The open source AI research agent.
# Add to your Claude Code skills
git clone https://github.com/Companion-Inc/feynmanLast scanned: 9/25/2026
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{
"file": "README.md",
"line": 20,
"type": "remote-install",
"message": "Install command (remote install script piped to a shell — review the source before running): \"curl -fsSL https://feynman.is/install | bash\"",
"severity": "low"
}
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"status": "PASSED",
"scannedAt": "2026-09-25T09:24:13.826Z",
"npmAuditRan": true,
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}See how feynman compares with popular alternatives.
feynman is an open-source ai agents skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by Companion-Inc. The open source AI research agent. It has 9,887 GitHub stars.
Yes. feynman passed SkillsLLM's automated security scan — a dependency vulnerability audit plus prompt-injection heuristics — with no high-severity issues. You can read the full report in the Security Report section on this page.
Clone the repository with "git clone https://github.com/Companion-Inc/feynman" and add it to your Claude Code skills directory (see the Installation section above).
feynman is primarily written in TypeScript. It is open-source under Companion-Inc on GitHub, so you can review or fork the full source.
Yes. SkillsLLM lists many other AI Agents skills you can browse and compare side by side. Open the AI Agents category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh feynman against similar tools.
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Review the source code, permissions, dependencies, and configuration before installing or running any third-party skill. Use is at your own risk. To the maximum extent permitted by applicable law, SkillsLLM is not liable for losses arising from third-party software.
macOS / Linux:
curl -fsSL https://feynman.is/install | bash
Windows (PowerShell):
irm https://feynman.is/install.ps1 | iex
Or with npm and Node.js 22.22 or newer: npm install -g @companion-ai/feynman.
Then sign in to a model provider:
feynman setup
The installation guide covers pinned versions, uninstalling, and the skills-only bundle for Codex and OpenCode. The setup guide covers local models and editors such as Zed.
feynman "what do we know about scaling laws"
feynman lit "RLHF alternatives"
feynman deepresearch "mechanistic interpretability"
| Workflow | What it does |
|---|---|
/deepresearch <topic> |
Planned investigation with parallel researchers and citation checks |
/lit <topic or lab> |
Literature review: consensus, disagreements, open questions |
/review <paper or draft> |
Critique with severity levels and a revision plan |
/audit <paper> |
Paper claims compared with its public code |
/replicate <paper> |
Replication plan; runs only after you choose an environment |
/recipe <task> |
Ranked ML training recipes with datasets and code |
/compare <topic> |
Source comparison matrix |
/draft <topic> |
Paper-style draft from research findings |
/autoresearch <idea> |
Bounded experiment loop against a benchmark |
/summarize <source> |
Summary of a paper, repository, or PDF |
Results are saved to outputs/ (drafts to papers/). /lit, /deepresearch, and /recipe also write a provenance file listing the sources used and what was verified.
Feynman searches alphaXiv, Semantic Scholar, OpenAlex, arXiv, PubMed, Europe PMC, bioRxiv, medRxiv, Crossref, the web, and Hugging Face, and reads local PDFs and documents. Free OPENALEX_API_KEY and SEMANTIC_SCHOLAR_API_KEY keys avoid the shared rate limits. It runs on stock Pi with four research agents: researcher, verifier, reviewer, and writer.
Feynman sends anonymous usage data to PostHog: commands, workflows, tools, models, token counts, and errors with their messages and stack traces (your home folder shown as ~). It never sends prompts, model output, paper content, or tool arguments. Turn it off with FEYNMAN_TELEMETRY=off. What is sent
git clone https://github.com/Companion-Inc/feynman.git
cd feynman
npm install
npm test
See CONTRIBUTING.md.