44,817 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 |
|---|---|---|---|---|
| trufflesecurity/trufflehog trufflesecurity.com Find, verify, and analyze leaked credentials | 28,903 | Cursor | 1 | — |
| google-labs-code/design.md stitch.withgoogle.com A format specification for describing a visual identity to coding agents. DESIGN.md gives | 28,753 | Claude Code, Codex | 4 | — |
| manaflow-ai/cmux cmux.com Open source Ghostty-based macOS terminal with vertical tabs and notifications for AI codin | 28,721 | Claude Code, Codex, OpenCode | 9 | 2,176 tok |
| mlflow/mlflow mlflow.org The open source AI engineering platform for agents, LLMs, and ML models. MLflow enables te | 28,695 | Claude Code, Codex, GitHub Copilot, OpenCode | 14 | 2,317 tok |
| BloopAI/vibe-kanban vibekanban.com Get 10X more out of Claude Code, Codex or any coding agent | 28,604 | Claude Code, Codex, OpenCode | 2 | 1,008 tok |
| TanStack/table tanstack.com 🤖 Headless UI for building powerful tables & datagrids for TS/JS - React-Table, Vue-Tabl | 28,550 | Codex, OpenCode | 1 | 765 tok |
| gastownhall/beads beads.gascity.com Beads - A memory upgrade for your coding agent | 28,536 | Claude Code, Codex, GitHub Copilot, OpenCode | 6 | 3,788 tok |
| OtterMind/Chat2DB chat2db.ai Chat2DB is a free, cross-platform, local-first database client and SQL workspace for devel | 28,357 | Codex, OpenCode | 1 | 4,041 tok |
| PrefectHQ/fastmcp gofastmcp.com 🚀 The fast, Pythonic way to build MCP servers and clients. | 28,322 | Claude Code, Codex, OpenCode | 11 | 4,342 tok |
| eyaltoledano/claude-task-master tryhamster.com An AI-powered task-management system you can drop into Cursor, Lovable, Windsurf, Roo, and | 28,309 | Claude Code, Cursor | 5 | 1,815 tok |
| openai/symphony openai.com Symphony turns project work into isolated, autonomous implementation runs, allowing teams | 27,949 | Codex | 7 | — |
| OthmanAdi/planning-with-files gilded-laurel-c7nj.here.now Persistent file-based planning for AI coding agents and long-running tasks. Crash-proof ma | 27,911 | Claude Code, Codex, Gemini CLI, OpenCode | 5 | 1,090 tok |
| Kilo-Org/kilocode kilo.ai Kilo is the all-in-one agentic engineering platform. Build, ship, and iterate faster with | 27,874 | Claude Code, Codex, OpenCode | 13 | 4,422 tok |
| vercel/ai ai-sdk.dev The AI Toolkit for TypeScript. From the creators of Next.js, the AI SDK is a free open-sou | 27,762 | Claude Code, Codex, OpenCode | 3 | 3,462 tok |
| virattt/dexter An autonomous agent for deep financial research | 27,761 | Codex, OpenCode | 1 | 1,434 tok |
| phuryn/pm-skills productcompass.pm PM Skills Marketplace: 100+ agentic skills, commands, and plugins — from discovery to stra | 27,719 | Claude Code, Codex, OpenCode | 2 | 1,910 tok |
| recharts/recharts recharts.github.io Redefined chart library built with React and D3 | 27,687 | Claude Code, Codex, OpenCode | 9 | 628 tok |
| Wox-launcher/Wox woxlauncher.com A cross-platform launcher that simply works | 27,602 | Claude Code, Codex, OpenCode | 13 | 2,344 tok |
| JimLiu/baoyu-skills | 27,328 | Claude Code | 1 | 1,744 tok |
| agentskills/agentskills agentskills.io Specification and documentation for Agent Skills | 26,985 | Claude Code, Codex, OpenCode | 4 | 373 tok |
| AgriciDaniel/claude-seo Universal SEO skill for Claude Code. 26 sub-skills + 19 sub-agents covering technical SEO, | 26,932 | Claude Code, Codex, OpenCode | 2 | 6,901 tok |
| deepset-ai/haystack haystack.deepset.ai Open-source AI orchestration framework for building context-engineered, production-ready L | 26,929 | Claude Code, Codex, OpenCode | 2 | 1,902 tok |
| promptfoo/promptfoo promptfoo.dev Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. | 26,885 | Claude Code, Codex, OpenCode | 7 | 5,275 tok |
| every-app/open-seo openseo.so Open source alternative to Semrush and Ahrefs | 26,528 | Claude Code, Codex, OpenCode | 29 | 1,926 tok |
| VoltAgent/awesome-claude-code-subagents getdesign.md A collection of 100+ specialized Claude Code subagents covering a wide range of developmen | 26,360 | Claude Code | 1 | 595 tok |
| biomejs/biome biomejs.dev A toolchain for web projects, aimed to provide functionalities to maintain them. Biome off | 26,053 | Claude Code, Codex, OpenCode | 13 | 1,127 tok |
| browserbase/stagehand stagehand.dev The SDK to extract data and interact with any site on the web. Get started with Claude Cod | 25,961 | Codex, OpenCode | 1 | 160 tok |
| EveryInc/compound-engineering-plugin every.to Official Compound Engineering plugin for Claude Code, Codex, Cursor, and more | 25,945 | Claude Code, Codex, Gemini CLI, OpenCode | 3 | 8,896 tok |
| earthtojake/text-to-cad texttocad.dev Design physical products with AI | 25,621 | Codex, OpenCode | 1 | 5,627 tok |
| activepieces/activepieces activepieces.com AI Agents & MCPs & AI Workflow Automation • (~400 MCP servers for AI agents) • AI Automati | 25,390 | Claude Code, Codex, OpenCode | 22 | 10,430 tok |
| letta-ai/letta docs.letta.com Platform for stateful agents: AI with advanced memory that can learn and self-improve over | 25,358 | Codex, OpenCode | 1 | 708 tok |
| pascalorg/editor editor.pascal.app Open-source 3D architectural editor with a local CLI, MCP tools, and practical workflows f | 25,350 | Claude Code, Codex, GitHub Copilot, Cursor, Gemini CLI, OpenCode | 7 | 751 tok |
| agentsmd/agents.md agents.md AGENTS.md — a simple, open format for guiding coding agents | 25,347 | Codex, OpenCode | 1 | 441 tok |
| chromium/chromium chromium.googlesource.com The official GitHub mirror of the Chromium source | 25,252 | Claude Code, Codex, GitHub Copilot, Gemini CLI | 11 | 186 tok |
| tursodatabase/turso A SQL database in Rust: SQLite-compatible, now also speaking Postgres (experimental). The | 25,173 | Claude Code, Codex, OpenCode | 15 | 2,958 tok |
| nocobase/nocobase nocobase.com NocoBase is the open-source platform for building, running, and evolving business systems | 24,845 | Claude Code, Codex, OpenCode | 3 | 2,891 tok |
| NirDiamant/GenAI_Agents diamant-ai.com 50+ tutorials and implementations for Generative AI Agent techniques, from basic conversat | 24,835 | Codex, OpenCode | 1 | 957 tok |
| modelcontextprotocol/python-sdk py.sdk.modelcontextprotocol.io The official Python SDK for Model Context Protocol servers and clients | 24,773 | Claude Code, Codex, OpenCode | 4 | 2,212 tok |
| slopus/happy happy.engineering Orchestrate Claude, Codex and Grok in one app. Open-source (MIT), reuses the subscriptions | 24,514 | Claude Code, Codex, OpenCode | 11 | 365 tok |
| different-ai/openwork openworklabs.com The open-source alternative to Claude Cowork (powered by opencode) | 24,416 | Claude Code, Codex, OpenCode | 32 | 1,254 tok |
| processing/p5.js p5js.org p5.js is a client-side JS platform that empowers artists, designers, students, and anyone | 24,307 | Codex, OpenCode | 1 | 4,651 tok |
| RooCodeInc/Roo-Code roocode.com Roo Code gives you a whole dev team of AI agents in your code editor. | 24,245 | Codex, OpenCode | 1 | 95 tok |
| facebook/lexical lexical.dev Lexical is an extensible text editor framework that provides excellent reliability, access | 23,990 | Claude Code, Codex, OpenCode | 3 | 6,390 tok |
| SuperClaude-Org/SuperClaude_Framework superclaude.netlify.app A configuration framework that enhances Claude Code with specialized commands, cognitive p | 23,928 | Claude Code, Codex, OpenCode | 4 | 3,795 tok |
| coleam00/Archon archon.diy The first open-source harness builder for AI coding. Make AI coding deterministic and repe | 23,835 | Claude Code, Codex, GitHub Copilot, OpenCode | 55 | 3,724 tok |
| JanDeDobbeleer/oh-my-posh ohmyposh.dev The most customisable and low-latency cross platform/shell prompt renderer | 23,715 | Claude Code, Codex, GitHub Copilot, OpenCode | 5 | 1,122 tok |
| kriasoft/react-starter-kit reactstarter.com Modern React starter kit with Bun, TypeScript, Tailwind CSS, tRPC, Stripe, and Cloudflare | 23,707 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 1,495 tok |
| marimo-team/marimo marimo.io A reactive notebook for Python — run reproducible experiments, query with SQL, execute as | 23,449 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 731 tok |
| oxc-project/oxc oxc.rs ⚓ A collection of high-performance JavaScript tools. | 23,346 | Codex, GitHub Copilot, OpenCode | 2 | 3,631 tok |
| Skyvern-AI/skyvern skyvern.com Automate browser based workflows with AI | 23,342 | Claude Code, Codex, OpenCode | 3 | 1,554 tok |