Add dataset card and release manifests

README.md

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+---
+pretty_name: OpenCS2 Local Snapshot
+license: cc-by-4.0
+language:
+- en
+tags:
+- opencs2
+- counter-strike-2
+- video
+- reinforcement-learning
+- game-demos
+---
+
+# OpenCS2 Local Snapshot
+
+This repository is an unofficial, unmodified data snapshot assembled from two public OpenCS2-related Hugging Face datasets. It contains 18,087 data files (642.29 GiB logical size). Download caches and local download logs are intentionally excluded.
+
+## Sources and attribution
+
+- POV videos, tick tables, and the upstream index: [`blanchon/opencs2_dataset`](https://huggingface.co/datasets/blanchon/opencs2_dataset/tree/8d7deddcd30c081fb197b75f58b4a0fba1117b9d) at revision `8d7deddcd30c081fb197b75f58b4a0fba1117b9d`.
+- CS2 demo files: [`blanchon/cs2_dataset_demo`](https://huggingface.co/datasets/blanchon/cs2_dataset_demo/tree/912a363098feec3f220e41d68634d2f71676c28b) at revision `912a363098feec3f220e41d68634d2f71676c28b`.
+
+Both upstream dataset cards identify their license as CC BY 4.0. Credit remains with the upstream dataset authors and the original content creators. This mirror is not affiliated with or endorsed by Valve, HLTV, or the upstream authors.
+
+## Contents
+
+```text
+index/pov_rounds.parquet
+rounds/match_id=<id>/map_name=<map>/round=<NN>/player=<NN>/
+  video.mp4
+  ticks.parquet  # available for a subset of videos
+demos/shard-europe-<shard>/<match_id>/<match-name>-<map>.dem
+manifests/
+  all_files.jsonl
+  upload_stats.json
+  matches_05_08*.json[l]
+```
+
+File counts in this snapshot:
+
+- `12,120` POV MP4 files.
+- `5,910` per-POV tick Parquet files plus one upstream index Parquet.
+- `56` CS2 demo files.
+
+Join POV and tick data with `(match_id, map_name, round, player_slot)`. Demo files can be associated at `(match_id, map_name)` level. There are more POV videos than tick files in this snapshot; absence of a sibling `ticks.parquet` is expected for part of the collection.
+
+`index/pov_rounds.parquet` is the larger upstream index (165,270 rows), not an index limited to files mirrored here. Use `manifests/all_files.jsonl` as the authoritative path-and-size inventory for this repository.
+
+## Manifests and integrity
+
+The `matches_05_08*` files are a legacy subset manifest covering 5,910 POV/tick pairs, 28 demos, and the index. Local absolute paths were normalized to repository-relative paths for publication. `manifests/all_files.jsonl` covers every uploaded data file and records exact byte sizes.
+
+Binary content was not decoded or altered during mirroring. Videos and demos may display player names, chat, audio, or other in-game identifiers. Users are responsible for complying with the CC BY 4.0 attribution terms and any applicable game, tournament, privacy, and platform rules.

manifests/matches_05_08.audit.json

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+{
+  "match_window_one_based": [
+    5,
+    8
+  ],
+  "maps": [
+    "de_ancient",
+    "de_anubis",
+    "de_dust2",
+    "de_inferno",
+    "de_mirage",
+    "de_nuke",
+    "de_overpass"
+  ],
+  "map_match_pairs": 28,
+  "artifact_counts": {
+    "dem": 28,
+    "index": 1,
+    "pov": 5910,
+    "ticks": 5910
+  },
+  "pov_expected_bytes": 323829773691,
+  "manifest": "manifests/matches_05_08.jsonl",
+  "pov_revision": "8d7deddcd30c081fb197b75f58b4a0fba1117b9d",
+  "demo_revision": "912a363098feec3f220e41d68634d2f71676c28b",
+  "valid_artifact_counts": {
+    "dem": 28,
+    "index": 1,
+    "pov": 5910,
+    "ticks": 5910
+  },
+  "invalid_artifacts": 0,
+  "pov_tick_key_sets_equal": true,
+  "unique_pov_keys": 5910,
+  "unique_tick_keys": 5910,
+  "complete": true
+}

manifests/matches_05_08.summary.json

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+{
+  "match_window_one_based": [
+    5,
+    8
+  ],
+  "maps": [
+    "de_ancient",
+    "de_anubis",
+    "de_dust2",
+    "de_inferno",
+    "de_mirage",
+    "de_nuke",
+    "de_overpass"
+  ],
+  "map_match_pairs": 28,
+  "artifact_counts": {
+    "dem": 28,
+    "index": 1,
+    "pov": 5910,
+    "ticks": 5910
+  },
+  "pov_expected_bytes": 323829773691,
+  "manifest": "manifests/matches_05_08.jsonl",
+  "pov_revision": "8d7deddcd30c081fb197b75f58b4a0fba1117b9d",
+  "demo_revision": "912a363098feec3f220e41d68634d2f71676c28b"
+}

manifests/upload_stats.json

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+{
+  "generated_at": "2026-08-14T10:03:54+00:00",
+  "repo_id": "mikusama99/OpenCS2",
+  "total_files": 18087,
+  "total_bytes": 689655775783,
+  "suffix_counts": {
+    ".dem": 56,
+    ".mp4": 12120,
+    ".parquet": 5911
+  },
+  "excluded": [
+    "opencs2_matches/.cache/**",
+    "opencs2_demos/.cache/**",
+    "download_offset2.log"
+  ],
+  "sources": [
+    {
+      "repo_id": "blanchon/opencs2_dataset",
+      "revision": "8d7deddcd30c081fb197b75f58b4a0fba1117b9d"
+    },
+    {
+      "repo_id": "blanchon/cs2_dataset_demo",
+      "revision": "912a363098feec3f220e41d68634d2f71676c28b"
+    }
+  ]
+}