FastWAM upstream (Wan2.2-TI2V-5B + ActionDiT), SBInt openarm 873-ep dataset, abs arm: absolute 16-dim right-first actions [rarm7, rgrip, larm7, lgrip], z-score norm. Fresh 50k A/B run (2×8 GPU, global batch 128, AdamW 1e-4 cosine), this is the step-10000 weights checkpoint.

Files: step_010000.pt (trainer weights format), config.yaml (run config), dataset_stats.json (normalizer stats, absolute space).

Upstream repo: https://github.com/zhujohn9604/FastWAM — see handoff/SBINT_AB_DELTA.md (design) and handoff/ENV_SETUP.md (reproduction).