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.
How it goes today
In a renovation one person knows things and the other asks. How much has the bathroom cost? Were the tiles ordered? What's missing for the kitchen?
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
- Tell your AI about purchases, quotes and what's left: it writes them in a «house» folder.
- Share that folder with your partner, read-only.
- They ask their own ChatGPT: «how much have we spent so far?». They can read, not delete by mistake.
An example note
house/bathroom.md
| Item | Cost |
|---|---|
| Tiles | 1,240 € |
| Shower | 690 € |
Missing: mirror, towel rail.What you need
Free: read-only shares are included (up to 3).
More cases
A 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.
ReadPersonalPersonal 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.
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.
