feat(train): Add SequenceLength support for SFT, DPO, RLVR, RLAIF trainers#5965

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guanweim wants to merge 8 commits into

guanweim:context_length

Commits on Jul 9, 2026

feat(train): Add SequenceLength support for SFT, DPO, RLVR, RLAIF trainers
guanweim
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fix: use codegen for SequenceLength shape instead of manual shapes.py edit
guanweim
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fix: correct test imports and mock setup for sequence_length tests
guanweim
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address PR review: sequence_length as recipe pre-filter and simplify config
guanweim
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test: add integration test for SFT trainer with sequence_length
guanweim
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Regenerate code via codegen and remove hardcoded path in data_extractor.py
guanweim
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comment out gpu testing flag
guanweim
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fix: reject bare integer inputs in _parse_context_length
guanweim
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