What are the best free AI tools for coding agent skills?

Hermes Agent: open agent that grows its own skills, Superpowers: plan, test and debug before coding, Matt Pocock's engineering skills, Anthropic official skills (frontend-design, docs, slides), Caveman: cut your agent's token use by talking short

Coding Agent Skills

Free skill packs for Codex, Claude Code and friends.

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Hermes Agent: open agent that grows its own skills

Model-agnostic agent with cross-session memory that writes new skills from finished tasks.

Hermes Agent★ 253.8k

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Superpowers: plan, test and debug before coding

A skills framework that makes agents brainstorm, plan, test and debug systematically.

Claude Code +1★ 299.2k

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Matt Pocock's engineering skills

Real engineering skills from a well-known TypeScript educator's own .agents folder.

Claude Code +1★ 291.4k

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Anthropic official skills (frontend-design, docs, slides)

The official skills repo: frontend-design, docx, pptx, xlsx and more.

Claude Code★ 181.2k

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Caveman: cut your agent's token use by talking short

A skill plus proxy that makes coding agents reply in terse 'caveman' style, cutting tokens while keeping code exact.

Claude Code +1★ 112k

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Addy Osmani's production-grade agent skills

Production engineering skills (perf, testing, reviews) for coding agents.

Claude Code★ 106.7k

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Impeccable: a design language for AI-built frontends

One skill, 24 commands and 59 automatic checks that catch the tell-tale signs of AI-generated web design.

Claude Code +2★ 81.4k

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OpenSpec: agree on the spec, then build

Spec-driven development so you and the agent align on requirements before code changes.

Claude Code +1★ 72k

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Emil Kowalski's UI craft skills

Interface and animation guidance from a well-known design engineer, packaged so agents build smoother, more polished UIs.

Claude Code +2★ 46.4k

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agent-browser: a browser CLI built for AI agents

Lets an agent open pages, click, type and screenshot from the command line, for testing and web tasks.

Claude Code +1★ 44k

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A big library of Claude Code and Codex skills

Hundreds of ready skills, agents and commands for engineering, marketing and product work.

Claude Code +1★ 28.2k

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Vercel's official agent skills

Vercel's own skill pack: React and Next.js best practices, deployment and web design review for coding agents.

Claude Code +2★ 32.5k

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OpenAI skills catalog for Codex

The official catalog of installable Codex skills.

Codex★ 28.1k

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Google agents-cli: build and deploy agents on Gemini

A CLI plus skills that teach your coding assistant to create, evaluate and deploy AI agents on Google Cloud.

Claude Code +2★ 6.1k