FoundationHazelJS
Checkpoint
Persisted run state at a safe point so execution can continue without restarting from scratch.
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Direct answer
Persisted run state at a safe point so execution can continue without restarting from scratch.
Plain language
A save game for the agent run.
Technical explanation
Durable write of AgentRun position and metadata after completing a step or before durableSuspend wait; must align with idempotent side effects.
Example
After a successful ticket update tool, HazelJS stores step completion before the next model call or HITL suspend.