ts-library

Use when authoring TypeScript libraries or npm packages - covers project setup, package.json exports, build tooling (tsdown/unbuild), API design patterns, type inference tricks, testing, and publishing to npm. Use when bundling, configuring dual CJS/ESM output, or setting up release workflows.

Install with Tessl CLI

npx tessl i github:onmax/nuxt-skills --skill ts-library

What are skills?

100

Review — 100%

Does it follow best practices?

Validation — 11 / 11 Passed

Validation for skill structure

SKILL.md

Review

Evals

Evaluation results

100%

52%

Bootstrap a TypeScript Utility Library

New library project scaffolding

Criteria

Without context

With context

pnpm scripts

60%

100%

prepublishOnly script

100%

ESM-first type:module

100%

Dual CJS/ESM exports

57%

100%

Types in .d.mts

100%

sideEffects false

100%

files dist only

100%

tsconfig moduleResolution Bundler

100%

isolatedDeclarations true

100%

verbatimModuleSyntax true

100%

noEmit true

100%

tsdown dual format

100%

tsdown dts and clean

100%

antfu ESLint config

100%

antfu type lib

100%

vitest test location

100%

Without context: $0.3451 · 1m 17s · 18 turns · 67 in / 4,359 out tokens

With context: $0.7363 · 1m 36s · 35 turns · 31 in / 5,239 out tokens

94%

29%

Configure Package Exports for a Multi-Entry TypeScript Library

Package exports and build multi-entry

Criteria

Without context

With context

Three export entries

100%

Types .d.mts extension

100%

Types condition first

100%

Dual CJS/ESM per entry

75%

100%

sideEffects false

100%

files dist

100%

Legacy main/module/types fields

87%

100%

typesVersions fallback

100%

tsdown format esm+cjs

100%

tsdown dts enabled

100%

tsdown three entries

100%

type module

100%

package validation note

Without context: $0.2732 · 1m 3s · 13 turns · 13 in / 4,001 out tokens

With context: $0.3953 · 1m 14s · 21 turns · 17 in / 3,976 out tokens

100%

59%

Set Up Automated CI and Release Pipeline for a TypeScript Library

CI and release automation

Criteria

Without context

With context

pnpm/action-setup@v4

100%

setup-node cache pnpm

100%

CI separate jobs

100%

CI node version 22

100%

Release node version 24

100%

OIDC permission id-token write

100%

publish with --provenance

100%

wait-for-ci job

42%

100%

changelogithub in release

100%

repository field in package.json

100%

bumpp release script

100%

changelogen in release script

100%

No NPM_TOKEN

100%

concurrency cancel

100%

Without context: $0.4626 · 2m 27s · 13 turns · 14 in / 9,301 out tokens

With context: $0.5701 · 1m 32s · 27 turns · 156 in / 5,354 out tokens

Evaluated: 3 days ago
Agent: Claude Code

Table of Contents

Bootstrap a TypeScript Utility Library Configure Package Exports for a Multi-Entry TypeScript Library Set Up Automated CI and Release Pipeline for a TypeScript Library

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.