Invalid sub-module dependencies

[mschaeferjelli]

Hi, I'm trying to slowly clean up a poorly architected monolith. I started by identifying three basic modules of functionality and bucketing Services into those modules. I'm getting Invalid sub-module reference
I have "audience", "inventory" and "planner" and InventoryService within inventory that sends an event when inventory changes

So, "inventory" -> "audience" and "planner" -> "inventory","audience"
and "planner.healer"->"inventory.inventoryservice" -- this causes the invalid sub-module reference.

Is there an opinionated reason that this is invalid? I'd prefer to have general protection against "inventory"->"planner" which I don't think I can get without the outer modules. For example, "planservice" -> "inventoryservice" -> "planupdateservice" would pass architectural verification and would require a human to catch in a PR even though it's planner->inventory->planner