`store-bench` opened its measured store with `ENGINE_MAX_INDEX_RUNS =
1_000_000` against a store default of 64, carrying the comment "raised because
index-delta sealing is unimplemented". Sealing landed in fef8520, so the reason
had lapsed and two things followed that did not follow before: the emitted
`index_run_ceiling` named a reason that was no longer true, and at an
effectively infinite fan-out ceiling no seal in a measured run was ever
triggered by fan-out pressure, so `index_maintenance: runs_sealed` was earned by
entry pressure alone.
The raise is dropped rather than the enum renamed, so `bench/result-schema.json`
is untouched and no contract review was needed. The store opens at its own
default and the derivation reports `store_default` from the comparison it
already made.
Demonstrated rather than assumed, because the whole question was whether a run
survives the ceiling the raise existed to escape. A 45-second submit-path run at
`max_index_runs = 64` published 5,192 groups - 81x the ceiling - with no
`NotImplemented` refusal, and its rate was flat against a 5-second run at the
same ceiling (113.2/s vs 117.7/s). Both figures are debug-build and diagnostic
hardware and are evidence of survival, not of throughput. The emitted bundle
declares `index_run_ceiling: store_default` against a configured ceiling of 64,
with `index_maintenance: runs_sealed` alongside.
The raised branch of the derivation does not become dead code. The existing
fixture keeps covering it and `a_run_at_the_store_default_declares_store_default`
covers the branch a real run now takes, because a comparison needs both sides
exercised. The constant survives as a test-only value under a name that says so,
rather than being deleted and leaving the branch reachable only from a
configuration nothing produces.
The rationale block above the run is corrected too: it counted two of B1's
deliverables as bounding the bundle when only checkpointing still does, and it
still described the ceiling it no longer raises.
check-phase1.sh reports GATE_EXIT=0; verify-store-recovery.sh --cycles 2 reports
matrix=pass, bundle=schema-valid, acknowledged_loss=0, torn_transactions=0,
VERIFY_EXIT=0.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Levi Neuwirth
d36f6a86f7