Claude Code is remarkably capable. But out of the box it does what you prompt — and most prompts quietly skip the checks a senior engineer would never skip. Ask it to "fix the slow endpoint" and it will happily eager-load a relation and call it done, without ever proving the slowness was an N+1 or measuring the result. The capability is there. The discipline is not — because you did not ask for it. The fix is not a bigger prompt. It is encoding the workflow as a skill . What ...