I was nodding along through the first half or so, enjoying the declared intent and the theming, side eyeing the mechanics for a few minutes but eventually coming around. Then I got to the situation / scenario design section and realized:
This is a practical work of genius.
I don't believe one could better present better advice on how to prep a session. My own paranormal heartbreaker TTRPG, with over a decade of slow tinkering, is essentially an excuse to codify and streamline scenario prep, and I do believe you've put me to shame here.
Very well done. Great stuff. J Alexander should hire you to go on the Con circuit with him to explain his ideas, you've captured the Three Clue Rule magnificently.