Google Chrome’s Addy Osmani open-sourced agent-skills, and GitHub trending noticed fast — over 1,100 stars in a single day, 8,600+ total. It’s not a model or an app. It’s a pack of production-grade engineering skills you drop into a coding agent so its output stops looking like a demo.
What it actually is
The problem it fixes: agents love to jump straight to code and skip the boring parts. agent-skills forces the full lifecycle — Define → Plan → Build → Verify → Review → Ship. Each skill ships with an “anti-rationalization” table that shuts down the excuses agents use to dodge work (“I’ll add tests later”), plus hard evidence gates: no passing tests, no ship.
How you plug it in
It’s a skills repo (MIT), driven by slash commands — /spec, /plan, /build, /test, /review, /ship. Point it at Claude Code, Codex, Cursor, Gemini CLI, or Copilot and the agent inherits real engineering discipline. Typical use: hand a coding agent a feature and get senior-level rigor instead of confident garbage. Name recognition plus the “give agents skills” wave is why this one landed harder than most.
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