{"data":{"slug":"agent-skills","name":"Agent Skills (Addy Osmani)","tagline":"Production lifecycle skills — /spec /plan /build /test /review /ship","category":"agents","categoryName":"AI Agents","url":"https://skills.addy.ie","github":"https://github.com/addyosmani/agent-skills","pricing":"open-source","hook":"Addy’s Agent Skills encode senior-engineer gates so coding agents cannot skip the boring parts that keep software shippable.","whatsGood":"MIT (addyosmani/agent-skills). ~25 structured SKILL.md workflows with anti-rationalization tables and verification exits, plus slash commands mapping define→plan→build→verify→review→ship. `npx skills add addyosmani/agent-skills` hits 70+ agents; Claude/Codex/Cursor/Gemini/Antigravity adapters documented. Draws explicitly from Google eng practices (Hyrum’s Law, Beyoncé Rule, change sizing). Docs and site at skills.addy.ie. ★~96k.","theCatch":"Per-skill installs can miss shared `references/` checklists — prefer whole-repo or full pack install. Still markdown discipline, not a runtime that forces compliance if the host ignores skills. Vs Superpowers (session-hijacking SDLC methodology) and knowledge-work-plugins (Anthropic official packs): this is the Google-flavored lifecycle library you pick skill-by-skill, not an automatic brainstorm→subagent loop.","verdict":"MIT production skill pack. Reach for it when you want explicit /spec→/ship gates across many harnesses.","addedAt":"2026-09-17","featured":false,"domain":"AI Agents","subSpecialty":"Agents","subcategory":"Skills","tags":["self-host","permissive","coding-agents","skills","testing","active","fast-stars"],"capabilities":[],"surfaces":["Self-host"],"ecosystem":["Multi-platform"],"licenseModel":"OSS/MIT","githubStars":108281,"starsPerWeek":3074,"access":"free","archived":false,"repo":{"createdAt":"2026-02-15","pushedAt":"2026-10-13","license":"MIT","archived":false,"checkedAt":"2026-10-19"}},"related":[{"slug":"claude-code","name":"Claude Code","tagline":"Terminal-first coding agent with deep repository context"},{"slug":"cursor","name":"Cursor","tagline":"The AI-first code editor that understands your codebase"},{"slug":"devin","name":"Devin","tagline":"Autonomous AI engineer for defined engineering tasks"},{"slug":"stagehand","name":"Stagehand","tagline":"AI-native browser automation that mixes code and natural language"},{"slug":"browser-use","name":"Browser Use","tagline":"Open-source framework for LLM-driven browser agents"}],"links":{"self":"/api/gems/agent-skills","html":"/gems/agent-skills","markdown":"/gems/agent-skills.md","category":"/api/gems?category=agents","categoryPage":"/stacks/agents"}}