filterMessages

import { filterMessages, AIMessage, HumanMessage, SystemMessage } from "@langchain/core/messages";

const messages = [
  new SystemMessage("you're a good assistant."),
  new HumanMessage({ content: "what's your name", id: "foo", name: "example_user" }),
  new AIMessage({ content: "steve-o", id: "bar", name: "example_assistant" }),
  new HumanMessage({ content: "what's your favorite color", id: "baz" }),
  new AIMessage({ content: "silicon blue" , id: "blah" }),
];

filterMessages(messages, {
  includeNames: ["example_user", "example_assistant"],
  includeTypes: ["system"],
  excludeIds: ["bar"],
});