What
Debug log messages from the session engine now use the prefix [engine] instead of the old [shoji-engine] prefix. Similarly, [shoji] prefixes on other wire-layer messages have been updated. This affects diagnostic output in claude --debug and log files.
Evidence
Prefix rename (removed: "[shoji-engine]", added: "[engine]")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.