Addy Osmani laid out the engineering primitives for loop engineering beautifully, but the article ends where the architecture decision begins. For agents running loops that touch regulated data and business-critical pipelines, the winners will not have the fastest loops — they will have the best control plane.

Claude Code surfaces an interesting tradeoff between skills and hooks — but governance ends up spread across hooks, settings, plugins, and frontmatter rather than living natively in the workflow itself. The next evolution is runtime-native governance, where key checks become structural guarantees instead of distributed control points.