Archive README.md

README.md

@@ -1,3 +1,30 @@
 # motion_example_0506: indexed tar archive
 
-Packaging/upload is in progress. Do not treat this repository as complete until `REMOTE_VERIFIED.json` is present.
+Uncompressed tar shards preserving source-relative paths, including all modalities.
+Original regular files: 1,498,378. Archive shards: 71.
+
+Wait for `REMOTE_VERIFIED.json` before treating this upload as complete.
+No dataset license is inferred or granted by this packaging operation.
+
+## Read a member without extracting the dataset
+
+Download the index and required tar shards, plus `pack_motion_example.py`:
+
+```python
+from pack_motion_example import PackedMotionReader
+reader = PackedMotionReader('/path/to/dataset_tar')
+payload = reader.read_bytes('metadata.jsonl')  # use an existing indexed path
+reader.close()
+```
+
+`reader.open(path)` buffers one member and supports file-object readers such as `numpy.load` / `torch.load`. Existing filename-only video decoders need an adapter.
+
+## Restore files
+
+Keep the tar files, `archive_index.sqlite`, `archive_index.tsv`, `SHA256SUMS`, `packing_summary.json`, and both Python scripts in one folder:
+
+```bash
+python unpack_motion_example.py --archive-dir /path/to/dataset_tar --output-dir /path/to/new_restored_directory --workers 8
+```
+
+Restoration verifies SHA256 and refuses mismatching existing files. External symlink targets are not copied; external links require explicit opt-in. Hardlinks were materialized as independent files. Ownership is not restored; special permission bits are removed and owner access is retained.