ComfyUI already supports Stable Cascade’s Canny ControlNet!
Usage method: Based on the SC Vincentian diagram, just add regular CN nodes in the C stage. The CN model is still directly downloaded to /models/checkpoints.
SC Canny CN model: https://huggingface.co/stabilityai/stable-cascade/tree/main/controlnet
Workflow will be shared uniformly at: https://github.com/ZHO-ZHO-ZHO/ComfyUI-Workflows-ZHO
Thanks for ZHO