How do I install the TS Library skill?

Run npx skillmds@latest add chonsong/ts-library in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is TS Library safe to use?

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Which AI agents work with TS Library?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is TS Library free to use?

Yes. Installing skills from SkillMD is free. This skill is licensed under MIT.

Who published TS Library?

chonsong (@chonsong) published this skill. Their other Agent Skills are listed on their SkillMD profile.

TS Library by chonsong — Agent Skill

Name: TS Library
Author: chonsong

TS Library

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.

chonsong 87431bf 10 files · 35.1 KB Updated Sep 17, 2026

File contents

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
Package exports	references/package-exports.md
tsconfig options	references/typescript-config.md
Build configuration	references/build-tooling.md
API design patterns	references/api-design.md
Type inference tricks	references/type-patterns.md
Testing setup	references/testing.md
Release workflow	references/release.md
CI/CD setup	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

---name: ts-librarydescription: 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 DevelopmentPatterns 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_

Frequently asked questions