ZDoom

That's precisely what I am hoping for.

Keep in mind even if you do this, CVAR latches are only saved on the console side.

If you modify the CVARs internally they will not latch.

Agreed, a useful one. It should be a keyword: "latch".

Very interesting, would actually like this too. Currently I'm storing the CVar as well, but it would be nice to have the latch warning, provided that it's feasible to do.

I see that the “skill” CVar is latched. Changes to it do not take effect until a new game is started, and it says so in the console.

Please allow CVARINFO-defined CVars to be latched like this, as well.

The intended use case is to have additional difficulty settings that, like “skill”, only take effect on a new game. Currently, the only way I know of to do that is to capture the CVars' values upon game startup, and store them in a global somewhere, but that doesn't make the latch warning appear on the console.