22,170 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 agents7,588Claude Code6,636Data and AI3,676Backend and APIs3,496Languages3,402Planning3,219Git and workflow3,187Code review2,745Testing2,374Memory and context2,364DevOps and cloud2,310Writing and docs2,309Research2,295Frontend2,261Security2,021Productivity1,715
All Claude Code31,998 Codex23,222 OpenCode22,170 GitHub Copilot3,550 Gemini CLI1,918 Cursor1,738 Windsurf137 Kiro80
| Project | Stars | Configures | Files | Always loaded |
|---|---|---|---|---|
| donnfelker/donnfelker-plugin-marketplace | 4 | Claude Code, Codex, OpenCode | 2 | 2,124 tok |
| nickytonline/pimp-my-ride-mcp An MCP server that allows you to configure a car | 4 | Claude Code, Codex, GitHub Copilot, Cursor, OpenCode | 4 | 3,846 tok |
| ythalorossy/openfda | 4 | Claude Code, Codex, OpenCode | 2 | 2,128 tok |
| mbk-dev/okama-mcp MCP server providing investment analysis tools backed by the okama Python library | 4 | Claude Code, Codex, OpenCode | 5 | 1,868 tok |
| johnnyzhoujz/pin-it-public justpinit.xyz A local Mac pinboard for saving anything you want to reuse with any AI. | 4 | Claude Code, Codex, OpenCode | 2 | 510 tok |
| foundry-works/foundry-mcp foundry-mcp | 4 | Claude Code, Codex, OpenCode | 2 | 4,413 tok |
| EoinFalconer/granola-mcp-server | 4 | Codex, OpenCode | 1 | 1,465 tok |
| jweingardt12/BaseClaw jweingardt12.github.io Win your fantasy league, with the help of AI. Allows for Claude/OpenClaw management of you | 4 | Claude Code, Codex, OpenCode | 2 | 4,647 tok |
| manojbajaj95/agent-knowledge-cards Filesystem-first knowledge cards for coding agents; durable facts as trusted memory. Save | 4 | Codex, OpenCode | 1 | 879 tok |
| marcusquinn/quickfile-mcp MCP server for QuickFile UK accounting software - invoices, clients, purchases, banking, a | 4 | Claude Code, Codex, GitHub Copilot, Cursor, OpenCode, Windsurf | 6 | 706 tok |
| nuxeo/nuxeo-mcp-server Nuxeo MCP Server | 4 | Codex, OpenCode | 1 | 3,817 tok |
| prikotov/moex-mcp-server | 4 | Codex, OpenCode | 1 | 346 tok |
| AgiMaulana/HuaweiAppGalleryMcp | 4 | Codex, OpenCode | 2 | 581 tok |
| bmdhodl/agent47 agentguard47.com Python runtime checks for AI agents: budgets, loops, retries, and local traces. Zero runti | 4 | Claude Code, Codex, GitHub Copilot, OpenCode | 9 | 6,555 tok |
| cyanheads/openfda-mcp-server npmjs.com Query FDA data on drugs, food, devices, and recalls via openFDA. STDIO or Streamable HTTP. | 4 | Claude Code, Codex, OpenCode | 2 | 12,346 tok |
| AdelElo13/neuromcp npmjs.com Semantic memory for AI agents — local-first MCP server with hybrid search, governance, and | 4 | Claude Code, Codex, OpenCode | 2 | 1,832 tok |
| cyanheads/libofcongress-mcp-server npmjs.com Search LOC digital collections, browse Chronicling America newspapers with full OCR text, | 4 | Claude Code, Codex, OpenCode | 2 | 11,494 tok |
| davidmosiah/google-ads-mcp-unofficial npmjs.com Unofficial MCP server for Google Ads — campaign management, keyword/bid optimization, budg | 4 | Codex, OpenCode | 1 | 851 tok |
| GifariKemal/argus-web-mcp Argus — SURIOTA self-hosted web fetch/scrape/search MCP (20 tools, unlimited, owned). Repl | 4 | Claude Code, Codex, OpenCode | 2 | 4,166 tok |
| GiulioDER/RE-call giulioder.github.io Memory that abstains instead of guessing: agent memory on your own Postgres with a verdict | 4 | Claude Code, Codex, OpenCode | 2 | 13,129 tok |
| PrintrFi/printr-mcp printrfi.github.io Printr mcp server for AI agents | 4 | Claude Code, Codex, OpenCode | 5 | 923 tok |
| vibgrate/cli vibgrate.com Local codebase intelligence for AI coding agents and software teams, in the CLI and VS Cod | 4 | Codex, OpenCode | 1 | 953 tok |
| PhilipAD/health-export-mcp healthexport.dev Open-source Apple Health MCP server for the MetricBridge iOS app: query 190 HealthKit metr | 4 | Codex, OpenCode | 1 | 763 tok |
| BlueStarSystem/aura-ui aura-ui.com 127 free MIT Blade components for Laravel + Livewire + Alpine + Tailwind 4. Own-the-code C | 4 | Claude Code, Codex, OpenCode | 2 | 1,418 tok |
| cyanheads/brapi-mcp-server npmjs.com A collaborative BrAPI v2.1 workspace for multi-agent research via MCP. Search studies, ger | 4 | Claude Code, Codex, OpenCode | 2 | 16,416 tok |
| p1va/symbols MCP to read, inspect and navigate codebase symbols by connecting to a Language Server | 4 | Claude Code, Codex, OpenCode | 5 | 2,592 tok |
| davidmosiah/eight-sleep-mcp wellness.delx.ai Unofficial Eight Sleep MCP server — give your AI agent your smart-mattress sleep trends, t | 4 | Codex, OpenCode | 1 | 246 tok |
| navapbc/rebar Rebar can block work until an AI plan review passes, require signed completion verificatio | 4 | Claude Code, Codex, GitHub Copilot, OpenCode | 5 | 10,531 tok |
| rn-devtools-hub/rn-devtools-hub rn-devtools-hub.github.io The agent runtime for React Native and Expo: an MCP server that sees the app the way React | 4 | Claude Code, Codex, OpenCode | 4 | 4,962 tok |
| sandraschi/mixx-dj-mcp Mixxx DJ control via FastMCP — 40+ tools: decks, stems (Demucs), video decks, crates, OSC | 4 | Codex, Cursor, OpenCode, Windsurf | 3 | 1,350 tok |
| nikolay-e/diffctx nikolay-e.github.io Smart git diff context for LLMs and AI agents: budgeted fragment selection, deterministic, | 4 | Claude Code, Codex, OpenCode | 2 | 1,390 tok |
| bird-chinese-community/BIRD.skills BIRDCC agent skills registry | 4 | Codex, OpenCode | 1 | 1,795 tok |
| gaia-research/gaia-skill-heaven gaia-research.github.io Skill Heaven -- for real software engineers. Agent Plugin that treats your skills like RAM | 4 | Claude Code, Codex, OpenCode | 2 | 4,346 tok |
| obeone/claude-skills 🧠 Modular skills for autonomous AI agents. Production-ready Docker & Kubernetes tooling w | 4 | Claude Code, Codex, OpenCode | 2 | 1,803 tok |
| Cadasto/openehr-assistant-plugin cadasto.github.io openEHR assistant AI plugin suite with Skills, commands, and MCP server configuration for | 4 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 6,386 tok |
| VirajMishra1/loadout npmjs.com Discover, curate, and activate skills across 12 coding agents—then hand off and coordinate | 4 | Claude Code, Codex, OpenCode | 2 | 173 tok |
| aipickgold/md2card aipickgold.com 🎴 Xiaohongshu graphic card generator · Convert Markdown to 3:4 cards with one click · 55+ | 4 | Claude Code, Codex, OpenCode | 2 | 919 tok |
| apideck-libraries/api-skills developers.apideck.com One abstraction, 146 SaaS connectors. Agent skills for Apideck's Unified API — integrate S | 4 | Codex, OpenCode | 1 | 975 tok |
| Neetx/ai-research-radar AI Research Radar — Evidence-Grounded Trend Ledger for AI Systems | 4 | Claude Code, Codex, OpenCode | 3 | 2,905 tok |
| petar-djukic/writing-skills Claude Code skills for rewriting AI-drafted prose to pass AI detectors: a measured three-s | 4 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 9,300 tok |
| Endokelp/DecisionCouncil skills.sh Evidence-bound multi-agent council for Cursor and Claude Code. Scout (last30days), Advocat | 4 | Codex, OpenCode | 1 | 194 tok |
| beriktassuly/solana-audit-skill Evidence-backed Solana audit skill for Claude Code and Agent Skills: report-backed taxonom | 4 | Codex, OpenCode | 1 | 279 tok |
| TreatTrick/skill-sync treattrick.github.io ❯ Open-source desktop app to sync Claude Code, Codex, and AI agent skills across computers | 4 | Claude Code, Codex, OpenCode | 2 | 2,738 tok |
| punt-labs/quarry Locally hosted semantic search for AI agents. 20+ document formats, hybrid search, agent m | 4 | Claude Code, Codex, GitHub Copilot, OpenCode | 5 | 11,144 tok |
| KSEGIT/Version-Sentinel Claude Code plugin that hard-blocks dependency additions, bumps, and downgrades until a fr | 4 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 4 | 3,454 tok |
| TMHSDigital/Unity-Developer-Tools tmhsdigital.github.io AI-powered development toolkit for Unity game development in Cursor IDE. 18 skills, 8 rule | 4 | Claude Code, Codex, Cursor, OpenCode | 3 | 4,818 tok |
| alanshurafa/co-evolution Structured refinement of any document between AI agents. Two agent roles bounce a file bac | 4 | Claude Code, Codex, OpenCode | 2 | 6,656 tok |
| mryll/skills Portable agent skills for AI coding agents — works with Claude Code, OpenAI Codex CLI, Gem | 4 | Claude Code, Codex, OpenCode | 2 | 352 tok |
| karthikrshet/aiskills Reusable, tool-agnostic AI engineering skills, workflows, templates, and evaluation playbo | 4 | Codex, OpenCode | 1 | 979 tok |
| abk1969/ai-act-skills Multi-platform agent skills (Claude Code + Gemini CLI + OpenAI Codex) for EU AI Act compli | 4 | Codex, Gemini CLI, OpenCode | 2 | 1,993 tok |