Because corrections keep history, your assistant can answer questions in the past tense:
"Where did I live in 2023?"
"What was our insurance excess as of 1 March 2026?"
"Who was the account manager for Acme before Jo?"
Under the hood the assistant calls get_as_of with an entity, a relation and an instant. Two details worth knowing:
A bare date means midnight UTC. "As of 28 July" is the very start of that day. For "as of now" the assistant passes the current time.
Two timelines. Valid time is when a fact was true in the world; belief time is when JustOnce recorded it. "What did my record say before I corrected it?" is a belief-time question — the assistant passes
as_of_believed.
The answer carries the value's validity window, a confidence, and a margin — how far ahead the winning value is over the runner-up. A small margin means close evidence, and a good assistant mentions the alternative.
A memory's own timeline is in its History view, or through get_memory_history.
ChatGPT and Codex aren't offered get_as_of. There, ask for a specific memory's history instead, open its History in the app, or ask the date question through Claude, Cursor or another client.