Teams I’ve worked on do gate the merges by passing tests. You’re right; test coverage is insufficient. I’ve never worked anywhere with sufficient test coverage, I truly hope to some day, but new features in my experience have always come with new breakage and new tests.

> Is this advice for small 1 person repos?

I’ve never used a wait to push policy on my own repos, I’d say my policy doesn’t make any sense in that scenario. The goal of the policy is to prevent breaking other people, not to prevent breaking myself.