model must be Qubico/skin-tokens.task_type must be rig.input.model must be a valid glTF 2.0 binary (GLB), provided as a publicly accessible URL or a base64 data URI.output.model_file contains a URL for the rigged GLB. The output contains the original mesh, a fitted skeleton, and skinning weights. Skeleton joints use stable bone_0 through bone_N identifiers without semantic labels.config.webhook_config.endpoint and config.webhook_config.secret to receive a callback when the task reaches completed or failed. De-duplicate callbacks by task_id and fetch the task to confirm the final state.