6 files changed, 768 insertions, 1 deletions
diff --git a/packages/cli/src/services/CommandService.test.ts b/packages/cli/src/services/CommandService.test.ts
index d03bf988..de4ff2ea 100644
--- a/packages/cli/src/services/CommandService.test.ts
+++ b/packages/cli/src/services/CommandService.test.ts
@@ -11,6 +11,7 @@ import { type SlashCommand } from '../ui/commands/types.js';
 import { memoryCommand } from '../ui/commands/memoryCommand.js';
 import { helpCommand } from '../ui/commands/helpCommand.js';
 import { clearCommand } from '../ui/commands/clearCommand.js';
+import { copyCommand } from '../ui/commands/copyCommand.js';
 import { corgiCommand } from '../ui/commands/corgiCommand.js';
 import { docsCommand } from '../ui/commands/docsCommand.js';
 import { chatCommand } from '../ui/commands/chatCommand.js';
@@ -51,6 +52,9 @@ vi.mock('../ui/commands/authCommand.js', () => ({
 vi.mock('../ui/commands/themeCommand.js', () => ({
   themeCommand: { name: 'theme', description: 'Mock Theme' },
 }));
+vi.mock('../ui/commands/copyCommand.js', () => ({
+  copyCommand: { name: 'copy', description: 'Mock Copy' },
+}));
 vi.mock('../ui/commands/privacyCommand.js', () => ({
   privacyCommand: { name: 'privacy', description: 'Mock Privacy' },
 }));
@@ -89,7 +93,7 @@ vi.mock('../ui/commands/restoreCommand.js', () => ({
 }));
 
 describe('CommandService', () => {
-  const subCommandLen = 18;
+  const subCommandLen = 19;
   let mockConfig: Mocked<Config>;
 
   beforeEach(() => {
@@ -132,6 +136,7 @@ describe('CommandService', () => {
         expect(commandNames).toContain('memory');
         expect(commandNames).toContain('help');
         expect(commandNames).toContain('clear');
+        expect(commandNames).toContain('copy');
         expect(commandNames).toContain('compress');
         expect(commandNames).toContain('corgi');
         expect(commandNames).toContain('docs');
@@ -205,6 +210,7 @@ describe('CommandService', () => {
           bugCommand,
           chatCommand,
           clearCommand,
+          copyCommand,
           compressCommand,
           corgiCommand,
           docsCommand,
diff --git a/packages/cli/src/services/CommandService.ts b/packages/cli/src/services/CommandService.ts
index def8cfcc..99eccbf2 100644
--- a/packages/cli/src/services/CommandService.ts
+++ b/packages/cli/src/services/CommandService.ts
@@ -9,6 +9,7 @@ import { SlashCommand } from '../ui/commands/types.js';
 import { memoryCommand } from '../ui/commands/memoryCommand.js';
 import { helpCommand } from '../ui/commands/helpCommand.js';
 import { clearCommand } from '../ui/commands/clearCommand.js';
+import { copyCommand } from '../ui/commands/copyCommand.js';
 import { corgiCommand } from '../ui/commands/corgiCommand.js';
 import { docsCommand } from '../ui/commands/docsCommand.js';
 import { mcpCommand } from '../ui/commands/mcpCommand.js';
@@ -36,6 +37,7 @@ const loadBuiltInCommands = async (
     bugCommand,
     chatCommand,
     clearCommand,
+    copyCommand,
     compressCommand,
     corgiCommand,
     docsCommand,
diff --git a/packages/cli/src/ui/commands/copyCommand.test.ts b/packages/cli/src/ui/commands/copyCommand.test.ts
new file mode 100644
index 00000000..b163b43f
--- /dev/null
+++ b/packages/cli/src/ui/commands/copyCommand.test.ts
@@ -0,0 +1,296 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { vi, describe, it, expect, beforeEach, Mock } from 'vitest';
+import { copyCommand } from './copyCommand.js';
+import { type CommandContext } from './types.js';
+import { createMockCommandContext } from '../../test-utils/mockCommandContext.js';
+import { copyToClipboard } from '../utils/commandUtils.js';
+
+vi.mock('../utils/commandUtils.js', () => ({
+  copyToClipboard: vi.fn(),
+}));
+
+describe('copyCommand', () => {
+  let mockContext: CommandContext;
+  let mockCopyToClipboard: Mock;
+  let mockGetChat: Mock;
+  let mockGetHistory: Mock;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+
+    mockCopyToClipboard = vi.mocked(copyToClipboard);
+    mockGetChat = vi.fn();
+    mockGetHistory = vi.fn();
+
+    mockContext = createMockCommandContext({
+      services: {
+        config: {
+          getGeminiClient: () => ({
+            getChat: mockGetChat,
+          }),
+        },
+      },
+    });
+
+    mockGetChat.mockReturnValue({
+      getHistory: mockGetHistory,
+    });
+  });
+
+  it('should return info message when no history is available', async () => {
+    if (!copyCommand.action) throw new Error('Command has no action');
+
+    mockGetChat.mockReturnValue(undefined);
+
+    const result = await copyCommand.action(mockContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'info',
+      content: 'No output in history',
+    });
+
+    expect(mockCopyToClipboard).not.toHaveBeenCalled();
+  });
+
+  it('should return info message when history is empty', async () => {
+    if (!copyCommand.action) throw new Error('Command has no action');
+
+    mockGetHistory.mockReturnValue([]);
+
+    const result = await copyCommand.action(mockContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'info',
+      content: 'No output in history',
+    });
+
+    expect(mockCopyToClipboard).not.toHaveBeenCalled();
+  });
+
+  it('should return info message when no AI messages are found in history', async () => {
+    if (!copyCommand.action) throw new Error('Command has no action');
+
+    const historyWithUserOnly = [
+      {
+        role: 'user',
+        parts: [{ text: 'Hello' }],
+      },
+    ];
+
+    mockGetHistory.mockReturnValue(historyWithUserOnly);
+
+    const result = await copyCommand.action(mockContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'info',
+      content: 'No output in history',
+    });
+
+    expect(mockCopyToClipboard).not.toHaveBeenCalled();
+  });
+
+  it('should copy last AI message to clipboard successfully', async () => {
+    if (!copyCommand.action) throw new Error('Command has no action');
+
+    const historyWithAiMessage = [
+      {
+        role: 'user',
+        parts: [{ text: 'Hello' }],
+      },
+      {
+        role: 'model',
+        parts: [{ text: 'Hi there! How can I help you?' }],
+      },
+    ];
+
+    mockGetHistory.mockReturnValue(historyWithAiMessage);
+    mockCopyToClipboard.mockResolvedValue(undefined);
+
+    const result = await copyCommand.action(mockContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'info',
+      content: 'Last output copied to the clipboard',
+    });
+
+    expect(mockCopyToClipboard).toHaveBeenCalledWith(
+      'Hi there! How can I help you?',
+    );
+  });
+
+  it('should handle multiple text parts in AI message', async () => {
+    if (!copyCommand.action) throw new Error('Command has no action');
+
+    const historyWithMultipleParts = [
+      {
+        role: 'model',
+        parts: [{ text: 'Part 1: ' }, { text: 'Part 2: ' }, { text: 'Part 3' }],
+      },
+    ];
+
+    mockGetHistory.mockReturnValue(historyWithMultipleParts);
+    mockCopyToClipboard.mockResolvedValue(undefined);
+
+    const result = await copyCommand.action(mockContext, '');
+
+    expect(mockCopyToClipboard).toHaveBeenCalledWith('Part 1: Part 2: Part 3');
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'info',
+      content: 'Last output copied to the clipboard',
+    });
+  });
+
+  it('should filter out non-text parts', async () => {
+    if (!copyCommand.action) throw new Error('Command has no action');
+
+    const historyWithMixedParts = [
+      {
+        role: 'model',
+        parts: [
+          { text: 'Text part' },
+          { image: 'base64data' }, // Non-text part
+          { text: ' more text' },
+        ],
+      },
+    ];
+
+    mockGetHistory.mockReturnValue(historyWithMixedParts);
+    mockCopyToClipboard.mockResolvedValue(undefined);
+
+    const result = await copyCommand.action(mockContext, '');
+
+    expect(mockCopyToClipboard).toHaveBeenCalledWith('Text part more text');
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'info',
+      content: 'Last output copied to the clipboard',
+    });
+  });
+
+  it('should get the last AI message when multiple AI messages exist', async () => {
+    if (!copyCommand.action) throw new Error('Command has no action');
+
+    const historyWithMultipleAiMessages = [
+      {
+        role: 'model',
+        parts: [{ text: 'First AI response' }],
+      },
+      {
+        role: 'user',
+        parts: [{ text: 'User message' }],
+      },
+      {
+        role: 'model',
+        parts: [{ text: 'Second AI response' }],
+      },
+    ];
+
+    mockGetHistory.mockReturnValue(historyWithMultipleAiMessages);
+    mockCopyToClipboard.mockResolvedValue(undefined);
+
+    const result = await copyCommand.action(mockContext, '');
+
+    expect(mockCopyToClipboard).toHaveBeenCalledWith('Second AI response');
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'info',
+      content: 'Last output copied to the clipboard',
+    });
+  });
+
+  it('should handle clipboard copy error', async () => {
+    if (!copyCommand.action) throw new Error('Command has no action');
+
+    const historyWithAiMessage = [
+      {
+        role: 'model',
+        parts: [{ text: 'AI response' }],
+      },
+    ];
+
+    mockGetHistory.mockReturnValue(historyWithAiMessage);
+    const clipboardError = new Error('Clipboard access denied');
+    mockCopyToClipboard.mockRejectedValue(clipboardError);
+
+    const result = await copyCommand.action(mockContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'error',
+      content: 'Failed to copy to the clipboard.',
+    });
+  });
+
+  it('should handle non-Error clipboard errors', async () => {
+    if (!copyCommand.action) throw new Error('Command has no action');
+
+    const historyWithAiMessage = [
+      {
+        role: 'model',
+        parts: [{ text: 'AI response' }],
+      },
+    ];
+
+    mockGetHistory.mockReturnValue(historyWithAiMessage);
+    mockCopyToClipboard.mockRejectedValue('String error');
+
+    const result = await copyCommand.action(mockContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'error',
+      content: 'Failed to copy to the clipboard.',
+    });
+  });
+
+  it('should return info message when no text parts found in AI message', async () => {
+    if (!copyCommand.action) throw new Error('Command has no action');
+
+    const historyWithEmptyParts = [
+      {
+        role: 'model',
+        parts: [{ image: 'base64data' }], // No text parts
+      },
+    ];
+
+    mockGetHistory.mockReturnValue(historyWithEmptyParts);
+
+    const result = await copyCommand.action(mockContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'info',
+      content: 'Last AI output contains no text to copy.',
+    });
+
+    expect(mockCopyToClipboard).not.toHaveBeenCalled();
+  });
+
+  it('should handle unavailable config service', async () => {
+    if (!copyCommand.action) throw new Error('Command has no action');
+
+    const nullConfigContext = createMockCommandContext({
+      services: { config: null },
+    });
+
+    const result = await copyCommand.action(nullConfigContext, '');
+
+    expect(result).toEqual({
+      type: 'message',
+      messageType: 'info',
+      content: 'No output in history',
+    });
+
+    expect(mockCopyToClipboard).not.toHaveBeenCalled();
+  });
+});
diff --git a/packages/cli/src/ui/commands/copyCommand.ts b/packages/cli/src/ui/commands/copyCommand.ts
new file mode 100644
index 00000000..5714b5ab
--- /dev/null
+++ b/packages/cli/src/ui/commands/copyCommand.ts
@@ -0,0 +1,62 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { copyToClipboard } from '../utils/commandUtils.js';
+import { SlashCommand, SlashCommandActionReturn } from './types.js';
+
+export const copyCommand: SlashCommand = {
+  name: 'copy',
+  description: 'Copy the last result or code snippet to clipboard',
+  action: async (context, _args): Promise<SlashCommandActionReturn | void> => {
+    const chat = await context.services.config?.getGeminiClient()?.getChat();
+    const history = chat?.getHistory();
+
+    // Get the last message from the AI (model role)
+    const lastAiMessage = history
+      ? history.filter((item) => item.role === 'model').pop()
+      : undefined;
+
+    if (!lastAiMessage) {
+      return {
+        type: 'message',
+        messageType: 'info',
+        content: 'No output in history',
+      };
+    }
+    // Extract text from the parts
+    const lastAiOutput = lastAiMessage.parts
+      ?.filter((part) => part.text)
+      .map((part) => part.text)
+      .join('');
+
+    if (lastAiOutput) {
+      try {
+        await copyToClipboard(lastAiOutput);
+
+        return {
+          type: 'message',
+          messageType: 'info',
+          content: 'Last output copied to the clipboard',
+        };
+      } catch (error) {
+        const message = error instanceof Error ? error.message : String(error);
+        console.debug(message);
+
+        return {
+          type: 'message',
+          messageType: 'error',
+          content: 'Failed to copy to the clipboard.',
+        };
+      }
+    } else {
+      return {
+        type: 'message',
+        messageType: 'info',
+        content: 'Last AI output contains no text to copy.',
+      };
+    }
+  },
+};
diff --git a/packages/cli/src/ui/utils/commandUtils.test.ts b/packages/cli/src/ui/utils/commandUtils.test.ts
new file mode 100644
index 00000000..158a5f7a
--- /dev/null
+++ b/packages/cli/src/ui/utils/commandUtils.test.ts
@@ -0,0 +1,345 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { vi, describe, it, expect, beforeEach, Mock } from 'vitest';
+import { spawn } from 'child_process';
+import { EventEmitter } from 'events';
+import {
+  isAtCommand,
+  isSlashCommand,
+  copyToClipboard,
+} from './commandUtils.js';
+
+// Mock child_process
+vi.mock('child_process');
+
+// Mock process.platform for platform-specific tests
+const mockProcess = vi.hoisted(() => ({
+  platform: 'darwin',
+}));
+
+vi.stubGlobal('process', {
+  ...process,
+  get platform() {
+    return mockProcess.platform;
+  },
+});
+
+interface MockChildProcess extends EventEmitter {
+  stdin: EventEmitter & {
+    write: Mock;
+    end: Mock;
+  };
+  stderr: EventEmitter;
+}
+
+describe('commandUtils', () => {
+  let mockSpawn: Mock;
+  let mockChild: MockChildProcess;
+
+  beforeEach(async () => {
+    vi.clearAllMocks();
+    // Dynamically import and set up spawn mock
+    const { spawn } = await import('child_process');
+    mockSpawn = spawn as Mock;
+
+    // Create mock child process with stdout/stderr emitters
+    mockChild = Object.assign(new EventEmitter(), {
+      stdin: Object.assign(new EventEmitter(), {
+        write: vi.fn(),
+        end: vi.fn(),
+      }),
+      stderr: new EventEmitter(),
+    }) as MockChildProcess;
+
+    mockSpawn.mockReturnValue(mockChild as unknown as ReturnType<typeof spawn>);
+  });
+
+  describe('isAtCommand', () => {
+    it('should return true when query starts with @', () => {
+      expect(isAtCommand('@file')).toBe(true);
+      expect(isAtCommand('@path/to/file')).toBe(true);
+      expect(isAtCommand('@')).toBe(true);
+    });
+
+    it('should return true when query contains @ preceded by whitespace', () => {
+      expect(isAtCommand('hello @file')).toBe(true);
+      expect(isAtCommand('some text @path/to/file')).toBe(true);
+      expect(isAtCommand('   @file')).toBe(true);
+    });
+
+    it('should return false when query does not start with @ and has no spaced @', () => {
+      expect(isAtCommand('file')).toBe(false);
+      expect(isAtCommand('hello')).toBe(false);
+      expect(isAtCommand('')).toBe(false);
+      expect(isAtCommand('[email protected]')).toBe(false);
+      expect(isAtCommand('user@host')).toBe(false);
+    });
+
+    it('should return false when @ is not preceded by whitespace', () => {
+      expect(isAtCommand('hello@file')).toBe(false);
+      expect(isAtCommand('text@path')).toBe(false);
+    });
+  });
+
+  describe('isSlashCommand', () => {
+    it('should return true when query starts with /', () => {
+      expect(isSlashCommand('/help')).toBe(true);
+      expect(isSlashCommand('/memory show')).toBe(true);
+      expect(isSlashCommand('/clear')).toBe(true);
+      expect(isSlashCommand('/')).toBe(true);
+    });
+
+    it('should return false when query does not start with /', () => {
+      expect(isSlashCommand('help')).toBe(false);
+      expect(isSlashCommand('memory show')).toBe(false);
+      expect(isSlashCommand('')).toBe(false);
+      expect(isSlashCommand('path/to/file')).toBe(false);
+      expect(isSlashCommand(' /help')).toBe(false);
+    });
+  });
+
+  describe('copyToClipboard', () => {
+    describe('on macOS (darwin)', () => {
+      beforeEach(() => {
+        mockProcess.platform = 'darwin';
+      });
+
+      it('should successfully copy text to clipboard using pbcopy', async () => {
+        const testText = 'Hello, world!';
+
+        // Simulate successful execution
+        setTimeout(() => {
+          mockChild.emit('close', 0);
+        }, 0);
+
+        await copyToClipboard(testText);
+
+        expect(mockSpawn).toHaveBeenCalledWith('pbcopy', []);
+        expect(mockChild.stdin.write).toHaveBeenCalledWith(testText);
+        expect(mockChild.stdin.end).toHaveBeenCalled();
+      });
+
+      it('should handle pbcopy command failure', async () => {
+        const testText = 'Hello, world!';
+
+        // Simulate command failure
+        setTimeout(() => {
+          mockChild.stderr.emit('data', 'Command not found');
+          mockChild.emit('close', 1);
+        }, 0);
+
+        await expect(copyToClipboard(testText)).rejects.toThrow(
+          "'pbcopy' exited with code 1: Command not found",
+        );
+      });
+
+      it('should handle spawn error', async () => {
+        const testText = 'Hello, world!';
+
+        setTimeout(() => {
+          mockChild.emit('error', new Error('spawn error'));
+        }, 0);
+
+        await expect(copyToClipboard(testText)).rejects.toThrow('spawn error');
+      });
+
+      it('should handle stdin write error', async () => {
+        const testText = 'Hello, world!';
+
+        setTimeout(() => {
+          mockChild.stdin.emit('error', new Error('stdin error'));
+        }, 0);
+
+        await expect(copyToClipboard(testText)).rejects.toThrow('stdin error');
+      });
+    });
+
+    describe('on Windows (win32)', () => {
+      beforeEach(() => {
+        mockProcess.platform = 'win32';
+      });
+
+      it('should successfully copy text to clipboard using clip', async () => {
+        const testText = 'Hello, world!';
+
+        setTimeout(() => {
+          mockChild.emit('close', 0);
+        }, 0);
+
+        await copyToClipboard(testText);
+
+        expect(mockSpawn).toHaveBeenCalledWith('clip', []);
+        expect(mockChild.stdin.write).toHaveBeenCalledWith(testText);
+        expect(mockChild.stdin.end).toHaveBeenCalled();
+      });
+    });
+
+    describe('on Linux', () => {
+      beforeEach(() => {
+        mockProcess.platform = 'linux';
+      });
+
+      it('should successfully copy text to clipboard using xclip', async () => {
+        const testText = 'Hello, world!';
+
+        setTimeout(() => {
+          mockChild.emit('close', 0);
+        }, 0);
+
+        await copyToClipboard(testText);
+
+        expect(mockSpawn).toHaveBeenCalledWith('xclip', [
+          '-selection',
+          'clipboard',
+        ]);
+        expect(mockChild.stdin.write).toHaveBeenCalledWith(testText);
+        expect(mockChild.stdin.end).toHaveBeenCalled();
+      });
+
+      it('should fallback to xsel when xclip fails', async () => {
+        const testText = 'Hello, world!';
+        let callCount = 0;
+
+        mockSpawn.mockImplementation(() => {
+          const child = Object.assign(new EventEmitter(), {
+            stdin: Object.assign(new EventEmitter(), {
+              write: vi.fn(),
+              end: vi.fn(),
+            }),
+            stderr: new EventEmitter(),
+          }) as MockChildProcess;
+
+          setTimeout(() => {
+            if (callCount === 0) {
+              // First call (xclip) fails
+              child.stderr.emit('data', 'xclip not found');
+              child.emit('close', 1);
+              callCount++;
+            } else {
+              // Second call (xsel) succeeds
+              child.emit('close', 0);
+            }
+          }, 0);
+
+          return child as unknown as ReturnType<typeof spawn>;
+        });
+
+        await copyToClipboard(testText);
+
+        expect(mockSpawn).toHaveBeenCalledTimes(2);
+        expect(mockSpawn).toHaveBeenNthCalledWith(1, 'xclip', [
+          '-selection',
+          'clipboard',
+        ]);
+        expect(mockSpawn).toHaveBeenNthCalledWith(2, 'xsel', [
+          '--clipboard',
+          '--input',
+        ]);
+      });
+
+      it('should throw error when both xclip and xsel fail', async () => {
+        const testText = 'Hello, world!';
+        let callCount = 0;
+
+        mockSpawn.mockImplementation(() => {
+          const child = Object.assign(new EventEmitter(), {
+            stdin: Object.assign(new EventEmitter(), {
+              write: vi.fn(),
+              end: vi.fn(),
+            }),
+            stderr: new EventEmitter(),
+          });
+
+          setTimeout(() => {
+            if (callCount === 0) {
+              // First call (xclip) fails
+              child.stderr.emit('data', 'xclip command not found');
+              child.emit('close', 1);
+              callCount++;
+            } else {
+              // Second call (xsel) fails
+              child.stderr.emit('data', 'xsel command not found');
+              child.emit('close', 1);
+            }
+          }, 0);
+
+          return child as unknown as ReturnType<typeof spawn>;
+        });
+
+        await expect(copyToClipboard(testText)).rejects.toThrow(
+          /All copy commands failed/,
+        );
+
+        expect(mockSpawn).toHaveBeenCalledTimes(2);
+      });
+    });
+
+    describe('on unsupported platform', () => {
+      beforeEach(() => {
+        mockProcess.platform = 'unsupported';
+      });
+
+      it('should throw error for unsupported platform', async () => {
+        await expect(copyToClipboard('test')).rejects.toThrow(
+          'Unsupported platform: unsupported',
+        );
+      });
+    });
+
+    describe('error handling', () => {
+      beforeEach(() => {
+        mockProcess.platform = 'darwin';
+      });
+
+      it('should handle command exit without stderr', async () => {
+        const testText = 'Hello, world!';
+
+        setTimeout(() => {
+          mockChild.emit('close', 1);
+        }, 0);
+
+        await expect(copyToClipboard(testText)).rejects.toThrow(
+          "'pbcopy' exited with code 1",
+        );
+      });
+
+      it('should handle empty text', async () => {
+        setTimeout(() => {
+          mockChild.emit('close', 0);
+        }, 0);
+
+        await copyToClipboard('');
+
+        expect(mockChild.stdin.write).toHaveBeenCalledWith('');
+      });
+
+      it('should handle multiline text', async () => {
+        const multilineText = 'Line 1\nLine 2\nLine 3';
+
+        setTimeout(() => {
+          mockChild.emit('close', 0);
+        }, 0);
+
+        await copyToClipboard(multilineText);
+
+        expect(mockChild.stdin.write).toHaveBeenCalledWith(multilineText);
+      });
+
+      it('should handle special characters', async () => {
+        const specialText = 'Special chars: !@#$%^&*()_+-=[]{}|;:,.<>?';
+
+        setTimeout(() => {
+          mockChild.emit('close', 0);
+        }, 0);
+
+        await copyToClipboard(specialText);
+
+        expect(mockChild.stdin.write).toHaveBeenCalledWith(specialText);
+      });
+    });
+  });
+});
diff --git a/packages/cli/src/ui/utils/commandUtils.ts b/packages/cli/src/ui/utils/commandUtils.ts
index aadd035e..4280388f 100644
--- a/packages/cli/src/ui/utils/commandUtils.ts
+++ b/packages/cli/src/ui/utils/commandUtils.ts
@@ -4,6 +4,8 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+import { spawn } from 'child_process';
+
 /**
  * Checks if a query string potentially represents an '@' command.
  * It triggers if the query starts with '@' or contains '@' preceded by whitespace
@@ -24,3 +26,57 @@ export const isAtCommand = (query: string): boolean =>
  * @returns True if the query looks like an '/' command, false otherwise.
  */
 export const isSlashCommand = (query: string): boolean => query.startsWith('/');
+
+//Copies a string snippet to the clipboard for different platforms
+export const copyToClipboard = async (text: string): Promise<void> => {
+  const run = (cmd: string, args: string[]) =>
+    new Promise<void>((resolve, reject) => {
+      const child = spawn(cmd, args);
+      let stderr = '';
+      child.stderr.on('data', (chunk) => (stderr += chunk.toString()));
+      child.on('error', reject);
+      child.on('close', (code) => {
+        if (code === 0) return resolve();
+        const errorMsg = stderr.trim();
+        reject(
+          new Error(
+            `'${cmd}' exited with code ${code}${errorMsg ? `: ${errorMsg}` : ''}`,
+          ),
+        );
+      });
+      child.stdin.on('error', reject);
+      child.stdin.write(text);
+      child.stdin.end();
+    });
+
+  switch (process.platform) {
+    case 'win32':
+      return run('clip', []);
+    case 'darwin':
+      return run('pbcopy', []);
+    case 'linux':
+      try {
+        await run('xclip', ['-selection', 'clipboard']);
+      } catch (primaryError) {
+        try {
+          // If xclip fails for any reason, try xsel as a fallback.
+          await run('xsel', ['--clipboard', '--input']);
+        } catch (fallbackError) {
+          const primaryMsg =
+            primaryError instanceof Error
+              ? primaryError.message
+              : String(primaryError);
+          const fallbackMsg =
+            fallbackError instanceof Error
+              ? fallbackError.message
+              : String(fallbackError);
+          throw new Error(
+            `All copy commands failed. xclip: "${primaryMsg}", xsel: "${fallbackMsg}". Please ensure xclip or xsel is installed and configured.`,
+          );
+        }
+      }
+      return;
+    default:
+      throw new Error(`Unsupported platform: ${process.platform}`);
+  }
+};