A face or cover photo whose host has lost the file is found on another server that holds the same blob. "No avatar for karnage?" (Adam, 2026-11-02): his kind 0 names a picture and a banner on media.21media.to, and that host answers "The requested blob was not found" for both — while blossom.primal.net, the server he publishes in his kind 10063, still has them, which is why other clients show his face. A picture named by its sha256 is a Blossom blob, served under the same name by any server holding the bytes: when the thumbnail maker finds the host without it (a 404, or a host that won't answer), the blob is looked for on the person's published servers and then the public ones we know, asked together, and the first that answers stands in — the thumbnail is made from it, the profile page's big face and banner paint from it, the feed's warm-up loads it — and the find is remembered on the device so the search runs once. tools/blob-alt-test.js serves a dead host and a published server holding the copies and checks the thumbnail, the profile page and the post rowsHEADmaster

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01VMan6TFgisGKUDhdStLUvs

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