diff --git a/backend/src/main/java/org/raddatz/familienarchiv/audit/AuditLogQueryRepository.java b/backend/src/main/java/org/raddatz/familienarchiv/audit/AuditLogQueryRepository.java
index 59e930d3..8a559cb6 100644
--- a/backend/src/main/java/org/raddatz/familienarchiv/audit/AuditLogQueryRepository.java
+++ b/backend/src/main/java/org/raddatz/familienarchiv/audit/AuditLogQueryRepository.java
@@ -70,7 +70,8 @@ public interface AuditLogQueryRepository extends JpaRepository<AuditLog, UUID> {
                     CASE WHEN COUNT(*) > 1 THEN MAX(s.happened_at) ELSE NULL END  AS happened_at_until,
                     COUNT(*)::int                                                 AS count,
                     BOOL_OR(s.kind = 'MENTION_CREATED'
-                        AND s.payload->>'mentionedUserId' = :currentUserId)       AS you_mentioned
+                        AND s.payload->>'mentionedUserId' = :currentUserId)       AS you_mentioned,
+                    MIN(s.payload::text)::jsonb                                   AS payload
                 FROM sessions s
                 GROUP BY s.kind, s.actor_id, s.document_id, s.session_id
             )
@@ -89,6 +90,13 @@ public interface AuditLogQueryRepository extends JpaRepository<AuditLog, UUID> {
                 ag.document_id                                         AS documentId,
                 ag.happened_at                                         AS happened_at,
                 ag.you_mentioned                                       AS youMentioned,
+                -- payload->>'commentId' matches notifications.reference_id per AuditKind.COMMENT_ADDED contract
+                EXISTS(
+                    SELECT 1 FROM notifications n
+                    WHERE n.type = 'REPLY'
+                      AND n.recipient_id = CAST(:currentUserId AS uuid)
+                      AND n.reference_id = (ag.payload->>'commentId')::uuid
+                )                                                      AS youParticipated,
                 ag.count                                               AS count,
                 ag.happened_at_until                                   AS happenedAtUntil
             FROM aggregated ag