“STATEFUL SYSTEMS ARE INCREDIBLY HARD TO BUILD”: HOW PERPLEXITY THINKS ABOUT AI AGENT SANDBOXES

Summary from the TLDR IT newsletter

Perplexity's SPACE platform separates short-lived Firecracker microVM sandboxes from durable sessions that can be paused, resumed, moved, or forked across clusters without losing an agent's work. The architecture uses frequent snapshots, isolated credential handling, and network controls to securely support long-running agents at a scale of millions of sandbox creations and tens of millions of reconnects.