Phase 3 Task 7. Regression net pinning the #485 negative on every FetchAndCache seam —
nothing rebuilds, nothing is torn down on a failure: (1) a null fetch mid-steady-state
(all endpoints down / NotFound / SHA mismatch — indistinguishable to the actor) keeps
the served address space and revision (no RebuildAddressSpace for the failed revision);
(2) a zero-length blob handed to the actor fails via ReconcileDriversFromBlob's own #485
guard, independent of the fetcher's null contract; (3) a corrupt cache at boot (surfaced
as GetCurrentUnkeyedAsync == null) lands Steady-no-revision and applies NOTHING — never
a partial address space. No new mechanism; all green as a net. Removing the #485 empty
guard reddens the zero-length test.
Claude-Session: https://claude.ai/code/session_01GASWkNEi68FSCtvr6rLoEW
Joseph Doherty
fc568ae0fa