Does that mean when I'm in deep thinking without any external "information inflow" I'm not "in flow state"?
I'd agree that waiting for replies kind of pulls you out of flow if you just sit and wait, but I'm not sure why you'd do that. You can continue working along-side, validate, or continue iterating on the design while the agent does other things.
It's the opposite of watching YouTube, pretty much.
Attention is on the full body, and the field of perception, then field of awareness, all at the same time.
A bit like shavasana practice, but instead of scanning part by part, expand presence to everything.
The thinking analytical mind stops, the nonthinking mind activates and softly intensifies.
Michael Taft has many different guided approaches to this on his channel but there are many other teachers as well, e.g. Adyashanti, Angelo Dillulo, Loch Kelly, Shinzen Young (specifically his Do Nothing and Auto Focus techniques) and expanding the gamut to traditional Vajrayana teachers, Lama Lena, Mingyur Rinpoche, Lama Dawai Gocha, all with accessible online teachings. Also Sayadaw U Tejaniya and Christopher Wallis who are less conventional, so to speak.