QAT MTP Heads Upload + PARALLEL=2 Fix + 12B 2-slot Bench
QAT-matched assistant heads for Gemma 4 (12B, 26B-A4B, 31B) released on HuggingFace for speculative decoding. PARALLEL=2 crash fixed in llama.cpp. QAT-matched heads improve acceptance rate by 7–35 percentage points vs non-QAT heads.