docs: add README with archive format, download and extract instructions

README.md

@@ -0,0 +1,91 @@
+---
+license: cc-by-4.0
+pretty_name: R3-Bench Research Data
+size_categories:
+- n>1T
+tags:
+- benchmark
+- vision-language
+- video-understanding
+- evaluation
+---
+
+# R3-Bench Research Data
+
+> **⚠️ This is not a HuggingFace `datasets` library dataset.**
+> This repo is a raw archive of project directories from R3-Bench research,
+> packaged as gzip'd tar files. Use the download + extraction instructions
+> below — do **not** use `datasets.load_dataset()` on this repo.
+
+## What's inside
+
+Large binary outputs from the R3-Bench evaluation framework research — roughly **323 GB** across multiple tarballs. Each file corresponds one-to-one to a directory in the original working tree:
+
+| File | Source directory | Size | Shards |
+|---|---|---|---|
+| `alive.tar.gz` | `alive/` | 10.7 kB | 1 |
+| `backup_bin.tar.gz.part_{aa..ae}` | `backup_bin/` | ~193 GB | 5 |
+| `compare_methods_OmniVerifier_data.tar.gz` | `compare_methods/OmniVerifier/` | 2.09 GB | 1 |
+| `compare_methods_Step1X-Edit.tar.gz` | `compare_methods/Step1X-Edit/` | 6.23 GB | 1 |
+| `compare_methods_Step1X-Editv2.tar.gz` | `compare_methods/Step1X-Editv2/` | 129 MB | 1 |
+| `elo_human_eval.tar.gz` | `elo_human_eval/` | 146 MB | 1 |
+| `eval.tar.gz` | `eval/` | 3.02 GB | 1 |
+| `exps.tar.gz.part_{aa..ac}` | `exps/` | ~103 GB | 3 |
+| `images.tar.gz` | `images/` | 725 MB | 1 |
+| `iterative_ablation_output.tar.gz` | `iterative_ablation_output/` | 1.94 GB | 1 |
+| `logs.tar.gz` | `logs/` | 121 kB | 1 |
+| `output.tar.gz` | `output/` | 6.58 GB | 1 |
+| `paper_case.tar.gz` | `paper_case/` | 5.62 GB | 1 |
+
+Files larger than the HuggingFace single-file LFS limit were split into ~50 GB shards with `split -b 45G`.
+
+## Download and extract
+
+```bash
+# 1. Install the HF client
+pip install -U huggingface_hub
+
+# 2. Download everything to a local directory
+huggingface-cli download xiaomoguhzz/R3-Bench-data \
+    --repo-type dataset \
+    --local-dir R3-Bench-data/
+cd R3-Bench-data/
+
+# 3. Merge split shards back into monolithic tarballs
+cat backup_bin.tar.gz.part_* > backup_bin.tar.gz
+cat exps.tar.gz.part_*        > exps.tar.gz
+rm backup_bin.tar.gz.part_* exps.tar.gz.part_*
+
+# 4. Extract every archive
+for f in *.tar.gz; do
+    echo "extracting $f ..."
+    tar xzf "$f"
+done
+```
+
+After extraction you should see the original R3-Bench working tree layout:
+
+```
+alive/   backup_bin/   compare_methods/   elo_human_eval/   eval/
+exps/    images/       iterative_ablation_output/   logs/
+output/  paper_case/
+```
+
+## Why the Dataset Viewer shows an error
+
+The HuggingFace Dataset Viewer auto-detects tar archives and tries to parse them as [WebDataset format](https://huggingface.co/docs/hub/datasets-webdataset). This repo is a raw tarball dump (not WebDataset), so the viewer reports:
+
+```
+SplitsNotFoundError: The TAR archives of the dataset should be in WebDataset
+format, but the files in the archive don't share the same prefix or the same types.
+```
+
+**This is expected** and does not affect downloads — the error only concerns the preview panel, not the files themselves.
+
+## Related code
+
+The research code that produced and consumes this data lives in separate GitHub repositories. Both are currently private; please reach out to the repo owner for access if you need it.
+
+## License
+
+Released under **CC-BY-4.0**. You are free to share and adapt, provided you give appropriate credit.