feat(F-057): completed feature

work/runtime-status.json

@@ -1,20 +1,13 @@
 {
-  "feature_id": "F-056",
-  "stage": "close",
-  "agent": "leader",
-  "action": "close",
-  "state": "done",
+  "feature_id": "F-057",
+  "stage": "build",
+  "agent": "implementer",
+  "action": "fix checkout 400 missing items",
+  "state": "running",
   "next_agent": "reviewer",
   "waiting_for": null,
-  "updated_at": "2026-08-19T13:10:09Z",
+  "updated_at": "2026-08-19T13:10:17Z",
   "timeline": [
-    {
-      "ts": "2026-08-19T08:47:06Z",
-      "agent": "documenter",
-      "stage": "document",
-      "state": "running",
-      "message": "Inicio document"
-    },
     {
       "ts": "2026-08-19T08:47:19Z",
       "agent": "leader",
@@ -147,6 +140,13 @@
       "stage": "close",
       "state": "done",
       "message": "close"
+    },
+    {
+      "ts": "2026-08-19T13:10:17Z",
+      "agent": "implementer",
+      "stage": "build",
+      "state": "running",
+      "message": "fix checkout 400 missing items"
     }
   ],
   "last_updated": "2026-08-19T09:10:00Z",