# SecondOS

One memory for your codebase. Sync a repo once and any AI tool reads its structure-aware map over MCP instead of re-scanning — so it stops re-explaining your code every session. Plus a self-maintaining living knowledge base. Your source never leaves your machine (K-S23).

- **Sync once, every tool reads it** — Cursor, Claude Code, Copilot, Cline, Windsurf and hosted agents read the same map over MCP.
- **~5× fewer tokens per question** (measured on real repos) — the map is the interface, not the whole file.
- **Private by default** — only the map (symbols, signatures, routes, module layout) leaves your machine; never your source.

Get started: `bunx @secondos/cli push .` then `secondos mcp .`. Free to start, no credit card.