State management path

Work the state layer end to end — actions, reducers, selectors, middleware and normalisation — in the order each idea depends on the last. The track for anyone whose interviews lean on data flow.

12 questions, in order.

1. Implement Redux-style action creators coding · easy · state
2. Apply Middleware to a Store's Dispatch coding · medium · state
3. Combine Reducers coding · medium · state
4. Implement a Redux-style reducer with immutability coding · medium · state
5. Deep clone a value coding · medium · state
6. Write an eval set for an Agent Skill harness · hard · state
7. Guardrail a store's shape harness · hard · state
8. Memoize a derived selector coding · medium · state
9. What order does middleware run in? quiz · medium · state
10. Normalise a nested API response coding · hard · state
11. Design an offline-first task list system-design · medium · state
12. Retry a request with backoff coding · hard · state

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