feat(plan): add copy subcommand to plan (#20491)

docs/cli/plan-mode.md

@@ -21,6 +21,7 @@ implementation. It allows you to:
   - [Entering Plan Mode](#entering-plan-mode)
   - [Planning Workflow](#planning-workflow)
   - [Exiting Plan Mode](#exiting-plan-mode)
+  - [Commands](#commands)
 - [Tool Restrictions](#tool-restrictions)
   - [Customizing Planning with Skills](#customizing-planning-with-skills)
   - [Customizing Policies](#customizing-policies)
@@ -126,6 +127,10 @@ To exit Plan Mode, you can:
 - **Tool:** Gemini CLI calls the [`exit_plan_mode`] tool to present the
   finalized plan for your approval.
 
+### Commands
+
+- **`/plan copy`**: Copy the currently approved plan to your clipboard.
+
 ## Tool Restrictions
 
 Plan Mode enforces strict safety policies to prevent accidental changes.

docs/reference/commands.md

@@ -270,6 +270,9 @@ Slash commands provide meta-level control over the CLI itself.
   one has been generated.
   - **Note:** This feature requires the `experimental.plan` setting to be
     enabled in your configuration.
+- **Sub-commands:**
+  - **`copy`**:
+    - **Description:** Copy the currently approved plan to your clipboard.
 
 ### `/policies`
 

packages/cli/src/ui/commands/planCommand.test.ts

@@ -14,7 +14,9 @@ import {
   coreEvents,
   processSingleFileContent,
   type ProcessedFileReadResult,
+  readFileWithEncoding,
 } from '@google/gemini-cli-core';
+import { copyToClipboard } from '../utils/commandUtils.js';
 
 vi.mock('@google/gemini-cli-core', async (importOriginal) => {
   const actual =
@@ -25,6 +27,7 @@ vi.mock('@google/gemini-cli-core', async (importOriginal) => {
       emitFeedback: vi.fn(),
     },
     processSingleFileContent: vi.fn(),
+    readFileWithEncoding: vi.fn(),
     partToString: vi.fn((val) => val),
   };
 });
@@ -35,9 +38,14 @@ vi.mock('node:path', async (importOriginal) => {
     ...actual,
     default: { ...actual },
     join: vi.fn((...args) => args.join('/')),
+    basename: vi.fn((p) => p.split('/').pop()),
   };
 });
 
+vi.mock('../utils/commandUtils.js', () => ({
+  copyToClipboard: vi.fn(),
+}));
+
 describe('planCommand', () => {
   let mockContext: CommandContext;
 
@@ -115,4 +123,46 @@ describe('planCommand', () => {
       text: '# Approved Plan Content',
     });
   });
+
+  describe('copy subcommand', () => {
+    it('should copy the approved plan to clipboard', async () => {
+      const mockPlanPath = '/mock/plans/dir/approved-plan.md';
+      vi.mocked(
+        mockContext.services.config!.getApprovedPlanPath,
+      ).mockReturnValue(mockPlanPath);
+      vi.mocked(readFileWithEncoding).mockResolvedValue('# Plan Content');
+
+      const copySubCommand = planCommand.subCommands?.find(
+        (sc) => sc.name === 'copy',
+      );
+      if (!copySubCommand?.action) throw new Error('Copy action missing');
+
+      await copySubCommand.action(mockContext, '');
+
+      expect(readFileWithEncoding).toHaveBeenCalledWith(mockPlanPath);
+      expect(copyToClipboard).toHaveBeenCalledWith('# Plan Content');
+      expect(coreEvents.emitFeedback).toHaveBeenCalledWith(
+        'info',
+        'Plan copied to clipboard (approved-plan.md).',
+      );
+    });
+
+    it('should warn if no approved plan is found', async () => {
+      vi.mocked(
+        mockContext.services.config!.getApprovedPlanPath,
+      ).mockReturnValue(undefined);
+
+      const copySubCommand = planCommand.subCommands?.find(
+        (sc) => sc.name === 'copy',
+      );
+      if (!copySubCommand?.action) throw new Error('Copy action missing');
+
+      await copySubCommand.action(mockContext, '');
+
+      expect(coreEvents.emitFeedback).toHaveBeenCalledWith(
+        'warning',
+        'No approved plan found to copy.',
+      );
+    });
+  });
 });

packages/cli/src/ui/commands/planCommand.ts

@@ -4,22 +4,54 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import { CommandKind, type SlashCommand } from './types.js';
+import {
+  type CommandContext,
+  CommandKind,
+  type SlashCommand,
+} from './types.js';
 import {
   ApprovalMode,
   coreEvents,
   debugLogger,
   processSingleFileContent,
   partToString,
+  readFileWithEncoding,
 } from '@google/gemini-cli-core';
 import { MessageType } from '../types.js';
 import * as path from 'node:path';
+import { copyToClipboard } from '../utils/commandUtils.js';
+
+async function copyAction(context: CommandContext) {
+  const config = context.services.config;
+  if (!config) {
+    debugLogger.debug('Plan copy command: config is not available in context');
+    return;
+  }
+
+  const planPath = config.getApprovedPlanPath();
+
+  if (!planPath) {
+    coreEvents.emitFeedback('warning', 'No approved plan found to copy.');
+    return;
+  }
+
+  try {
+    const content = await readFileWithEncoding(planPath);
+    await copyToClipboard(content);
+    coreEvents.emitFeedback(
+      'info',
+      `Plan copied to clipboard (${path.basename(planPath)}).`,
+    );
+  } catch (error) {
+    coreEvents.emitFeedback('error', `Failed to copy plan: ${error}`, error);
+  }
+}
 
 export const planCommand: SlashCommand = {
   name: 'plan',
   description: 'Switch to Plan Mode and view current plan',
   kind: CommandKind.BUILT_IN,
-  autoExecute: true,
+  autoExecute: false,
   action: async (context) => {
     const config = context.services.config;
     if (!config) {
@@ -62,4 +94,13 @@ export const planCommand: SlashCommand = {
       );
     }
   },
+  subCommands: [
+    {
+      name: 'copy',
+      description: 'Copy the currently approved plan to your clipboard',
+      kind: CommandKind.BUILT_IN,
+      autoExecute: true,
+      action: copyAction,
+    },
+  ],
 };