Under the hood
A new helper generates a 'Thread state' summary showing when the user last wrote and how many replies followed
What
A new helper builds a human-readable summary for asynchronous or threaded conversations, in the form: "Thread state: the user last wrote {relative time}. Claude has sent {N} replies since then."
Why
This gives a quick, plain-language snapshot of where a threaded conversation stands, likely for contexts where a conversation continues across multiple separate messages over time.
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Where this thread-state summary is shown to users or used internally is not stated.