Function mkSentinel

src/hooks/useAssistantHistory.ts:101–111

(text: string)

  const sentinelUuidRef = useRef(randomUUID())

  function mkSentinel(text: string): SystemInformationalMessage {
    return {
      type: 'system',
      subtype: 'informational',
      content: text,
      isMeta: false,
      timestamp: new Date().toISOString(),
      uuid: sentinelUuidRef.current,
      level: 'info',
    }
  }

  /** Prepend a page at the front, with scroll-anchor snapshot for non-initial.
   *  Replaces the sentinel (always at index 0 when present) in-place. */