Claude Code for API Design: How I Stopped Shipping Endpoints I Regret Six Months Later

Originally published on Hashnode. Cross-posted for the DEV.to community. The first public API I designed had 47 endpoints. Eight months later, 31 of them were either deprecated, broken, or quietly ignored by the only client that ever consumed them. Two were so badly named that we shipped a v2 just to rename them. One returned a different shape depending on which day of the week you called it, because of a bug nobody had caught in code review. The whole thing was a monument to what happens when...