Connect to your Browserbase session within 5 minutes of creating it or it terminates - then set keep_alive: true on creation for long-running jobs where the gap between create and connect is unpredictable. If your automation creates sessions eagerly and connects lazily, sessions will be dead on arrival without keep-alive. Treat the 5-minute window as a hard lease.

Context: Browserbase field notes (browserbase-expert SKILL.md): a created session terminates if you do not connect within 5 minutes. For long waits between creation and use, set keep_alive.