The acquisition recorder proved the previous diagnosis wrong: the 03:00 MLB
attempt acquired 6,365 props from a propline cache hit and CONTINUED. Zero
reached the first grading callback, and nothing durable says why.
WHY REPLAY WAS IMPOSSIBLE. The 03:00 input was the cache object written
02:20:24.889Z. ODDS_CACHE_TTL defaults to 3600s, so it expired ~03:20; it is
now gone. No historical copy exists: closing_captures holds no MLB rows past
01:40:52, model_snapshots none, and `bookprices:mlb` carries no timestamp the
book-comparison route exposes. Calling /api/odds/mlb was REFUSED — a cold cache
would fetch and fire recordDownstream -> gradeAndCacheSlate, writing product
state and manufacturing a false recovery. So the input is NOT RECOVERABLE and
no replay was attempted.
A SECOND CLAIM IS WITHDRAWN. The previous tranche concluded "all 6,365 props
were rejected at event admission", reasoning that dedupe cannot empty a
non-empty list. That is FALSE: `dedupeProps` also FILTERS — it drops props with
no player/stat_type/line and any prop whose book is not a MODEL book. A fully
admitted cohort can still dedupe to zero. Demonstrated in test. So the failing
branch was never established, only assumed — which is exactly what the order
forbade, and why DEDUPE_EMPTY is a first-class outcome here.
THE REGION IS SMALL AND EVERY BRANCH LOOKS IDENTICAL FROM OUTSIDE:
identity annotation (runSnapshot, mlb only, own catch)
-> admitForGrading (pure, can throw)
-> dedupeProps (pure, can throw, ALSO filters)
-> mapLimit(gradeBestSide) <- first onGraded-capable call
gradeAndCacheSlate swallows every throw in that region and returns the same
{written:false,count:0} it returns for an honest zero.
The recorder distinguishes them: READY_FOR_GRADING · ALL_REJECTED ·
IDENTITY_STAGE_ERROR · ADMISSION_STAGE_ERROR · DEDUPE_STAGE_ERROR ·
DEDUPE_EMPTY · NO_INPUT_PROPS · OTHER_PREGRADING_ERROR. An exception is never
folded into ALL_REJECTED, and with no admission evidence the classifier refuses
to classify at all — a test pins that.
EXCEPTION SEMANTICS UNCHANGED. Each stage is wrapped to record and then RETHROW
the identical error, so the enclosing best-effort catch still handles it exactly
as before: nothing caught that was not caught, nothing swallowed that was not
swallowed. Admission and dedupe rules, the impossible-binding invariant, event
identity, model books and the first-row-wins cap are untouched — the only
behavioural lines in the diff are `const gate/unique` becoming `let`.
Correlated to the SAME snapshot_attempt_id the acquisition recorder minted — not
a new run id — and stored under its own key `ops:pregrade:{sport}` so it can
never displace the acquisition record. Same atomic LPUSH/LTRIM pattern, bounded
per sport, scheduled-only, best-effort at the call site, auto-disabled under
test.
CAUGHT DURING BUILD: `savePgTrace` was defined and NEVER CALLED — the recorder
would have persisted nothing, the same "built, correct, never invoked" failure
this programme has hit before. A test now drives the real runSnapshot and
asserts a trace is persisted carrying the acquisition's attempt id.
Ten teeth, injections verified present, against a green baseline:
empty collector read as ALL_REJECTED (2) · admission throw reported as
admitted=0 (1) · dedupe throw reported as output=0 (1) · dedupe-to-zero
mislabeled as rejection (1) · identity exception hidden (1) · observer reorders
the candidate array (1) · trace failure changes product outcome (1) · intraday
overwrites scheduled (1) · different attempt id (2) · secret leak (1).
Restored byte-identically.
THREE OF THOSE LANDED AND PASSED FIRST TIME — coverage holes, not safe defects:
the dedupe-throw and identity-throw tests only exercised the recorder directly,
never the real path, and nothing asserted the CANDIDATE array is not reordered.
All three closed with real-path tests, then re-run failing.
Two stale source assertions updated with the reason recorded: both pinned the
exact `const gate = …` / opts-key order that the recording wrapper changed.
387 suites / 5,237 tests pass. web tsc exit 0. Lineage stays OFF.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CQJeAG8vcDoL5zkiaJyVb8
builtbykev
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