[padatta]

Summary

• document installation of the PyTorch XPU backend for Diffusers
• make the existing Diffusers quickstart select Intel XPU when available, with CUDA fallback
• keep the existing model and generation parameters unchanged
• keep the support scope limited to Cosmos3-Edge generation through Diffusers

Validation

• loaded the official nvidia/Cosmos3-Edge checkpoint
• ran a Cosmos3-Edge generation on an Intel Arc GPU through PyTorch XPU
• verified that generation completed and produced finite output
• checked the documentation snippets and repository diff

[yaoxu-crypto]

Thanks for this, @padatta. The Cosmos cookbooks and evaluation suites have moved to NVIDIA/cosmos-framework under .agents/skills/ and were removed from this repo in #384, so this PR can no longer merge here.

Intel XPU support for Cosmos3-Edge isn't in Cosmos Framework yet. Could you re-submit it against .agents/skills/cookbooks/cosmos3/README.md and generator/audiovisual/README.md? Including the PyTorch and diffusers versions you validated with on the Arc GPU would help the reviewers.

The relative paths are unchanged, just under .agents/skills/ (for example cookbooks/cosmos3/... is now .agents/skills/cookbooks/cosmos3/...). Please note that Cosmos Framework requires DCO sign-off on each commit (git commit -s, see CONTRIBUTING.md). I'm closing this PR because it can't merge here, but the work is welcome there. Please link this PR from the new one so the earlier discussion and reviews carry over. Thanks for your patience, and sorry it sat here while the move happened.