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Top 23 coding-agent Open-Source Projects
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Project mention: New Withings Users Must Pay $99/Year for Apple Health Syncing | news.ycombinator.com | 2026-10-15
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AppSignal
Monitoring that respects your time & budget. APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product.
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archify
Turn any idea, plan, or codebase into a beautiful interactive diagram. An agent skill for Claude Code, Codex, and more.
Project mention: Stop dragging boxes in Draw.io: Turn plain text into interactive architecture maps | dev.to | 2026-10-06I recently found an open-source tool called Archify that takes a completely different approach.
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awesome-claude-code
A hand-picked collection of the finest of resources for the most awesome of agents, Claude Code, the undisputed champion of coding companions, from the unstoppable team at Anthropic PBC (no affiliation). A delectable showcase of top tier skills, ambidextrous agents, scintillating status lines, top notch developer tooling, and also we have plugins
Project mention: Put your Coding Agents in Drive w/ Superpowers (aka How Superpowers is the Automatic Transmission of Agentic Coding) | dev.to | 2026-05-28The most downloaded and widely used methodology in the Claude Code ecosystem is Superpowers, with over 208k stars⭐️ and 18.5k forks🍴 on GitHub (and counting!)
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As a Vim/Neovim user, my first pick for an ADE (agentic development environment) was herdr. I've been using it for a few weeks and it's been working great. Then a new competitor showed up, Orca, so I gave it a fair shot: I read the docs, installed it, and ran my usual work through it.
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open-design
🎨 Local-first, open-source alternative to Anthropic's Claude Design. ⚡ 19 Skills · ✨ 71 brand-grade Design Systems 🖼 Generate web · desktop · mobile prototypes · slides · images · videos · HyperFrames 📦 Sandboxed preview · HTML/PDF/PPTX/MP4 export 🤖 Runs on Claude Code / Codex / Cursor / Gemini / OpenCode / Qwen / Copilot / Hermes / Kimi CLI.
Project mention: 7 Open-Source Figma Alternatives for UI Design and Prototyping | dev.to | 2026-10-12GitHub: nexu-io/open-design
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atlas
Source control for agents. Use multiple coding agents, track their changes and query them in one place (by pacifio)
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gentle-ai
Gentle-AI configures the AI coding agents you already use: Claude Code, Cursor, OpenCode, Codex, Pi, and more. Choose persistent memory, Organic-Driven Development, curated skills, MCP servers, personas, and optional bounded review. Open source, no agent lock-in.
One that caught my attention is Gentle AI by Gentleman Programming. It's an ecosystem configurator that transforms AI coding agents into comprehensive development systems. It takes a different approach to SDD: instead of one AI doing everything, it delegates to specialized sub-agents for each phase — explore, specify, design, implement, verify. One command sets up the entire workflow, and it pairs perfectly with SpecKit Companion's visual interface.
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emdash
Emdash is the Open-Source Agentic Development Environment (🧡 YC W26). Run multiple coding agents in parallel. Use any provider. (by generalaction)
Project mention: Show HN: Offrun – manage every coding agent from one workspace | news.ycombinator.com | 2026-10-03 -
html-anything
✨ The agentic HTML editor — your local AI agent writes the HTML, you ship it. 🚀 75 Skills × 9 Surfaces (magazine · deck · poster · XHS / tweet · prototype · data report · Hyperframes) 🛡️ Sandboxed preview · 📤 1-click to WeChat / X / Zhihu / HTML / PNG 🔑 Zero API key — Claude Code / Cursor / Codex / Gemini / Copilot / OpenCode / Qwen / Aider.
Project mention: HTML-anything – The agentic HTML editor – your local AI agent writes the HTML | news.ycombinator.com | 2026-05-20 -
Project mention: Capture why AI wrote each commit, stored in Git-notes | news.ycombinator.com | 2026-08-24
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jevgrep
Find code by asking what it does. A CLI for coding agents that uses Jev to discover relevant files and source context.
Project mention: 10 Jev GitHub projects, explained through Jevfast.com's decision charts | dev.to | 2026-10-12GitHub repository · Jevfast decision view
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nanocoder
An open coding agent for your terminal, built by a community collective rather than a company. Bring your own model, keep your code on your machine, and owe nothing to anyone.
Not to be confused with nanocoder, the agentic coding harness.
https://github.com/Nano-Collective/nanocoder
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ripwire
The ripgrep of AI context: a zero-dependency C++23 CLI + MCP server for coding agents. Find what you want without reading the repo, then check you built what you meant — blast radius, tests-to-run, quality deltas. Signatures at 74.7% fewer bytes than bodies; every guess labelled, every loss published. Paddle out with a map.
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Surely the opposite question makes more sense: what's the value add of newer tools?
I will admit that I've used https://herdr.dev/ before because unlike tmux, it displays the status of running LLM agents.
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We're looking for someone to spearhead this effort: https://github.com/unstablebuild/rune/issues/50. I personally don't know enough about TS/JS's ecosystem to design a good experience. I know that Typescript's language server is one of the reference implementations, so at least the LSP part should be easy. What I'm not sure is what else is needed from a day to day workflow perspective.
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bernstein
The open‑source AI Agents Governance & Orchestration framework: write the rules declaratively, Bernstein enforces them and produces the verifiable, replayable record. Free, Apache-2.0. https://bernstein.run
Project mention: Show HN: Bernstein – run 44 CLI coding agents from one deterministic scheduler | news.ycombinator.com | 2026-08-14 -
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best-of-Agent-Harnesses
🏆 Ranked list of 167 AI agent harnesses, plus templates, playbooks, MCP, and learning resources. Rescored weekly.
Project mention: Best-of-Agent-Harnesses – Ranked list of 167 AI agent harnesses, rescored weekly | news.ycombinator.com | 2026-10-01 -
codealmanac
A codebase wiki for AI coding agents. Captures what the code can't say: decisions, flows, invariants, gotchas.
Project mention: Show HN: CodeAlmanac – Karpathy-style codebase wiki from your conversations | news.ycombinator.com | 2026-07-21 -
codex-slides
🎨 Open-source AI slide studio inside Codex: image-native decks, every slide a full visual canvas. ⚡ 10+ high-quality slides in ~4–5 minutes — Fast mode renders every page in parallel. 🔍 Watch the whole chain live: research → outline → style → render → edit → present → export PDF/PPTX. 🖥️ Browser-first · zero API keys · durable projects.
Project mention: Codex Slides: open-source AI slide studio powered by Codex. Prompt, repo to deck | news.ycombinator.com | 2026-07-23 -
agent-plugins
Agent Plugins for AWS equip AI coding agents with the skills to help you architect, deploy, and operate on AWS.
Project mention: I Compared 5 Ways to Make Claude Code Draw AWS Diagrams. The Prompt Mattered More Than the Tool | dev.to | 2026-10-02Links: AWS Diagram MCP Server, aws-architecture-diagram skill, draw.io MCP Tool Server, draw.io Claude Code plugin, Claude Code docs.
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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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A note from our sponsor - SaaSHub
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Index
What are some of the best open-source coding-agent projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | rea | 166,726 |
| 2 | archify | 81,099 |
| 3 | awesome-claude-code | 55,740 |
| 4 | herdr | 44,214 |
| 5 | open-design | 13,746 |
| 6 | atlas | 9,508 |
| 7 | gentle-ai | 7,698 |
| 8 | emdash | 5,952 |
| 9 | html-anything | 4,178 |
| 10 | git-ai | 2,828 |
| 11 | jevgrep | 2,628 |
| 12 | nanocoder | 2,507 |
| 13 | ripwire | 2,435 |
| 14 | herdr | 2,164 |
| 15 | dmux | 1,798 |
| 16 | awesome-claude | 1,687 |
| 17 | rune | 1,242 |
| 18 | bernstein | 1,201 |
| 19 | aws-agent-skills | 1,164 |
| 20 | best-of-Agent-Harnesses | 1,112 |
| 21 | codealmanac | 997 |
| 22 | codex-slides | 929 |
| 23 | agent-plugins | 916 |
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