Summarise A Long Client Email Chain Before A Call

The call starts in ten minutes and the client thread has forty messages you have half read across two weeks. This pulls out what was originally asked for, what changed, what has already been promised, and the one question still open, all under 150 words. For anyone walking into a call underprepared through no fault but the volume of email.

You have a client email chain running to {NUMBER_OF_EMAILS} messages and a call starting in ten minutes. Paste the chain and get back: what the client originally asked for, what has changed since, any commitment already made to them (by either side), and the one open question you need an answer to on this call. Keep the whole summary to under 150 words so it is actually readable before the call starts.