Constant NEMOTRON_SHARED_EXPERT_E4M3 

pub const NEMOTRON_SHARED_EXPERT_E4M3: E4m3Saturation;

2026-09-30: --nemotron-shared-expert-e4m3: the Nemotron-H shared expert’s prefill tile GEMM casts its activations to E4M3 unscaled. The flag’s help discloses the saturation (1-30% local error measured on Nemotron-3-Nano), so any magnitude is covered.