Your Prompts Are Technical Debt: Why Scaffolding Built for Older Models Hinders Newer Ones

When Anthropic shipped Claude Opus 5 on July 24, 2026, the team at Every &#x2014; a publication that runs much of its editorial and engineering operation on Claude-based agents &#x2014; spent a week testing it before publishing their verdict. The title of their review, " Vibe Check: Claude Opus