ClassifyNode

Process scope: the subflow that undoes this node's effect if the instance is cancelled or fails later.

From each outlet the node type declares to the id of the next node; every declared outlet is mapped.

Named ZEN expressions evaluated before the node runs, typed against the node's input schema.

The JSON Schema subset the output is validated against (the one Tool parameters use); an invalid output is retried at most twice, then takes on_failure with schema_invalid. A retrieve node needs none from 1.59.0: its output is the platform's RetrieveNodeOutput.

Writes fields of the node's output to declared slots (conversation) or vars (process).

Every node that waits has one, with a default per type.