Dashed amber lines = cross-team dependencies. Minimize these to maximize team autonomy.
GET /users/me/updates is a polling aggregator serving two concerns: notification badges (totalUnreadMessages, unviewedInvites → Messaging) and the sitter analytics tab (sentInvites, favoriteCount, profileViewCount, recommendationsCount → Matching). Consider splitting into two endpoints owned by separate teams.
UserWarning service is owned by the Users team but called by Messages, Payments and Admin. Candidate for promotion to Moderation or Shared.
Tracking service is owned by Payments but also called by Users (PATCH /users/me) and Messaging (PushNotification). Consider moving to Shared or treating it as an event bus.
Admin (GEM) team has no services of its own — it is a consumer of every other team's services. All GEM routes should coordinate API changes with the owning teams.