Function mtp_pool_full_width 

pub fn mtp_pool_full_width() -> bool

The ATLAS_MTP_POOL_FULL_WIDTH kill switch (PRESENCE, house convention — =0 is NOT off), plus the EP-v2 implication (v2 pins slots in place for the worker mirror, so a high slot may legitimately speculate forever). SSOT for BOTH pool diets it disables: the bs>32 slot-count cap (mtp_state_slots) and the tiered per-slot verify capacity (verify_slot_drafts) — one switch restores the full-width, uniform-K sizing everywhere (pool, preflight, scheduler clamp).