Tool use

import json
import os
from anthropic import Anthropic

client = Anthropic(base_url="https://api.naga.ac", api_key=os.environ["NAGAAI_API_KEY"])

tools = [{
    "name": "get_weather",
    "description": "Current weather for a city.",
    "input_schema": {
        "type": "object",
        "properties": {"city": {"type": "string"}},
        "required": ["city"],
    },
}]

def get_weather(city):
    return {"city": city, "temperature_c": 18, "sky": "cloudy"}

messages = [{"role": "user", "content": "What is the weather in Prague?"}]

while True:
    message = client.messages.create(model="claude-sonnet-5", max_tokens=1024, tools=tools, messages=messages)
    messages.append({"role": "assistant", "content": message.content})
    if message.stop_reason != "tool_use":
        break
    results = [
        {"type": "tool_result", "tool_use_id": block.id, "content": json.dumps(get_weather(**block.input))}
        for block in message.content
        if block.type == "tool_use"
    ]
    messages.append({"role": "user", "content": results})

print(next(block.text for block in message.content if block.type == "text"))

import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({ baseURL: "https://api.naga.ac", apiKey: process.env.NAGAAI_API_KEY });

const tools: Anthropic.Tool[] = [{
  name: "get_weather",
  description: "Current weather for a city.",
  input_schema: {
    type: "object",
    properties: { city: { type: "string" } },
    required: ["city"],
  },
}];

const getWeather = ({ city }: { city: string }) => ({ city, temperature_c: 18, sky: "cloudy" });

const messages: Anthropic.MessageParam[] = [{ role: "user", content: "What is the weather in Prague?" }];
let message: Anthropic.Message;

while (true) {
  message = await client.messages.create({ model: "claude-sonnet-5", max_tokens: 1024, tools, messages });
  messages.push({ role: "assistant", content: message.content });
  if (message.stop_reason !== "tool_use") break;
  const results: Anthropic.ToolResultBlockParam[] = message.content
    .filter((block): block is Anthropic.ToolUseBlock => block.type === "tool_use")
    .map((block) => ({
      type: "tool_result",
      tool_use_id: block.id,
      content: JSON.stringify(getWeather(block.input as { city: string })),
    }));
  messages.push({ role: "user", content: results });
}

for (const block of message.content) {
  if (block.type === "text") console.log(block.text);
}