diff --git a/src/__tests__/taskExecution.test.ts b/src/__tests__/taskExecution.test.ts
index 60d49d0..382e00c 100644
--- a/src/__tests__/taskExecution.test.ts
+++ b/src/__tests__/taskExecution.test.ts
@@ -2,6 +2,9 @@
  * Tests for resolveTaskExecution
  */
 
+import * as fs from 'node:fs';
+import * as os from 'node:os';
+import * as path from 'node:path';
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 
 // Mock dependencies before importing the module under test
@@ -522,7 +525,13 @@ describe('resolveTaskExecution', () => {
     expect(mockCreateSharedClone).not.toHaveBeenCalled();
   });
 
-  it('should return reportDirName from taskDir basename', async () => {
+  it('should stage task_dir spec into run context and return reportDirName', async () => {
+    const tmpRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'takt-taskdir-normal-'));
+    const projectDir = path.join(tmpRoot, 'project');
+    fs.mkdirSync(path.join(projectDir, '.takt', 'tasks', '20260201-015714-foptng'), { recursive: true });
+    const sourceOrder = path.join(projectDir, '.takt', 'tasks', '20260201-015714-foptng', 'order.md');
+    fs.writeFileSync(sourceOrder, '# normal task spec\n', 'utf-8');
+
     const task: TaskInfo = {
       name: 'task-with-dir',
       content: 'Task content',
@@ -533,9 +542,15 @@ describe('resolveTaskExecution', () => {
       },
     };
 
-    const result = await resolveTaskExecution(task, '/project', 'default');
+    const result = await resolveTaskExecution(task, projectDir, 'default');
 
     expect(result.reportDirName).toBe('20260201-015714-foptng');
+    expect(result.execCwd).toBe(projectDir);
+    const stagedOrder = path.join(projectDir, '.takt', 'runs', '20260201-015714-foptng', 'context', 'task', 'order.md');
+    expect(fs.existsSync(stagedOrder)).toBe(true);
+    expect(fs.readFileSync(stagedOrder, 'utf-8')).toContain('normal task spec');
+    expect(result.taskPrompt).toContain('Primary spec: `.takt/runs/20260201-015714-foptng/context/task/order.md`.');
+    expect(result.taskPrompt).not.toContain(projectDir);
   });
 
   it('should throw when taskDir format is invalid', async () => {
@@ -569,4 +584,41 @@ describe('resolveTaskExecution', () => {
       'Invalid task_dir format: .takt/tasks/..',
     );
   });
+
+  it('should stage task_dir spec into worktree run context and return run-scoped task prompt', async () => {
+    const tmpRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'takt-taskdir-'));
+    const projectDir = path.join(tmpRoot, 'project');
+    const cloneDir = path.join(tmpRoot, 'clone');
+    fs.mkdirSync(path.join(projectDir, '.takt', 'tasks', '20260201-015714-foptng'), { recursive: true });
+    fs.mkdirSync(cloneDir, { recursive: true });
+    const sourceOrder = path.join(projectDir, '.takt', 'tasks', '20260201-015714-foptng', 'order.md');
+    fs.writeFileSync(sourceOrder, '# webhook task\n', 'utf-8');
+
+    const task: TaskInfo = {
+      name: 'task-with-taskdir-worktree',
+      content: 'Task content',
+      taskDir: '.takt/tasks/20260201-015714-foptng',
+      filePath: '/tasks/task.yaml',
+      data: {
+        task: 'Task content',
+        worktree: true,
+      },
+    };
+
+    mockSummarizeTaskName.mockResolvedValue('webhook-task');
+    mockCreateSharedClone.mockReturnValue({
+      path: cloneDir,
+      branch: 'takt/webhook-task',
+    });
+
+    const result = await resolveTaskExecution(task, projectDir, 'default');
+
+    const stagedOrder = path.join(cloneDir, '.takt', 'runs', '20260201-015714-foptng', 'context', 'task', 'order.md');
+    expect(fs.existsSync(stagedOrder)).toBe(true);
+    expect(fs.readFileSync(stagedOrder, 'utf-8')).toContain('webhook task');
+
+    expect(result.taskPrompt).toContain('Implement using only the files in `.takt/runs/20260201-015714-foptng/context/task`.');
+    expect(result.taskPrompt).toContain('Primary spec: `.takt/runs/20260201-015714-foptng/context/task/order.md`.');
+    expect(result.taskPrompt).not.toContain(projectDir);
+  });
 });
diff --git a/src/app/cli/index.ts b/src/app/cli/index.ts
index c93b140..76394a9 100644
--- a/src/app/cli/index.ts
+++ b/src/app/cli/index.ts
@@ -36,8 +36,6 @@ import { executeDefaultAction } from './routing.js';
   // Normal parsing for all other cases (including '#' prefixed inputs)
   await program.parseAsync();
 
-  // Some providers/SDKs may leave active handles even after command completion.
-  // Keep only watch mode as a long-running command; all others should exit explicitly.
   const rootArg = process.argv.slice(2)[0];
   if (rootArg !== 'watch') {
     process.exit(0);
diff --git a/src/features/tasks/execute/resolveTask.ts b/src/features/tasks/execute/resolveTask.ts
index a63fd25..e860e65 100644
--- a/src/features/tasks/execute/resolveTask.ts
+++ b/src/features/tasks/execute/resolveTask.ts
@@ -2,6 +2,8 @@
  * Resolve execution directory and piece from task data.
  */
 
+import * as fs from 'node:fs';
+import * as path from 'node:path';
 import { loadGlobalConfig } from '../../../infra/config/index.js';
 import { type TaskInfo, createSharedClone, summarizeTaskName, getCurrentBranch } from '../../../infra/task/index.js';
 import { info, withProgress } from '../../../shared/ui/index.js';
@@ -11,6 +13,7 @@ export interface ResolvedTaskExecution {
   execCwd: string;
   execPiece: string;
   isWorktree: boolean;
+  taskPrompt?: string;
   reportDirName?: string;
   branch?: string;
   baseBranch?: string;
@@ -20,6 +23,36 @@ export interface ResolvedTaskExecution {
   issueNumber?: number;
 }
 
+function buildRunTaskDirInstruction(reportDirName: string): string {
+  const runTaskDir = `.takt/runs/${reportDirName}/context/task`;
+  const orderFile = `${runTaskDir}/order.md`;
+  return [
+    `Implement using only the files in \`${runTaskDir}\`.`,
+    `Primary spec: \`${orderFile}\`.`,
+    'Use report files in Report Directory as primary execution history.',
+    'Do not rely on previous response or conversation summary.',
+  ].join('\n');
+}
+
+function stageTaskSpecForExecution(
+  projectCwd: string,
+  execCwd: string,
+  taskDir: string,
+  reportDirName: string,
+): string {
+  const sourceOrderPath = path.join(projectCwd, taskDir, 'order.md');
+  if (!fs.existsSync(sourceOrderPath)) {
+    throw new Error(`Task spec file is missing: ${sourceOrderPath}`);
+  }
+
+  const targetTaskDir = path.join(execCwd, '.takt', 'runs', reportDirName, 'context', 'task');
+  const targetOrderPath = path.join(targetTaskDir, 'order.md');
+  fs.mkdirSync(targetTaskDir, { recursive: true });
+  fs.copyFileSync(sourceOrderPath, targetOrderPath);
+
+  return buildRunTaskDirInstruction(reportDirName);
+}
+
 function throwIfAborted(signal?: AbortSignal): void {
   if (signal?.aborted) {
     throw new Error('Task execution aborted');
@@ -47,6 +80,7 @@ export async function resolveTaskExecution(
   let execCwd = defaultCwd;
   let isWorktree = false;
   let reportDirName: string | undefined;
+  let taskPrompt: string | undefined;
   let branch: string | undefined;
   let baseBranch: string | undefined;
   if (task.taskDir) {
@@ -81,6 +115,11 @@ export async function resolveTaskExecution(
     execCwd = result.path;
     branch = result.branch;
     isWorktree = true;
+
+  }
+
+  if (task.taskDir && reportDirName) {
+    taskPrompt = stageTaskSpecForExecution(defaultCwd, execCwd, task.taskDir, reportDirName);
   }
 
   const execPiece = data.piece || defaultPiece;
@@ -99,6 +138,7 @@ export async function resolveTaskExecution(
     execCwd,
     execPiece,
     isWorktree,
+    ...(taskPrompt ? { taskPrompt } : {}),
     ...(reportDirName ? { reportDirName } : {}),
     ...(branch ? { branch } : {}),
     ...(baseBranch ? { baseBranch } : {}),
diff --git a/src/features/tasks/execute/taskExecution.ts b/src/features/tasks/execute/taskExecution.ts
index 5c17e3a..bdc50cb 100644
--- a/src/features/tasks/execute/taskExecution.ts
+++ b/src/features/tasks/execute/taskExecution.ts
@@ -130,11 +130,23 @@ export async function executeAndCompleteTask(
   }
 
   try {
-    const { execCwd, execPiece, isWorktree, reportDirName, branch, baseBranch, startMovement, retryNote, autoPr, issueNumber } = await resolveTaskExecution(task, cwd, pieceName, taskAbortSignal);
+    const {
+      execCwd,
+      execPiece,
+      isWorktree,
+      taskPrompt,
+      reportDirName,
+      branch,
+      baseBranch,
+      startMovement,
+      retryNote,
+      autoPr,
+      issueNumber,
+    } = await resolveTaskExecution(task, cwd, pieceName, taskAbortSignal);
 
     // cwd is always the project root; pass it as projectCwd so reports/sessions go there
     const taskRunResult = await executeTaskWithResult({
-      task: task.content,
+      task: taskPrompt ?? task.content,
       cwd: execCwd,
       pieceIdentifier: execPiece,
       projectCwd: cwd,
diff --git a/src/shared/prompt/confirm.ts b/src/shared/prompt/confirm.ts
index ac3bc4f..663cde8 100644
--- a/src/shared/prompt/confirm.ts
+++ b/src/shared/prompt/confirm.ts
@@ -14,9 +14,7 @@ function pauseStdinSafely(): void {
     if (process.stdin.readable && !process.stdin.destroyed) {
       process.stdin.pause();
     }
-  } catch {
-    // Ignore stdin state errors during prompt cleanup.
-  }
+  } catch {}
 }
 
 /**