You import a year of history on a Tuesday. Every one of those memories was
recorded on Tuesday and happened months apart, and almost every interesting
question is about the second clock.Three controls use the two clocks, and mixing them up is the usual bug.
client.record_batch(space_id=space, items=[ {"content": "The June offsite settled on the pricing overhaul.", "timestamp": "2026-06-10T09:00:00Z"}, {"content": "The December board meeting approved the London office.", "timestamp": "2025-12-04T15:00:00Z"},])
timestamp is yours to set and means when it happened. The record time is the
system’s and you cannot set it.
client.retrieve(space_id=space, query="what was decided?", as_of="2025-01-01T00:00:00Z")
as_of is record time, not event time. Both rows above were written today,
so a year ago the space knew nothing — and returning nothing is correct. This is
the control people expect to filter by event date, and it does not.
as_of and occurred_before answer different questions and look identical
at the call site. “What did we know then” is as_of; “what happened then” is
occurred_*. Choosing wrong returns a plausible, wrong answer rather than an
error.
Undated writes collapse to their write time, so a backfill without
timestamp makes every temporal question unanswerable and there is no bulk fix.
An event-time filter narrows hard. If a window returns less than you
expect, check the memories actually carry event time before tuning recall.
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