2945 bytes. Less than 0.006% of Wasmtime, smaller than a C “Hello, world!”.
Zero dependencies, no cheating: just a static x86-64 Linux executable. Scan the QR code above with zbarimg --raw -Sbinary or another QR decoder that supports binary data, or directly download the program from the GitHub repo, and you’re good to go.
Nothing could ever go wrong with having binary data in a QR code