Create ISO images with a startup script to gather facts about CPU, RAM, storage, etc., and send the facts back to another computer.
Create an ISO with a wormhole code baked in
WORMHOLE_CODE=123-my-s3cr3t-code nix build .#packages.x86_64-linux.gather-facts --impure
Boot off of the created iso image (found in result/iso), then listen on any other computer to download the facts about the computer you booted off of.
wormhole receive 123-my-s3cr3t-code --accept-file
(optionally, use a compatible wormhole client like Warp instead)