useState for state

useEffect for lifecycle

useEffect cleanup function

useEffect dependency array

useContext replaces HOC

Custom hook replaces HOC

useMemo for expensive calc

useCallback for handler

React.memo on list component

No class components

ActivityFeed cleanup

createRoot import

createRoot usage

No ReactDOM.render

useTransition import

startTransition for results

isPending indicator

lazy() for route components

Suspense wrapper

No eager admin imports

Migration notes accuracy

StrictMode preserved

jscodeshift used

rename-unsafe-lifecycles transform

update-react-imports transform

TypeScript parser flag

Dry run step

Dry run before apply

src/ directory targeted

Script comments

No manual edits