- README: add a refine loop (re-run /define-design or /update-design) between
/define-design and /generate-app, in both Usage Workflow and the
recommended workflow
- generate-app: note that it generates from the design as-is; refine first
- define-design: next steps now refine before generating code
- update-design: broaden to cover pre-generation refinement
- AGENTS.md: add the refine step to the initial setup flow