A personal AI OS for note-takers and developers — adds persistent memory, opinionated skills, and personal calibration to your terminal AI of choice.

Most tools ask you to query an AI. OneBrain co-evolves with you — every preference you teach sharpens the agent, every link it surfaces sharpens you.

• 🧠 Memory that compounds — agent remembers your preferences, projects, and prior decisions across sessions; no re-explaining context
• 🔒 Local-first — your vault lives in plain Markdown on your machine; no proprietary database, no cloud lock-in
• 🛠️ 30+ skills out of the box — /daily briefing · /capture quick notes · /distill topic synthesis · /research web→vault · /wrapup session log · more
• 🔌 Multi-harness — Claude Code, Gemini CLI, Codex, Qwen — same skills, same memory, your choice of model
• ⚡ Single Rust binary — 4.6 MB stripped · self-updating · zero runtime dependencies
• 📝 Plain Markdown — read in any editor, sync via iCloud/Dropbox/git, your data outlives any tool

# macOS
brew install onebrain-ai/onebrain/onebrain

# any platform via npm
npm install -g @onebrain-ai/cli

_{OneBrain · hello@onebrain.run · @onebrain_run}