Second assembly line point · Structured handoffsSession and State
Each session is a single, continuous conversational lifecycle and execution boundary between a user and your agent. It is composed of:
1
Identification (id, appName, userId)a unique identifier for this specific conversation thread, agent application and a particular user.
2
Activity tracking (lastUpdateTime)a timestamp of the last time an event occurred in this conversation thread.
3
History (events)a chronological sequence of all interactions (Event objects: user messages, agent responses, tool actions) in this thread. All interactions in the web UI are here.
4
Session State (state)a place to store temporary data relevant only to this ongoing conversation, acting as a scratchpad for the agent during the interaction.
scratchpad