43,652 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 |
|---|---|---|---|---|
| zeta92/design-library-plugin Global Claude Code plugin — 58 brand design systems (Stripe, Linear, Vercel, etc.) always | 10 | Claude Code | 1 | 1,503 tok |
| FujishigeTemma/semantic-scholar-mcp | 10 | Claude Code | 2 | 646 tok |
| regenrek/oplink-mcp oplink.instructa.ai easy workflows for mcp tools | 10 | Claude Code, Codex, Cursor, OpenCode | 12 | 29 tok |
| sam-ent/google-automation-mcp Google Workspace APIs for AI agents — Gmail, Drive, Sheets, Calendar, Docs, Forms, Tasks. | 10 | Gemini CLI | 1 | 776 tok |
| QuangThai/vision-bridge-mcp | 10 | Codex, OpenCode | 1 | 818 tok |
| jasnonaz/vibe-worldbuilding-mcp Vibe Worldbuilding | 10 | Claude Code | 1 | 1,297 tok |
| rsp2k/mcp-pdf pypi.org 🔒 Secure FastMCP server for comprehensive PDF processing - text extraction, OCR, table ex | 10 | Claude Code | 1 | 4,047 tok |
| antdv-next/skills Antdv Next Vue 3 component library skills. | 10 | Codex, OpenCode | 1 | 609 tok |
| gwas-catalog/mcp ebi.ac.uk GWAS Catalog Model Context Protocol server, supporting natural language queries of associa | 10 | Codex, OpenCode | 1 | 366 tok |
| godstale/ollama-mcp-tutorials | 10 | Claude Code | 1 | 1,494 tok |
| ApocryphalWord/KindroidMCP | 10 | Claude Code | 1 | 1,040 tok |
| kunal12203/token-counter-mcp Accurate Claude Code token counter MCP — tracks every input, output & cache token with USD | 10 | Claude Code | 1 | 611 tok |
| premex-ab/phone-mcp | 10 | Claude Code, GitHub Copilot | 2 | 5,546 tok |
| Aeven-AI/mcp-nanobanana mcp for nano banana using openrouter.ai | 10 | Codex, Gemini CLI, OpenCode | 2 | 2,076 tok |
| Hint-Services/mcp-trello | 10 | Claude Code | 1 | 819 tok |
| femto/mcp-chrome mcp-chrome | 10 | Claude Code, Codex, OpenCode | 8 | 250 tok |
| jeweis/mcpcat mcp | 10 | Claude Code, Codex, OpenCode | 2 | 2,012 tok |
| eliavamar/mcp-of-mcps | 10 | Claude Code | 1 | 335 tok |
| karlost/FreeloMCP | 10 | Claude Code | 1 | 1,167 tok |
| BrickDesignerNL/github-copilot-gpt-code-improver Custom Instruction for GitHub CoPilot to improve the output quality of the default GPT-mod | 10 | GitHub Copilot | 1 | 1,329 tok |
| arkangelai/second-brain second-brain-web-ashen.vercel.app Local-first, AI-native knowledge management system. Markdown + QMD hybrid search + Obsidia | 10 | Codex, OpenCode | 1 | 170 tok |
| usurahi-project/usurahi School-anime-inspired multi-agent development workflow with tmux, MCP, and role-driven col | 10 | Claude Code | 2 | 914 tok |
| mollyretter/forward-deployed-engineer-toolkit opinionated tools for shipping AI into real-world domains | 10 | Claude Code | 1 | 479 tok |
| miopea/swarm-legacy Swarm (legacy) — web dashboard + autopilot for AI coding agents. Superseded by miopea/swar | 10 | Claude Code | 4 | 2,809 tok |
| GoPlasmatic/Orion docs.goplasmatic.io The declarative runtime for AI agents, workflows, microservices, and event processing. | 10 | Claude Code | 1 | 11,297 tok |
| AkashGoenka/coldstart coldstartmcp.dev Self-maintaining and persistent codebase memory for AI coding agents — a deterministic AST | 10 | Claude Code | 1 | 6,203 tok |
| spxrogers/agentsync agentsync.cc Sync AI coding-agent configs (Claude Code, OpenCode, Codex, and more) from one canonical, | 10 | Claude Code, Codex, OpenCode | 3 | 12,439 tok |
| joshLong145/ambits visualize, and report code coverage within llm sessions | 10 | Codex, OpenCode | 1 | 1,234 tok |
| tidymodels/skills skills.tidymodels.org Claude Code Skills for Tidymodels | 10 | Claude Code | 2 | — |
| tonydzi/claude-bible tonydzi.github.io Make Claude Code behave consistently across repos, sessions and humans: rules-as-files gov | 10 | Codex, OpenCode | 1 | 864 tok |
| timwukp/agent-skills-best-practice 35 portable agent skills (Agent Skills spec) for Kiro & Claude Code: Scrum DevSecOps roles | 10 | Kiro | 4 | 1,744 tok |
| Rul1an/assay getassay.dev Open evidence profile for MCP tool actions. Enforce configured tool-call policies and reco | 10 | Claude Code, Codex, OpenCode | 3 | 7,506 tok |
| workingclass-ai/workingclass AI tools on the side of workers. Multilingual agent skill (Claude Code · Codex · Cursor) c | 10 | Codex, OpenCode | 1 | 421 tok |
| netresearch/typo3-extension-upgrade-skill Agent Skill for systematically upgrading TYPO3 extensions to newer LTS versions | Claude C | 10 | Codex, OpenCode | 1 | 662 tok |
| nuyoah-ai-works/open-nuyoah-skill Public, reusable Agent Skills: create exclusive white soft-block characters and generate a | 10 | Codex, OpenCode | 1 | 536 tok |
| Lancetnik/slop-writer Claude Code skill that scrapes a Telegram channel into SQLite, answers analytics questions | 10 | Claude Code | 3 | 2,963 tok |
| ponomr/thinking-toolkit 30 thinking models as one portable agent skill — Claude Code, Codex CLI, OpenClaw, and any | 10 | Codex, OpenCode | 1 | 941 tok |
| agentic-lineage/lineage agenticlineage.vercel.app Package and share AI agent workflows, skills, agents, and policies across Claude Code, Cod | 10 | Claude Code, Codex, OpenCode | 5 | 742 tok |
| e-t-y-b/etyb-skills etyb.ai ETYB — your AI engineering team as one open-source skill (/etyb). 14 specialists, 9 always | 10 | Claude Code, Codex, OpenCode | 2 | 966 tok |
| lyr1cs/rein Multi-source cross-validated memory MCP server for AI agents (Rust, jieba CJK, local-first | 10 | Codex, OpenCode | 1 | 17,034 tok |
| itallstartedwithaidea/MiniAgent googleadsagent.ai The Cowork Agent for Everything — trainable advertising AI + 14 platform MCP servers + age | 10 | Claude Code | 1 | 438 tok |
| Postpartum-genushyacinthus29/dotnet-skills Teach AI agents modern .NET skills for ASP.NET Core, EF, Blazor, MAUI, and more with a gro | 10 | Claude Code, Codex, Gemini CLI, OpenCode | 3 | 9,378 tok |
| edholofy/dojo.md dojo.md University for AI agents. 92 courses, 4400+ scenarios, any model via OpenRouter. Auto-trai | 10 | Claude Code | 11 | 3,168 tok |
| footprintjs/hcifootprint footprintjs.github.io Turn a web app's interaction surface into a typed, traversable skill graph an LLM can plan | 10 | Claude Code | 1 | 3,772 tok |
| redhuntlabs/wizard Build AI spells for what you do - a meta-builder that turns recurring tasks into reusable | 10 | Claude Code, Codex, Gemini CLI, OpenCode | 3 | 1,340 tok |
| zander-zyx/claude-mini-hud zdking.com A lighter alternative to claude-hud's core features, limited to 7 lines. Built-in usage qu | 10 | Claude Code, Codex, OpenCode | 2 | 2,695 tok |
| SawyerHan-AI/TideMind tidemind.ai A living second brain that connects everything you think with — your AI agents, your notes | 10 | Codex, OpenCode | 1 | 3,307 tok |
| EvilFreelancer/secs SECS (SECurity aSsistant) turns an AI coding agent (Claude Code, Cursor, Codex) into an au | 10 | Claude Code, Codex, OpenCode | 2 | 4,071 tok |
| freibergergarcia/phone-a-friend CLI relay for Claude Code, Codex, and OpenCode. Delegate to Antigravity, Claude, Codex, Ge | 10 | Claude Code, Codex, OpenCode | 2 | 12,165 tok |
| Dometrain/getting-started-claude-code dometrain.com Source code for the "Getting Started: Claude Code" course | 10 | Claude Code | 1 | — |