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I almost put this in the experimental category, but I'm fairly confident it works well enough to use, though I recommend you only use it on iOS 17.
The way it works is basically whenever you get an email, it adds it to Data's prompt, and then that way Data has awareness of what that email contains, it has it just in its recent memory so it can talk to you about it.
Of course, this only works if you have auto-run without confirming turned on, which you can only do in iOS 17. iOS 17 comes out for everyone on September 12th, so if you're excited about this feature, just wait until then.
This shortcut serves two purposes:
This shortcut runs a DATA query against your email.txt file. If there is no input, it prompts you to say something and transcribes it, then runs your speech as the query. It is meant to be used mostly as a DATA command to check the contents of existing emails before drafting new ones.