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Top 23 codex Open-Source Projects

codex

  1. cc-switch

    A cross-platform desktop All-in-One assistant for Claude Code, Codex, OpenCode, OpenClaw, Gemini CLI & Hermes Agent. Only official website: ccswitch.io

    Project mention: DeepSeek makes the V4 Pro price discount permanent | news.ycombinator.com | 2026-05-22

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  3. ui-ux-pro-max-skill

    An AI SKILL that provide design intelligence for building professional UI/UX multiple platforms

    Project mention: The AI Design Stack: Three Skills and a Workflow That Stops the Slop | dev.to | 2026-07-10

    Install UI/UX Pro Max and Impeccable

  4. graphify

    AI coding assistant skill (Claude Code, Codex, OpenCode, Cursor, Gemini CLI, and more). Turn any folder of code, SQL schemas, R scripts, shell scripts, docs, papers, images, or videos into a queryable knowledge graph. App code + database schema + infrastructure in one graph. (by Graphify-Labs)

    Project mention: Graphify: Turn any codebase into a queryable knowledge graph | news.ycombinator.com | 2026-07-05

  5. Understand-Anything

    Graphs that teach > graphs that impress. Turn any code into an interactive knowledge graph you can explore, search, and ask questions about. Works with Claude Code, Codex, Cursor, Copilot, Gemini CLI, and more. (by Egonex-AI)

    Project mention: My Agentic Engineering Workflow | dev.to | 2026-06-21

    Understand Anything — interactive code knowledge graphs

  6. ruflo

    🌊 The leading agent meta-harness. Deploy intelligent multi-player swarms, coordinate autonomous workflows, and build conversational AI systems. Features adaptive memory, self-learning intelligence, RAG integration, and native Claude Code / Codex / Hermes and many more Integrated

    Project mention: How I tracked down a 36GB memory leak in a Claude Code memory server | dev.to | 2026-06-21

    Upstream writeup with the full retainer trace: ruvnet/ruflo#2432. The wrapper itself, if you're curious: jazz-max/ruflo-hub.

  7. cherry-studio

    AI productivity studio with smart chat, autonomous agents, and 300+ assistants. Unified access to frontier LLMs

    Project mention: Protocol Launcher Series: One-Click Setup of Cherry Studio MCP Services and AI Models | dev.to | 2026-02-24

    Cherry Studio is a powerful desktop AI client. It supports connecting to multiple AI model providers (such as OpenAI, Anthropic, DeepSeek, etc.) and has full support for the MCP (Model Context Protocol).

  8. obsidian-skills

    Agent skills for Obsidian. Teach your agent to use Obsidian CLI and open formats including Markdown, Bases, JSON Canvas.

    Project mention: JSON Canvas Spec | news.ycombinator.com | 2026-04-02

    I am not sure why this popped up today, but it's nice to see it on HN again! A brief timeline with some links to past discussions:

    - 2022: The .canvas open format was created for Obsidian Canvas [0].

    - 2024: Official 1.0 spec of JSON Canvas [1].

    - 2024-2025 A number of apps/libraries have built up around the format for storage and import/export [2].

    - 2026: Obsidian Skills [3] includes support for .canvas (along with .md and .base) to make it easy for LLMs to read/write JSON Canvas, and opens interesting visualization/interaction patterns with agents.

    [0]: https://news.ycombinator.com/item?id=34066824

    [1]: https://news.ycombinator.com/item?id=39670922

    [2]: https://jsoncanvas.org/docs/apps/

    [3]: https://github.com/kepano/obsidian-skills

  9. CLIProxyAPI

    Wrap Antigravity, ChatGPT Codex, Claude Code, Grok Build as an OpenAI/Gemini/Claude/Codex compatible API service, allowing you to enjoy the free Gemini 3.1 Pro, GPT 5.5, Grok 4.3, Claude model through API

    Project mention: Switching from Claude Code to Grok – Same Interface, Different Model | dev.to | 2026-07-02

    The switch itself was interesting because I didn’t want to lose the Claude Code interface. I like the harness. The way it works with my codebase, the commands, the flow. So I used a helper called cliproxyapi. It’s a small proxy that sits between the Claude Code client and whatever model you point it at. You run it locally, tell it to forward requests to Grok’s API instead of Anthropic’s. Then you launch Claude Code the same way you always do, but it talks to Grok under the hood.

  10. marketingskills

    Marketing skills for Claude Code and AI agents. CRO, copywriting, SEO, analytics, and growth engineering.

    Project mention: Claude Code Skills for Marketing | news.ycombinator.com | 2026-01-27

  11. codebase-memory-mcp

    High-performance code intelligence MCP server. Indexes codebases into a persistent knowledge graph — average repo in milliseconds. 158 languages, sub-ms queries, 99% fewer tokens. Single static binary, zero dependencies.

    Project mention: Stop Making Your AI Coding Agent Grep Your Whole Repo — Try codebase-memory-mcp | dev.to | 2026-06-20

    codebase-memory-mcp is an open-source MCP server built to fix exactly that. It indexes your codebase into a persistent knowledge graph — functions, classes, call chains, HTTP routes, cross-service links — and lets your agent ask structural questions directly instead of reading its way through the filesystem.

  12. serena

    A powerful MCP toolkit for coding, providing semantic retrieval and editing capabilities - the IDE for your agent

    Project mention: Ask HN: SoTA of Context Building Methods | news.ycombinator.com | 2026-04-06

    You should add Serena https://github.com/oraios/serena to your list.

    Serena gives you symbol-level navigation, reading, and editing via tree-sitter. So you're already getting much of what CoderLM offers — plus Serena has editing capabilities(replace symbol body, insert before/after symbol, rename). GitNexus goes further with the graph/impact analysis layer on top.

    I personally use Serena and GitNexus.

    The case for using both

      - GitNexus tells you what to change (impact analysis, dependency maps, blast radius)

  13. taste-skill

    Taste-Skill - gives your AI good taste. stops the AI from generating boring, generic slop

    Project mention: Taste-Skill: The Anti-Slop Framework That Gives Your AI 28.5K⭐ Worth of Taste | dev.to | 2026-05-30

    npx skills add https://github.com/Leonxlnx/taste-skill

  14. Happy Coder

    Mobile and Web client for Claude Code. Spawn and control multiple Claude Codes in parallel. Happy Coder runs on your hardware. Works seamlessly with your existing tools and workflow. Secure with end-to-end encryption. Hands-free control with voice agent - not just dictation.

    Project mention: Happy — The Open-Source App That Puts Claude Code in Your Pocket | dev.to | 2026-04-15

    Code on GitHub. Live app at happy.engineering. More posts at radarlog.kr.

  15. agentmemory

    #1 Persistent memory for AI coding agents based on real-world benchmarks (by rohitg00)

    Project mention: Show HN: Mnemo – local-first AI memory layer for any LLM (Rust, SQLite,petgraph) | news.ycombinator.com | 2026-06-03

  16. CodexBar

    Show usage stats for OpenAI Codex and Claude Code, without having to login.

    Project mention: Token Optimisation 101: Stop Burning Money on AI Coding Agents | dev.to | 2026-04-26

    For Claude Code specifically, ccusage gives you a nice breakdown. For Codex, CodexBar by Peter Steinberger sits in your menu bar and shows active session usage.

  17. superset

    Code Editor for the AI Agents Era - Run an army of Claude Code, Codex, etc. on your machine (by superset-sh)

    Project mention: Show HN: A tool to sync env files to your Git worktrees | news.ycombinator.com | 2026-07-02

  18. orca

    Orca is the ADE for working with a fleet of parallel agents. Run any coding agent with your own subscription. Available on desktop and mobile.

    Project mention: Orca Review: The IDE Built for Parallel Coding Agents | dev.to | 2026-06-26

    # macOS (Homebrew) brew install --cask stablyai/orca/orca # macOS (Apple Silicon, direct DMG) open https://github.com/stablyai/orca/releases/latest/download/orca-macos-arm64.dmg # Windows start https://github.com/stablyai/orca/releases/latest/download/orca-windows-setup.exe # Linux (AppImage) wget https://github.com/stablyai/orca/releases/latest/download/orca-linux.AppImage chmod +x orca-linux.AppImage ./orca-linux.AppImage # Arch (AUR) yay -S stably-orca-bin

  19. AI-Research-SKILLs

    Comprehensive open-source library of AI research and engineering skills for any AI model. Package the skills and your claude code/codex/gemini agent will be an AI research agent with full horsepower. Maintained by Orchestra Research.

    Project mention: Claude can now run ML research experiments for you | news.ycombinator.com | 2025-12-05

  20. paseo

    Orchestrate multiple coding agents from desktop and mobile

    Project mention: I Built a Telegram Client for Pi | news.ycombinator.com | 2026-07-06

    I'm in a similar boat, I recently discovered Paseo (https://paseo.sh/) which has mostly surpassed my expectations. It has changed my workflows, pi interaction is via a client rather than inside screen. But...I mostly have not missed that portion.

  21. Understand-Anything

    Graphs that teach > graphs that impress. Turn any code, or knowledge base (Karpathy LLM wiki), into an interactive knowledge graph you can explore, search, and ask questions about. Works with Claude Code, Codex, Cursor, Copilot, Gemini CLI, and more.

    Project mention: Understand Anything – Graphs that teach the codebase | news.ycombinator.com | 2026-05-26

  22. claude-squad

    Manage multiple AI terminal agents like Claude Code, Codex, OpenCode, and Amp.

    Project mention: Top 17 Claude Code OSS Tools! Complete Guide to GitHub Open Source Dev Environments | dev.to | 2025-12-29

    3. Claude Squad ★5.4k

  23. refly

    The first open-source agent skills builder. Define skills by vibe workflow, run on Claude Code, Cursor, Codex & more. Build Clawdbot 🦞· APIs for Lovable · Bots for Slack & Lark/Feishu · Skills are infrastructure, not prompts.

    Project mention: State management in Refly codebase - Part 1.1 | dev.to | 2026-02-27

    Inspired by BulletProof React, I applied its codebase architecture concepts to the Refly codebase.

  24. 9router

    Unlimited FREE AI coding. Connect Claude Code, Codex, Cursor, Cline, Copilot, Antigravity to FREE Claude/GPT/Gemini via 40+ providers. Auto-fallback, RTK -40% tokens, never hit limits.

    Project mention: 9router: route Claude Code, Cursor, or Copilot through whichever free tier you've got | dev.to | 2026-05-09

    I was crawling GitHub trending for AI infra projects when I came across decolua/9router. It's the most thoughtful "stretch your free tiers" project I've seen for AI coding tools — and it does a few things I hadn't seen combined before. Worth a 60-second rundown for anyone burning through Cursor/Claude/Copilot budgets faster than they'd like.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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Index

What are some of the best open-source codex projects? This list will help you:

# Project Stars
1 cc-switch 114,803
2 ui-ux-pro-max-skill 100,579
3 graphify 77,928
4 Understand-Anything 70,977
5 ruflo 63,860
6 cherry-studio 48,131
7 obsidian-skills 40,686
8 CLIProxyAPI 39,134
9 marketingskills 37,590
10 codebase-memory-mcp 29,404
11 serena 26,076
12 taste-skill 25,066
13 Happy Coder 22,392
14 agentmemory 20,972
15 CodexBar 15,780
16 superset 12,350
17 orca 12,019
18 AI-Research-SKILLs 10,588
19 paseo 10,098
20 Understand-Anything 8,502
21 claude-squad 8,015
22 refly 7,422
23 9router 6,614

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