Meta details Muse agent safety: sandboxed harness, Sentinel gatekeeper, user-held encryption

unixterminal · x · 2026-09-09

Meta Superintelligence Labs published a deep dive into securing Muse, its personal agent that gets inbox, calendar and shell access and spawns swarms of subagents. Key points: specialized training for zero-shot CLI/skills tool calling, long context and prompt-injection awareness; a harness isolated in its own cell with no real credentials; every external interaction gated by an agent-override-proof Sentinel; hardening via dogfooding, agentic red teaming and a private bug bounty. Meta also announced Muse Confidential VM, encrypting the entire VM with a user-held key even Meta can't access.

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