CUDA codepath !

I had a lot of fun creating and properly optimizing a codepath for CUDA with Claude Opus 4.5 would you like me to PR it (then I rebase it)?

I use an agentic workflow with Claude Opus 4.5 via MCP (Model Context Protocol). The setup:
- Local infrastructure: dedicated container server equipped with NVIDIA RTX PRO 6000 Blackwell
- Agentic loop: implement -> compile -> benchmark -> compare images (same testing script) -> human review & commit ....
- Observed max_diff=9 for 1024 vs reference image (from the python testing script).
- Speedup 1024 x 1024 from 118.4s on CPU+BLAS to 11.4s on CUDA (10.4x)

WDYT?

### CPU+BLAS :

### CUDA :

### CPU+BLAS :

### CUDA :

### CPU+BLAS :

### CUDA :