run",
     "test:watch": "vitest",
-    "test:e2e": "npm run test:e2e:all",
-    "test:e2e:mock": "vitest run --config vitest.config.e2e.mock.ts --reporter=verbose",
+    "test:e2e": "npm run test:e2e:mock; code=$?; if [ \"$code\" -eq 0 ]; then msg='test:e2e passed'; else msg=\"test:e2e failed (exit=$code)\"; fi; if command -v osascript >/dev/null 2>&1; then osascript -e \"display notification \\\"$msg\\\" with title \\\"takt\\\" subtitle \\\"E2E\\\"\" >/dev/null 2>&1 || true; fi; echo \"[takt] $msg\"; exit $code",
+    "test:e2e:mock": "TAKT_E2E_PROVIDER=mock vitest run --config vitest.config.e2e.mock.ts --reporter=verbose",
     "test:e2e:all": "npm run test:e2e:mock && npm run test:e2e:provider",
     "test:e2e:provider": "npm run test:e2e:provider:claude && npm run test:e2e:provider:codex",
     "test:e2e:provider:claude": "TAKT_E2E_PROVIDER=claude vitest run --config vitest.config.e2e.provider.ts --reporter=verbose",
diff --git a/src/__tests__/e2e-helpers.test.ts b/src/__tests__/e2e-helpers.test.ts
index 63b395d..f7b25d6 100644
--- a/src/__tests__/e2e-helpers.test.ts
+++ b/src/__tests__/e2e-helpers.test.ts
@@ -76,7 +76,7 @@ describe('createIsolatedEnv', () => {
     expect(isolated.env.GIT_CONFIG_GLOBAL).toContain('takt-e2e-');
   });
 
-  it('should create config.yaml from E2E fixture with notification_sound timing controls', () => {
+  it('should create config.yaml from E2E fixture with notification_sound disabled', () => {
     const isolated = createIsolatedEnv();
     cleanups.push(isolated.cleanup);
 
@@ -86,13 +86,13 @@ describe('createIsolatedEnv', () => {
     expect(config.language).toBe('en');
     expect(config.log_level).toBe('info');
     expect(config.default_piece).toBe('default');
-    expect(config.notification_sound).toBe(true);
+    expect(config.notification_sound).toBe(false);
     expect(config.notification_sound_events).toEqual({
       iteration_limit: false,
       piece_complete: false,
       piece_abort: false,
       run_complete: true,
-      run_abort: true,
+      run_abort: false,
     });
   });
 
@@ -120,13 +120,13 @@ describe('createIsolatedEnv', () => {
 
     expect(config.provider).toBe('mock');
     expect(config.concurrency).toBe(2);
-    expect(config.notification_sound).toBe(true);
+    expect(config.notification_sound).toBe(false);
     expect(config.notification_sound_events).toEqual({
       iteration_limit: false,
       piece_complete: false,
       piece_abort: false,
       run_complete: true,
-      run_abort: true,
+      run_abort: false,
     });
     expect(config.language).toBe('en');
   });
@@ -149,7 +149,7 @@ describe('createIsolatedEnv', () => {
       piece_complete: false,
       piece_abort: false,
       run_complete: false,
-      run_abort: true,
+      run_abort: false,
     });
   });
 
diff --git a/src/features/tasks/execute/parallelExecution.ts b/src/features/tasks/execute/parallelExecution.ts
index ff46711..39a67fd 100644
--- a/src/features/tasks/execute/parallelExecution.ts
+++ b/src/features/tasks/execute/parallelExecution.ts
@@ -123,7 +123,11 @@ export async function runWithWorkerPool(
           selfSigintInjected = true;
           process.emit('SIGINT');
           if (selfSigintTwice) {
-            process.emit('SIGINT');
+            // E2E deterministic path: force-exit shortly after graceful SIGINT.
+            // Avoids intermittent hangs caused by listener ordering/races.
+            setTimeout(() => {
+              process.exit(EXIT_SIGINT);
+            }, 25);
           }
         }
       }