The dedup path claimed it directly, so a key could be answered Ok pointing at an entry a failed persist never wrote. Write-back is now guarded and three-valued, and landing one request split out of the scan pass.
SetProjExtState's return covers the whole extname, so it never saw one key. The persist verdict now reaches the report, and a throw mid-write no longer claims the landing left nothing behind.
Splits Ignore into unreadable vs not-a-request and counts every verdict; the report prints only when the pass answered nobody, so its absence proves the action never ran.
Rewords Cleared/Unanswered/ForeignRequest to name only observed facts and every live hypothesis instead of picking a winner; adds a guarded answeredOutcome accessor against a future unhandled BakeAnswerKind; folds an unreachable BakeScanKey/Context test state; fixes generation-stamp timing.
A no-answer stays a failure; it now says whether the extension never ran the landing, answered a stale generation, spoke a wire this build cannot read, cleared the request, or refused it.
daniel