FastH3 4-step Preview

Tools

• fasth3_4step_preview_demo_generate Generate a video with a synchronized soundtrack from a text prompt, in four transformer forwards. Returns: The path of an mp4 holding h264 video and AAC audio, a one-line report of what ran, and the rewritten, prompt when there was one.
• fasth3_4step_preview_demo_selftest Check the vendored VSA-H3 kernels against dense attention on this GPU. At `sparsity = 0` the block map is all-true, so VSA-H3 has to reproduce full attention exactly (up to the tile padding and the fp32 pooled selection, which cannot change an all-true mask). That is the one assertion that catches a wrong tile order, a wrong `variable_block_sizes`, or a mis-transposed buffer — all of which would otherwise show up only as a subtly wrong video. Runs on random tensors; no weights are touched. Returns: A markdown report: the dense-equivalence error, and how much of the dense output the 90%-sparse path keeps.
• fasth3_4step_preview_demo_status

No tool matches.

As the server's own listing gives them. We never call a tool.