Probot currently functions really well for reacting to web hooks and taking some particular action, however there doesn't seem to be a concrete way of pushing data in the opposite direction (to probot and then to github, perhaps from some API route or something).
Use case
A user may have a probot instance setup for their organisation which may do things like PR / Issue template enforcement. They may also want to log unhandled exceptions as a github issue as soon as they are raised in the system. Right now it seems the easiest way to get this working is to ignore probot and create a new service for this. Installation ID's make it difficult to make use of the GitHub Apps for small use cases (rather than market place based products), if probot could provide some pattern for this then that would be excellent!
It would be great for probot to be an all encompassing github bot framework, rather than just a github webhook framework.