> The best way to prevent a divergent representation is to avoid including undefined behavior in a program. That’s not particularly actionable advice, though.

I mean... It is pretty actionable TBH. There are sanitizers you can use to detect UB. You could use a memory safe language. You could use a fuzzer. You could improve your test coverage. You could use static analysis tools. All of these can help reduce the chance of UB in your program.