expect(err).toBeInstanceOf(Error);

const error = err as Error & { code?: string };

expect(error.code).toBe("INVALID_CONFIG");

expect(error.message).toContain("Sandbox mode requires Docker");

expect(error.message).toContain("agents.defaults.sandbox.mode=off");

expect(error.message).toBe(

'Sandbox mode requires Docker, but the "docker" command was not found in PATH. Install Docker (and ensure "docker" is available), or set `agents.defaults.sandbox.mode=off` to disable sandboxing.',

);

});

});

});