BodyModel::set_backbone_fp8 quantises every backbone weight to E4M3 with
a per-tensor absmax scale and runs the tensor-core FP8 GEMM (bias
broadcast after). A backend without FP8 turns it off per layer on the
first refusal, so Metal keeps bf16. The oracle test reports its
accuracy and timing next to bf16; the default stays bf16 until the
numbers say otherwise.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
makepad-ai-body joins the AI model workspace: the constants of the
architecture (DINOv3 ViT-H+/16 at 512, the 6-layer promptable decoder,
the 519-wide pose head, the 127-joint / 18439-vertex MHR rig) and the
single-file safetensors reader for the Comfy-Org repack, which fails
closed on a Meta checkpoint-style header and checks the shapes the port
is written for at load. The backbone, decoder and rig modules follow
in their own lanes against the spec under local/agent_state/sam3dbody.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
