Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
One thing that is not clear to me is how the rollups know that a given message in the inbox is for them and not for another rollup. It seems that the messages have no target address?
Source of discussion Twitter
Indeed, the external messages of the inbox have to be parsed by the rollup for the rollup logic to decide to process it or not. No format is enforced by the shared inbox to keep this communication channel as flexible as possible for rollup devs.
Required, but never shown