mam_int / mam_int_knob call `python3 -I` because the file is also sourced without lib.sh and so without $PY. The header now says so, and that without a python3 on PATH they print nothing (rc 127). The code is unchanged. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HCGpJXhSZasJLU38ksDghe