Thank you for the answer, appreciate it, and your effort that goes into arcanist.

The non-public parts of Phage are currently very specific to Phacility's cluster and probably not generally useful. The current version of PhageRemoteWorkflow is similar to P2107 and depends on particular Phacility services and hosts to enumerate valid remotes and negotiate a connection to them through a bastion pool. These service-listing and bastion-host components are not generalized and not trivially generalizable.

It seem to me like certain parts of phage are not published in a public repo. Are there plans to open up missing pieces?

I've been doing production deployments with this for a while without hitting any meaningful issues. It's not general-purpose yet but followups can live in Phage from here on out.