Use Snappy parquet for LeRobot browser visualizer

README.md

@@ -351,3 +351,5 @@ This dataset was created using [LeRobot](https://github.com/huggingface/lerobot)
 ## Native-dimension multispace actions
 
 This revision adds joint, absolute quaternion, absolute rotation-6D, and base-frame delta action fields. Dataset tensors use native dimensions; model-side transforms are responsible for padding and masks. See `meta/action_spaces.json` and `meta/verification_report.json`. Global numeric stats were recomputed with LeRobot 0.6 `recompute_stats` on 48server; unchanged video stats were preserved from the source dataset.
+
+Dataset data and episode-metadata parquet files use Snappy compression for browser visualizer compatibility.

data/chunk-000/file-000.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:7776445beaca8e687812d21bf2a76bebe911a34dfa2e6174dca8cd1231771c03
-size 34978828
+oid sha256:0285bc607a858a2a3ebd6d7172081c9b9fbf429fc1205ff7e9cde83f2f27cb54
+size 40788665

meta/conversion_manifest.json

@@ -7,7 +7,7 @@
     "data/chunk-000/file-000.parquet": "ca665e73b9e9958b9b37a559c729d4056f099565e4d11c8fe689ea5b2134ea7b"
   },
   "output_data_sha256": {
-    "data/chunk-000/file-000.parquet": "7776445beaca8e687812d21bf2a76bebe911a34dfa2e6174dca8cd1231771c03"
+    "data/chunk-000/file-000.parquet": "0285bc607a858a2a3ebd6d7172081c9b9fbf429fc1205ff7e9cde83f2f27cb54"
   },
   "converter": "/home/seonho/INSIGHTBench/my_scripts/convert_multispace_dataset.py",
   "conversion_function": "replay_multispace_canary.derive_action_spaces",
@@ -42,5 +42,19 @@
       "action.skill_id"
     ],
     "image_stats": "copied from source stats because all video files are unchanged"
+  },
+  "episode_metadata_sha256": {
+    "meta/episodes/chunk-000/file-000.parquet": "97c4b8fd0869aaa1ff368a07d5355a61ea00acc694de63e45c2ce838c28d443b"
+  },
+  "parquet_compression": {
+    "data": "snappy",
+    "episode_metadata": "snappy"
+  },
+  "visualizer_compatibility_update": {
+    "completed_at_utc": "2026-07-14T01:07:22.908498+00:00",
+    "reason": "LeRobot visualize_dataset uses hyparquet without extra ZSTD compressors",
+    "from": "zstd",
+    "to": "snappy",
+    "value_verification": "all Arrow buffers bitwise identical before and after recompression"
   }
 }

meta/episodes/chunk-000/file-000.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:ce835120661e26abddac6feb20baea25bc00b73849ee6051721de2f9110be9f1
-size 8615722
+oid sha256:97c4b8fd0869aaa1ff368a07d5355a61ea00acc694de63e45c2ce838c28d443b
+size 10346213

meta/verification_report.json

@@ -80,5 +80,16 @@
       },
       "note": "Use video_backend=pyav in lerobot060_groot; the default torchcodec backend has a local FFmpeg ABI mismatch."
     }
+  },
+  "visualizer_compatibility": {
+    "status": "pass",
+    "completed_at_utc": "2026-07-14T01:07:22.908498+00:00",
+    "data_parquet_compression": "SNAPPY",
+    "episode_metadata_parquet_compression": "SNAPPY",
+    "data_rows": 218367,
+    "episode_metadata_rows": 4930,
+    "bitwise_method": "SHA-256 comparison of every Arrow column buffer, including nested values, offsets, and null bitmaps",
+    "all_column_buffers_bitwise_equal_before_after": true,
+    "stats_recompute_required": false
   }
 }