diff --git a/app/domain/device/device.ts b/app/domain/device/device.ts
index a7b32c3..3768830 100644
--- a/app/domain/device/device.ts
+++ b/app/domain/device/device.ts
@@ -128,17 +128,20 @@ export class Device {
 
   /**
    * Returns true if GPN is allowed based on circuit breaker state.
-   * Closed = always allowed. Half-open = allowed if cooldown expired. Open = not allowed.
+   * Closed = always allowed. Half-open = allowed (cooldown expired probe).
+   * Open → transitions to half-open when cooldown expires (clears cooldownUntil).
+   *
+   * NOTE: the open→half-open transition mutates state but does NOT persist to DB.
+   * The caller (IdleState) is responsible for persisting if needed.
    */
   public isGpnAllowed(): boolean {
-    const { state, cooldownUntil } = this._gpnCircuitBreaker
-    if (state === 'closed') return true
-    if (state === 'half-open') {
-      return cooldownUntil === null || new Date() >= cooldownUntil
-    }
+    const cb = this._gpnCircuitBreaker
+    if (cb.state === 'closed') return true
+    if (cb.state === 'half-open') return true
     // state === 'open': check if cooldown expired → transition to half-open
-    if (cooldownUntil && new Date() >= cooldownUntil) {
-      this._gpnCircuitBreaker.state = 'half-open'
+    if (cb.cooldownUntil && new Date() >= cb.cooldownUntil) {
+      cb.state = 'half-open'
+      cb.cooldownUntil = null // clear stale cooldown so snapshot is clean
       return true
     }
     return false
diff --git a/start/routes.ts b/start/routes.ts
index 2cf6c15..8e04f8c 100644
--- a/start/routes.ts
+++ b/start/routes.ts
@@ -97,6 +97,13 @@ router
     router.post('/devices/:identifier/command', [DevicesController, 'executeCommand'])
     router.post('/devices/:identifier/refresh', [DevicesController, 'refresh'])
 
+    // References
+    const ReferencesController = () => import('#controllers/references_controller')
+    router.get('/devices/:identifier/references', [ReferencesController, 'index'])
+    router.get('/devices/:identifier/references/:provider', [ReferencesController, 'show'])
+    router.post('/devices/:identifier/references/resolve', [ReferencesController, 'resolveAll'])
+    router.post('/devices/:identifier/references/resolve/:provider', [ReferencesController, 'resolveOne'])
+
     // Commands
     router.get('/commands', [CommandsController, 'index'])
     router.get('/commands/:id', [CommandsController, 'show'])