Using hex programs

[Sage Gerard]

Hi, I'm still reading the code. I'm having trouble figuring a couple of
things out.

When checking out stage0, I found
https://github.com/oriansj/bootstrap-seeds/tree/cfa108377c15382f58b20394150840e1099b6767

The README says never to trust anything. Does this mean it's encouraging
you to hand-convert ASCII Hex to a binary before executing stage0?

Also: The materials I'm reading just say "hex program" without
mentioning CPU architecture. Isn't a hex program a particular encoding
of an ELF executable for an architecture, or is there more to it than
that? My understanding is that you want to hand-code the seed so that
you know it's fine for yourself, but the seed is architecture dependent.