2 remarks:

• mapping your class to pseudo_namespace %ALL makes it available to all other namespaces except %SYS
• to keep your options for a bitmap valid you may take the approach shown in my article of the Adopted Bitmap    The default of a storage global is ^Pck.ClassnameD .. and so on. But it can also be  ^Pck.ClassnameD(%InterfaceName,$namespace)  and the integer ID follows as you need. You just have to take care that %InterfaceName has some useful content.  Which shouldn't be a problem. I used %name to bypass all issues with ProcedureBlock.  

OK: version is updated now.
<Description> . . . is in moduel .xml
But not visible with zpm "search -d -r" .
e.g. https://github.com/rcemper/fast-JSON-formatting-IRIS-ZPM
  https://openexchange.intersystems.com/package/fast-JSON-formatting-in-IRIS?tab=history

and my other 35+ packages

explicitly PUSHING "publish release" doesn't show any reaction.
and no change for zmp "search -d -r"
What's the delay to be expected?

There is a trick that may work for some pieces but requires very careful setup:
- create a new database that can be part of the MIRROR
- then you can map the components that are INDEPENDENT of the local instance to this DB

Be warned:
Identification and Isolation of these pieces can be quite tricky and sometimes also impossible
In addition, this can make troubleshooting and maintenance (release update?) rather complicated
and you should do an in-depth evaluation if the extra effort values the achieved result.  

Thanks for the inspiration for this article
Using ClassQueries() as Tables
 

BINGO !  you got the idea behind 

It is not meant to replace one of the queries:
do #1 or #2 or do both by UNION  

maybe a misunderstanding:
I call both Class Queries as Tables and join them with UNION
without modifying the existing class queries

DisplayToLogical converts external input to internal format.
if you have an object everything is internal already.
what would you expect to convert?

DisplayToLogical is just not involved in that process.
You may eventually look for LogicalToStorage  -  [a rare case]

I'm full with you.
And if you aren't under time pressure you get a close look at things that have become obsolete over time but never were removed.

That's good news! and a real surprise! 
I appreciate it highly

 

I'm not sure what the first 2 bytes are but $ZCVT(anystring,"O","UTF8") should do the conversion
and this works for strings up to ~3,6 MB with Long-String enabled in your installation

for $ZCVT: https://docs.intersystems.com/iris20201/csp/docbook/DocBook.UI.Page.cls?KEY=RCOS_fzconvert

in OEX there is a series of various  Websocket Clients I produced:
The internal is just available in IRIS.
Half Externals (eg. CSP based, using JavaScript )  might fit also for Caché 2015 as for IRIS
check WebSocketClient CSP based

 

You mention: web application configuration information, task plans, sql gateway, etc
Namespace %SYS was always excluded from MIRROR  since most of the information is
either static (SYSLIB)  or server-specific (eg. journal)
 

@Alexey Maslov
I had a similar experience with "InPlace".
This may work if your applications are as simple as in SAMPLES:
[ "nome est omen" SAMPLES => Simple]
Just a few $ZU() or other %z* stuff may break you, or file references containing *CACHE*.
Or some $ZF() functions with c-binding, ....
Therefore I designed my "2 worlds" approach using ECP as a data bridge: 
Using ECP across IRIS and Caché

Ah much better! 

confirmed! same result with me