teknium1 a8409a161f fix: guard all print() calls against OSError with _SafeWriter ...

When hermes-agent runs as a systemd service, Docker container, or
headless daemon, the stdout pipe can become unavailable (idle timeout,
buffer exhaustion, socket reset). Any print() call then raises
OSError: [Errno 5] Input/output error, crashing run_conversation()
and causing cron jobs to fail.

Rather than wrapping individual print() calls (68 in run_conversation
alone), this adds a transparent _SafeWriter wrapper installed once at
the start of run_conversation(). It delegates all writes to the real
stdout and silently catches OSError. Zero overhead on the happy path,
comprehensive coverage of all print calls including future ones.

Fixes #845

Co-authored-by: J0hnLawMississippi <J0hnLawMississippi@users.noreply.github.com>

2026-03-11 09:19:10 -07:00

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