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"""Cutlass-primitives kernel helpers local to the FROST GDN implementation.

``thd.py`` (the THD per-(batch, head) TMA descriptor builders),
``head_reduce.py`` (the GVA/GQA head-group gradient reduction), and
``split_k.py`` (the split-K work-item partitioning: forgetting-horizon
cuts + the tile decode shared by the main kernels; scalar and per-channel
gate scans through one pipeline).  The tile primitive
library lives in the shared ``cudnn.frost.tile_dsl``."""
