I actually think that the harnesses which do end up building products, the harness will be the product.
As an example, I have a harness which I have my entire team use consistently. The harness is designed for one thing: to get the results I get with less nuanced understanding of why I get it.
Mind you, most of my team members are non-technical, or at least would be considered non-technical, two years ago.
These days, I spend most of my time fine-tuning the harness. What that gives me is a team which is producing at 5x their capacity from three months ago, and I get easier to review, more robust pull requests that I have more confidence in merging.
It's still a far cry from automating the entire process. I still think humans need to give the outcomes to even the harnesses to produce the results.
I think your take is right. This isn't going to help with the internalization of knowledge that note taking will get you. I do think that there is some value in the way we've set up blueprints of agents if you haven't set up a business before to either teach about role functions in a business or get a head start on business that doesn't create something new. At the very least it's a quick setup to getting to experiment.
To the part about note taking (and disclosure) - we are working on a context graph product that lessens the work of reading sources, especially over time and breath to help with a lot of the structure you've mentioned.
Say more?