https://search.brave.com/help/goggles
The most intuitive way to integrate it is to use the lens, by incorporating results from goggles like tech blogs to the programming lens.
Another idea: because you can give scores to each rule, it would be interesting to see Kagi using our list of site preferences, create a goggle with it and query Brave, and finally mix the results to our normal results. This would need an evaluation of how many new results appear, but I think it's going to be something meaningful.