diff --git a/src/core/permission_sync.rs b/src/core/permission_sync.rs
index 6cc4394..31c12f6 100644
--- a/src/core/permission_sync.rs
+++ b/src/core/permission_sync.rs
@@ -1,4 +1,3 @@
-use crate::domain::events::server::ServerCreatedEvent;
 use crate::repositories::Repositories;
 use event_bus::EventBus;
 use std::sync::Arc;
@@ -28,6 +27,27 @@ use uuid::Uuid;
 //
 // channel_created
 // channel_deleted
+// [Requête HTTP Admin]
+//        │
+//        ▼
+// 1. Repositories (Ecriture BDD)
+//        │
+//        ▼ (Emit Event ex: server_role_permission_updated)
+// 2. EventBus
+//        │
+//        ├────────────────────────────────────────┐
+//        ▼                                        ▼
+// 3. PermissionSyncService (Async Task)     [Réponse HTTP 200/204]
+//        │
+//        ├─► Recalcule computed_permission (full_sync_user)
+//        │
+//        └─► Emit Event "user_permissions_updated"
+//                │
+//                ▼
+//          4. Gateway WebSocket
+//                │
+//                ▼ (Push WS)
+//          5. Client Frontend (Vue 3 / Pinia)
 
 #[derive(Debug, Clone)]
 pub struct PermissionSyncService {
@@ -43,23 +63,162 @@ impl PermissionSyncService {
         }
     }
 
+    /// Enregistre les listeners sur l'EventBus pour mettre à jour le cache
+    /// des permissions calculées lors des modifications de structure ou de droits.
     pub async fn start_listen_event(&self) {
-        // todo : compléter la liste de permission avec le déclenchement des évènements
+        // ---------------------------------------------------------------------
+        // Événements Serveur & Membres Serveur
+        // ---------------------------------------------------------------------
+
         self.event_bus.on_async_with(
             "server_created",
             self.repositories.clone(),
-            move |repositories, payload: ServerCreatedEvent| {
-                Self::sync_server_permissions(repositories, payload.server.id)
+            move |repositories, server_id: Uuid| async move {
+                Self::sync_server(repositories, server_id).await;
+            },
+        );
+
+        self.event_bus.on_async_with(
+            "server_user_created",
+            self.repositories.clone(),
+            move |repositories, (server_id, user_id): (Uuid, Uuid)| async move {
+                Self::sync_user(repositories, user_id, server_id).await;
+            },
+        );
+
+        self.event_bus.on_async_with(
+            "server_user_deleted",
+            self.repositories.clone(),
+            move |repositories, (server_id, user_id): (Uuid, Uuid)| async move {
+                Self::sync_user(repositories, user_id, server_id).await;
+            },
+        );
+
+        // ---------------------------------------------------------------------
+        // Événements Rôles & Membres de Rôle
+        // ---------------------------------------------------------------------
+
+        self.event_bus.on_async_with(
+            "role_user_created",
+            self.repositories.clone(),
+            move |repositories, (_role_id, user_id, server_id): (Uuid, Uuid, Uuid)| async move {
+                Self::sync_user(repositories, user_id, server_id).await;
+            },
+        );
+
+        self.event_bus.on_async_with(
+            "role_user_deleted",
+            self.repositories.clone(),
+            move |repositories, (_role_id, user_id, server_id): (Uuid, Uuid, Uuid)| async move {
+                Self::sync_user(repositories, user_id, server_id).await;
+            },
+        );
+
+        // ---------------------------------------------------------------------
+        // Overrides de Permissions Serveur
+        // ---------------------------------------------------------------------
+
+        self.event_bus.on_async_with(
+            "server_role_permission_updated",
+            self.repositories.clone(),
+            move |repositories, (role_id, server_id): (Uuid, Uuid)| async move {
+                Self::sync_role_members(repositories, role_id, server_id).await;
+            },
+        );
+
+        self.event_bus.on_async_with(
+            "server_user_permission_updated",
+            self.repositories.clone(),
+            move |repositories, (server_id, user_id): (Uuid, Uuid)| async move {
+                Self::sync_user(repositories, user_id, server_id).await;
+            },
+        );
+
+        // ---------------------------------------------------------------------
+        // Événements Canaux & Overrides de Permissions Canaux
+        // ---------------------------------------------------------------------
+
+        self.event_bus.on_async_with(
+            "channel_created",
+            self.repositories.clone(),
+            move |repositories, server_id: Uuid| async move {
+                Self::sync_server(repositories, server_id).await;
+            },
+        );
+
+        self.event_bus.on_async_with(
+            "channel_deleted",
+            self.repositories.clone(),
+            move |repositories, server_id: Uuid| async move {
+                Self::sync_server(repositories, server_id).await;
+            },
+        );
+
+        self.event_bus.on_async_with(
+            "channel_role_permission_updated",
+            self.repositories.clone(),
+            move |repositories, (role_id, server_id): (Uuid, Uuid)| async move {
+                Self::sync_role_members(repositories, role_id, server_id).await;
+            },
+        );
+
+        self.event_bus.on_async_with(
+            "channel_user_permission_updated",
+            self.repositories.clone(),
+            move |repositories, (server_id, user_id): (Uuid, Uuid)| async move {
+                Self::sync_user(repositories, user_id, server_id).await;
             },
         );
     }
 
-    async fn sync_server_permissions(repositories: Arc<Repositories>, server_id: Uuid) {
-        let _ = repositories
+    // -------------------------------------------------------------------------
+    // Méthodes d'exécution Asynchrones
+    // -------------------------------------------------------------------------
+
+    /// Recalcule le cache pour un utilisateur sur un serveur donné.
+    async fn sync_user(repositories: Arc<Repositories>, user_id: Uuid, server_id: Uuid) {
+        if let Err(err) = repositories
             .computed_permission
-            .full_sync_server(server_id)
-            .await;
+            .full_sync_user(user_id, server_id)
+            .await
+        {
+            tracing::error!(
+                "Erreur lors de la synchronisation des permissions pour l'utilisateur {} sur le serveur {}: {:?}",
+                user_id,
+                server_id,
+                err
+            );
+        }
     }
 
-    async fn sync_server_permissions_by_user() {}
+    /// Recalcule le cache pour tous les membres d'un rôle.
+    async fn sync_role_members(repositories: Arc<Repositories>, role_id: Uuid, server_id: Uuid) {
+        if let Err(err) = repositories
+            .computed_permission
+            .sync_role_members(role_id, server_id)
+            .await
+        {
+            tracing::error!(
+                "Erreur lors de la synchronisation des membres du rôle {} sur le serveur {}: {:?}",
+                role_id,
+                server_id,
+                err
+            );
+        }
+    }
+
+    /// Recalcule le cache pour TOUS les utilisateurs d'un serveur.
+    async fn sync_server(repositories: Arc<Repositories>, server_id: Uuid) {
+        if let Err(err) = repositories
+            .computed_permission
+            .full_sync_server(server_id)
+            .await
+        {
+            tracing::error!(
+                "Erreur lors de la synchronisation complète du serveur {}: {:?}",
+                server_id,
+                err
+            );
+        }
+    }
 }