Documentation
Cosmos documentation
Install Cosmos, connect AI tools through MCP, and learn how local-first memory works.
Getting started
Quick start: zero to AI-with-memory
Go from a fresh Mac to an AI coding assistant that remembers your project in about three minutes — install, connect, index, recall.
Install Cosmos on macOS
Install Cosmos on macOS in three steps: get your download link, drag the app to /Applications, then strip the quarantine flag and open it.
First launch: index your first folder
On first open, Cosmos asks for one thing — a folder to remember. Add a repo or notes folder and it indexes symbols and text on-device.
Guides
Connect your AI tools (MCP)
Connect Claude Code, Cursor, Cline, Windsurf, and Gemini CLI to Cosmos over MCP. The wizard sets it up automatically, or wire it by hand.
Multi-agent workspaces
One Cosmos, many scoped sub-brains. Give each AI agent its own folder so a researcher, coder, and reviewer never poison each other's memory.
Pro features & cloud backup
Cosmos Pro adds cloud backup over TLS, daily auto-backup, and one-click restore on a new Mac. Live for alpha invitees; public sale Q3 2026.
Reference
Troubleshooting
Fixes for common Cosmos issues on macOS: the 'can't be opened' gatekeeper warning, a slow first launch, missing MCP server, backup sign-in, and data location.
Support & contact
How to get help with Cosmos: alpha testers file issues in the private repo; everyone else emails cosmos@atitechs.com. Includes response times.