"""Constants the harness needs, lifted out of the package that defines them.

`speed.py` owns this number but imports pydantic contract records the harness never
touches, so it is carried here instead of vendoring that dependency.
"""

from typing import Final

#: ANSUR II 50th-percentile male hand breadth, the scale that converts pixels to
#: millimetres. Sensitivity to 79.5 and 90.4 is reported in the repository.
HAND_BREADTH_MM: Final[float] = 85.0