Remove built-in skills concept

[gricha]

Summary

• Remove the concept of built-in skills entirely
• Users now bootstrap their environment with skills from conventional directories (.warden/skills/, .agents/skills/, .claude/skills/)
• Move warden-skill, agent-prompt, notseer to .claude/skills/
• Delete security-review, code-simplifier, performance-review skills
• Remove getBuiltinSkill() and getBuiltinSkillNames() from public API

Test plan

• pnpm lint passes
• pnpm build passes
• pnpm test passes (502 tests)

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Project	Deployment	Actions	Updated (UTC)
warden	Ready	Preview, Comment	Jan 31, 2026 4:07am

[sentry-warden]

testing-guidelines

testing-guidelines: Found 2 issues (2 medium)

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_{⏱ 369.0s · 2.0M in / 24.7k out · $3.59}

[sentry-warden]

🟠 Tests skip execution when no examples exist, leaving entry points untested (high confidence)

The tests for loadExample and getExampleFiles now early-return when examples.length === 0, meaning they don't actually test the happy path. Per guideline #5 (Cover Every User Entry Point), each entry point should have at least one test that proves it works.

Suggested fix: Instead of early-returning, create test fixtures (mock examples directory with _meta.json) in a temp directory to ensure these functions are actually tested. Use beforeEach/afterEach to set up and tear down test fixtures.

Suggested change

	if (examples.length === 0) {
	// Skip test when no examples exist
	return;
	}
	import { mkdirSync, rmSync, writeFileSync } from 'node:fs';
	import { tmpdir } from 'node:os';
	import { beforeEach, afterEach } from 'vitest';
	let tempDir: string;
	beforeEach(() => {
	tempDir = join(tmpdir(), `warden-test-${Date.now()}`);
	mkdirSync(join(tempDir, 'test-example'), { recursive: true });
	writeFileSync(join(tempDir, 'test-example', '_meta.json'), JSON.stringify({
	skill: 'test-skill',
	description: 'Test example',
	expected: [{ severity: 'medium', pattern: 'test' }]
	}));
	writeFileSync(join(tempDir, 'test-example', 'sample.ts'), 'const x = 1;');
	});
	afterEach(() => {
	rmSync(tempDir, { recursive: true, force: true });
	});
	const meta = loadExample(join(tempDir, 'test-example'));

---

_{warden: testing-guidelines}

[sentry-warden]

🟠 Missing test for public entry point 'discoverAllSkills' (high confidence)

The exported function discoverAllSkills in src/skills/index.ts is a public API entry point but has no test coverage. Testing guidelines require at least one basic test for each user entry point.

Suggested fix: Add a test for the discoverAllSkills function covering its happy path behavior

Suggested change

	SKILL_DIRECTORIES,
	discoverAllSkills,
	describe('discoverAllSkills', () => {
	it('discovers skills from conventional directories', async () => {
	const repoRoot = new URL('../..', import.meta.url).pathname;
	const skills = await discoverAllSkills(repoRoot);
	expect(skills.size).toBeGreaterThan(0);
	const testingGuidelines = skills.get('testing-guidelines');
	expect(testingGuidelines).toBeDefined();
	expect(testingGuidelines?.directory).toMatch(/\.\/(warden|agents|claude)\/skills/);
	});
	});

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_{warden: testing-guidelines}