| # Release audit — 2026-09-29 |
|
|
| The previous ALMA scaffold described legacy MLP segmentation and had no |
| packaged checkpoints/configs. The release now follows the final segmentation decoder runs. |
| Source experiments and original weights were not modified. |
|
|
| | Artifact | Source best epoch | Stored best validation mIoU | |
| | --- | ---: | ---: | |
| | QL1 encoder/full MAE (exp6) | 235 | not applicable | |
| | QL2 encoder/full MAE (exp10 stage 2) | 80 | not applicable | |
| | QL1 segmentation | 93 | 0.9016097784 | |
| | QL2 proxy segmentation | 65 | 0.9329832792 | |
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|
| The manifest identifies exact sources, source/release SHA-256 hashes, sizes, |
| and YAML pairings. Release weights omit optimizer state and private runtime |
| paths. All six exports were compared tensor by tensor with source checkpoints: |
| every key and tensor matched (encoder exports select only `h_encoder.*`). |
|
|
| ## Corrections |
|
|
| - Replaced stale MLP release wiring with final segmentation decoder architecture/configs; |
| retained strict loading and added physical decoder metadata checks. |
| - Included QL1/QL2 pretraining, full MAE weights, regime-specific downstream |
| trainers, evaluation configs, and documented staged-training provenance. |
| - Preserved five-class/ignore-label definitions and distinct pretraining vs |
| downstream normalization. Documented the QL2 supervised proxy scope. |
| - Changed tile prediction to FP32; preserved complete source LAS records, |
| CRS and attributes; used uint32 output coverage and rejected nonfinite values. |
| - Added correct repeated-index accumulation as an explicit fusion option; |
| examples retain paper legacy behavior to avoid silently changing products. |
| - Corrected optional CUDA KNN layout, retained PyTorch KNN default, and |
| included missing Chamfer extension sources and package/dependency metadata. |
| - Fixed resumed pretraining best-score preservation and bounded invalid-crop |
| search; empty crops now fail/skip rather than train on synthetic zeros. |
| - Added citation, attribution, model cards, publishing instructions and tests. |
|
|
| ## Validation and limits |
|
|
| - Six artifact hashes and CPU loads passed, including strict full-MAE/segmentation decoder |
| loading and rejection of mismatched regime/physical radius. |
| - Initial local suite: 12 tests, 11 passed, one CUDA forward test skipped. |
| - User-reported GPU run on 2026-09-30: all 12 tests passed in 11.460 seconds, |
| with no skips. Both QL1/QL2 encoder and segmentation decoder full-size forward checks passed, |
| including hierarchy dimensions and finite five-class segmentation logits. |
| - Pretraining checks cover normalization, invalid crops, loading |
| release initialization weights, and recovering prior best metrics on resume. |
| - Source QL2 segmentation decoder and release segmentation decoder produced bitwise-identical outputs on a small |
| CPU comparison after loading identical head parameters. |
| - All Python sources parsed and both pretraining runners imported. |
| - A wheel built with `pip wheel --no-deps --no-build-isolation`. |
|
|
| Checked environment: Python 3.13, PyTorch 2.8.0+cu126, NumPy 2.3.2, |
| timm 1.0.19, laspy 2.6.1. CUDA was unavailable in the initial audit session; |
| the subsequent GPU result above is from terminal output supplied by the user. |
| The GPU node's hardware/full environment were not recorded in that output. |
| Operators were not rebuilt during this audit. CUDA backward/MAE loss, DDP |
| training, real-tile inference, fresh-environment installation, and reproduction |
| of paper metrics remain unverified. The GPU forward gate has passed; it does |
| not replace an actual training/evaluation run. |
|
|
| The initial weight bundle was uploaded at Hugging Face commit |
| `5307569f57e16b59eca53484c42304d8ddd8c38e`. A subsequent terminology cleanup |
| uses a public experiment identifier for the QL2 segmentation artifact. This |
| changes its metadata and release hash, but preserves every tensor and source |
| checkpoint hash. The user uploaded the refreshed bundle at commit |
| `aa51bb453ec2aac74e74e1d84e2d0903625575e7`; all six download URLs now point |
| to that revision. Fresh public-download verification remains pending. |
| Training data and original split manifests are not distributed. |
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