Is the Antfu skill free?

Yes. The skill itself is free from antfu/skills. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Antfu SkillProof Score?

9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.

How do I install Antfu?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Antfu with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Antfu

Anthony Fu's opinionated ESLint, TypeScript, and monorepo conventions for JS/TS projects.

by antfu · antfu/skills

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.6/10
Tested: Jul 10, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 0e78e96

For a new TS library setup it surfaced concrete opinions a generic answer wouldn't reach alone: a pure-ESM build config, a one-line ESLint setup, and an exact git-hooks config, versus generic husky boilerplate.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 5/5

What Antfu does

Applies Anthony Fu's tooling conventions to JavaScript/TypeScript projects: @antfu/eslint-config setup, strict tsconfig, ni/nr/nlx commands, simple-git-hooks + lint-staged, pnpm catalogs, and pure-ESM library publishing via tsdown. Triggers when scaffolding a new JS/TS project, configuring lint/monorepo/publishing, or when the user explicitly wants Anthony Fu's style; does not trigger for non-JS/TS tooling or plain code review.

How to install Antfu

git clone https://github.com/antfu/skills
cd skills
mkdir -p ~/.claude/skills
cp -r skills/antfu ~/.claude/skills/antfu

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Antfu

/antfu Anthony Fu's opinionated ESLint, TypeScript, and monorepo conventions for JS/TS projects.

It also activates on plain-language prompts like these:

Set up @antfu/eslint-config and strict tsconfig for this TS project
Configure simple-git-hooks and lint-staged the Anthony Fu way
Publish this library as pure ESM using tsdown

Frequently asked questions

Is the Antfu skill free?: Yes. The skill itself is free from antfu/skills. SkillProof publishes the install command and an independent test verdict at no cost.
Does Antfu work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 10, 2026. Verdict: Tested · Works. For a new TS library setup it surfaced concrete opinions a generic answer wouldn't reach alone: a pure-ESM build config, a one-line ESLint setup, and an exact git-hooks config, versus generic husky boilerplate.
What is the Antfu SkillProof Score?: 9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.
How do I install Antfu?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Antfu with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.