Cheat Sheet
| Question | Core Idea | Senior Signal |
|---|---|---|
| Q176 | State ownership | Classify state by source of truth, lifetime, shareability, and invalidation. |
| Q177 | Effect fetching | Prevent stale responses with cleanup, aborts, request ids, or cache libraries. |
| Q178 | Hydration | Server and first client render must agree before browser-only behavior runs. |
| Q179-Q180 | Architecture | Layouts preserve state; capstones should connect routes, boundaries, UX, and delivery. |