Marketplace antfu

Anthony Fu's {Opinionated} preferences and best practices for web development

install

source · Clone the upstream repo

git clone https://github.com/aiskillstore/marketplace

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/aiskillstore/marketplace "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/antfu/antfu" ~/.claude/skills/aiskillstore-marketplace-antfu && rm -rf "$T"

manifest: skills/antfu/antfu/SKILL.md

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

Category	Preference
Package Manager	pnpm
Language	TypeScript (strict mode)
Module System	ESM ( `"type": "module"` )
Linting & Formatting	@antfu/eslint-config (no Prettier)
Testing	Vitest
Git Hooks	simple-git-hooks + lint-staged
Documentation	VitePress (in `docs/` )

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	Purpose
`prod`	Production dependencies
`inlined`	Dependencies inlined by bundler
`dev`	Development tools (linter, bundler, testing, dev-server)
`frontend`	Frontend libraries bundled into frontend

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.

Command	Description
`ni`	Install dependencies
`ni <pkg>`	Add dependency
`ni -D <pkg>`	Add dev dependency
`nr <script>`	Run script
`nu`	Upgrade dependencies
`nun <pkg>`	Uninstall dependency
`nci`	Clean install (like `pnpm i --frozen-lockfile` )
`nlx <pkg>`	Execute package (like `npx` )

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"

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

Topic	Description	Reference
@antfu/eslint-config	ESLint flat config for formatting and linting	antfu-eslint-config
GitHub Actions	Preferred workflows using sxzz/workflows	github-actions
.gitignore	Preferred .gitignore for JS/TS projects	gitignore
VS Code Extensions	Recommended extensions for development	vscode-extensions

Development

Topic	Description	Reference
App Development	Preferences for Vue/Vite/Nuxt/UnoCSS web applications	app-development
Library Development	Preferences for bundling and publishing TypeScript libraries	library-development
Monorepo	pnpm workspaces, centralized alias, Turborepo	monorepo