AR GPU Preflight

Single source of truth for two questions before any code runs:

1. Does this run need GPU, and if so, how much?
2. Is the system in a state where running it now is safe (RED/YELLOW/GREEN)?

This skill is independent. Do not skip it because some other orchestrator "should" handle preflight.

When To Run

Always, before:

• python <script> or bash run.sh if the script may take > 30s
• anything importing torch, jax, tensorflow
• anything containing cuda, .cuda(), .to("cuda"), device="cuda"
• training or inference of any model
• large downloads or checkpoint writes