[checkpoint_engine][rollout] Delta weight sync over NCCL for disaggregated rollout (+ sharded-snapshot variant)#6974

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ChangyiYang wants to merge 11 commits into

verl-project:mainfrom

ChangyiYang:delta-sharded-snapshot

Commits on Jul 3, 2026

Commits on Jul 9, 2026

[docs][engine] address review: split delta docs, declare get_per_tensor_param_shard on BaseEngine

gxlvera
and
claude
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[checkpoint_engine] stream delta flushes and apply them in place via SGLang's custom weight loader

gxlvera
and
claude
committed
[checkpoint_engine] keep delta positions on the GPU through flush assembly

gxlvera
and
claude
committed