The approaches differ in where they draw the boundary. Namespaces use the same kernel but restrict visibility. Seccomp uses the same kernel but restricts the allowed syscall set. Projects like gVisor use a completely separate user-space kernel and make minimal host syscalls. MicroVMs provide a dedicated guest kernel and a hardware-enforced boundary. Finally, WebAssembly provides no kernel access at all, relying instead on explicit capability imports. Each step is a qualitatively different boundary, not just a stronger version of the same thing.
Mr Duffy's directive came as a surprise following recent turmoil in Nasa after Mr Trump's administration announced cuts of 24% to Nasa's budgets in 2026.
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Defense Secretary Pete Hegseth threatened to revoke Anthropic’s $200 million contract with the U.S. military or label the company a supply-chain risk.