This is neat, but the permissions are crazy broad:

    This application will be able to read and write all
    public repository data. This includes the following:
    
    * Code
    * Issues
    * Pull requests
    * Wikis
    * Settings
    * Webhooks and services
    * Deploy keys

I'm not comfortable giving this app access to all of my public repositories just to leave a comment on a website.

I don't know if that's a limitation of Github's permissions API - maybe it's not fine-grained enough to give utterances access to a single repo's issues only - but it's a hard blocker.