Command Zero is an autonomous and user-led cyber investigation platform designed to transform security operations in complex enterprise environments. By integrating expert investigative content, advanced large language models (LLMs), and automation, it empowers security teams to conduct thorough investigations and threat hunts efficiently. The platform reduces the reliance on technology-specific expertise, enabling analysts to interact seamlessly with diverse systems without direct access or specialized knowledge. This approach streamlines the investigative process, enhances consistency, and accelerates the resolution of escalated cases.