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/tsdown/references/option-cleaning.md

@@ -0,0 +1,275 @@
+# Output Directory Cleaning
+
+Control how the output directory is cleaned before builds.
+
+## Overview
+
+By default, tsdown **cleans the output directory** before each build to remove stale files from previous builds.
+
+## Basic Usage
+
+### CLI
+
+```bash
+# Clean enabled (default)
+tsdown
+
+# Disable cleaning
+tsdown --no-clean
+```
+
+### Config File
+
+```ts
+export default defineConfig({
+  entry: ['src/index.ts'],
+  clean: true,  // Default
+})
+```
+
+## Behavior
+
+### With Cleaning (Default)
+
+Before each build:
+1. All files in `outDir` are removed
+2. Fresh build starts with empty directory
+3. Only current build outputs remain
+
+**Benefits:**
+- No stale files
+- Predictable output
+- Clean slate each build
+
+### Without Cleaning
+
+Build outputs are added to existing files:
+
+```ts
+export default defineConfig({
+  clean: false,
+})
+```
+
+**Use when:**
+- Multiple builds to same directory
+- Incremental builds
+- Preserving other files
+- Watch mode (faster rebuilds)
+
+## Common Patterns
+
+### Production Build
+
+```ts
+export default defineConfig({
+  entry: ['src/index.ts'],
+  format: ['esm', 'cjs'],
+  clean: true,  // Ensure clean output
+  minify: true,
+})
+```
+
+### Development Mode
+
+```ts
+export default defineConfig((options) => ({
+  entry: ['src/index.ts'],
+  clean: !options.watch,  // Don't clean in watch mode
+  sourcemap: options.watch,
+}))
+```
+
+### Multiple Builds
+
+```ts
+export default defineConfig([
+  {
+    entry: ['src/index.ts'],
+    outDir: 'dist',
+    clean: true,  // Clean once
+  },
+  {
+    entry: ['src/cli.ts'],
+    outDir: 'dist',
+    clean: false,  // Don't clean, add to same dir
+  },
+])
+```
+
+### Monorepo Package
+
+```ts
+export default defineConfig({
+  workspace: 'packages/*',
+  entry: ['src/index.ts'],
+  clean: true,  // Clean each package's dist
+})
+```
+
+### Preserve Static Files
+
+```ts
+export default defineConfig({
+  entry: ['src/index.ts'],
+  clean: false,  // Keep manually added files
+  outDir: 'dist',
+})
+
+// Manually copy files first
+// Then run tsdown --no-clean
+```
+
+## Clean Patterns
+
+### Selective Cleaning
+
+```ts
+import { rmSync } from 'fs'
+
+export default defineConfig({
+  clean: false,  // Disable auto clean
+  hooks: {
+    'build:prepare': () => {
+      // Custom cleaning logic
+      rmSync('dist/*.js', { force: true })
+      // Keep other files
+    },
+  },
+})
+```
+
+### Clean Specific Directories
+
+```ts
+export default defineConfig({
+  clean: false,
+  hooks: {
+    'build:prepare': async () => {
+      const { rm } = await import('fs/promises')
+      // Only clean specific subdirectories
+      await rm('dist/esm', { recursive: true, force: true })
+      await rm('dist/cjs', { recursive: true, force: true })
+      // Keep dist/types
+    },
+  },
+})
+```
+
+## Watch Mode Behavior
+
+In watch mode, cleaning behavior is important:
+
+### Clean on First Build Only
+
+```ts
+export default defineConfig((options) => ({
+  entry: ['src/index.ts'],
+  watch: options.watch,
+  clean: !options.watch,  // Only clean initial build
+}))
+```
+
+**Result:**
+- First build: Clean
+- Subsequent rebuilds: Incremental
+
+### Always Clean
+
+```ts
+export default defineConfig({
+  watch: true,
+  clean: true,  // Clean every rebuild
+})
+```
+
+**Trade-off:** Slower rebuilds, but always fresh output.
+
+## Tips
+
+1. **Leave enabled** for production builds
+2. **Disable in watch mode** for faster rebuilds
+3. **Use multiple configs** carefully with cleaning
+4. **Custom clean logic** via hooks if needed
+5. **Be cautious** - cleaning removes ALL files in outDir
+6. **Test cleaning** - ensure no important files are lost
+
+## Troubleshooting
+
+### Important Files Deleted
+
+- Don't put non-build files in outDir
+- Use separate directory for static files
+- Disable cleaning and manage manually
+
+### Stale Files in Output
+
+- Enable cleaning: `clean: true`
+- Or manually remove before build
+
+### Slow Rebuilds in Watch
+
+- Disable cleaning in watch mode
+- Use incremental builds
+
+## CLI Examples
+
+```bash
+# Default (clean enabled)
+tsdown
+
+# Disable cleaning
+tsdown --no-clean
+
+# Watch mode without cleaning
+tsdown --watch --no-clean
+
+# Multiple formats with cleaning
+tsdown --format esm,cjs --clean
+```
+
+## Examples
+
+### Safe Production Build
+
+```bash
+# Clean before build
+rm -rf dist
+tsdown --clean
+```
+
+### Incremental Development
+
+```ts
+export default defineConfig({
+  entry: ['src/index.ts'],
+  watch: true,
+  clean: false,  // Faster rebuilds
+  sourcemap: true,
+})
+```
+
+### Multi-Stage Build
+
+```ts
+// Stage 1: Clean and build main
+export default defineConfig([
+  {
+    entry: ['src/index.ts'],
+    outDir: 'dist',
+    clean: true,
+  },
+  {
+    entry: ['src/utils.ts'],
+    outDir: 'dist',
+    clean: false,  // Add to same directory
+  },
+])
+```
+
+## Related Options
+
+- [Output Directory](option-output-directory.md) - Configure outDir
+- [Watch Mode](option-watch-mode.md) - Development workflow
+- [Hooks](advanced-hooks.md) - Custom clean logic
+- [Entry](option-entry.md) - Entry points