3,700 repositories keep their own agent configuration in the open: a CLAUDE.md, a rules file, instructions for Copilot, a skill the project runs on itself. These are not mods to install. They are worth reading for what they reveal — what a maintainer thinks an agent gets wrong.
Building agents8,442Claude Code6,875Data and AI3,584Git and workflow3,574Backend and APIs3,550Languages3,468Planning3,315Code review2,876Testing2,653DevOps and cloud2,462Writing and docs2,461Memory and context2,373Research2,315Frontend2,301Security2,167Project management1,944
All Claude Code32,436 Codex24,692 OpenCode23,614 GitHub Copilot3,700 Gemini CLI2,016 Cursor1,769 Windsurf202 Kiro113
| Project | Stars | Configures | Files | Always loaded |
|---|---|---|---|---|
| aws-samples/sample-well-architected-skills-and-steering aws.amazon.com Reusable skills and steering that teach AI coding agents how to apply the AWS Well-Archite | 276 | Codex, GitHub Copilot, OpenCode | 2 | 2,768 tok |
| yennanliu/InvestSkill yennj12.js.org US stock analysis skills for LLMs (Claude code, Gemini ...) | #AI | 275 | Claude Code, GitHub Copilot, Gemini CLI | 3 | 12,371 tok |
| Azure/awesome-azd aka.ms An awesome list that curates content (articles, videos, tutorials and docs) and templates | 273 | GitHub Copilot | 1 | 3,275 tok |
| storybookjs/mcp storybook-evals.vercel.app 🤖 | 271 | GitHub Copilot | 4 | 17,082 tok |
| qualixar/superlocalmemory superlocalmemory.com Open-source governed, local-first memory control plane for AI agents and teams. arXiv:2608 | 271 | Codex, GitHub Copilot, OpenCode | 2 | 2,203 tok |
| DandanLLab/legadoSkill | 271 | Claude Code, Codex, GitHub Copilot | 3 | 795 tok |
| Azure/kimojio-rs A thread-per-core Linux io_uring async runtime for Rust optimized for latency. | 271 | Claude Code, Codex, GitHub Copilot | 2 | 225 tok |
| gregs1104/pgbent PostgreSQL Benchmarking Toolkit | 267 | Codex, GitHub Copilot, OpenCode | 2 | 1,648 tok |
| mariuz/flamerobin flamerobin.org FlameRobin is a database administration tool for Firebird RDBMS. Our goal is to build a to | 266 | Claude Code, Codex, GitHub Copilot | 2 | 1,376 tok |
| finos/git-proxy git-proxy.finos.org Deploy custom push protections and policies on top of Git | 263 | Claude Code, Codex, GitHub Copilot, OpenCode | 19 | 2,493 tok |
| SamMorrowDrums/remarkable-mcp MCP server for accessing reMarkable tablet data - sync files, extract text from highlights | 263 | GitHub Copilot | 1 | 1,893 tok |
| microsoft/GitHub-Copilot-for-Azure GitHub Copilot for Azure | 261 | GitHub Copilot | 2 | 4,596 tok |
| ruby-grape/grape-swagger-rails Swagger UI as Rails Engine for grape-swagger gem. | 260 | Claude Code, GitHub Copilot | 2 | 1,394 tok |
| axa-group/oauth2-mock-server npmjs.com A development and test oriented OAuth2 mock server | 260 | Codex, GitHub Copilot, OpenCode | 2 | 2,265 tok |
| EmpiricaAI/empirica getempirica.com Make AI agents and AI workflows measurably reliable. Epistemic measurement, Noetic RAG, | 255 | Claude Code, Codex, GitHub Copilot, Cursor, OpenCode | 3 | 6,899 tok |
| aethersdr/AetherSDR aethersdr.com Native amateur-radio workstation for FlexRadio (FLEX-6000/8000/Aurora) — Linux, macOS, Win | 254 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 11 | 7,751 tok |
| Conceptual-Machines/magda-core magda.land An open ecosystem for music production. | 254 | Claude Code, GitHub Copilot | 24 | 3,510 tok |
| SCStelz/security-investigator Automated security investigation tool using Microsoft MCP Servers, GitHub Copilot, Python | 252 | Claude Code, Codex, GitHub Copilot | 29 | 22,159 tok |
| KyaniteLabs/kinocut kinocut.dev Guardrailed video editing MCP server for AI agents. FFmpeg, Hyperframes, repurposing tools | 251 | GitHub Copilot, Cursor, Windsurf | 3 | 180 tok |
| microsoft/AutoSaddler | 250 | GitHub Copilot | 1 | 764 tok |
| lornshrimp/Lorn.NovelWriteSkills An AI writing asset library for long-form web fiction and novel workflows. Rather than a r | 249 | GitHub Copilot | 7 | 13,967 tok |
| estruyf/vscode-demo-time demotime.show A Visual Studio Code extension to help you script your demos | 249 | Claude Code, GitHub Copilot | 3 | 2,096 tok |
| ghaida/intent designwithintent.ai Design with Intent: A collection of specialized AI agents and skills for experience design | 246 | GitHub Copilot | 1 | 10,724 tok |
| laiso/ts-bench laiso.github.io Benchmark CLI for comparing AI coding agents on TypeScript workloads. | 243 | Codex, GitHub Copilot, OpenCode | 2 | 343 tok |
| sonic-net/sonic-swss azure.github.io SONiC Switch State Service (SwSS) | 243 | GitHub Copilot | 1 | 1,727 tok |
| holtwood/awesome-cursorrules-zh holtwood.github.io A curated collection of Cursor AI programming rules | 132+ rules covering 32 areas, includ | 241 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 2,162 tok |
| ErikEJ/SqlServer.Rules 140+ T-SQL static code analysis rules for SQL Database Projects and ad-hoc scripts | 241 | Claude Code, GitHub Copilot | 2 | 3,767 tok |
| oculus-samples/Unity-MRMotifs The developer community is beginning to show the world why Mixed Reality can be special. D | 240 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 6 | 1,089 tok |
| swingerman/ha-dual-smart-thermostat The `dual_smart_thermostat` is an enhaced verion of generic thermostat implemented in Home | 240 | Claude Code, GitHub Copilot | 16 | 1,342 tok |
| codemonkey85/PKMDS-Blazor pkmds.app PKMDS: Pokémon Save Editor for Web (no support for game hacks) | 240 | Claude Code, Codex, GitHub Copilot, OpenCode | 8 | 5,037 tok |
| felipebarcelospro/igniter-js igniterjs.com Igniter is a modern, type-safe HTTP framework designed to streamline the development of sc | 240 | Codex, GitHub Copilot, Gemini CLI, OpenCode | 8 | 26,005 tok |
| GoogleCloudPlatform/race-condition developers.google.com The open source multi-agent simulation from the Developer Keynote at Google Cloud Next '26 | 239 | Claude Code, Codex, GitHub Copilot, Cursor, Gemini CLI, OpenCode | 5 | 2,675 tok |
| bitrouter/bitrouter bitrouter.ai elastic inference for your agentic workloads, on your terms | 238 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 1,890 tok |
| ECPay/ECPay-API-Skill ECPay API Skill is an API AI Skill package—install it in AI coding assistants (Claude Code | 238 | Codex, GitHub Copilot, Gemini CLI, OpenCode | 3 | 13,391 tok |
| antdigital-ai/agentic-ui agentic.antdigital.dev | 237 | Codex, GitHub Copilot, Cursor, OpenCode | 25 | 9,538 tok |
| johnpapa/ai-ready Agent Skill that analyzes your repo and generates the AI-ready configuration coding agents | 237 | Claude Code, Codex, GitHub Copilot, Cursor, OpenCode | 4 | 2,317 tok |
| ioteverythin/OpenDocs | 236 | Claude Code, GitHub Copilot | 2 | 293 tok |
| outlmd/outl outl.app Local-first outliner. Markdown is the source of truth. Sync that doesn't corrupt your tree | 236 | Claude Code, GitHub Copilot | 24 | 31,462 tok |
| vyos/vyos-documentation VyOS readthedocs | 235 | Codex, GitHub Copilot, OpenCode | 3 | 4,720 tok |
| dotnet/maui-labs dot.net Experimental and pre-release tools for .NET MAUI | 235 | Claude Code, Codex, GitHub Copilot, OpenCode | 13 | 23,125 tok |
| RailtownAI/railtracks docs.railtracks.org An agentic framework that helps developers build resilient agentic systems | 234 | Claude Code, Codex, GitHub Copilot, OpenCode | 4 | 3,562 tok |
| microsoft/P.808 This is an open-source implementation of the ITU P.808 standard for "Subjective evaluation | 232 | Claude Code, Codex, GitHub Copilot, OpenCode | 6 | 1,712 tok |
| calesthio/generative-media-skills Research-backed agent skills and tools for premium image, video, audio, voice, and generat | 231 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 4 | 827 tok |
| kooshi/SharpToolsMCP A suite of MCP tools for AIs to analyze and modify C# solutions with high signal, Roslyn p | 230 | GitHub Copilot | 1 | 1,014 tok |
| Penecruz/VAICOM-Community VAICOM for DCS World | 230 | Claude Code, GitHub Copilot | 2 | 1,510 tok |
| Garudex-Labs/caracal caracal.run 🐾 Authority, not credentials, for AI agents: policy-approved actions, delegation that can | 228 | Claude Code, GitHub Copilot | 19 | 4,434 tok |
| KbWen/agentic-os kbwen.com Governance framework for AI coding agents. It runs them through a five-step workflow (plan | 227 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 55 | 5,159 tok |
| timothywarner-org/claude-code techtrainertim.com Claude Code and Large-Context Reasoning (O'Reilly Live Learning) | 226 | Claude Code, GitHub Copilot | 23 | 5,219 tok |
| streamlit/agent-skills A collection of agent skills for development of Streamlit apps. | 226 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 1,428 tok |
| colophon-group/jobseek jseek.co Monitors company career pages for new job postings and surfaces them in a single dashboar | 223 | Claude Code, Codex, GitHub Copilot, OpenCode | 16 | 1,256 tok |