Add 260+ Claude Code skills from skills.sh

Complete collection of AI agent skills including:
- Frontend Development (Vue, React, Next.js, Three.js)
- Backend Development (NestJS, FastAPI, Node.js)
- Mobile Development (React Native, Expo)
- Testing (E2E, frontend, webapp)
- DevOps (GitHub Actions, CI/CD)
- Marketing (SEO, copywriting, analytics)
- Security (binary analysis, vulnerability scanning)
- And many more...

Synchronized from: https://skills.sh/

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

ts-library/skill.md

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+---
+name: ts-library
+description: Use when authoring TypeScript libraries - covers project setup, package exports, build tooling (tsdown/unbuild), API design patterns, type inference tricks, testing, and release workflows. Patterns extracted from 20+ high-quality ecosystem libraries.
+license: MIT
+---
+
+# TypeScript Library Development
+
+Patterns for authoring high-quality TypeScript libraries, extracted from studying unocss, shiki, unplugin, vite, vitest, vueuse, zod, trpc, drizzle-orm, and more.
+
+## When to Use
+
+- Starting a new TypeScript library (single or monorepo)
+- Setting up package.json exports for dual CJS/ESM
+- Configuring tsconfig for library development
+- Choosing build tools (tsdown, unbuild)
+- Designing type-safe APIs (builder, factory, plugin patterns)
+- Writing advanced TypeScript types
+- Setting up vitest for library testing
+- Configuring release workflow and CI
+
+**For Nuxt module development:** use `nuxt-modules` skill
+
+## Quick Reference
+
+| Working on...         | Load file                                                          |
+| --------------------- | ------------------------------------------------------------------ |
+| New project setup     | [references/project-setup.md](references/project-setup.md)         |
+| Package exports       | [references/package-exports.md](references/package-exports.md)     |
+| tsconfig options      | [references/typescript-config.md](references/typescript-config.md) |
+| Build configuration   | [references/build-tooling.md](references/build-tooling.md)         |
+| API design patterns   | [references/api-design.md](references/api-design.md)               |
+| Type inference tricks | [references/type-patterns.md](references/type-patterns.md)         |
+| Testing setup         | [references/testing.md](references/testing.md)                     |
+| Release workflow      | [references/release.md](references/release.md)                     |
+| CI/CD setup           | [references/ci-workflows.md](references/ci-workflows.md)           |
+
+## Key Principles
+
+- ESM-first: `"type": "module"` with `.mjs` outputs
+- Dual format: always support both CJS and ESM consumers
+- `moduleResolution: "Bundler"` for modern TypeScript
+- tsdown for most builds, unbuild for complex cases
+- Smart defaults: detect environment, don't force config
+- Tree-shakeable: lazy getters, proper `sideEffects: false`
+
+_Token efficiency: Main skill ~300 tokens, each reference ~800-1200 tokens_