Function isAddressedToAnotherUser

server/src/addie/thread-utils.ts:73–76

(messageText: string, botUserId: string)

 * many humans are in the thread.
 */
export function isAddressedToAnotherUser(messageText: string, botUserId: string): boolean {
  const match = /^<@(U[A-Z0-9]+)>/.exec(messageText.trim());
  return !!(match && match[1] !== botUserId);
}

/**
 * In a multi-party thread, determine whether a message is directed at Addie.