Keep something worth remembering about the user or their work: a preference, a fact, a decision, or a correction. Pass the passage as text, in the user's words where you can, or pass the conversation as messages with their roles, so that only what the user said or agreed to is kept and nothing the assistant suggested. The server works out what it says. A newer statement replaces an older one about the same thing, and the older one stays in the history. Restating something already known changes nothing.

Ask what is remembered, in words, before assuming anything about the user. Answers are what is believed now, as sentences. Each lists under before what it replaced and when, so a correction comes with the answer, and under elsewhere anything else believed about the same thing in other words, such as a later dislike beside a like; the newer statement usually holds. days_ago says how long ago it was stated. A time named in the question, such as "last week", is searched first. Each also gives under said the sentence it was drawn from, as the user said it. Pass as_of to ask what was believed at an earlier instant. Leave out question to get everything believed about the user, a profile to start a conversation with. Pass since to get only what changed after then, newest first: at the start of a session, since the last one, it says what is new.

Stop believing what a description names, such as "my editor" or "that I live in Lisbon". Returns what was withdrawn. Nothing is deleted: it stays in the history, and remembering it again brings it back.

How something remembered changed, in words: every statement about it, oldest first, each with what it began and ended believing, and what is believed now. Use it when the user asks what changed, when, or why something is believed, and to show a correction whole. Something since forgotten still has its history.

What was believed differently at one instant than at another: each thing that began or stopped being believed in between. Use it to say what changed over a period, such as since the last session or during an incident.