The fact vector id carries a timestamp, so tapping the same key twice added a
row instead of replacing one and recall then scored the old value against the
current one. CorrectValue and VoidLatestFact already prune the key; an ordinary
re-tap is the third way a value is superseded and it did not.
actionFact now prunes fact:<key>: before inserting, so exactly one vector
survives per key. InMemoryStore gained the matching DeletePrefix, because a
test double that quietly kept both rows would pass a test the daemon fails.
The prune is best-effort and silent on a store that cannot do it: the fact row
is the truth, and a stale vector costs a wrong recall, not a lost fact.
Speaker profiles share the vector table with notes and facts. The doc
comment said reading them through Catalog is what keeps recall from
ranking a voiceprint. It is not. Catalog controls how speaker code reads
its own rows and says nothing about Search, which scanned every row.
What actually hid them was cosine returning 0 on a width mismatch, so a
192-dim ECAPA row scored 0 against a 384-dim query. Some x-vector
exports are 384-dim, and one of those would have surfaced speaker:kami
as a recall hit carrying the name of a person.
Both backends now skip the prefix in Search, and the prefix is one
constant in internal/memory so the store layer can filter on it without
importing internal/speaker.
Two more differences between the backends closed here. ByPrefix on the
in-memory store returned the stored metadata map by reference, so a
caller editing a returned Record edited the row, while the persistent
one unmarshals fresh. And the append to upsert change in Insert is a fix
in its own right, not only a speaker concern: any re-indexed id used to
leave a second stale copy searchable.
Found in review of #74.
Maven can now be told who someone is. She cannot yet tell who is speaking,
and this commit is careful to say so rather than pretend otherwise.
What works: profiles are enrolled from several deliberately recorded samples,
listed, and deleted. They live in the existing memory_vectors table under a
"speaker:" id prefix, so there is no migration; what that needed was a wider
interface than memory.Store, hence memory.Catalog with ByPrefix and Delete.
Delete is the load-bearing half — a voiceprint someone asked to be rid of has
to actually go, and a search-only store cannot do that. InMemoryStore.Insert
became an upsert by id to match what the persistent store already did.
What does not work, and why it is not faked: there is no speaker-embedding
model on this box. Sixteen ggufs in /mnt/hdd1/llms, all text; no ECAPA, no
x-vector, no titanet, no wespeaker, no .onnx anywhere under /mnt/hdd1. So
newSpeakerEmbedder returns nil, internal/speaker falls back to
speaker.Disabled, Identify answers ErrDisabled, and the daemon logs which
half is off at startup. The plan's "simple MFCC + GMM" floor is refused in
the package comment: MFCC cosine distance detects channel and loudness as
much as voice, and a biometric that is confidently wrong writes false claims
about named people into his memory. A bad floor is worse than none here.
Refused as well, and the reason is in enroll.go's doc comment: the plan asked
for unknown speakers to be enrolled on first interaction with a TTS "кто
это?". There is no request shape in the protocol that could express that.
Taking a biometric of whoever walks past the microphone does it to guests who
are not party to the exchange, and a synthesised question into a room is not
consent from whoever answers.
Authority: enrolment is AuthStepUp, because it is a deliberate sit-down act
that writes a biometric of a named person and never something done by voice
mid-conversation. Deletion is one rung lower at AuthWrite, deliberately
inverting the usual pattern — getting rid of a biometric must never be the
harder half. Listing is AuthRead and never returns the vectors themselves.
Off unless configured: no speaker block means the three methods answer
ErrUnknownMethod, so a default box has no wire path that takes a voiceprint.
make build and make test pass.
Vikunja #255
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TrVSBKe3RFDF4fGYKWYQnX
claude
kami