LastSent scanned MAX(sent_at) into a bare int64. MAX over an empty set
is one row holding NULL, so it errored where its own doc promised a zero
time. ack_sends is written only by MarkSent, which runs only after a
repeat has been sent, so the first repeat for every rule read an empty
table and RepeatUnacked returned on the error and aborted the whole
sweep. The sev4 repeat-til-ack loop could never take its first step for
any rule. nudges.go:213 documents this exact trap for MIN; ack.go never
got the same treatment.
EnqueueDigestEntry deduped on status='pending' alone. A row past its
expires_ts stays pending until the sweep marks it, and tick.go enqueues
before it sweeps, so on the tick after an expiry a suppressed nudge
deduped against a row PendingDigestEntries will never return, and the
phrasing already paid for was discarded. The read side already treated
not-yet-swept as not-deliverable; the write side did not. It also
treated any read error as no-row and inserted anyway.
ack.go had no test file at all. It has one now.
internal/memory was read and is clean, and every embedder call site
correctly passes EmbedPassage for a stored text.
(V-617)
claude
5b8707e21e