Crust

Crust is a lightweight security layer for AI agents focused on preventing sensitive data exposure and unsafe agent behavior. It runs as a high-performance Go gateway and is positioned as an easy one-command install that works with any agent framework. The project emphasizes practical guardrails, low overhead, and rapid adoption for teams running agents in real workflows. Crust also offers a Pro/enterprise path via early access for teams that need advanced capabilities.

Use Crust when you need to enforce runtime safety controls for AI agents, especially to block secret access, unauthorized actions, or destructive operations. It is a strong fit when you want open-source guardrails that are fast to deploy and add minimal latency.