Function mhc_mix_max_tokens 

pub fn mhc_mix_max_tokens() -> usize

2026-09-25: Token bound of each site’s mix scratch, max(prefill_rows(), MHC_MIX_MAX_TOKENS), read once. The loader allocates the scratch from it and glm_hc_pre refuses more tokens than it, so the allocation and the check read one value.