Orientation + process doc for an agent on a GPU branch: the 6 commits already
landed, the files to touch, the gating tasks (Risk A FastVideoArgs/checkpoint),
the verification bar (CPU suite stays 204; GPU generation matches a reference via
the SSIM harness), commit/push rules (no Claude co-author; don't rewrite history;
wandb token referenced not embedded), and the gotchas. Points to
GPU_BRINGUP.md for the detailed checklist + risk table.
