Measured on the live server, on the first presenter request that ever ran:

    sadtalker failed (rc=1): init_fs_encoding: failed to get the Python codec
    of the filesystem encoding / No module named 'encodings'

The shims on PATH run the bundled python 3.10 venv, and the process that
spawns them exports PYTHONHOME=/opt/coderai/python -- the standalone 3.13. The
child dies before executing a byte, the job falls back to the scene's visuals,
and the warning blames the engine. Same root cause as the ACE-Step worker's
"requirements missing", so it uses the same helper; the deliberate PYTHONPATH
these repos need is set after cleaning, pointing at the checkout rather than
inheriting the server's.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014T3rZnLhydX9QqUcfBbqLu