Document aligned scene caches and their active publication

optional/scene/32/README.md

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+# Aligned scene latents at 32³
+
+Publication is in progress.
+These caches cover 99,642 training views across three datasets.
+Each reference voxel retains one token and per-object membership labels.
+The `latent_valid` flag marks rows with a native encoder output.
+Rows without native output retain their coordinates and zero latent values.
+
+| Dataset | Training views | NPZ data, GB |
+| --- | ---: | ---: |
+| 3dfront | 39,930 | 4.496 |
+| sage | 17,456 | 1.136 |
+| foundationpose | 42,256 | 4.948 |
+
+The archives preserve the original files and codec provenance.
+Each component becomes available after its `index.json` records `complete=true`.
+[Publication status](publication-progress.json) records completion for the full collection.
+
+## Restore
+
+Restore the matching observations before reading scene targets.
+The `slat-seg` task downloads those observations without other latent targets.
+
+```bash
+python -m preprocess.huggingface download --repo cubec/PartProbe3D-preprocessed --task slat-seg
+```
+
+Restore the selected scene caches:
+
+```bash
+python -m preprocess.huggingface download --repo cubec/PartProbe3D-preprocessed --dataset 3dfront --bundle-root optional/scene/32 --cleanup
+python -m preprocess.huggingface download --repo cubec/PartProbe3D-preprocessed --dataset sage --bundle-root optional/scene/32 --cleanup
+python -m preprocess.huggingface download --repo cubec/PartProbe3D-preprocessed --dataset foundationpose --bundle-root optional/scene/32 --cleanup
+```
+
+The restored root is `datasets/<dataset>/slat/32/scene_targets/`.
+`dataloader.slat_scene.SceneTargetDataset` reads the caches with their matching saved observations.
+The reader does not require source meshes.

optional/scene/32/publication-progress.json

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+{
+  "schema": "partprobe3d.scene-publication.v1",
+  "state": "uploading",
+  "updated_kst": "2026-10-21T19:41:15.609368+09:00",
+  "datasets": {
+    "3dfront": {
+      "views": 39930,
+      "component": "optional/scene/32/3dfront",
+      "npz_bytes": 4495937170
+    },
+    "sage": {
+      "views": 17456,
+      "component": "optional/scene/32/sage",
+      "npz_bytes": 1135729341
+    },
+    "foundationpose": {
+      "views": 42256,
+      "component": "optional/scene/32/foundationpose",
+      "npz_bytes": 4947964162
+    }
+  }
+}