README gains a Python section (maturin develop into a venv, a reading
example that was run against an h5py-written file, the supported types
and keys, what writing covers). The crate README says the same in more
detail. QUICKSTART showed clawhdf5.open()/read_f64(), which never
existed; it now shows File(...)[...].
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>