fix: update langchainjs (#2136)

quick update of the langchainjs example to quiet down some dependency security scanner noise

Signed-off-by: Dave Lee <dave@gray101.com>

examples/langchain/langchainjs-localai-example/package.json

@@ -1,6 +1,6 @@
 {
   "name": "langchainjs-localai-example",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "Trivial Example of using langchain + the OpenAI API + LocalAI together",
   "main": "index.mjs",
   "scripts": {
@@ -15,7 +15,11 @@
     "typescript": "^5.0.4"
   },
   "dependencies": {
-    "langchain": "^0.0.67",
-    "typeorm": "^0.3.15"
+    "@langchain/community": "^0.0.52",
+    "@langchain/openai": "^0.0.28",
+    "langchain": "^0.1.36"
+  },
+  "overrides": {
+    "@langchain/core": "0.1.5"
   }
 }

examples/langchain/langchainjs-localai-example/src/index.mts

@@ -1,15 +1,17 @@
-import { OpenAIChat } from "langchain/llms/openai";
 import { loadQAStuffChain } from "langchain/chains";
 import { Document } from "langchain/document";
-import { initializeAgentExecutorWithOptions } from "langchain/agents";
-import {Calculator} from "langchain/tools/calculator";
+import { pull } from "langchain/hub";
+import { AgentExecutor, createOpenAIToolsAgent } from "langchain/agents";
+import {Calculator} from "@langchain/community/tools/calculator";
+import { ChatOpenAI } from "@langchain/openai";
+import type { ChatPromptTemplate } from "@langchain/core/prompts";
 
 const pathToLocalAI = process.env['OPENAI_API_BASE'] || 'http://api:8080/v1';
 const fakeApiKey = process.env['OPENAI_API_KEY'] || '-';
 const modelName = process.env['MODEL_NAME'] || 'gpt-3.5-turbo';
 
-function getModel(): OpenAIChat {
-  return new OpenAIChat({
+function getModel(): ChatOpenAI {
+  return new ChatOpenAI({
     prefixMessages: [
       {
         role: "system",
@@ -29,8 +31,8 @@ function getModel(): OpenAIChat {
 // Minimal example.
 export const run = async () => {
   const model = getModel();
-  console.log(`about to model.call at ${new Date().toUTCString()}`);
-  const res = await model.call(
+  console.log(`about to model.invoke at ${new Date().toUTCString()}`);
+  const res = await model.invoke(
     "What would be a good company name a company that makes colorful socks?"
   );
   console.log(`${new Date().toUTCString()}`);
@@ -47,7 +49,7 @@ export const run2 = async () => {
     new Document({ pageContent: "Harrison went to Harvard." }),
     new Document({ pageContent: "Ankush went to Princeton." }),
   ];
-  const resA = await chainA.call({
+  const resA = await chainA.invoke({
     input_documents: docs,
     question: "Where did Harrison go to college?",
   });
@@ -58,22 +60,33 @@ await run2();
 
 // Quickly thrown together example of using tools + agents.
 // This seems like it should work, but it doesn't yet.
-export const temporarilyBrokenToolTest = async () => {
+export const toolAgentTest = async () => {
   const model = getModel();
 
-  const executor = await initializeAgentExecutorWithOptions([new Calculator(true)], model, {
-    agentType: "zero-shot-react-description",
+  const prompt = await pull<ChatPromptTemplate>("hwchase17/openai-tools-agent");
+
+  const tools = [new Calculator()];
+
+  const agent = await createOpenAIToolsAgent({
+    llm: model,
+    tools: tools,
+    prompt: prompt
   });
 
   console.log("Loaded agent.");
 
+  const agentExecutor = new AgentExecutor({
+    agent,
+    tools,
+  });
+
   const input = `What is the value of (500 *2) + 350 - 13?`;
 
   console.log(`Executing with input "${input}"...`);
 
-  const result = await executor.call({ input });
+  const result = await agentExecutor.invoke({ input });
 
   console.log(`Got output ${result.output}`);
 }
 
-await temporarilyBrokenToolTest();
+await toolAgentTest();

examples/langchain/langchainjs-localai-example/tsconfig.json

@@ -8,7 +8,8 @@
     "esModuleInterop": true,
     "allowSyntheticDefaultImports": true,
     "isolatedModules": true,
-    "outDir": "./dist"
+    "outDir": "./dist",
+    "skipLibCheck": true
   },
   "include": ["src", "test"],
   "exclude": ["node_modules", "dist"]