Any Constructibility Tips for this Vented Cathedral Ceiling Detail?

This one's a builder forum post, not a finished news story, so there's not much here for planning your own upgrade. A homeowner posted a question in an online building-science forum asking for construction advice on a specific roof detail: a vented cathedral ceiling, which is a slanted ceiling (no attic above it) that has a gap built in above the insulation so outside air can flow from the eaves to the ridge, carrying away moisture.

The question focused on how to frame the rafters and add blocking (short pieces of framing that close off gaps) at the corners where the roof meets the exterior wall, so that air sealing there is easier to build correctly. The poster wondered whether shifting the rafter tails and blocking closer to the outside wall, with the blocking sitting straight up on top of the wall's top plate, would simplify the job. At the time this was captured, no other builders or experts had replied yet.

For a homeowner, the takeaway is narrow: this is a technical framing detail relevant mainly if you are building a new roof or major addition with a cathedral ceiling, and it deals with how well the roof assembly can be sealed against air leaks and moisture during construction. It does not involve a program, rebate, deadline, or product announcement, so there is nothing to act on for an existing home.