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Agent Skills

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Superpowers

A complete software development methodology for coding agents, built on composable skills. Enforces spec-driven design, TDD, systematic debugging, code review, and subagent-driven development across Claude Code, Codex, Cursor, Kimi Code, OpenCode, Antigravity, GitHub Copilot CLI, and Pi. [Intro](docs/superpowers/README.md)

Free

NVIDIA/SkillSpector

Open-source security scanner for AI agent skills from NVIDIA. Scans skills (from Git repos, URLs, zip files, or directories) for risky patterns including prompt injection, data exfiltration, privilege escalation, malicious code, supply-chain issues, and MCP tool poisoning. Uses static analysis plus optional LLM-based semantic review and can be used in CI/CD or as an MCP server.

Free

phuryn/pm-skills

Product-management skills marketplace for Claude Code and Claude Cowork, providing PM skills and chained workflows across discovery, strategy, execution, launch, growth, and shipping AI-built code.

Free

addyosmani/agent-skills

A curated library of 20+ engineering workflow skills for AI coding assistants. Standardizes the software development lifecycle from requirements through shipping, with 7 built-in commands: /spec, /plan, /build, /test, /ship, etc. Built by Google Gemini team lead Addy Osmani. Compatible with Claude Code, Gemini CLI, Codex, and Cursor.

Free

BrowserAct Skills

Directory of reusable AI-agent skills and browser automation workflows for research, ecommerce, social/search extraction, video platforms, maps, and operational automation.

Free