Just like “Who is hiring” thread, a “Looking for co-founder” thread every quarter or 6 months might be helpful to the community? That can help start the conversation which is the first step towards finding the right co-founder. You can also get a good idea about a person by looking at their submission/comment history on HN.
Someone posted one of these recently. I am looking for a cofounder and don’t find one but still found the thread interesting. I think it would be good for the community.
