Sessions: investigate related runs

Sessions make it easier to investigate related work across your environment. When sending events, attach a stable session key and ID with meta.sessions, then use the Sessions page to jump from a domain concept like a conversation, support ticket, or import to the runs it produced.

Especially useful for AI agents and long-running workflows where one user action can fan out into multiple functions. Sessions show run counts, failures, recent activity, and the functions involved for each session.