Security Firewall for Agents — Ryan Dahl, Deno
Aug 17, 2026 · 19:06
Ryan Dahl, CEO of Deno, argues agents must be treated as untrusted software and introduces Claw Patrol, an MIT-licensed proxy that parses every byte leaving an agent below the HTTP layer. At Deno Deploy, agents with write access to Postgres, Kubernetes, ClickHouse, and AWS can be prompt-injected through the support system, so Opus refusing to delete the users table is not enough. Claw Patrol blocks destructive actions even when an agent spawns psql through an EKS endpoint, using HCL rules checked into Git, holds credentials so agents never see them, and can route actions to an LLM judge or Slack approval. A demo shows Codex in yolo mode trying to delete the users table and being blocked. It also includes a unit test system with fixture requests to ensure rules work.
