Addy Osmani · 2026-06-11 · notable
agent-skills 0.6.2 — Addy Osmani adds /build and /webperf for AI coding agents
Addy Osmani's MIT-licensed agent-skills bundle hits v0.6.2 with a one-pass /build command, a /webperf web-performance auditor, an observability skill, native Antigravity CLI support, and hardened security skills. The repo now sits at 56.7k stars.
Addy Osmani's open-source agent-skills bundle hits v0.6.2 with new slash commands and hardened security skills.
Key specs
| Version | v0.6.2 |
|---|---|
| GitHub stars | 56,720 |
| Skills | 24 |
What is it?
agent-skills is a collection of 24 structured workflows you load into a coding agent like Claude Code, Cursor, Codex, Gemini CLI, or Antigravity. Each skill is a Markdown file that encodes a senior engineer's checklist — TDD, security review, performance audit, observability — so the agent follows the same steps a careful human would.
How does it work?
Skills live as MIT-licensed Markdown plus a small set of slash commands. You add the repo to your agent's marketplace and trigger them with /spec, /plan, /build, /test, /review, /code-simplify, /ship, or /webperf. v0.6.2 adds the /build one-pass plan-and-implement command, a web-performance auditor persona, an observability-and-instrumentation skill, native Antigravity CLI (agy) support, and stronger security skills covering threat modeling, SSRF, supply-chain risks, and LLM-specific issues.
Why does it matter?
Coding agents will skip tests or ship a quick-and-dirty patch unless you stop them. agent-skills puts that brake in front of the model: ship gates, security checks, and performance audits you trigger with a slash command. 56.7k stars and 2,660 added today on GitHub trending say plenty of teams want that brake.
Who is it for?
engineers using Claude Code, Cursor, Codex, Gemini CLI, or Antigravity
Try it
In Claude Code: /plugin marketplace add addyosmani/agent-skills