What does AI's memory feature actually remember about me?
It's a notepad the app keeps, not a brain.
In "Does AI learn from me?" we saw that the model itself doesn't remember you. Memory features work because the app keeps notes about you and slips some of them onto the desk.
This lesson looks at those notes: what goes in, what comes out, and why they go stale.
Behind the scenes, a memory is usually just a short line of text:
Works as a product manager at a telecoms company.
Prefers short answers without bullet points.
Is training for a half marathon in March.
That's it. There's no recording of your conversations sitting in the model. There are a few dozen sentences like these.
Made-up example.
Different apps handle the notes differently:
ChatGPT and Claude have taken quite different approaches, and both keep changing. It's worth checking what yours does.
They go stale. The half marathon was in March. It's now October, and it's still suggesting carb-loading.
They leak into the wrong place. A note about your personal life turns up while you're screen-sharing a work chat.
They pile up and contradict each other. "Prefers detailed answers" from January, "wants short answers" from June. Both on the desk.
Drew Breunig expects this last one to be the big problem as personal assistants build up months of memories: notes that conflict, and nobody tidying them up.
A note doesn't get special treatment. It's more text on the desk, so everything from the earlier lessons applies.
An irrelevant note can steer the answer (see "Four ways a long chat confuses AI"). An out-of-date note is a mistake it'll build on.
Most apps let you see what's been saved. It's usually under settings, in a section called something like Memory or Personalisation.
The first time you look can be a surprise. Some of it will be right, some out of date, and some will be things you'd forgotten you mentioned.
Read your memory notes once. Delete anything wrong, out of date or more personal than you'd like.
Use a temporary or private chat for one-off things you don't want remembered. Most apps have one.
Keep work and personal separate. If your app has projects or separate spaces, use them, so personal notes don't leak into work chats.
When an answer seems oddly specific about you, ask: "What do you know about me that shaped that answer?"