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* first commit * feat(policies): add VLA-JEPA * feat(policies): add VLA-JEPA * support vla_jepa * (feat)policies: add VLA-JEPA * linting * adding deps to pyproject.toml * updating uv lock * adding guards to avoid needing transformers and diffusers for type checking and basic tests * fixing action and state dim * fix warnings with qwen processor kwargs * fixing wm_loss not propagating * adjusting obs steps, tublets size to match original implementation * some more fixes to be closer to the original implem * adding more tests to ensure good coverage * align VLA-JEPA architecture with original checkpoint - Remove stale `action_num_heads` / `action_attention_head_dim` config fields; DiT head dimensions are now always derived from the preset (DiT-B/L/test). - Add `num_target_vision_tokens` and `action_max_seq_len` config fields required by the action head's future-token embedding and positional embedding tables. - Fix default `qwen_model_name` to 2B (matches all released checkpoints). - Rename `ActionEncoder` attrs w1/w2/w3 → layer1/layer2/layer3 to match checkpoint key names; replace `nn.Sequential` decoder/state-encoder with `_MLP2` (layer1/layer2 naming). - Fix `VLAJEPAActionHead` to size ActionEncoder and StateEncoder at `inner_dim` (DiT input width) rather than `action_hidden_size` (DiT output width). - Rename `DiT.blocks` → `transformer_blocks` and `attn` → `attn1` to match checkpoint; add alternating cross/self attention (even blocks cross-attend to Qwen context, odd blocks self-attend). - Add `DiT-test` preset for unit tests. - Rewrite `ActionConditionedVideoPredictor` with explicit ViT-style blocks (`_PredictorBlock` with fused qkv) to match checkpoint structure; rename `encoder`/`norm`/`proj` → `predictor_blocks`/`predictor_norm`/`predictor_proj`. * propagate action_is_pad masking through VLA-JEPA policy pipeline Pass the `action_is_pad` tensor from the batch through to the action head so padded timesteps are excluded from the flow-matching loss. * update VLA-JEPA tests for arch changes and action_is_pad - Switch conftest to use `action_model_type="DiT-test"` now that `action_num_heads` / `action_attention_head_dim` have been removed. - Add action_head tests covering fully-padded loss (zero) and equivalence of action_is_pad=None vs all-zeros mask. - Remove obsolete `test_native_to_lerobot_wm_only` test. * add VLA-JEPA documentation Covers architecture overview, pretrained checkpoints, config reference, training/eval commands for LIBERO-10, and guidance on fine-tuning for single-camera datasets. * add one-shot script to convert ginwind/VLA-JEPA checkpoints to safetensors (will remove once migrated) * make default params more aligned with paper and pretrained models - adding possibility of freezing qwen backbone and world model - added tests for weight loading * trying out to re-init the action head to avoid pretraining dimension mismatch * allow different state dim and action dim * removing missleading future_action_window_size to just use chunk_size * lots of changes to make existing weights work, need to massively refactor the pre and post processing * refactoring into using pre and post processor * pre-commit cleanup * fixing doc defaults args Signed-off-by: Maxime Ellerbach <maxime@ellerbach.net> * adressing dtype zeros issue * adding guard for diffusers * fixing training and exal examples * trying to close success rate gap * fix qwen norm layer output libero eval is now as expected * adding instructions for different embodiement + fixing some tests * smol fix to avoid having default CPU device when training * fixing misconception about multiview / singleview handling * removing conversion script * adding licences * adding .mdx docs and shortening polivy_vla_jepa_README.md * removing useless pre-processor * cleanup * removing swish in favor of silu * adding configuration gripper index and threshold * fixing simlink --------- Signed-off-by: Maxime Ellerbach <maxime@ellerbach.net> Co-authored-by: ginwind <ginwind@mail.ustc.edu.cn>
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