The open source AI research agent.
Install
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.
Use
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.
Sources
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. Add your own tools, such as a Zotero library, with feynman mcp add.
Telemetry
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
Contributing
git clone https://github.com/Companion-Inc/feynman.git
cd feynman
npm install
npm test
See CONTRIBUTING.md.