What probably matters to youSection of the release
What
If you set the CLAUDE_CODE_DIR_SYNC_ENGINE environment variable to something this build does not recognise, the status line now tells you the value changes nothing instead of silently ignoring it. Setting it to none switches file sync off on that machine; leaving it unset leaves sync on.
Details
The message appears only when unrecognised words are present, and a once-per-session helper keeps it from repeating.
Unknown words are sanitised to printable ASCII and only the first three are shown.
Evidence
which changes nothing; "none" switches file sync off on this machine, unset leaves it on.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
