GPU-only mode requires 40GB+ VRAM. This rule enforces checking GPU memory before running non-offload tests to prevent OOM errors on consumer GPUs (3090/4090). Generated with [Claude Code](https://claude.ai/code) via [Happy](https://happy.engineering) Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: Happy <yesreply@happy.engineering>