Method _command_exists

run_system.py:213–220

Check if a command exists in PATH.

(self, command: str)

        return True
    
    def _command_exists(self, command: str) -> bool:
        """Check if a command exists in PATH."""
        try:
            subprocess.run([command, '--version'], 
                         capture_output=True, check=True, timeout=5)
            return True
        except (subprocess.CalledProcessError, subprocess.TimeoutExpired, FileNotFoundError):
            return False
    
    def ensure_models(self):
        """Ensure required Ollama models are available."""