diff --git a/agent/.env.example b/agent/.env.example new file mode 100644 index 0000000..1528803 --- /dev/null +++ b/agent/.env.example @@ -0,0 +1 @@ +OPENAI_API_KEY=123456 \ No newline at end of file diff --git a/agent/.gitignore b/agent/.gitignore index f1a90a0..cef2d50 100644 --- a/agent/.gitignore +++ b/agent/.gitignore @@ -138,4 +138,6 @@ dist # Vite files vite.config.js.timestamp-* vite.config.ts.timestamp-* -.vite/ \ No newline at end of file +.vite/ +# LangGraph API +.langgraph_api diff --git a/agent/index.js b/agent/index.js deleted file mode 100644 index 2426580..0000000 --- a/agent/index.js +++ /dev/null @@ -1 +0,0 @@ -console.log("here") \ No newline at end of file diff --git a/agent/index.ts b/agent/index.ts new file mode 100644 index 0000000..96a38aa --- /dev/null +++ b/agent/index.ts @@ -0,0 +1,33 @@ +import { addMessages, entrypoint } from "@langchain/langgraph"; +import { type BaseMessage } from "@langchain/core/messages"; +import { HumanMessage } from "@langchain/core/messages"; +import { modelNode } from "./nodes/model"; +import { toolNode } from "./nodes/tool"; +import 'dotenv/config'; + +const agent = entrypoint({ name: "agent" }, async (messages: BaseMessage[]) => { + let modelResponse = await modelNode(messages); + + while (true) { + if (!modelResponse.tool_calls?.length) { + break; + } + + // Execute tools + const toolResults = await Promise.all( + modelResponse.tool_calls.map((toolCall) => toolNode(toolCall)) + ); + messages = addMessages(messages, [modelResponse, ...toolResults]); + modelResponse = await modelNode(messages); + } + + return messages; +}); + +export {agent} + +const result = await agent.invoke([new HumanMessage("Add 3 and 4.")]); + +for (const message of result) { + console.log(`[${message.getType()}]: ${message.text}`); +} \ No newline at end of file diff --git a/agent/langgraph.json b/agent/langgraph.json new file mode 100644 index 0000000..3b5e924 --- /dev/null +++ b/agent/langgraph.json @@ -0,0 +1,7 @@ +{ + "dependencies": ["."], + "graphs": { + "agent": "./index.ts:agent" + }, + "env": ".env" +} diff --git a/agent/nodes/model.ts b/agent/nodes/model.ts new file mode 100644 index 0000000..58d1772 --- /dev/null +++ b/agent/nodes/model.ts @@ -0,0 +1,21 @@ +import { task, entrypoint } from "@langchain/langgraph"; +import { BaseMessage, SystemMessage } from "@langchain/core/messages"; +import { ChatOpenAI } from "@langchain/openai" +import { arithmeticTools } from "../tools/arithmetic"; + +const model = new ChatOpenAI({ + model: "gpt-5-mini" +}); + +const modelWithTools = model.bindTools(arithmeticTools); + +export const modelNode = task({ name: "callLlm" }, async (messages: BaseMessage[]) => { + + + return modelWithTools.invoke([ + new SystemMessage( + "You are a helpful assistant tasked with performing arithmetic on a set of inputs." + ), + ...messages, + ]); +}); \ No newline at end of file diff --git a/agent/nodes/tool.ts b/agent/nodes/tool.ts new file mode 100644 index 0000000..8c08941 --- /dev/null +++ b/agent/nodes/tool.ts @@ -0,0 +1,8 @@ +import type { ToolCall } from "@langchain/core/messages/tool"; +import { task } from "@langchain/langgraph"; +import { arithmeticToolsByName } from "../tools/arithmetic"; + +export const toolNode = task({ name: "callTool" }, async (toolCall: ToolCall) => { + const tool = arithmeticToolsByName[toolCall.name]; + return tool.invoke(toolCall); +}); \ No newline at end of file diff --git a/agent/package-lock.json b/agent/package-lock.json index 0ab517d..f6a3ce1 100644 --- a/agent/package-lock.json +++ b/agent/package-lock.json @@ -11,7 +11,13 @@ "dependencies": { "@langchain/core": "^1.1.17", "@langchain/langgraph": "^1.1.2", + "@langchain/langgraph-sdk": "^1.5.5", + "@langchain/openai": "^1.2.3", + "dotenv": "^17.2.3", "langchain": "^1.2.14" + }, + "devDependencies": { + "tsx": "^4.21.0" } }, "node_modules/@cfworker/json-schema": { @@ -20,6 +26,448 @@ "integrity": 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"version": "4.0.0", "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz", @@ -376,6 +923,27 @@ "mustache": "bin/mustache" } }, + "node_modules/openai": { + "version": "6.16.0", + "resolved": "https://registry.npmjs.org/openai/-/openai-6.16.0.tgz", + "integrity": "sha512-fZ1uBqjFUjXzbGc35fFtYKEOxd20kd9fDpFeqWtsOZWiubY8CZ1NAlXHW3iathaFvqmNtCWMIsosCuyeI7Joxg==", + "license": "Apache-2.0", + "bin": { + "openai": "bin/cli" + }, + "peerDependencies": { + "ws": "^8.18.0", + "zod": "^3.25 || ^4.0" + }, + "peerDependenciesMeta": { + "ws": { + "optional": true + }, + "zod": { + "optional": true + } + } + }, "node_modules/p-finally": { "version": "1.0.0", "resolved": "https://registry.npmjs.org/p-finally/-/p-finally-1.0.0.tgz", @@ -428,6 +996,16 @@ "node": ">=8" } }, + "node_modules/resolve-pkg-maps": { + "version": "1.0.0", + "resolved": "https://registry.npmjs.org/resolve-pkg-maps/-/resolve-pkg-maps-1.0.0.tgz", + "integrity": 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a/agent/package.json b/agent/package.json index 9f79cf4..fa79ceb 100644 --- a/agent/package.json +++ b/agent/package.json @@ -4,14 +4,20 @@ "description": "Main project pipeline for identifying trigger events", "license": "GPL-3.0", "author": "Will Jeynes", - "type": "commonjs", - "main": "index.js", + "type": "module", + "main": "index.ts", "scripts": { - "dev": "node index.js" + "dev": "tsx run.ts" }, "dependencies": { "@langchain/core": "^1.1.17", "@langchain/langgraph": "^1.1.2", + "@langchain/langgraph-sdk": "^1.5.5", + "@langchain/openai": "^1.2.3", + "dotenv": "^17.2.3", "langchain": "^1.2.14" + }, + "devDependencies": { + "tsx": "^4.21.0" } } diff --git a/agent/run.ts b/agent/run.ts new file mode 100644 index 0000000..1ac727a --- /dev/null +++ b/agent/run.ts @@ -0,0 +1,22 @@ +import { Client } from "@langchain/langgraph-sdk"; + +// only set the apiUrl if you changed the default port when calling langgraph dev +const client = new Client({ apiUrl: "http://localhost:2024"}); +const thread = await client.threads.create(); + +const streamResponse = client.runs.stream( + thread["thread_id"], + "agent", + { + input: [ + { role: "user", content: "3+5" } + ], + streamMode: "messages-tuple", + } +); + +for await (const chunk of streamResponse) { + console.log(`Receiving new event of type: ${chunk.event}...`); + console.log(JSON.stringify(chunk.data)); + console.log("\n\n"); +} \ No newline at end of file diff --git a/agent/tools/arithmetic.ts b/agent/tools/arithmetic.ts new file mode 100644 index 0000000..a695c81 --- /dev/null +++ b/agent/tools/arithmetic.ts @@ -0,0 +1,40 @@ +import { tool } from "@langchain/core/tools"; +import * as z from "zod"; + + +// Define tools +const add = tool(({ a, b }) => a + b, { + name: "add", + description: "Add two numbers", + schema: z.object({ + a: z.number().describe("First number"), + b: z.number().describe("Second number"), + }), +}); + +const multiply = tool(({ a, b }) => a * b, { + name: "multiply", + description: "Multiply two numbers", + schema: z.object({ + a: z.number().describe("First number"), + b: z.number().describe("Second number"), + }), +}); + +const divide = tool(({ a, b }) => a / b, { + name: "divide", + description: "Divide two numbers", + schema: z.object({ + a: z.number().describe("First number"), + b: z.number().describe("Second number"), + }), +}); + +// Augment the LLM with tools +export const arithmeticToolsByName = { + [add.name]: add, + [multiply.name]: multiply, + [divide.name]: divide, +}; + +export const arithmeticTools = Object.values(arithmeticToolsByName); \ No newline at end of file