@vige, I cannot see that your new thread you are linking to answers @Sthocs’ questions, even though you replied “Sure thing, will do!” and now replied to this post of yours that you “hope this helps”.
Hence answers to @Sthocs’ questions for proper guidance to Jolla’s sandboxing still would be helpful, e.g., if app names with the “harbour” prefix (e.g., harbour-myapp) are technically still feasible when an app has activated the sandboxing (that was rather implicitly asked).
P.S.: It also would be helpful to know if the workaround @nephros suggested is going to be technically prevented or not. Even though that sure is not what you intended, I might be helpful as a quick & dirty workaround for developers who publish their apps at Openrepos or chum and are slow to fully adapt to Jolla’s sandboxing rules.
Side note: For me the intentions for such a fine grained “organisation” directory structure is not fully obvious, especially as it is a 180° turn from the old rules (i.e., every app has to have harbour- prefixed if it is going to be submitted to the Jolla Store, which was definitely more awkward, but one became used to it over the years).