Building Pre-Execution Security Guardrails for Autonomous AI Agents (FastAPI + Python)

Autonomous AI agents that execute terminal commands or run code loops need strict safety boundaries before running shell operations.

We built Veltra, an open-source pre-execution security engine written in Python and FastAPI.

We recently verified Veltra against browser-use terminal execution workflows, passing all 48 test suites cleanly with median library overhead between 1.3ms and 3.3ms.

Would love to hear any thoughts or feedback from the developer community!****