Code Runner

Featured Community

Run code snippets safely in a sandbox—Python, JavaScript, and Shell.

Lucy v1.0.0

Install command

$ curl -sSL https://skillhub.lucyos.ai/i/code-runner | sh

Copy command

Required tools

python3

Sandboxed execution for Python, JavaScript, and Shell with captured stdout/stderr, timeouts, and resource limits.

(SKILL.md content)

#!/usr/bin/env python3
"""Sandboxed code execution with timeout and resource limits."""

import subprocess
import sys
import tempfile
import os

def run_code(code: str, lang: str = 'python', timeout: int = 30):
    """Execute code in a subprocess with timeout."""
    with tempfile.NamedTemporaryFile(mode='w', suffix=f'.{lang}', delete=False) as f:
        f.write(code)
        f.flush()
        try:
            cmd = ['python3', f.name] if lang == 'python' else ['node', f.name]
            result = subprocess.run(cmd, capture_output=True, text=True, timeout=timeout)
            return {'stdout': result.stdout, 'stderr': result.stderr, 'code': result.returncode}
        except subprocess.TimeoutExpired:
            return {'stdout': '', 'stderr': 'Execution timed out', 'code': -1}
        finally:
            os.unlink(f.name)

if __name__ == '__main__':
    import json
    code = sys.stdin.read()
    result = run_code(code)
    print(json.dumps(result, indent=2))