react-state-data-flow-review

Review React state by checking source-of-truth ownership, derived state that should be computed during render, async state modeling, and cache synchronization. This Skill inspects a named diff or files and reports findings with severity, evidence, and minimal fixes.

Search for server or cache data copied into local state without a draft, optimistic, or offline reason. The review flags components that mirror query result fields into useState and recommends using the query library's source-of-truth state and selectors instead.

Yes, the review covers frameworks with server data loading, React Server Components, server actions, and route loaders. It checks for client-side fetching when server data exists, hydration-sensitive state, and URL params treated as local state.

Use useReducer when several fields must change together in one domain transition, such as multi-step forms or event-driven state machines. The review flags scattered setters and vague actions like a generic set payload, recommending domain-named actions instead.

The review only covers the scoped files or diff, not the whole application, and it does not address hook lifecycle, dependency, or cleanup bugs. Missing context is reported as a limitation rather than a finding, and no issues means no issues in scope only.