Anthropic Code Interpreter

npm install @declaw/sdk dotenv @anthropic-ai/sdk

import { Sandbox } from "@declaw/sdk";
import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic();

const response = await client.messages.create({
  model: "claude-sonnet-4-20250514",
  max_tokens: 1024,
  messages: [
    {
      role: "user",
      content:
        "You are a Python code interpreter. When asked a question, respond ONLY with Python code that computes the answer and prints it. No markdown, no explanation, just code.\n\nQuestion: What are the first 15 Fibonacci numbers?",
    },
  ],
});

function stripCodeFences(code: string): string {
  let cleaned = code.trim();
  if (cleaned.startsWith("```")) {
    cleaned = cleaned.split("\n").slice(1).join("\n");
  }
  if (cleaned.endsWith("```")) {
    cleaned = cleaned.split("\n").slice(0, -1).join("\n");
  }
  return cleaned.trim();
}

const rawText =
  response.content[0].type === "text" ? response.content[0].text : "";
const code = stripCodeFences(rawText);

const sbx = await Sandbox.create({ template: "python", timeout: 300 });
try {
  await sbx.files.write("/tmp/solution.py", code);
  const result = await sbx.commands.run("python3 /tmp/solution.py", {
    timeout: 30,
  });
  console.log(result.stdout);
  console.log(result.exitCode);
} finally {
  await sbx.kill();
}

const code = `
def fibonacci(n):
    a, b = 0, 1
    result = []
    for _ in range(n):
        result.append(a)
        a, b = b, a + b
    return result

print("First 15 Fibonacci numbers:", fibonacci(15))
print("Sum of first 100 integers:", sum(range(1, 101)))
`.trim();

const sbx = await Sandbox.create({ template: "python", timeout: 300 });
try {
  await sbx.files.write("/tmp/demo.py", code);
  const result = await sbx.commands.run("python3 /tmp/demo.py", { timeout: 30 });
  console.log(result.stdout);
} finally {
  await sbx.kill();
}