The born-pinned gate audited the mem engine against the contract and
ADR-024: the conformance read clean in mechanism substance (queue
state machine, scheduler collapse, outbox, streams, locks, clock,
validation, tx overlay, wake substrate — incl. a full guard-order and
panic-hygiene audit); the suite's third column read row-by-row and
25/25 green under the per-test current-thread flavor (24 engine-shared
rows + mem's payload_too_large non-occurrence arm + the factory-shape
test); three-way arithmetic equivalence green on all columns; the
wasm32 acceptance items verified (compile-clean, tokio sync+time,
no blocking, flavor enforced); the rider's two arms verified (Finding
1 discharged; Findings 2-3 stay parked for wave 7); workspace gates,
taskgraph validate green.
Three edge-domain fixes landed inline: the stream cursor read's
i64::MAX overflow (Bound::Excluded), trim_to's i64::MAX horizon
endpoint (Bound::Included), and the scheduler register path now
rejecting a parseable interval whose first boundary overflows with
InvalidSpec — the one engine-vs-engine divergence the read found,
aligned into the class-1 window — plus a pinning test and scaffold-
residue doc/comment cleanups (clock allows, tx per-stream wake
comment, wakes/stream module docs). Recorded findings with
dispositions in the task's Notes for the wave-7 pre-release pass:
the multi-thread publish-to-wake ordering tolerance, the heartbeat/
save_offset/EventReceiver-try_recv ADR-023 §2 classification gaps,
and the mem arithmetic being a suite-pinned transplant.
Verified: cargo build; cargo test --workspace green (mem 101 lib +
25 suite, sqlite 191+25, pg 124+25+9 server-less, core 25, harness 3);
clippy --all-targets -D warnings clean; fmt clean; taskgraph validate
(61 tasks). Gate record: tasks/review-wave-6.md (Notes + Summary),
implementation.md wave-6 row + review-rounds entry.
The queue mechanism (ADR-010 state machine over the in-memory job
table, mem's third-owner equal-jitter curve + opts resolution)
already landed implemented with the seam task's whole-engine scope
(mem-engine-seam-tx Note 1); this task's work, per the disposition the
notify/listen twin recorded, was reconciling the description's pin
list against the existing suite and adding the missing engine-side
unit pins — no production code changed, the realization verified
correct as-found.
Already pinned by the seam task (reconciled, recorded in Notes):
lifecycle + stamps + resolved get_job values, claim ordering, extent
clamps at entry, worker-id validation, the uniform validity predicate,
late-heartbeat refusal + absolute-reset renewal, reclaim-eats-attempt
+ loser-ack-refuses, the pinned dead-letter default strings, dead-row
get_job visibility, both-states sweep + retention + scoping, the tx
stamp shapes, and the resolution legs + base-5 curve range/cap/spread.
Added (6): the in-process claim-race atomicity pin (8 concurrent
workers over 4 rows — every row handed exactly once through the
guarded section, the description's claim-vs-claim bullet); the
claim-vs-expiry boundary determinism pin (at now == deadline: the d <
now reclaim predicate and the d >= now holder-op predicate are
coherent — no reclaim, heartbeat/ack still valid; one second past:
reclaimable with its attempt consumed; lapsed ids silently uncounted
by ack_batch); the engine-side mirror of the suite's
backoff_curve_equivalence row — base 2 s at [1,2]/[2,4]/[4,8] driven
end-to-end through claim -> retry(None) -> get_job's run_at with the
Some(5)-verbatim and Some(0)-ready-now override legs, exact under the
frozen clock — both through the handle and pinned at backoff_delay_s
itself (the cap leg stays in resolution.rs's base-5 pins per
suite-opts-backoff-rows' recorded disposition); the D-12 pre-claim
sweep pin (a lapsed row with its budget spent claims nothing and
dead-letters with the exhaust string at the next claim, never
strands); and unconditional cancel across both states (the holder's
post-cancel ack refusing — the not-an-interrupt honesty). One
test-authoring note recorded: heartbeat's absolute reset moves the
deadline, so boundary legs stage on fresh rows to keep each
observation exact.
Task file: status completed, Notes (the seam-carried disposition +
reconciliation inventory + the six adds + the heartbeat-observation
note) + Summary filled. Verified: cargo test -p alkstore-mem 97/97
(91 + 6 new; new tests green solo x3), workspace cargo test green
(core 25, suite-harness 3, mem 97, pg 124+25+9, SQLite 191+25),
clippy --all-targets -D warnings clean, cargo fmt --check clean,
cargo check --target wasm32-unknown-unknown -p alkstore-mem clean
glm-5.3-flash