BIO tags had no Maven-domain corpus, which was true of found corpora and
false of made ones. A GBNF closed over Maven's five slots plus a
substring check gives 2178 spans out of gemma-4-12b at no second call.
Three heads over one forward pass: intent 92.8%, destination 82.8%, slot
span F1 72.4% over three seeds. The slot head is free.
Epoch selection reads the intent dev slice, so it stops the slot head
about 4 points early. Recorded rather than fixed.
The 2026-08-07 week of usage was typed by hand and cannot be replayed, so
it measured a build and not a change. scripts/usage-run.py drives the same
reach from a turns file, which makes the next run a diff.
Baseline is master at beb093a: 140 turns, p50 1.6s, zero errors. Three
defects to move. A parked reminder clarify contaminates 19 later turns and
survives a day boundary. Query sources that guess claim six turns they
cannot answer, which is the class V-655 removes. And one question was read
as a capture.
Also records the slot head: gemma distils 2178 spans, three heads score
intent 92.8%, destination 82.8%, slot span F1 72.4% over three seeds.
The first 120 floor rows carried one sentence shape, because the generator
varies a topic and ambiguity is not a topic. Rotating six shapes takes the
floor 3/7 to 6/7 and the destination mean 75.8% to 80.8%.
Calendar stays 3/6 at every seed. The possessive agenda rules claim those
cases at stage 0 and name nothing, so no label reaches the head.
Also corrects the floor-case count in three files: five of the seven are
homelab, not six.
Step 3 of the routing-heads plan. Intent and destination share one masked mean
pool on e5-small. Destination scores 26/33 against 12/33 for the classifier
cascade and 24/33 for the cascade with gemma-4-12b, which is the teacher these
labels were distilled from. Recall goes 0/15 to 15/15.
Two heads, not four, and both cuts are label problems rather than GPU time.
Mood describes her own reply state and no dataset maps onto it. BIO slot tags
have no Maven-domain corpus.
The MASSIVE warm-start from step 2 is worth nothing here either. Stock ties it
on intent and leads by a third of a case on destination.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN
The training workspace labels with routeSystem and routeGrammar, and it held
its own copies. V-660 changed both. A retyped prompt drifts silently, which is
the problem llm/check_prompt_parity.py exists for on the other side.
Inert unless MAVEN_DUMP_PROMPT names a directory.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN
Numbers and the argument in docs/evals/2026-08-08-destination-model-arm.md,
pointer and the short version in CLAUDE.md. The finding worth carrying is
not the 72.7%: it is that stage 0's silence on the possessive agenda rules
used to be free and now costs four destination points, because there is
finally something downstream that would have named the calendar.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN
V-659 measured the destination at 12/33 on the classifier cascade and named
the gap: recall 0/15, because nothing anywhere names it. The model could not
help, for a structural reason rather than a capability one. Nothing in
routeSystem mentioned a Source and routeGrammar could not emit one, so there
was no string for it to write. Same shape as the Praxis reach V-517
measured at 0/12.
routeGrammar grows a source rule, closed over router.Sources plus the empty
floor. A grammar cannot emit a destination that does not exist, which is the
guarantee V-546 wants from a softmax and gets here for free. The prompt
lists the twelve in Russian, one line each, and says plainly that "" is a
normal answer to give often: two sources that can both answer means the
chain walks, and guessing is the failure mode this whole field exists to
stop.
The read-back goes through ValidSource and runs on IntentQuery alone. The
grammar already bounds the enum, but it is a request to a server that may be
running another build, and only a query reaches queryWalk.
Measured against gemma-4-12b on the workstation, same fixture, cascade with
a hash fallback: destination 24/33 (72.7%) against the classifier's 12/33,
and intent 81/96 (84.4%) which is where it already was. Recall is the whole
move, 0/15 to 14/15. The model alone scores 26/33.
Four cases the cascade loses and llm-only wins are calendar. The possessive
agenda rules claim them at stage 0 and deliberately name nothing, because
"что у меня в списке покупок" matches the same rule and naming the calendar
would take the list source off the turn. So stage 0's caution now costs four
destination points it did not cost before. That is a real trade and it wants
its own argument, not a quiet edit here.
The resident Qwen3-1.7B is unmeasured: it binds --port 0 inside the
container and no host process can reach it.
llm/check_prompt_parity.py in the training workspace compares its copy of
routeSystem to this one and will fail until that copy gets the same edit.
V-362 covers the catch-up.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN
CLAUDE.md said the destination had no fixture and no accuracy number. It
has both now: intent 73/96 and destination 12/33 on the classifier cascade,
with the per-destination split, the floor cases and the grammar drift the
labelling turned up. Anyone adding a grammar now reads that baselineGrammars
mirrors buildRouter and drifts silently when it does not.
docs/evals/2026-08-08-massive-warm-start.md was written on the V-655 branch
and parked in .task/, which git excludes, so it was one `task start` away
from being lost. It is a dated measurement and it belongs under docs/evals
whatever branch produced it. Its "destination has no fixture at all" line is
now a pointer to the file beside it.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN
Twenty-eight existing query cases get a want_source and five new ones
arrive with theirs. Every label is the destination that SHOULD claim the
turn, which on the five new cases is not the one that did: they were
observed failing on the box on 2026-08-07, so the fixture fails on the day
it is written.
Seven cases assert the SourceUnknown floor, and six of those are homelab
operations. They cluster because SourceRecall, SourceNetwork and
SourceAttention overlap on every question about the box: mavpoll writes its
netdata and uptime-kuma observations into the fact store recall reads.
Naming one destination there takes the other two off a turn that needs
them. That is a finding about the enum, not a gap in the labelling.
The fixture's grammar mirror had drifted. WorldQueryGrammars went into
buildRouter with V-655 and never into baselineGrammars, so the fixture was
scoring a grammar set the daemon does not run — the exact thing the comment
above that function forbids. Adding it moved the destination number 9/33 to
12/33 and moved nothing else.
Measured classifier+onnx: intent 73/96 (76.0%), was 69/91 (75.8%). Four of
the five new cases pass and no existing case moved. Destination 12/33
(36.4%), and the split is the point. World is 5/5, because a stage 0 rule
names it. Calendar is 2/6, because the possessive agenda rules deliberately
do not. Recall is 0/15, because nothing anywhere names it yet.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN
The fixture measured the first half of a route and stopped. V-655 split a
routing decision in two, and the second half arrived with no fixture, so
Decision.Source had no accuracy number at all.
want_source is a pointer because the destination has three states and a
bare string has two. Absent is every intent but query, which never reaches
queryWalk. Present and empty is the SourceUnknown contract: name nothing
and let the daemon walk the chain, which is right whenever two destinations
can both answer and the utterance does not choose. Present and named is a
destination the route must produce.
A destination miss does not fail the case. It goes in SourceReason, never
in Reasons, so Accuracy and IntentAccuracy stay the numbers they were and
69/91 still means what it meant. SourceAccuracy is the second number, over
the labelled cases only, because a percentage of the whole fixture would be
a percentage of turns that never ask a query source.
A clarified or mis-routed case still counts in the denominator. It named no
destination and that is a miss, not a case to skip, or the denominator drops
every turn the route already lost.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ptwopxyo3Z2kwFckHkLvN
querySources splits in two once you look at which sources over-claimed during
the week of 2026-08-07. The clean ones perform a lookup and can come back
empty: fact-by-key, tasks, list, money, calendar, notes. The dirty ones decide
by cosine against frozen seeds and then answer whatever they claimed, because
they have no lookup that could miss. Weather has no local table at all, which
is why "что такое TCP?" became "для какого города?".
So each source now carries its destination and whether it guesses, and
queryWalk takes the guessers that were not named OUT of the chain. It removes
and never reorders, which is the whole safety argument: the table's order is
load-bearing, every comment on it argues a reason between two sources, and
above all it carries "his data first, then the world". Naming SourceWorld does
not send the turn outside. It stops weather claiming a protocol on the way
past. His notes, his facts and the boundary in front of them still run first,
so a wrong destination costs nothing but the guess it prevented.
The skipped sources are recorded as never-asked with the reason, so /trace
shows a narrowed walk rather than a chain that silently shrank.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
A question was sorted twice. The cascade picked one of seven intents with
stage 0 rules, the resident model and the classifier behind it, a 91-case
fixture measuring it and the decision trace recording it. Then IntentQuery
handed the turn to a second dispatch in the daemon, twenty-two branches
deciding by seed similarity in a fixed order, with none of that. The careful
sorter did the easy half.
Decision grows a Source: twelve destinations, not twenty-two, because the
recall passes are one destination from the outside and so are the three world
sources. Empty is a real value and it is the floor — nothing names one, the
daemon walks its whole chain, and that is exactly what shipped before.
Stage 0 fills it where a deterministic rule already knows. Two new world rules
for the shapes measured failing on the box on 2026-08-07: "что такое TCP?" and
"кто такой Линус Торвальдс?" were answered by weather and by the personal
boundary, and "сколько будет 17 на 23?" was answered "для какого города?".
The calendar noun rule and the closed event-noun rule name the calendar. The
possessive agenda rules deliberately do not: "что у меня в списке покупок"
matches agenda-query, and naming the calendar there would take the list off
the turn.
Fixture unchanged at 69/91, which is the point — it scores intent, and none of
these cases changes intent.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
A side query suspends the parked question rather than dropping it. Nothing bounded that. No attempt is spent, so MaxAttempts never applies, and noteSuspended restarts the 90s clock, so the TTL cannot arrive while he keeps talking. Measured 2026-08-07: one unfilled time slot rode the tail of six consecutive unrelated replies.
PendingQuestion.Suspends counts the step-asides, MaxSuspends is 3, and past it she lets the request go with the same clarifyDropped line every other drop uses. The count is of consecutive step-asides and resets the moment he answers.
Also splits the re-ask off the answer into its own sentence. The comma splice buried the question in the tail of a reply about something else.
Two untracked files left in the tree by the audit session. They are the evidence behind V-654 and several sibling tasks, so they belong on master rather than inside the PR that fixes one of them. Dated eval files under docs/evals/, so they are never edited after the day.
Two commands replace work that 66 sessions of transcripts show being
redone by hand.
`make t` replaces the CGO preamble, pasted 391 times across past
sessions and documented in CLAUDE.md as the way to do it. It also sets
MAVEN_ONNX_LIB, which that recipe did not: the four TestONNX*
measurements self-skip without it and the run still prints "ok", so
every targeted eval done the old way reported the hash ratchet while
reading as a real embedder score. -race keeps it honest against `make
test`, -count=1 keeps a stale cache from passing as a result.
`make audit` replaces the inventory sweep. The four longest sessions
spent 93 greps rebuilding it before their first edit. Runs in 0.75s.
Its stub search is narrower than the sweeps were, on purpose. "not
wired" is this repo's word for a nil dependency and matched ~30
comments describing working code; "placeholder" names real identifiers
and matched 16 more; internal/ipc/unimplemented.go is the deliberate
Unimplemented*Server pattern, not 60 gaps. A gap report that reports
the architecture back at you is one nobody reads twice.
Telegram was the only way off this box, and it is not a direct path: it
needs api.telegram.org, a socks relay on the host and a matching ufw rule.
Each of those three has failed once, and when they do a sev4 nudge has
nowhere to go. ntfy shares none of them.
The spare is the smaller half of it. The routing table already sends
sev3-away nudges and away reminders to ntfy and to nothing else, so with no
block configured those two routes hit a nil sink in DispatchNudge and
DispatchReminder and are skipped — no log line, no delivery_attempts row.
An away reminder is worse than dropped: out stays empty, so MarkReminder
never runs and it re-fires every tick without ever being delivered.
Owner's call, 07-08-2026: ntfy.kvmx.ru, topic maven.
The sink now takes a bearer token, which is what that server wants and what
it could not do before. ntfy scopes a token to one topic and to write-only,
so a popped sink can push to the maven topic and cannot read it back. Basic
auth stays for a server with no tokens; configuring both is refused rather
than resolved by guessing.
Config keys got json tags. docs/operations.md has documented this block as
base_url/topic since before it existed, and the untagged struct would only
have answered to BaseURL/Topic — the documented config would have parsed
into an empty one.
The token is a ${NTFY_TOKEN} expansion from the gitignored
deploy/telegram.env, beside the telegram secrets. TestDeployConfigLoads now
fails if the block goes missing, because deleting it is how you turn the
reach off and the two silent routes are what that costs.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YMNNEkYx1mZFtHNrFk7uqb
Owner's call, 07-08-2026. A completion summary written into the
description on the way out is lost anyway, and the durable record is the
commit messages and the merged PR.
Written during the V-641 session and left uncommitted; it rides this
branch rather than being dropped.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YMNNEkYx1mZFtHNrFk7uqb
Search decoded the vector blob into a []float32 and JSON-unmarshalled the
meta map for every row, then sorted all N and threw away everything past
topK. Meta only ever matters for a survivor, and the sort answered a
question a bounded heap answers cheaper.
The scan still visits every row — that is what picks the winners. What it
no longer does is allocate for a row it is about to discard. dotBlob reads
the vector out of its stored bytes, so scoring costs nothing; a row is
copied and its meta unmarshalled only once it has entered the topK.
At 10000 rows and topK 10: 70.6ms to 26.8ms, 58MB to 17.5MB, 240k allocs
to 60k.
Recall is unchanged where it is measured. recall+onnx scores 22/32 with
recall@1 70.4% and recall@3 85.2%, identical to before.
TestMemoryStoreSearchMatchesNaive pins the ranking against the full-sort
implementation it replaced, and TestDotBlobMatchesDot pins bit-identical
scores, which the 0.008 gate margin demands.
One behaviour did move: ties. sort.Slice is not stable, so equal scores
were ordered arbitrarily; the heap now keeps the earliest. Under the real
embedder an exact tie is a duplicate vector and nothing moved. Under the
hash embedder the eval's floor uses, everything ties at 0 and that run's
recall@3 went 74.1% to 81.5% — a number that measures tie order, not
retrieval. recall@1 and false recall, the two the eval asserts, are
unchanged on both runs.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YMNNEkYx1mZFtHNrFk7uqb
MemoryStore.Search is on the per-turn recall path and had no benchmark, so
any claim about its cost was an argument rather than a measurement.
Seeds a store with rows the shape recall actually stores — 384-wide
vectors, the resident embedder's width, and a meta blob carrying the note
text — at 1000 and 10000 rows. 10000 is the ceiling the type doc claims a
full scan is fine at.
Measured as it stands: 5.3ms and 24k allocs at 1000 rows, 70.6ms and 240k
allocs at 10000.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YMNNEkYx1mZFtHNrFk7uqb
webfetch.Fetcher.last held one entry per distinct host the crawler ever
dialed, never pruned. Bounded in practice by how many hosts get crawled, but
crawl.on_demand is true in deploy, so the host set is whatever he names out
loud.
An entry older than HostInterval cannot delay a request — waitTurn would let
the next one straight through — so it is dropped. The sweep runs on write and
only once the map passes 64 entries, below which walking it costs more than
the entries do.
Rate limiting is unchanged: a host dialed inside the interval is kept, which
the test asserts, because pruning one would hand out a free turn.
rss.Poller.seen held every undated item ever seen, one entry per id, for as
long as mavend ran. fresh() added and nothing removed. A feed that ships items
with no <pubDate> grew it forever.
seenIDs is the same set with a bound: the map answers the lookup, a slice
remembers insertion order, and the oldest id falls out past 512. The cap has
to stay above any one feed's front page or an item still listed there would be
written a second time, and a few hundred covers the largest page anyone
publishes. The set only ever had to span one poll window plus the resync
guard, not all of history.
Dedupe behaviour is unchanged. The comment at fresh() explains why the set
does not survive a restart; it never bounded it within one run.
mavcaldav was built, in `make build`, listed in CLAUDE.md's daemon table, and
deployed nowhere. Not commented out the way mavmaild is, which at least
records the decision and the enable steps. Built and mentioned nowhere is the
worst of the three states, so this writes the decision down.
The box has no CalDAV account, so the block stays commented. It names what the
absence costs, because both costs are invisible from the daemon table. Agenda
questions route correctly and answer from nothing: stage 0 sends "что у меня
сегодня" to IntentQuery (V-498) and the calendar query source then reads facts
nobody writes. And loop.State.CalendarBusy is fed by those same facts, so the
gate's "do not nag mid-meeting" is permanently false.
CLAUDE.md said the absence was an oversight. It is a decision now.
mavcaldav took -pass and -render-pass as flag values, so enabling it would
have put his calendar password in `ps` inside the container, in the compose
file, and in shell history. mavpoll and mavmaild both read their secret from
a file for exactly that reason.
readSecret reads once at start, trims, and refuses an empty or missing file.
An empty file is a deployment mistake, not a password, and basic auth would
otherwise send "" and collect a 401 every poll. A rotated password means a
restart, which is cheaper than re-reading the credential every five minutes.
Nothing called the old flags: no compose service, no systemd unit, no test.
So they are replaced rather than kept beside the new ones.
`SetMaxOpenConns(1)` under WAL gives up concurrent reads, and the task
asked whether that costs anything. Measured over a fixed two-second
window, a paced writer against a read loop, three runs per cap:
reads do not queue. Four connections buy 70µs at p50 on a turn that
spends 1.19s in the resident model, and write throughput more than
halves. A 19ms worst case also cannot be the source of the 2.7s router
figure, so that line of enquiry is closed.
What the cap cannot survive is a long-lived transaction. It holds the
only connection, so a second read never completes: two seconds and
`context deadline exceeded`, against 1ms at a cap of four.
`Store.DB` handed out exactly that transaction. It had been there since
the initial commit with no production caller, and its comment described
a loop that never materialised. Its one user was a test helper reading
`delivery_attempts` by raw SQL, which `ListDeliveryAttempts` has covered
since V-390. So the cap stays and the seam goes, and the hazard is gone
by construction rather than by documentation.
`internal/store/conncap_test.go` stays as the standing measurement,
skipped under -short. The comment at the cap and the one in
`internal/ipc/server.go` that leans on it now state the invariant and
cite the numbers.
Measurement: docs/evals/2026-08-07-store-connection-cap.md
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
`tick` read `PendingFactResolutions` at the scan limit, then `status`
read it again with the same limit for one log line. Up to 2000 rows per
tick on a database that serialises reads, to say how long the queue is.
`statusOf` counts over a batch the caller already holds, and the tick
passes it the batch it just read. A resolved fact leaves the queue, so
the loop collects what is still pending rather than reporting the
pre-tick count. `status(ctx)` stays as the querying form, for a caller
outside the tick with no batch in hand.
No behaviour change: the three counts still describe one row set, and
the same facts are attempted per tick.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
The table listed nine binaries. make build builds eleven, and mavseal and
labelgen exist without targets. The running count said seven on homesrv;
docker-compose.yml runs five.
Adds mavgpud, mavupdate, mavseal and labelgen, and names why each absent daemon
is absent: mavmaild has no mail account, mavwaked and mavenclient belong on
workpc, and mavcaldav is an oversight (V-644).
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
The push half accepts an @channelusername and the intake half cannot: an
inbound update names its chat by number, so an @-name matches nothing. The
check lived in NewPoller, which wireTelegramIntake logs and returns from, so a
box configured that way booted clean with a dead intake half and a working push
half. Nothing looked broken from the chat.
ValidateIntakeChatID moves the rule where config validation can reach it, the
same shape validateNetScan uses. It is stricter than the old prefix test: any
non-digit is refused, not just a leading @. An empty token or chat id still
means telegram is not wired, because an unset ${TELEGRAM_*} expands to empty
and that must not fail a box with no bot.
deploy/mavend.json turns intake on. The chat id on this box is numeric.
The onCallback comment claimed every path answers the callback. The fromOwner
early return does not, and silence toward a stranger is correct, so the comment
was what was wrong.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
A repo-wide sweep on 06-08-2026 at 06c1cf2. Three docs, three tasks.
docs/plans/24-no-deadline-on-the-turn-path.md (V-638). Nothing between a
mavweb handler and llama-server can be cancelled, and one hop has a timeout.
Replier takes no context, the ipc client sets no conn deadline and checks ctx
once, and the ipc server dispatches under Background. Four commits, and the
pattern to copy is already in internal/voice/client.go:101.
docs/plans/25-the-two-boot-paths.md (V-639). The passkey-unlock path starts
seven workers outside the WaitGroup that shutdown waits on, shadows that
WaitGroup at main.go:529, and builds a daemonAPI with no nexus and no
getMCPServers. Latent, because db_key_env means the box boots unlocked.
docs/evals/2026-08-06-routing-trajectory.md (V-464). The deterministic path
and the cascade now score the same 69/91, and the cascade has not been
re-measured since V-626 and V-627. Either the model still earns its place or
it is costing 1.17s a turn for nothing. Dated, so it is not edited later.
Committed with --no-verify, on the owner's instruction of 06-08-2026. The
pre-commit hook refuses master and the alternative was three PRs for three
markdown files. Markdown is already exempt from the size cap for the same
reason: docs land as one batch.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Two defects my own review found.
The push half accepts @channelusername as a destination. The intake half
cannot: an inbound update names its chat by numeric id, so that config would
read the chat, match nothing, and answer none of it. Refused at NewPoller,
which turns a dead reach into a line in the log.
And getUpdates returns at most 100 updates per call, so one call was not the
backlog. The skip loops, bounded at ten rounds rather than until empty, so
an instance that keeps handing back a full batch cannot spin.
The correction gesture now reaches all three surfaces, and CLAUDE.md said
only /chat had it. Doc 23 carries the decisions: long-poll rather than a
webhook, the backlog dropped on start, one accepted sender, and the two-tap
keyboard.
It reaches the daemon through ipc.CoreAPI and nothing else, so a telegram
turn takes the path POST /api/chat already takes: Chat returns the reply and
the trace id it collected off the context (V-630), and CorrectTurn writes
the label. Nothing in internal/delivery learns what a handler is.
Wired on the unlocked start and on the passkey unlock, like the mail intake,
so telegram behaves the same either way. A sink that will not build is
logged rather than fatal here, because wireDispatcher already failed the
boot on the same config.
The cases that matter: the turn runs with the chat as its dialogue id, the
reply carries the gesture, a turn nothing persisted carries no buttons, a
stranger gets no answer at all, the first tap writes nothing, and a write
that failed says so on the button instead of going quiet.
An httptest server that hands out one batch of updates per getUpdates call
and records everything else, plus a recorder for what the poller asked the
daemon to do.
Long-poll getUpdates rather than a webhook: the box takes no inbound
connections and reaches telegram through a relay, so the direction has to
stay outbound. A failed poll waits and retries, because the relay going
down is the normal cause and it comes back on its own.
The backlog is discarded on start. Telegram holds undelivered updates for
24 hours, so a daemon that was down overnight would otherwise answer every
question in order, and a reminder set from an eight-hour-old message lands
at the wrong time. Missing it is the safe direction.
ChatID is the only accepted sender and anything else is dropped without a
reply, because a reply confirms the bot exists and whose it is. Chat ids are
not guessable but they are not secret either, so that is the whole
authorisation and it is an allowlist of one.