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A new per-session onAssistantRound hook fires after assistant and tool rounds for the main agent, with unclear scope.
A new per-session hook, onAssistantRound, is now registered and invoked with { context, messages } after assistant/tool rounds, but only for the main agent. A second site assigns z.onAssistantRound = LWt for some subsystem, but what installs the listener and what it does is not yet clear.
Names in the bundleonAssistantRound