This wraps the inference.sh CLI to give Claude direct access to several image upscaling models, with Topaz as the main option after Real-ESRGAN and others were apparently cycled out. You can feed it low resolution images and get back higher quality versions, which is useful for cleaning up AI generated art before printing or restoring old photos. The skill focuses on a generate-then-upscale workflow, pairing nicely with FLUX or other image generation models. It's straightforward if you're already in the inference.sh ecosystem, though you'll need to install and authenticate with their belt CLI first. The documentation is solid and the skill page shows actual command examples rather than just talking about possibilities.
npx skills add https://github.com/inference-sh/skills --skill image-upscaling