any advice on how to filter that? Seems like I don't find out that information until I've completed a ~8 hour interview process and need to review the final employment offer.

I've also never worked at a company that didn't have that clause.

Bring it up during the initial contact from the recruiter. When they ask about you’re “salary requirements” is when it can be brought up. Ignore the parts on working for competitors (that’s illegal in CA anyways just let the dog be), focus on you’re property only.

When listing projects and ideas last time I got the waiver even while keeping the ideas extremely vague and broadly encompassing. Having said that it isn’t required to even disclose persay.

There aren’t a lot of cases of employers going after an employee unless you directly rip them off or rip off even a part of their valid IP you create. Though if you plan to take VC money at any point they’ll want to see that waiver even if it’s unrelated. If it’s open source there is substantially more leeway.

I’ll let the commenters argue the pedantry. As for OP that’s a very conservative bootlicky answer, every employer has standard boilerplate language against it, you cant filter it out but you can negotiate it away. It’s not an issue usually it’s just some lawyer covering his bases.

Edit: and as a side note California is special in the sense that our economy and brain power is massive. The courts know this and are very worker friendly in this regard. If the lawyers and employers had their way with their insanely restrictive contracts it would severely stifle competition and economic growth/health