pulkit6732

"""
integrity.py — minimal experiment integrity receipt (Python stdlib only).

Writes ONE tamper-evident line per run that binds the reported val_bpb to the
exact code, data, and model that produced it. This is *detection*, not
prevention: enough to make a gamed run stand out in the overnight log and to
make any kept result reproducible.

Each receipt records:
  - val_bpb               the reported metric