Do you know what "semiactive" is/means?

I guess so.

Command guidance? I'll bet a HARM would just LOVE that.

Sure,but you will need a HARM with at least 150+ miles range to start with.


An active radar seeker on a AAM likely wouldn't work very well against
stealh. You'd be better off with an IIR seeker.

If you can come close enough to stealth (or stealth comes close enough to you
)everything works.
If you want to increase your chances you might even upgrade SAMs with multi
spectral seekers.

A high frequency radar against a stealth aircraft?

But of course,during terminal phase everything works.We are talking about very
close ranges.