Build a Coding Agent

import json
from openai import OpenAI

client = OpenAI(
    base_url="https://kymaapi.com/v1",
    api_key="ky-your-api-key"
)

tools = [{"type": "function", "function": {
    "name": "run_python", "description": "Execute Python code and return the output",
    "parameters": {"type": "object", "properties": {
        "code": {"type": "string"}}, "required": ["code"]}}}]

def run_python(code: str) -> str:
    import subprocess
    r = subprocess.run(["python3", "-c", code], capture_output=True, text=True, timeout=10)
    return r.stdout or r.stderr

messages = [
    {"role": "system", "content": "You are a coding assistant. Use run_python to test your code."},
    {"role": "user", "content": "Write a function to find all prime numbers up to 50."}
]
while True:
    response = client.chat.completions.create(
        model="qwen-3-coder", messages=messages, tools=tools, temperature=0)
    msg = response.choices[0].message
    messages.append(msg)
    if response.choices[0].finish_reason != "tool_calls":
        print(msg.content); break
    for call in msg.tool_calls:
        result = run_python(json.loads(call.function.arguments)["code"])
        messages.append({"role": "tool", "tool_call_id": call.id, "content": result})

import OpenAI from "openai";
import { execSync } from "child_process";

const client = new OpenAI({
  baseURL: "https://kymaapi.com/v1",
  apiKey: "ky-your-api-key",
});

const tools = [{
  type: "function",
  function: {
    name: "run_python",
    description: "Execute Python code and return the output",
    parameters: {
      type: "object",
      properties: { code: { type: "string" } },
      required: ["code"],
    },
  },
}];

const messages = [
  { role: "system", content: "You are a coding assistant. Use run_python to test your code." },
  { role: "user", content: "Write a function to find all prime numbers up to 50." },
];

while (true) {
  const response = await client.chat.completions.create({
    model: "qwen-3-coder", messages, tools, temperature: 0,
  });
  const msg = response.choices[0].message;
  messages.push(msg);
  if (response.choices[0].finish_reason !== "tool_calls") {
    console.log(msg.content);
    break;
  }
  for (const call of msg.tool_calls) {
    const code = JSON.parse(call.function.arguments).code;
    const result = execSync(`python3 -c "${code.replace(/"/g, '\\"')}"`, { encoding: "utf8" });
    messages.push({ role: "tool", tool_call_id: call.id, content: result });
  }
}