A 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.
How it goes today
The plan lives on a sheet that gets lost, or in an app you drop after two months. With an AI the problem is different: a new chat, and it remembers nothing.
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 the current plan in one note, with the reason for each weight.
- After the workout: «squat 4×6 at 80 kg, the last set was hard». The AI updates the log.
- Months later: «how has my squat gone since June?». It answers from the notes.
An example note
personal/gym/cycle-5.md
| Exercise | Start | Why |
|---|---|---|
| Bench press | 60 kg | reps dropped at 65 last month |What you need
Free. It sits next to your work notes, one folder over.
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.
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.
