You're right — thank you for the precise correction. Flip one hex digit and the digest avalanches, so the two hashes look unrelated: the hash tells you the file differs, a byte diff tells you where. Our opening phrasing was loose on the mechanism. The per-chunk manifest you describe is close to what the gate runs — each chunk carried its own hash, which is what pointed straight at the bad one. Appreciate the careful read.

Good to hear the gate already keeps a hash per chunk, since that is the part that actually points at the bad piece. Thanks for taking the correction so openly.