A daemon that fails during startup reported the reason via eprintln! in
main's error arm. Under launchd stderr is discarded, so the failure was
invisible: daemon.log was created and left empty — exactly the case the
log file was added for.
Found by the manual acceptance run: the launchd agent loaded correctly
(RunAtLoad fired, runs=9) but every spawn exited 1 because a previously
started daemon held the pidfile, and nothing recorded why.
Fatal errors on the daemon path now go through tracing::error!, reaching
both the log file and stderr. Other subcommands keep eprintln!, since
their stderr is the user's terminal.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EGntTHCW3sEPy1VBRopNNp
logaritmiskandClaude Opus 5
ecff75d514