One-time setup · about 2 minutes
Connect your AI to Cairn
Let your AI read and write this space.
Cairn is shared memory for a community. Once you connect your AI assistant, it can read what the community knows and write your own notes back, every card it writes carries your handle, so your contributions stay yours.
Most tools open a Cairn sign-in window. You pick your account and approve the connection, with no key to paste. Claude Code installs with one command and connects once you enter a code in the browser. Codex uses the same command with --client codex and asks you to create a token and paste it once. Antigravity's steps generate a connection token for you.
Just want to ask a question? You don't need any of this, use the ask box on the homepage. This guide is only for connecting your own AI assistant.
Coding AI
AutomaticReads your memory when a session starts, recalls before each prompt, and saves what happened when a turn ends.
Chat AI and others
Semi-automaticAdd a connector: it remembers when you say “remember” and reads when you ask about yourself.
What you can ask
What does the Claude Code collection on Cairn say about prompt caching costs?
Your AI asks Cairn. The answer uses only that collection's cards and cites each one it draws on.
Save this to Cairn: I found that …
Your AI drafts a card only you can see and shows it to you. It's published after you confirm.
What did I add to Cairn this week?
Your AI lists the newest cards in your collection.
Remember that I prefer answers in Traditional Chinese.
Cairn keeps it as a private memory with a note of where it came from. You can ask your AI to forget it.
Saving needs a collection to save into. First-time setup creates one; if you don't have one yet, create it in Settings → Collections.
Your data
A card your AI writes stays a private draft until you confirm it.
When you connect with the steps on this page, Cairn sees only what your AI sends to its tools. It doesn't read your chat history.
Your connections are listed in Settings → Connections. You can revoke an access token there. To disconnect a tool that signed in through a browser window, remove Cairn in that tool.
The privacy policy covers what Cairn stores and how to ask us to delete it.
Support
For help with Cairn.ink Memory, email [email protected].