Agent Skills Directory: Open-Source SKILL.md Skills
Find open-source agent skills for Claude Code, Codex, Gemini CLI and GitHub Copilot. Compare skills by GitHub stars and recent activity, see what each skill can touch, and read a dated scan report where one has run. Every skill here is a public GitHub repository with a SKILL.md file.
Works with Claude Code, Claude.ai, Codex, Gemini CLI, GitHub Copilot in VS Code, Cursor and other agents that follow the open Agent Skills specification.
Claude Code Rails Upgrade Skill
🤖 The one and only Claude Code Skill to Upgrade Rails by FastRuby.io -- Based on 60,000 dev/hours of experience upgrading Rails from 2.3 all the way to 8.1. Dual boot your Rails application and gradually upgrade one minor version at a time. 🚀
Agent Skills Guard
一款提供Agent Skills安全扫描和可视化管理的桌面应用 | A desktop application that provides security scanning and visual management for Agent Skills.
Robotics Agent Skills
Agent skills that make AI coding assistants write production-grade robotics software. ROS1, ROS2, design patterns, SOLID principles, and testing — for Claude Code, Cursor, Copilot, and any SKILL.md-compatible agent.
Agent Skills
AI agent skills for TestMu AI (Formerly LambdaTest).
Container
Persistent Linux workspaces for agentic development.
DailyBrief
AI 每日新闻简报 · GitHub 热门 + X 热门文章 + 行情技术分析 · 23 个数据源聚合 + LLM 中文摘要 · 本地或 GitHub Actions 部署
Open Code Review
AI-powered multi-agent code review. Simulates a customizable team of Engineers performing code review with built-in discourse.
DDC Skills For AI Agents In Construction
221 AI skills for construction: BIM analysis, cost estimation, scheduling, document control, and automation with Claude Code
Rederive
Learn a codebase by re-deriving its design decisions yourself. A Claude Code skill.
Story Skills
Agent Skills for end-to-end story writing in markdown, packaged as Codex and Claude Code plugins.
Sopify
Resumable, traceable AI coding — plans, handoffs, and evidence stay with the repo across hosts.
Agent Skills Discovery Rfc
A mechanism for discovering Agent Skills using the .well-known URI path prefix as specified in RFC 8615 for discovering Agent Skills.
Developer Kit
Modular plugin marketplace for Claude Code and agentic CLIs, with validated, spec-driven skills, agents, commands, and workflows for Java, TypeScript, Python, PHP, AWS, and AI.
Shinkoku
確定申告自動化 AI エージェントプラグイン — 帳簿管理から e-Tax 入力代行まで
Finding Unknowns Skills
14 installable skills for Claude Code, OpenAI Codex, and Hermes: find unknowns, clarify requirements, manage context, test assumptions, and verify bug fixes with regression evidence.
Medsci Skills
Agent Skills for medical research — literature search, reporting-guideline & citation checks, statistics, publication figures, submission. Works with Claude Code, Codex, Cursor & GitHub Copilot. Built by a physician-researcher, tested on real publications. MIT.
Modulestf
Agent skills for Claude Code and Codex that review, change and create reusable Terraform modules by the rules of terraform-aws-modules.
Milady
terminally online
Software Design Philosophy Skill
Claude Code skill: Software design philosophy guide based on A Philosophy of Software Design by John Ousterhout
Gtm Skills
GTM Skills for Claude & Codex
Claude Night Market
23 Claude Code plugins: TDD enforcement hooks, git/PR workflows, spec-driven development, code review, project lifecycle, fix-from-error, maintenance automation, context optimization, research, and multi-LLM delegation. 186 skills, 128 commands, 54 agents.
Youtube Skills
YouTube transcript skills for Claude Code, Cursor and Codex. Agent Skills to get transcripts, search YouTube, read channels and playlists, and bulk export.
Agent Skills Vrc Udon
Skills, rules, and validation hooks that teach AI coding agents to generate correct UdonSharp code
Socrates Skill
Socratic method teaching skill for Claude Code — guides users to discover answers through questioning
List refreshed November 15, 2026. Data comes from public GitHub repositories.