# Changelog

## v1.0 - 2026-07-14

Initial public release documentation for EventActivityNet.

Verified release facts:

- Large scale: 3,263 videos, 106.941600381 hours.
- Medium scale: 1,537 videos, 50.000000128 hours.
- Small scale: 667 videos, 20.000000374 hours.
- 200 verified action classes.
- Large train/validation split: 2,316 / 947.
- HDF5 schema: `events`, `voxel_event_start`, `voxel_event_count`.
- `events` shape: `(T, 5, H, W)`, dtype `int16`.
- Total production size after validation: 4,355,745,895,245 bytes.
- Final integrity audit status: PASS.
- No truncated or structurally inconsistent production HDF5 files remain.

Notes:

- Five problematic HDF5 files were regenerated and safely installed before the final integrity audit.
- Medium and Small are deterministic nested v1.0 release scales derived from Large.
- The verified exact Large duration is 106.941600381 hours using `src_fmt_dur`.
- The verified class count is 200.

## v1.0 final small-file update

- Added public ActivityNet Captions annotations filtered to the release videos.
- Added ActivityNet v1.3 action annotations filtered to the release videos.
- Added EventActivityNet derived caption/action alignment metadata.
- Added original-rate timing metadata for all 3,263 release videos.
- Added `metadata/shard_checksums.sha256` with 219 repository-relative tar shard checksums.
- Updated payload summary metadata with 157 train shards, 62 validation shards, 219 total shards, 3,263 HDF5 members, and 4,355,753,021,440 remote tar bytes.