[2/8] feat: support partial checkpoint loading - #3
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yueming-yuan
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Feb 18, 2026
yueming-yuan
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- Allow loading checkpoints with missing keys (warn+skip instead of KeyError)
- Add weights_only=False to torch.load for backward compat
- Filter metadata for allow_shape_mismatch_sharded_tensors
- Enable allow_partial_load=True in MCoreLoadPlanner
- Handle None step in optimizer state dict
Allow loading checkpoints with missing keys by skipping them instead of raising KeyError. This is essential for RL training where model architecture may differ from the checkpoint. - Add weights_only=False to torch.load for backward compatibility - Skip missing keys in _validate_global_shapes with a warning - Filter metadata for allow_shape_mismatch_sharded_tensors - Enable allow_partial_load=True in MCoreLoadPlanner - Handle None step in optimizer state and skip step key in sharded dict Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Feb 26, 2026
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
guapisolo
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Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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