The B4 harness documented `max_index_runs` as a ceiling reached by
refusal: B1's slice sealed no delta layer into an `IndexRun`, so `submit`
returned `NotImplemented` after exactly that many group publications, and
a driver needing more had to raise the ceiling to run at all. That was
recorded as a disclosed weakening because it configured around a missing
deliverable rather than a tuning choice.
Every part of it is now false. Sealing is implemented, the ceiling is
drained by sealing rather than reached by refusing, and no
`NotImplemented` refusal remains in the engine's production paths. A
45-second soak at the default published 5,192 groups -- 81x the ceiling --
at a flat rate. Leaving the disclosure in place understates the store in
its own evidence.
The same claim appeared in `store-bench.rs`'s `configured_ceilings`
comment and in the plan's note on why `max_index_runs` became a required
bundle member; both now say the run seals against the ceiling.
`scripts/check-phase1.sh` was not prose. Its crash-matrix pending-row
check was guarded on B1 having landed, proxied by `engine.rs` no longer
mentioning `NotImplemented`. B1 landed and the token survived in a module
doc and in two tests asserting an error is *not* one, so the grep matched
and the check silently stopped running. Zero pending rows made that
harmless, but a gate condition that had inverted is worth more than the
row it was guarding. The transitional guard is gone and the check is
unconditional.
`CONTENTION_MAX_INDEX_RUNS` is removed rather than aliased: the driver
reaches a genuinely lost committed-root CAS after 11 and 12 transactions
against a ceiling of 64, reproducibly, and the row's test panics rather
than passes if the failpoint never fires. The old note measured a worst
case that could exceed 64, which no longer refuses either.
`bench/result-schema.json` is untouched. Nothing in-tree emits
`raised_because_index_sealing_unimplemented` now, but it remains a valid
declaration for a bundle that did raise the ceiling, and retiring it is a
compatibility decision of its own.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JGdH5V43XWnj1PdHqiPktQ
Levi Neuwirth
660b4c74d0