antfu

antfu is an open-source productivity skill for Claude Code and compatible agents, published by antfu. Its author describes it as: “Anthony Fu's opinionated tooling and conventions for JavaScript/TypeScript projects. Use when setting up new projects, configuring ESLint/Prettier alternatives, monorepos, library publishing, or when the user mentions…”. The project has 5.8k stars on GitHub and is available under the MIT license. Add it to your setup with `git clone https://github.com/antfu/skills ~/.claude/skills/antfu`.

What antfu does

- **Single responsibility**: Each source file should have a clear, focused scope/purpose - **Split large files**: Break files when they become large or handle too many concerns - **Type separation**: Always separate types and interfaces into `types.ts` or `types/*.ts` - **Constants extraction**: Move constants to a dedicated `constants.ts` file

Installation

Add antfu to your agent with:

git clone https://github.com/antfu/skills ~/.claude/skills/antfu

Always review a skill's source before installing it. This command comes from the skill's public repository; the linked repo is the source of truth for exact setup steps.

What's inside

The SKILL.md for antfu is organised into these sections:

• Coding Practices
• Code Organization
• Runtime Environment
• TypeScript
• Explicitness
• Comments
• Testing (Vitest)
• Tooling Choices
• @antfu/ni Commands
• Checking npm Package Versions
• TypeScript Config
• ESLint Setup

When to use it

Reach for antfu when you want productivity help from your agent without writing the same instructions every session. Load the skill and the agent picks it up automatically for relevant tasks.

Strengths

• Clear MIT license — safe to read and adapt
• Ships in antfu/skills, an established project with 5,770 GitHub stars
• Actively maintained (recent commits)

Topics

Frequently asked questions

What does antfu do?

Anthony Fu's opinionated tooling and conventions for JavaScript/TypeScript projects. Use when setting up new projects, configuring ESLint/Prettier alternatives, monorepos, library publishing, or when the user mentions Anthony Fu's preferences.

How do I install antfu?

Run git clone https://github.com/antfu/skills ~/.claude/skills/antfu in your agent, then reload your skills. Review the source at https://github.com/antfu/skills before installing.

Is antfu free to use?

Yes. antfu is free and open source under the MIT license, so you can read, run, and adapt it within that license's terms.

Where does antfu come from?

antfu ships inside antfu/skills, a repository that contains 19 catalogued skills in total. The repository's 5,770 GitHub stars apply to that whole collection, not to this skill on its own.