One PR diff containing a byte that is not valid UTF-8 made git() and
merge() raise, which aborted the hourly run and dropped the overlap
comment on every PR. Both subprocess calls now pass errors="replace",
matching check_conventions.py. A test commits a Latin-1 byte and checks
the export is still found.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V9UU71SP1UKGR51Sowbgmq