feat(cli): add install and uninstall commands for skills (#16377)

packages/cli/src/commands/skills/install.test.ts

@@ -0,0 +1,79 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+
+const mockInstallSkill = vi.hoisted(() => vi.fn());
+
+vi.mock('../../utils/skillUtils.js', () => ({
+  installSkill: mockInstallSkill,
+}));
+
+vi.mock('@google/gemini-cli-core', () => ({
+  debugLogger: { log: vi.fn(), error: vi.fn() },
+}));
+
+import { debugLogger } from '@google/gemini-cli-core';
+import { handleInstall } from './install.js';
+
+describe('skill install command', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    vi.spyOn(process, 'exit').mockImplementation(() => undefined as never);
+  });
+
+  it('should call installSkill with correct arguments for user scope', async () => {
+    mockInstallSkill.mockResolvedValue([
+      { name: 'test-skill', location: '/mock/user/skills/test-skill' },
+    ]);
+
+    await handleInstall({
+      source: 'https://example.com/repo.git',
+      scope: 'user',
+    });
+
+    expect(mockInstallSkill).toHaveBeenCalledWith(
+      'https://example.com/repo.git',
+      'user',
+      undefined,
+      expect.any(Function),
+    );
+    expect(debugLogger.log).toHaveBeenCalledWith(
+      expect.stringContaining('Successfully installed skill: test-skill'),
+    );
+    expect(debugLogger.log).toHaveBeenCalledWith(
+      expect.stringContaining('location: /mock/user/skills/test-skill'),
+    );
+  });
+
+  it('should call installSkill with correct arguments for workspace scope and subpath', async () => {
+    mockInstallSkill.mockResolvedValue([
+      { name: 'test-skill', location: '/mock/workspace/skills/test-skill' },
+    ]);
+
+    await handleInstall({
+      source: 'https://example.com/repo.git',
+      scope: 'workspace',
+      path: 'my-skills-dir',
+    });
+
+    expect(mockInstallSkill).toHaveBeenCalledWith(
+      'https://example.com/repo.git',
+      'workspace',
+      'my-skills-dir',
+      expect.any(Function),
+    );
+  });
+
+  it('should handle errors gracefully', async () => {
+    mockInstallSkill.mockRejectedValue(new Error('Install failed'));
+
+    await handleInstall({ source: '/local/path' });
+
+    expect(debugLogger.error).toHaveBeenCalledWith('Install failed');
+    expect(process.exit).toHaveBeenCalledWith(1);
+  });
+});