How your assistant actually remembers — and why most of them don’t.
The fourth piece. Set It Up is the pages you write; Your Second Doorway is reaching them from anywhere; The Pre-Publish Gate checks before you publish. This one decides what’s worth keeping.
You have a long working session with an AI. Real thinking happens. You decide three things, discover one you were wrong about, and notice a pattern you’d missed for months.
Then you close the window.
Next week you open a new one and start again — re-explaining, re-deciding, occasionally re-making the same mistake. The tool has “memory,” but what it remembers is whatever it happened to absorb: your fragments, your half-thoughts, the idea you talked yourself out of, all flattened to the same weight as the thing you actually concluded.
The fix is not a bigger memory. It’s a gate — and the gate is you.
Four rules make it work, and each one is doing a job.
Not a limitation — the whole point. If everything survives, nothing is distinguished, and the record fills with things you said while thinking rather than things you decided.
At the end of any substantial session, without being asked.
If you have to remember to ask for a brief, you will have no memory by autumn. This is the rule people skip, and skipping it is why their system quietly holds nothing.
You cut what doesn’t matter, correct what it misread, and keep what's true. Then it's memory.
This is the load-bearing step. An assistant deciding on its own what mattered is guessing at your judgment; the whole value is that a human passed over it once.
A brief can be un-committed — strike it from the index and note why.
Memory you can't correct is worse than no memory, because you'll trust it.
Short. If it takes longer than the work did, it's not a brief.
MEMORY Working sessions are forgotten by design. Only committed briefs are memory. At the end of any substantial session, draft a brief WITHOUT being asked. Do not wait for me to request one — if I have to remember, there will be no memory. Draft it; I edit and commit it; nothing enters memory otherwise. Keep a brief short: - what happened (2-3 sentences) - what was decided, including what we rejected and why - why it matters — the part I won't reconstruct later - what must not be forgotten - open — needs a human Keep an index at [WHERE YOUR MEMORY LIVES] listing every committed brief, plus a section called "patterns worth watching" — add to it only when something has happened more than twice. Read the index at the start of any session that needs history: patterns, prior decisions, what we already tried. A brief can be un-committed. If I strike one, note why rather than deleting it silently.
Two people who share work can share a world without sharing a mind. Your assistant and theirs read the same facts and the same values — but what passes between them is a brief, which means nothing crosses that a human didn't approve.
One primitive, two jobs: it's how you remember, and it's how you hand something to someone else.
That sentence is the whole method. Everything else here is the mechanics of keeping it true.