You're describing exactly what I distinguish as legitimate AI use, not vibe coding. You're an experienced dev who understands your system deeply, making architectural decisions ("no locks, pass messages instead") and using Claude to implement specific, well-defined tasks faster. The key difference: you could do everything yourself and Claude is doing the typing for you. When you say "None of the above would stump me as an experienced dev", that's the opposite of vibe coding. You're using AI as a typing accelerator for a codebase you understand, not as a replacement for expertise you never developed.