I am unsure what you want with "inpaint at full resolution, padding" as the option in Automatic1111 was removed a long time ago. (according to this https://github.com/AUTOMATIC1111/stable-diffusion-webui/discussions/4637) .
But if you want to understand detailer and SAM from Impact. I found this one quite helpful. https://github.com/ltdrdata/ComfyUI-extension-tutorials/blob/Main/ComfyUI-Impact-Pack/tutorial/sam.md
It might not be what you want, but at least that got me started with the detailers in Impact Pack.