import { BaseMessage } from "@langchain/core/messages";

export function formatMessages(messages: BaseMessage[]): string {
  return messages
    .map((m, i) => {
      const role = m.getType();
      const contentString =
        typeof m.content === "string" ? m.content : JSON.stringify(m.content);
      return `<${role} index="${i}">\n${contentString}\n</${role}>`;
    })
    .join("\n");
}