Agent() tool calling loop + Network() ReAct impl. (#17)

* Add anthropic as a provider

This depends on inngest/inngest-js#764, which
exposes model options in Inngest's model provider.  This makes types
happy.

* fix(adapters): `tool_choice = "auto"` + safely parse JSON generated by OpenAI

* fix(agent): implement tool calling loop in `Agent()`

* Fix linting, switch compile error

* Further fixes

* Fix up parsing to be a touch safer

* fix(network): `select_agent` fix + disable iterations on Agent when ran with a network

* feat(demo): restore demo, working demo

* Fix invalid `step` typing being too specific

Also fixes this not being compatible with prev/next versions.

* Use `AiAdapter.Any` for easier subtype checking

* Shift back to stable `inngest` version

* Update agent, state, and tool types

* Allow passing state into `agent.run()` and `new Network()`

* comments

* Comments

---------

Co-authored-by: Tony Holdstock-Brown <[email protected]>
Co-authored-by: Jack Williams <[email protected]>

.husky/pre-commit

@@ -1,4 +1 @@
-#!/bin/sh
-. "$(dirname "$0")/_/husky.sh"
-
 npx lint-staged

demo/inngest.ts

@@ -3,8 +3,9 @@ import {
   anthropic,
   createAgent,
   createNetwork,
-  createTypedTool,
+  createTool,
   defaultRoutingAgent,
+  openai,
 } from "../src/index";
 import { EventSchemas, Inngest } from "inngest";
 import { z } from "zod";
@@ -24,17 +25,16 @@ export const fn = inngest.createFunction(
   { id: "agent" },
   { event: "agent/run" },
   async ({ event, step }) => {
-    const model = anthropic({ model: "claude-3-5-haiku-latest", max_tokens: 1024, step });
+    const model = openai({ model: "gpt-4", step });
 
-    // 1. Single agents
-    //
+    //  1. Single agent
+
     // Run a single agent as a prompt without a network.
-    const { output, raw } = await codeWritingAgent.run(event.data.input, {
+    await codeWritingAgent.run(event.data.input, {
       model,
     });
 
-    // 2. A network of agents that works together
-
+    //  2. A network of agents that works together
     const network = createNetwork({
       agents: [
         codeWritingAgent.withModel(model),
@@ -61,8 +61,7 @@ export const fn = inngest.createFunction(
 );
 
 const systemPrompt =
-  "You are an expert TypeScript programmer.  Given a set of asks, think step-by-step to plan clean, " +
-  "idiomatic TypeScript code, with comments and tests as necessary.";
+  "You are an expert TypeScript programmer.  You can create files with idiomatic TypeScript code, with comments and associated tests.";
 
 const codeWritingAgent = createAgent({
   name: "Code writer",
@@ -99,9 +98,9 @@ const codeWritingAgent = createAgent({
     //   "Do not respond with anything else other than the following XML tags:" +
     //   "- If you would like to write code, add all code within the following tags (replace $filename and $contents appropriately):" +
     //   "  <file name='$filename.ts'>$contents</file>";
-    createTypedTool({
-      name: "write_files",
-      description: "Write code with the given filenames",
+    createTool({
+      name: "create_files",
+      description: "Create files with the given filenames and contents",
       parameters: z
         .object({
           files: z.array(
@@ -141,7 +140,7 @@ const executingAgent = createAgent({
     },
   },
 
-  system: `You are an export TypeScript engineer that can execute commands, run tests, debug the output, and make modifications to code.
+  system: `You are an expert TypeScript engineer that can execute commands, run tests, debug the output, and make modifications to code.
 
 Think carefully about the request that the user is asking for. Do not respond with anything else other than the following XML tags:
 

demo/package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "@inngest/agent-kit": "~0.0.1",
     "express": "^4.21.1",
-    "inngest": "^3.26.2"
+    "inngest": "^3.27.3"
   },
   "devDependencies": {
     "@types/express": "^5.0.0",

package.json

@@ -8,7 +8,8 @@
     "build": "rm -rf dist && tsc",
     "lint": "eslint .",
     "release": "pnpm run build && changeset publish",
-    "prepare": "husky install"
+    "prepare": "husky install",
+    "dev": "nodemon --watch demo -e ts --exec \"ts-node -P tsconfig-demo.json demo/index.ts\""
   },
   "files": [
     "dist"
@@ -38,14 +39,16 @@
     }
   },
   "dependencies": {
-    "inngest": "3.27.1",
+    "inngest": "^3.27.4",
+    "express": "^4.21.1",
     "openai-zod-to-json-schema": "^1.0.3",
     "zod": "^3.23.8"
   },
   "packageManager": "[email protected]",
   "devDependencies": {
     "@changesets/cli": "^2.27.10",
     "@eslint/js": "^9.15.0",
+    "@types/express": "^5.0.0",
     "@types/node": "^22.9.1",
     "@typescript-eslint/eslint-plugin": "^8.15.0",
     "@typescript-eslint/parser": "^8.15.0",
@@ -54,7 +57,9 @@
     "eslint-plugin-prettier": "^5.2.1",
     "husky": ">=7",
     "lint-staged": ">=10",
+    "nodemon": "^3.0.2",
     "prettier": "^3.3.3",
+    "ts-node": "^10.9.2",
     "typescript": "^5.6.3",
     "typescript-eslint": "^8.15.0"
   },