cobrain
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Use cases · Personal

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.

How it goes today

Anyone who has tried knows how it goes: on day four you open a new chat and the AI has forgotten your goal, what you avoid and what you ate.

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

  1. Write your goal and what you avoid in one note.
  2. Every day, tell your AI what you ate: it adds it to the month's note.
  3. After a few weeks: «show me everything as a table», or «what changed since I cut sugar?».

An example note

health/food/2026-10.md

## 13 October
Breakfast: yogurt, oats. Lunch: rice, chicken. Dinner: soup.
Note: hungry at 17:00.

What you need

Free. Works with Claude and ChatGPT, free plans included. It isn't medical advice.

Plans and pricing →

Free, no card needed

Start 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.

Create your brain, freeGo to your brainA thousand notes, as many AIs as you want to connect.