The best QA isn’t just about finding bugs. It’s about bringing quality to the codebase: typing, better static analysis, linters, and useful libraries. In the other direction, it’s also about integrating into the release process by using integrating the what-goes-on / what-stays-in-beta decisions into quality’s approach to giving signal over any other part of the codebase.

Anything that involves gating bits of code, basically, and deciding whether to gate bits of code or not.