diff --git a/docs/unsure-where-to-put/adr-activities-are-only-triggered-by-human-interaction.md b/docs/unsure-where-to-put/adr-activities-are-only-triggered-by-human-interaction.md
index 4ade945a14..8f54d4835d 100644
--- a/docs/unsure-where-to-put/adr-activities-are-only-triggered-by-human-interaction.md
+++ b/docs/unsure-where-to-put/adr-activities-are-only-triggered-by-human-interaction.md
@@ -6,12 +6,48 @@ Proposal
 
 ## Context
 
-While implementing the trigger of federated 
+While implementing the trigger of federated stars we have to handle the distribution of corresponding Like-Activities to the federated repositories.
+
+This must be done consistently and without circularity, such that a repository starring by a user leads to exactly one added star in every federated repository.
 
 ## Decision
 
 
 ## Choices
 
+### 1. Star Activity Triggers Sending of Star Activity to Federated Repositories
+
+In this case the star federation process would look like:
+
+1. Repo on an instance receives a star (regardless of whether via UI or federation)
+2. Instance federates star to all repos that are set as federated repositories.
+
+#### Problem - Circularity And Inconsistency
+
+Circular federation would lead to a infinite circular distribution of Like-Activities:
+
+1. Given a repo on the 3 instances A, B, C.   
+   Repo on instance A has set repo on instance B as federation repo.   
+   Repo on instance B has set repo on instance C as federation repo.   
+   Repo on instance C has set repo on instance A as federation repo.   
+2. User stars repo on instance A via UI.
+3. Instance A sends Like-Activity to repo on instance B.
+4. Instance B creates local FederatedUser, stars the repo and sends Like-Activity to repo on instance C.
+5. Instance C creates local FederatedUser, stars the repo and sends Like-Activity to repo on instance A.
+6. Instance A creates local FederatedUser, since the Actor of the Like-Activity is the local FederatedUser created on instance C.   
+   Thus, the repo on instance A gets another star by this user and sends Like-Activity to the repo on instance C.
+7. The circular distribution of Like-Activities continues, since the actor is always the local FederatedUser of the sending instance.
+
+### 2. Only Repository-Starring By Authenticated User Triggers Sending of Star Activity to Federated Repositories
+
+In this case the star federation process would look like:
+
+1. Case: Repo on an instance receives a star by an authenticated user via UI/API:
+    1. Repository gets starred by the authenticated User.
+    2. Instance federates star to all repos that are set as federated repositories.
+2. Case: Repo on an instance receives a star via a Like-Activity:
+    1. Instance creates FederatedUser and stars the repository.
+    2. No further star federation to federated repos is triggered.
+
 ## See also