@sanity/assist/src/_lib/usePrevious.ts

You create the instructions; Sanity AI Assist does the rest.

import {useEffect, useRef} from 'react'

export function usePrevious<T>(value: T) {
  const ref = useRef<T>()
  useEffect(() => {
    ref.current = value
  }, [value])
  return ref.current
}