Yes, but no need for the added complexity of a delta of warnings against the base branch. The presumption here (given the GP comment) is that main has no warnin

Yes, but no need for the added complexity of a delta of warnings against the base branch. The presumption here (given the GP comment) is that main has no warnings, since warnings are only allowed "during development", and should be cleaned up before production. So the CI only has to be intelligent enough to prevent merging (to main) of a branch with any warnings.