Revert "[train][step-wise] Add prefix-aware merging for step-wise training"#1537
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CharlieFRuan merged 1 commit intomainfrom Apr 20, 2026
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…ining (#…" This reverts commit 8180541.
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This pull request removes the prefix-aware merging feature for step-wise training, including the "merge_stepwise_output" configuration and its implementation. The "postprocess_generator_output" method signature has been updated to return only "GeneratorOutput", with corresponding updates to trainers, examples, tests, and documentation. I have no feedback to provide.
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Reverts #1532