Hi,
about... "To answer Bcall’s email, yes, Github comments ends up on the Jira,
but not the other way around. So people reading and commenting there see the
entire thread, whereas people only reading the Github PR only sees “half” the
thread." ... perhaps you can try to enable email notifications based upon
comment events and send them to a "service account", configure the email MTA
service (postfix,exim, ...) to route the email to an SMTP Apache Camel service
and let it to convert the email body (jira comment) into a github REST API call.