# Data repositories: models and scenes outside the code **Code repositories track code** (owner, 2026-10-17). Trained weights live in [ModelANT](https://github.com/Kataglyphis/ModelANT), 3D scenes in [AssetANT](https://github.com/Kataglyphis/AssetANT). A consumer pins each file by SHA-256 in a lock and fetches it by checksum, so a clone carries no data, every file has one traceable license, and swapping a model or a scene moves one lock line. ## What moved, and why | Consumer | What left the tree | Why it mattered | | --- | --- | --- | | OxidANT, OmniAccelerANT | YOLO26/YOLOv10 (2026-10-14) | AGPL-3.0 weights in MIT and Apache repositories | | OrchestrANT | `yolov26m.onnx`, 78 MiB (2026-10-17) | the same AGPL weights, shipped in every package | | BeschleunigerBallett | 14 scenes, 518 of 633 MiB at HEAD (2026-10-17) | the code loads two of them, the packages install one | **History is not rewritten.** A rewrite changes every commit id that releases and other repositories pin (OxidANT's decision D4). The old blobs stay in the history, and a CI checkout that wants less can clone with `filter: blob:none`. ## A data repository - **One directory per item** with its metadata: `models//model.json`, `assets//asset.json`. It records the upstream source, the license and how the license was established. AssetANT says `unknown` where nothing was found rather than guessing. - **Scripts that rebuild the release bytes.** ModelANT exports from a pinned upstream commit and checkpoint. AssetANT packs reproducibly: sorted entries, mtime 0, owner 0, `xz -9 -T1`. Debian 13 and Ubuntu 26.04 packed three of its assets to the same hashes. - **One release per item version**, tag `-v`: the files, the metadata and `SHA256SUMS`. A consumer's lock then moves one line when one item changes. - **Immutable releases are on** in both repositories (2026-10-17), so a published file can never be replaced. A changed item is `-v`. - **The credit travels with the files**: a model's `LICENSE` and `NOTICE` are release files that packages ship beside it, and every AssetANT archive carries `ATTRIBUTION.txt`. ## The lock One line per file, `#` for comments, whitespace-separated: ```text # sha256 file url 225f612fc879d604b79a569648f274672090070a07dcbdef469796df956f8392 deim_dfine_n_coco.onnx https://github.com/Kataglyphis/ModelANT/releases/download/deim_dfine_n_coco-v1/deim_dfine_n_coco.onnx ``` Every fetcher keeps the same contract: - It downloads through a cache keyed by the hash: `KATAGLYPHIS_MODEL_CACHE` or `KATAGLYPHIS_ASSET_CACHE`, else `%LOCALAPPDATA%` or `~/.cache`. - It checks the hash of the cached copy and of every download. A model fetcher re-hashes the target too, and the scene fetcher reads its stamp (below). - It writes atomically (`.part`, then rename) and retries a failed download three times. - The scene fetcher never overwrites what it did not write: a scene directory without its stamp stops the configure. | Consumer | Lock | Fetcher | | --- | --- | --- | | OxidANT | `resources/models/models.lock` | `scripts/linux/fetch-models.sh`; OmniAccelerANT's `scripts/windows/Get-Models.ps1` | | OrchestrANT | `resources/models/models.lock` | `scripts/fetch_models.py` (stdlib, Linux and Windows) | | BeschleunigerBallett | `Resources/assets.lock` | `cmake/FetchAssets.cmake`, at every configure or as `cmake -P` | **A fetched scene directory holds a stamp with two fields**: the archive's hash and the number of files it extracted. A matching hash alone is not enough. On 2026-10-17 a rebase deleted the tracked scene files and kept the ignored stamp, and a hash-only check reported "up to date" over an empty directory. Checking out a commit that still tracked the scenes does the same. **A package fetches before it bundles.** OrchestrANT's `ci_packaging.sh` and both Windows build scripts run the fetcher before the hub copies `packaging/app.json`'s `data`. BeschleunigerBallett's configure fetches before the install rules run. ## What stays in a code repository - Test fixtures a suite reads, small and next to it: OxidANT's `two_cats.jpg` (83 KiB) and BeschleunigerBallett's `GltfTest`, `ShadowTest` and `VikingRoom`. Tests must run offline. - Icons, branding and a README's images, compressed: OxidANT's hero image went from a 7.5 MiB GIF to a 2.1 MiB WebP on 2026-10-17. - Shaders, which are code, and a website's own content (ANThology's images and fonts). Three fetchers keep one contract in three languages; one hub-owned implementation is BACKLOG CON98.