Perplexity just open-sourced its agent defense layer
Perplexity has open-sourced Numbat, a security suite designed to watch what AI agents actually do on your machines and stop dangerous actions before they happen â and thatâs a big deal for anyone taking agentic AI seriously in 2026. Instead of yet another abstract âAI safetyâ whitepaper, this is the guts of Perplexityâs own internal agent defense layer, shipped as an Apache 2.0 Go binary you canâŚ









