23,733 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 agents8,505Claude Code6,886Git and workflow3,611Data and AI3,580Backend and APIs3,556Languages3,487Planning3,327Code review2,899Testing2,686Writing and docs2,480DevOps and cloud2,479Memory and context2,375Research2,323Frontend2,308Security2,172Project management1,965
All Claude Code32,517 Codex24,815 OpenCode23,733 GitHub Copilot3,719 Gemini CLI2,034 Cursor1,770 Windsurf202 Kiro114
| Project | Stars | Configures | Files | Always loaded |
|---|---|---|---|---|
| tig/silico Silico makes building maintainable firmware for embedded devices simple using AI. | 13 | Claude Code, Codex, OpenCode | 2 | 23,252 tok |
| 82deutschmark/arc-explainer arc.markbarney.net ARC-AGI Prize Explainer (Includes ARC-AGI-3!) | 13 | Claude Code, Codex, OpenCode | 11 | 12,635 tok |
| Treasoni/kaoyan An intelligent graduate entrance exam study system built with Claude Code, integrating the | 13 | Claude Code, Codex, OpenCode | 2 | 6,532 tok |
| LuisFelipeMoro/Harness-devkit Harness Devkit for agentic development | 13 | Claude Code, Codex, OpenCode | 2 | 802 tok |
| humblebanana/dsh-record-replay DeepSeek Harness record macOS desktop workflows by demonstration and turn them into agent | 13 | Codex, OpenCode | 1 | 273 tok |
| NVIDIA/digital-health-skills NVIDIA Digital Health skills repo for agent-guided healthcare AI workflows, including eval | 13 | Codex, OpenCode | 1 | 1,259 tok |
| femto/mcp-chrome mcp-chrome | 13 | Claude Code, Codex, OpenCode | 8 | 250 tok |
| alejooroncoy/campus-cli campuscli.com CLI no oficial para UPC Aula Virtual (Blackboard Learn) — terminal + MCP para Claude | 13 | Claude Code, Codex, OpenCode | 5 | 4,345 tok |
| Frihet-io/frihet-mcp frihet.io Official MCP server for Frihet ERP — 156 operations for AI-powered invoicing, tax & e-invo | 13 | Claude Code, Codex, OpenCode | 2 | 1,985 tok |
| tonydzi/claude-bible tonydzi.github.io Make Claude Code behave consistently across repos, sessions and humans: rules-as-files gov | 13 | Claude Code, Codex, OpenCode | 2 | 869 tok |
| Postpartum-genushyacinthus29/dotnet-skills Teach AI agents modern .NET skills for ASP.NET Core, EF, Blazor, MAUI, and more with a gro | 13 | Claude Code, Codex, Gemini CLI, OpenCode | 3 | 9,378 tok |
| mussolene/1c_hbk_bsl mussolene.github.io Open-source toolkit for 1C:Enterprise/BSL: 180 diagnostics, formatter, LSP, CLI, VS Code/C | 13 | Claude Code, Codex, OpenCode | 2 | 295 tok |
| cyanheads/pubchem-mcp-server npmjs.com Search the PubChem chemical database for compounds, properties, safety data, bioactivity, | 13 | Claude Code, Codex, OpenCode | 2 | 14,092 tok |
| starloghq/index starlog.dev Vet a package before your AI coding agent uses it — authoritative facts (CVEs, license, ma | 13 | Codex, GitHub Copilot, OpenCode | 2 | 172 tok |
| brandonwie/codex-hud brandonwie.github.io Single-line local context HUD for Codex CLI sessions. | 13 | Claude Code, Codex, OpenCode | 2 | 187 tok |
| pskoett/measuring-ai-proficiency Measuring AI Proficiency: Context Engineering as a Leading Indicator | 13 | Claude Code, Codex, GitHub Copilot, OpenCode | 19 | 9,401 tok |
| dangindev/antigravity-awesome-workspace-skill | 13 | Claude Code, Codex, Kiro, OpenCode | 66 | 387 tok |
| notnotype/llmlint Lint and polish LLM-generated Chinese text: locate AI writing tells with rules, fix them w | 13 | Claude Code, Codex, OpenCode | 2 | 4,736 tok |
| stevenn/ctxlayer Context-sharing MCP Gateway on Cloudflare | 13 | Claude Code, Codex, OpenCode | 8 | 6,843 tok |
| Friz-zy/ai-capability-registry Curated AI Workflows, Skills & MCP servers for secure multi-agent development | 13 | Codex, OpenCode | 1 | 758 tok |
| alaimo-labs/ai-first-skills alaimolabs.com Agent Skills for AI-First Product Management and Product Building | 13 | Claude Code, Codex, OpenCode | 2 | 5,785 tok |
| zuoyou12/longzu.skillls Jiangnan × Fenghuo Xizhuhou style distillation Agent Skills (universal for Claude Code/Cod | 13 | Codex, OpenCode | 1 | 629 tok |
| eyesecurity/skills EU compliance enforcement for AI agents. Org-profile-driven guardrails for NIS2, GDPR & IS | 13 | Codex, OpenCode | 1 | 92 tok |
| bks-lab/open-bridge bks-lab.github.io Stop re-explaining your work to your coding agent. Plain markdown and YAML in git, read at | 13 | Claude Code, Codex, GitHub Copilot, Gemini CLI, OpenCode | 6 | 6,927 tok |
| huangguang1999/paseo-skins huangguang1999.github.io Open-source Paseo themes and skins with a local theme builder, one-click Agent Skill, and | 13 | Codex, OpenCode | 1 | 507 tok |
| deevus/tea-skills Agent skills for Gitea/Forgejo issue, pull request, milestone, and label workflows using t | 13 | Claude Code, Codex, OpenCode | 2 | 993 tok |
| goadesign/goa-ai goa.design Design-first agentic systems in Go: declare agents, tools, MCP servers, policies, and stru | 13 | Claude Code, Codex, OpenCode | 2 | 3,159 tok |
| wezendy/elon-musk-algorithm-skills Elon Musk's 5-step algorithm as skills for AI agents. | 13 | Claude Code, Codex, Gemini CLI, OpenCode | 3 | 2,190 tok |
| eugeniughelbur/agents-md eugeniughelbur.github.io Generate and safely maintain AGENTS.md, the cross-tool standard for AI coding agents. Non- | 13 | Claude Code, Codex, OpenCode | 2 | 1,012 tok |
| conorbronsdon/gws-mcp-server conorbronsdon.com Curated MCP server for Google Workspace: Gmail, Calendar, Drive, Sheets, Docs, and Tasks v | 13 | Claude Code, Codex, OpenCode | 2 | 991 tok |
| rusel95/ios-agent-skills Production-tested iOS Agent Skills for Claude Code, Codex, and 40+ AI coding tools. 8 ente | 13 | Codex, OpenCode | 1 | 541 tok |
| narumiruna/gurume narumiruna.github.io Python CLI, TUI, and MCP server for searching Japanese restaurants on Tabelog | 13 | Claude Code, Codex, OpenCode | 2 | 1,035 tok |
| aiapplications001-art/seo-page-creator-agent All-in-One SEO Agent for Ranking Everywhere Faster. | 13 | Codex, OpenCode | 1 | 290 tok |
| denfry/codebase-index Local code map for AI coding agents: find, trace, and predict change impact with file:line | 13 | Claude Code, Codex, OpenCode | 4 | 677 tok |
| BluesPrince/thiri-mcp mcp.thiri.ai Deterministic music-theory MCP server & API — chord analysis, Roman-numeral analysis, voic | 13 | Claude Code, Codex, OpenCode | 2 | 181 tok |
| suryast/indonesia-civic-stack 🇮🇩 Production-ready Python SDK + MCP server for 14 Indonesian government data sources — | 13 | Claude Code, Codex, GitHub Copilot, Cursor, OpenCode | 4 | 3,032 tok |
| vanterx/mssql-performance-skills SQL Server performance tuning skills for LLMs — 829 checks across 26 skills covering T-SQL | 13 | Claude Code, Codex, OpenCode | 6 | 15,260 tok |
| cheewee2000/flamingo-pcb Prompt-first PCB CAD you drive from Claude Code over MCP — real LCSC parts, Freerouting au | 13 | Claude Code, Codex, OpenCode | 2 | 3,504 tok |
| JeffBrines/openfpa guiderail.io The FP&A toolbelt for AI coding agents. Claude Code or Codex does the thinking; openfpa gi | 13 | Claude Code, Codex, OpenCode | 2 | 2,383 tok |
| rvdbreemen/adr-kit Architecture decisions your AI coding agents actually follow. Ranked ADR retrieval and con | 13 | Claude Code, Codex, GitHub Copilot, OpenCode | 3 | 1,135 tok |
| DanielHou315/overleaf-mcp-rt npmjs.com Real-time MCP server + agent plugin for Overleaf — self-hosted Community Edition / Server | 13 | Claude Code, Codex, OpenCode | 2 | 3,059 tok |
| evoelsewhere/evoflux evoelsewhere.asia Evoflux is an open-source, local-first workspace where AI agents build software, conduct d | 13 | Codex, OpenCode | 1 | 1,459 tok |
| kezd088/100x-skill-tiktok TikTok/UGC agent skill | 13 | Claude Code, Codex, OpenCode | 2 | 2,489 tok |
| AutoConference/AutoConference-skill AutoConference is an Open-sourced AI-agents platform that simulates an openreview-style au | 13 | Claude Code, Codex, Gemini CLI, OpenCode | 3 | 2,419 tok |
| addyosmani/rust-browser Robin - build a web browser engine from scratch in Rust | 13 | Claude Code, Codex, OpenCode | 2 | 1,666 tok |
| ryanlewis/exeslim Minimal exe.dev base image for deployment targets — systemd and full platform wiring, with | 13 | Codex, OpenCode | 1 | 288 tok |
| ssheleg/sshlg-skills skills.sshlg.me Install and update agent skill packs for UX, delivery, design, integrations and verificati | 13 | Claude Code, Codex, OpenCode | 5 | 1,554 tok |
| The-40-Thieves/obsidian-tc Obsidian Turbocharged — governed, agent-ready Obsidian MCP server. Multi-vault native, plu | 13 | Claude Code, Codex, OpenCode | 16 | 6,194 tok |
| Innocent-children/dev-flow dev-flow.top Task control for AI coding agents: explicit scope, bounded verification, durable state, sa | 13 | Codex, OpenCode | 1 | 4,538 tok |
| GeiserX/telegram-archive-mcp geiserx.github.io MCP Server for Telegram-Archive — search messages, browse chats, and access archived Teleg | 13 | Claude Code, Codex, OpenCode | 4 | 2,339 tok |