Update asset model card

README.md

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+---
+license: apache-2.0
+tags:
+- dex-hand
+- teleoperation
+- retargeting
+- mujoco
+- assets
+---
+
+# somehand-assets
+
+External asset repository for `somehand`.
+
+## Contents
+
+This model repo stores runtime assets and sample data that are intentionally kept out of the code repository:
+
+- `archives/mjcf_assets.tar.gz`: packaged MJCF hand assets and meshes under `assets/mjcf/`
+- `models/hand_landmarker.task`: MediaPipe hand landmarker model under `assets/models/`
+- `archives/reference_assets.tar.gz`: reference BVH assets, currently including `assets/ref_with_toe.bvh`
+- `archives/sample_recordings.tar.gz`: sample replay recordings and short rendered examples under `recordings/`
+
+## Suggested download commands
+
+### ModelScope
+
+```bash
+export SOMEHAND_MODELSCOPE_REPO_ID=BingqianWu/somehand-assets
+python scripts/setup/download_assets.py --only mjcf mediapipe examples
+```
+
+### Hugging Face
+
+```bash
+export SOMEHAND_HF_REPO_ID=12e21/somehand-assets
+python scripts/setup/download_assets.py --source huggingface --only mjcf mediapipe examples
+```
+
+## Notes
+
+- This repo is a **model repo** so asset updates are versioned as commits.
+- The main `somehand` code repository should not store these large binaries directly.
+- Sample recordings are provided for replay, visualization, and regression-style checks.