hdkiller/ts-library
.gemini/skills/ts-library/SKILL.md
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.
$ install --global
skillsauthnpx skillsauth add hdkiller/coach ts-libraryInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
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Clean
TrivyContainer and dependency vulnerability scanner
95%
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SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
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Socket.devSupply chain security analysis
50%
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VirusTotalMulti-engine malware detection
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CrowdStrikeAdvanced threat intelligence
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OSV-ScannerOpen Source Vulnerability database check
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OWASP Dep-Check
50%
Last scanned: Apr 5, 2026, 5:07 PM301.1s10 files scanned
SKILL.md
- 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 | | 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.mjsoutputs - 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
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