Add GR00T + PLADIS single-pass sparse cross-attention guidance (Phase 1)#6
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KwanjoonPark wants to merge 1 commit into
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Add GR00T + PLADIS single-pass sparse cross-attention guidance (Phase 1)#6KwanjoonPark wants to merge 1 commit into
KwanjoonPark wants to merge 1 commit into
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Implements PLADIS (arXiv:2503.07677) as a new test-time guidance for GR00T-N1, mirroring the ACG guidance plumbing. - pladis.py: PLADISAttnProcessor extrapolates between dense (softmax) and sparse (entmax1.5/sparsemax) cross-attention: attn = dense + pladis_scale*(sparse - dense). Single forward pass per denoising step (no incoherent second pass), installed on cross-attention (even-idx) DiT blocks only. - guidance/__init__.py: register name=="pladis" dispatch. - gr00t_config.py: add guidance.pladis_scale (1.5), .method (ent15max), .pladis_layers. - PLADIS_INTEGRATION_TASKS.md: phased plan (GR00T+PLADIS, GR00T+ACG+PLADIS). - CLAUDE.md: repo guidance for Claude Code. Verified: pladis_scale=0 reduces exactly to standard softmax attention; scale=1.5 differs and is finite; bf16 path is NaN-free. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Cross Attention에 pladis 적용 |
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Implements PLADIS (arXiv:2503.07677) as a new test-time guidance for GR00T-N1, mirroring the ACG guidance plumbing.
Verified: pladis_scale=0 reduces exactly to standard softmax attention; scale=1.5 differs and is finite; bf16 path is NaN-free.