feat: Complete fleet — 94 skills across 10+ domains

Pulled ALL skills from 15 source repositories:
- anthropics/skills: 16 (docs, design, MCP, testing)
- obra/superpowers: 14 (TDD, debugging, agents, planning)
- coreyhaines31/marketingskills: 25 (marketing, CRO, SEO, growth)
- better-auth/skills: 5 (auth patterns)
- vercel-labs/agent-skills: 5 (React, design, Vercel)
- antfu/skills: 16 (Vue, Vite, Vitest, pnpm, Turborepo)
- Plus 13 individual skills from various repos

Mosaic Stack is not limited to coding — the Orchestrator and
subagents serve coding, business, design, marketing, writing,
logistics, analysis, and more.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/vitest/references/features-context.md

@@ -0,0 +1,238 @@
+---
+name: test-context-fixtures
+description: Test context, custom fixtures with test.extend
+---
+
+# Test Context & Fixtures
+
+## Built-in Context
+
+Every test receives context as first argument:
+
+```ts
+test('context', ({ task, expect, skip }) => {
+  console.log(task.name)  // Test name
+  expect(1).toBe(1)       // Context-bound expect
+  skip()                  // Skip test dynamically
+})
+```
+
+### Context Properties
+
+- `task` - Test metadata (name, file, etc.)
+- `expect` - Expect bound to this test (important for concurrent tests)
+- `skip(condition?, message?)` - Skip the test
+- `onTestFinished(fn)` - Cleanup after test
+- `onTestFailed(fn)` - Run on failure only
+
+## Custom Fixtures with test.extend
+
+Create reusable test utilities:
+
+```ts
+import { test as base } from 'vitest'
+
+// Define fixture types
+interface Fixtures {
+  db: Database
+  user: User
+}
+
+// Create extended test
+export const test = base.extend<Fixtures>({
+  // Fixture with setup/teardown
+  db: async ({}, use) => {
+    const db = await createDatabase()
+    await use(db)           // Provide to test
+    await db.close()        // Cleanup
+  },
+  
+  // Fixture depending on another fixture
+  user: async ({ db }, use) => {
+    const user = await db.createUser({ name: 'Test' })
+    await use(user)
+    await db.deleteUser(user.id)
+  },
+})
+```
+
+Using fixtures:
+
+```ts
+test('query user', async ({ db, user }) => {
+  const found = await db.findUser(user.id)
+  expect(found).toEqual(user)
+})
+```
+
+## Fixture Initialization
+
+Fixtures only initialize when accessed:
+
+```ts
+const test = base.extend({
+  expensive: async ({}, use) => {
+    console.log('initializing')  // Only runs if test uses it
+    await use('value')
+  },
+})
+
+test('no fixture', () => {})           // expensive not called
+test('uses fixture', ({ expensive }) => {}) // expensive called
+```
+
+## Auto Fixtures
+
+Run fixture for every test:
+
+```ts
+const test = base.extend({
+  setup: [
+    async ({}, use) => {
+      await globalSetup()
+      await use()
+      await globalTeardown()
+    },
+    { auto: true }  // Always run
+  ],
+})
+```
+
+## Scoped Fixtures
+
+### File Scope
+
+Initialize once per file:
+
+```ts
+const test = base.extend({
+  connection: [
+    async ({}, use) => {
+      const conn = await connect()
+      await use(conn)
+      await conn.close()
+    },
+    { scope: 'file' }
+  ],
+})
+```
+
+### Worker Scope
+
+Initialize once per worker:
+
+```ts
+const test = base.extend({
+  sharedResource: [
+    async ({}, use) => {
+      await use(globalResource)
+    },
+    { scope: 'worker' }
+  ],
+})
+```
+
+## Injected Fixtures (from Config)
+
+Override fixtures per project:
+
+```ts
+// test file
+const test = base.extend({
+  apiUrl: ['/default', { injected: true }],
+})
+
+// vitest.config.ts
+defineConfig({
+  test: {
+    projects: [
+      {
+        test: {
+          name: 'prod',
+          provide: { apiUrl: 'https://api.prod.com' },
+        },
+      },
+    ],
+  },
+})
+```
+
+## Scoped Values per Suite
+
+Override fixture for specific suite:
+
+```ts
+const test = base.extend({
+  environment: 'development',
+})
+
+describe('production tests', () => {
+  test.scoped({ environment: 'production' })
+  
+  test('uses production', ({ environment }) => {
+    expect(environment).toBe('production')
+  })
+})
+
+test('uses default', ({ environment }) => {
+  expect(environment).toBe('development')
+})
+```
+
+## Extended Test Hooks
+
+Type-aware hooks with fixtures:
+
+```ts
+const test = base.extend<{ db: Database }>({
+  db: async ({}, use) => {
+    const db = await createDb()
+    await use(db)
+    await db.close()
+  },
+})
+
+// Hooks know about fixtures
+test.beforeEach(({ db }) => {
+  db.seed()
+})
+
+test.afterEach(({ db }) => {
+  db.clear()
+})
+```
+
+## Composing Fixtures
+
+Extend from another extended test:
+
+```ts
+// base-test.ts
+export const test = base.extend<{ db: Database }>({
+  db: async ({}, use) => { /* ... */ },
+})
+
+// admin-test.ts
+import { test as dbTest } from './base-test'
+
+export const test = dbTest.extend<{ admin: User }>({
+  admin: async ({ db }, use) => {
+    const admin = await db.createAdmin()
+    await use(admin)
+  },
+})
+```
+
+## Key Points
+
+- Use `{ }` destructuring to access fixtures
+- Fixtures are lazy - only initialize when accessed
+- Return cleanup function from fixtures
+- Use `{ auto: true }` for setup fixtures
+- Use `{ scope: 'file' }` for expensive shared resources
+- Fixtures compose - extend from extended tests
+
+<!-- 
+Source references:
+- https://vitest.dev/guide/test-context.html
+-->