Adding to what's above, a couple of things that save a lot of time:
Any image generated in ComfyUI has the full workflow embedded in the PNG. Drag the image back onto the canvas and the whole graph loads. ComfyUI Manager will then install any custom nodes it's missing.
ComfyUI also ships with built-in templates now (Workflow menu, then Browse Templates, depending on your version), so you don't always have to hunt them down.
And since you mentioned Claude: export the workflow as JSON rather than a screenshot. It reads the node graph from JSON far more reliably than from an image.