npm install @better-agent/anthropic

import { defineAgent } from "@better-agent/core";
import { anthropic } from "@better-agent/anthropic";

export const supportAgent = defineAgent({
  name: "support",
  model: anthropic("claude-sonnet-4-5"),
  instruction: "You help customers.",
});

import { createAnthropic } from "@better-agent/anthropic";

const anthropic = createAnthropic({
  apiKey: process.env.ANTHROPIC_API_KEY,
});

const agent = defineAgent({
  name: "researcher",
  model: anthropic("claude-sonnet-4-5"),
  tools: [
    anthropic.tools.webSearch_20250305({ maxUses: 3 }),
  ],
});

const text = anthropic.text("claude-sonnet-4-5");

const classify = defineTool({
  name: "classify_ticket",
  description: "Classify a support ticket.",
  inputSchema: z.object({
    message: z.string(),
  }),
  execute: async ({ message }) => {
    const result = await text.generate({
      input: `Return one label for this ticket: billing, bug, sales, or other.\n\n${message}`,
    });

    return { label: result.text.trim() };
  },
});

await app.agent("support").run({
  messages,
  providerOptions: {
    anthropic: {
      thinking: { type: "enabled", budgetTokens: 1024 },
    },
  },
});