Personal thoughts that stay yours
Not everything you tell an AI is work. Keep those thoughts in Markdown notes you own and can export, instead of scattered chat histories on three platforms.
How it goes today
Some of what you write to an AI is thinking out loud: a choice, a doubt, something you don't tell anyone. Today it's scattered across chat histories, one per AI, and you can't find it again.
Your AIs share nothing with each other: every chat and every assistant starts from zero. Cobrain is the memory they all connect to, plain Markdown notes that Claude, ChatGPT, Claude Code or Cursor read and write.
How it works with Cobrain
- Keep a folder you share with no one.
- When a conversation is worth keeping, ask your AI to save the thought there, in your words.
- It's plain Markdown: you can read it, change it and export it whenever you like.
An example note
personal/thoughts/2026-10-13.md
Why I said no to the new project: not the money, the time with the kids.
To reread in March.What you need
Free. A folder you don't share is read only by you and by the AIs you connect.
More cases
Home renovation: two people, two AIs, one memory
One of you tells their AI what was bought and what it cost. The other asks their own ChatGPT, free plan included, and gets the answer from the same notes.
ReadPersonalA food diary your AI doesn't forget on day four
Tracking food with an AI breaks when you open a new chat. Keep the memory outside it: after three weeks you have a history you can turn into a table, not a lost chat.
ReadPersonalA gym log that remembers the weights
After each workout tell your AI what you lifted. It updates the plan note and suggests the next step; months later it answers from your own history, not from guesses.
ReadStart with a single note.
It is free and no card is needed. You sign in with a link sent by email, connect your AI and start building a memory that does not stay locked inside a chat.
