Thanks for the handbook link. For your second point (on UX flows), what stage in product iterations do you think those decisions should be made? I feel those

Thanks for the handbook link. For your second point (on UX flows), what stage in product iterations do you think those decisions should be made? I feel those decision belong more to product management and designers, and after they are finalized, designers need to communicate them properly e.g. via design reviews of new artifacts with developers before start of development, and/or document screen flows properly. In either case, to my original question, the interaction is not really "pairing" with developers. Agree? Disagree?