Why were you surprised?

You can check out here how it does that: https://github.com/AlexsJones/llmfit/blob/main/llmfit-core/s...

To detect NVIDIA GPUs, for example: https://github.com/AlexsJones/llmfit/blob/main/llmfit-core/s...

In this case it just runs the command "nvidia-smi".

Note: llmfit is not web-based.