Two gaps the Task 11 re-review left open.
scopeKey guarded the empty-string tenantId but not its type, so null, 0,
false or an object flowed through un-normalised and the adapters diverged -
the db rejects on NOT NULL while memory accepts an unreachable row. The whole
premise of the empty-string guard was a caller who controls the tenant id,
and that caller can just as easily hand over a null from a JSON body.
The vacuous concurrency test was removed for good reason, but that left
nothing failing if someone re-wraps grant() in db.tx and reintroduces the
shared-connection rollback. A spy over driver.transaction discriminates that
deterministically, with no timing dependency.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
ClintchizandClaude Opus 5
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