The technological perimeter of the state is being fortified through deliberate cognitive enclosure. Anthropic has formally halted the public release of its Mythos autonomous hacking model, electing instead to restrict the system to a highly vetted coalition of state and corporate partners under Project Glasswing. This decision fundamentally alters the trajectory of algorithmic supremacy. Generative artificial intelligence capable of orchestrating complex zero-day exploit chains has been correctly identified as a sovereign weapon rather than a commercial utility. Preliminary testing demonstrated the model's severe capacity to autonomously dismantle major operating systems and circumvent embedded safeguards. By locking this capability behind a corporate and federal gate, Anthropic ensures that offensive digital capabilities remain entirely governed by institutional authorities. The restriction forces a massive, capital-intensive cybersecurity auditing cycle across global enterprise networks. Defenders are now racing to utilise the restricted Mythos framework to identify critical vulnerabilities before adversarial state actors successfully replicate the architecture. The digital commons is being systematically enclosed to extract security rents and preserve the structural integrity of the American intelligence apparatus.