Your character's memory, in your hands
Every character now has a memory book. Open it from the character's page and you will find two lists in plain words: the things they will never forget about you, and the moments they remember. Add a line, rewrite one that came out wrong, remove one, or mark a moment as something they must never forget. It is real. What you change there is what the character carries into your next message.
Two more controls live on every message in a chat. Forget takes one exchange out of the story and out of the character's memory, as if it never happened. Back to here rewinds the story to that message and lets you write the rest again. Both are yours alone; nothing is shared and nothing is kept for later unless you keep it.
Starting a new chat with a character you already know now carries the whole story with it, not just the facts about you, so the second chat picks up where the first one was. And when you correct a character about something between you, the correction now holds for good instead of fading back to the old version weeks later.
-- the developer