Function mtp_ep_propose_enabled 

pub fn mtp_ep_propose_enabled() -> bool

2026-09-25: Run the sharded drafter on every rank with the communicator. On unless METRALE_NO_MTP_EP_PROPOSE=1; read once per process. It is the GLM-5.3 MTP head’s DraftProposer::needs_comm, and a proposer that needs the communicator also has the worker run each propose (EP_CMD_MTP_PROPOSE).