If you try to compile a method with an empty category, you get a walkback. My preference would be that Rowan just puts it in a default category but I'm open to other ideas. The walkback is a pretty harsh failure if the method to compile is otherwise ok.
2025-07-10_53858451_rowanServerStackDump.txt
The "offending" code is here:
RwPrjBrowserToolV2>>addOrUpdateMethod:inProtocol:forClassNamed:isMeta:
<....>
| methodDef loadedProject loadedPackage couldBeHybrid hybridLoadedPackage hybridLoadedProject loadedClass |
couldBeHybrid := (hybridPackageName at: 1) = $*.
<....>