Function useIssueFlagBanner

src/hooks/useIssueFlagBanner.ts:92–133

(
  messages: Message[],
  submitCount: number,
)

const COOLDOWN_MS = 30 * 60 * 1000

export function useIssueFlagBanner(
  messages: Message[],
  submitCount: number,
): boolean {
  if (process.env.USER_TYPE !== 'ant') {
    return false
  }

  // biome-ignore lint/correctness/useHookAtTopLevel: process.env.USER_TYPE is a compile-time constant
  const lastTriggeredAtRef = useRef(0)
  // biome-ignore lint/correctness/useHookAtTopLevel: process.env.USER_TYPE is a compile-time constant
  const activeForSubmitRef = useRef(-1)

  // Memoize the O(messages) scans. This hook runs on every REPL render
  // (including every keystroke), but messages is stable during typing.
  // isSessionContainerCompatible walks all messages + regex-tests each
  // bash command — by far the heaviest work here.
  // biome-ignore lint/correctness/useHookAtTopLevel: process.env.USER_TYPE is a compile-time constant
  const shouldTrigger = useMemo(
    () => isSessionContainerCompatible(messages) && hasFrictionSignal(messages),
    [messages],
  )

  // Keep showing the banner until the user submits another message
  if (activeForSubmitRef.current === submitCount) {
    return true
  }

  if (Date.now() - lastTriggeredAtRef.current < COOLDOWN_MS) {
    return false
  }
  if (submitCount < MIN_SUBMIT_COUNT) {
    return false
  }
  if (!shouldTrigger) {
    return false
  }

  lastTriggeredAtRef.current = Date.now()
  activeForSubmitRef.current = submitCount
  return true
}