i'm testing to see if doing new feature roll-outs can help me eval whether a refactor was good or not - very similar to approach here. my intuition is that good refactors should reduce tokens used by downstream coding agents. haven't seen a big difference yet but it might just be that i need to do more rollouts (lots of variance in tokens used per run). in my experience you have to intentionally 'mow the lawn' or things get out of hand so i'm always looking for slop signals.