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Three ledger runs for the cluster, exported on dataset/2026-09-29_v3 with the promoted recipe: nano at 1024 px, small at 640 px, small at 1024 px. A run can now carry its own training arguments (train_args in run.json, set with ledger new --kv), which train_run.py applies under any --set; train.sbatch forwards extra arguments after the run id (e.g. --batch 8). yolo26s-seg.pt joins the base weights under LFS. slurm/README lists the runs, the questions they answer and the commands. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>