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agent-skills

by addyosmani87.8kJavaScriptUpdated 2026-08-14

Production-grade engineering skills for AI coding agents.

Claude CodeCursorCodexGitHub CopilotWindsurfGemini CLI

Agent Skills is a comprehensive collection of 24 production-grade engineering workflows designed to guide AI coding agents through the complete software development lifecycle. Created by Addy Osmani, it packages senior-level best practices, quality gates, and structured processes into reusable skill modules that agents can follow consistently. The pack covers everything from requirements gathering and spec writing to test-driven development, code review, security hardening, and production deployment, ensuring AI agents apply the same discipline that experienced engineers bring to production code.

Key Features

24 structured workflow skills covering define, plan, build, verify, review, and ship phases of development
8 slash commands (/spec, /plan, /build, /test, /review, /webperf, /code-simplify, /ship) that map to development lifecycle stages
Anti-rationalization tables in each skill that counter common excuses agents use to skip critical steps
4 specialist agent personas (code reviewer, test engineer, security auditor, web performance auditor) for targeted reviews
Works with 70+ AI coding agents including Claude Code, Cursor, Codex, GitHub Copilot, Windsurf, and Gemini CLI
Built-in verification gates requiring concrete evidence (passing tests, build output, runtime data) rather than assertions
Embedded Google engineering principles including Hyrum's Law, Beyonce Rule, test pyramid, and trunk-based development
One-command installation via npx skills CLI or native integrations for major AI coding tools

Use Cases

  • 01Enforcing test-driven development and code review standards across AI-generated code contributions
  • 02Guiding AI agents through full-stack feature development from specification to production deployment
  • 03Implementing security hardening and OWASP Top 10 prevention in AI-assisted codebases
  • 04Running automated web performance audits and Core Web Vitals assessments during development
  • 05Conducting five-axis code quality reviews before merging AI-generated pull requests
  • 06Managing API design, deprecation workflows, and observability instrumentation with structured agent guidance

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agent-skills — FAQ

What is Agent Skills?+

Agent Skills is an open-source collection of 24 production-grade engineering workflow modules that teach AI coding agents to follow senior-level software development practices throughout the entire development lifecycle, from specification writing to production deployment.

How do I install Agent Skills?+

The fastest method is npx skills add addyosmani/agent-skills which works with 70+ agents. You can also install natively in Claude Code via the /plugin marketplace, configure Cursor using .cursor/skills/, or use tool-specific commands for Codex, Gemini CLI, Windsurf, and others documented in the repository.

Which AI coding agents support Agent Skills?+

Agent Skills works with Claude Code, Cursor, Codex, GitHub Copilot, Windsurf, Cline, Gemini CLI, Antigravity CLI, Command Code, Kiro IDE, OpenCode, and any agent that accepts Markdown instruction files or system prompts.

Do I need API keys or paid accounts to use Agent Skills?+

No API keys are required. Agent Skills are plain Markdown workflow files that integrate directly into your AI coding agent; you only need whatever access your chosen agent requires.

Is Agent Skills free?+

Yes, Agent Skills is open source and released under the MIT license, allowing free use in personal projects, team workflows, and commercial tools.

What is the /build auto command?+

/build auto generates a complete implementation plan from a spec and executes every task autonomously after a single approval, while still maintaining test-driven verification and atomic commits for each task.

How do I install agent-skills?+

Open the source repository on GitHub and follow its README. agent-skills is a skill — MCP Agents Market links you directly to the official repo.

Is agent-skills free?+

agent-skills is an open-source project hosted on GitHub. Check the repository for its license and any usage requirements.

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