Add example_workflows/img_demo/ (4 annotated shots: dynamic sampler, sequential refine, and a standard-vs-Unblend before/after on Ningguang x Shenhe) with a README Demo section. Replace the old example graph with the user's unblend_workflow_example.json (minimal; bring your own checkpoint/style/upscalers) and update the reference. Add a 'Why I built this' note and concrete SAM install guidance (ComfyUI Manager — SAM is not in core). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>