mesh-delivery's parts.Receiver.Take took a chunk 0 again on purpose (276412d7, design 51 Publishing, 1966/AC203-1, AC203-2); the holder's test still expected it refused and failed on every run, on trunk too. The test now expects a chunk out of sequence refused and a chunk 0 again taken. Builds: design 51 Publishing, the bullet "The file travels in parts through the seat"; issue 1975's group check Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h