name: antfu
description: Anthony Fu's {Opinionated} preferences and best practices for web development
metadata:
author: Anthony Fu
version: "2026.1.28"

Anthony Fu's Preferences

This skill covers Anthony Fu's preferred tooling, configurations, and best practices for web development. This skill is opinionated.

Quick Summary

Core Stack

Package Manager (pnpm)

Use pnpm as the package manager.

For monorepo setups, use pnpm workspaces:

# pnpm-workspace.yaml
packages:
  - 'packages/*'

Use pnpm named catalogs in pnpm-workspace.yaml to manage dependency versions:

Catalog names are not limited to the above and can be adjusted based on needs. Avoid using default catalog.

@antfu/ni

Use @antfu/ni for unified package manager commands. It auto-detects the package manager (pnpm/npm/yarn/bun) based on lockfile.

Install globally with pnpm i -g @antfu/ni if the commands are not found.

TypeScript (Strict Mode)

Always use TypeScript with strict mode enabled.

{
  "compilerOptions": {
    "target": "ESNext",
    "module": "ESNext",
    "moduleResolution": "bundler",
    "strict": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true
  }
}

ESM (ECMAScript Modules)

Always work in ESM mode. Set "type": "module" in package.json.

Code Quality

ESLint (@antfu/eslint-config)

Use @antfu/eslint-config for both formatting and linting. This eliminates the need for Prettier.

Create eslint.config.js with // @ts-check comment:

// @ts-check
import antfu from '@antfu/eslint-config'

export default antfu()

Add script to package.json:

{
  "scripts": {
    "lint": "eslint ."
  }
}

When getting linting errors, try to fix them with nr lint --fix. Don't add lint:fix script.

Git Hooks (simple-git-hooks + lint-staged)

Use simple-git-hooks with lint-staged for pre-commit linting:

{
  "simple-git-hooks": {
    "pre-commit": "pnpm i --frozen-lockfile --ignore-scripts --offline && npx lint-staged"
  },
  "lint-staged": {
    "*": "eslint --fix"
  },
  "scripts": {
    "prepare": "npx simple-git-hooks"
  }
}

Unit Testing (Vitest)

Use Vitest for unit testing.

{
  "scripts": {
    "test": "vitest"
  }
}

Conventions:

• Place test files next to source files: foo.ts → foo.test.ts (same directory)
• High-level tests go in tests/ directory in each package
• Use describe and it API (not test)
• Use expect API for assertions
• Use assert only for TypeScript null assertions
• Use toMatchSnapshot for complex output assertions
• Use toMatchFileSnapshot with explicit file path and extension for language-specific output (exclude those files from linting)

Project Setup

Publishing (Library Projects)

For library projects, publish through GitHub Releases triggered by bumpp:

{
  "scripts": {
    "release": "bumpp -r"
  }
}

Documentation (VitePress)

Use VitePress for documentation. Place docs under docs/ directory.

docs/
├── .vitepress/
│   └── config.ts
├── index.md
└── guide/
    └── getting-started.md

Add script to package.json:

{
  "scripts": {
    "docs:dev": "vitepress dev docs",
    "docs:build": "vitepress build docs"
  }
}

References

Project Setup

Development