fix: make Megatron one-shot train() assumptions idempotent across slime rollouts#1857

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leofan-lab wants to merge 2 commits intoTHUDM:mainfrom

leofan-lab:fix/megatron-no-sync-idempotent

Commits on Apr 24, 2026

fix: make no_sync_func install idempotent across train() calls

leofan-lab
and
claude
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Commits on May 6, 2026

fix: guard disable_forward_pre_hook on train() re-entry

leofan-lab
and
claude
committed