feat(F-054): completed feature

work/artifacts/F-054/security.json

@@ -0,0 +1,30 @@
+{
+  "feature_id": "F-054",
+  "stage": "security_gate",
+  "agent": "security",
+  "ts": "2026-08-19T09:12:30Z",
+  "verdict": "APPROVED",
+  "checks": [
+    {
+      "name": "no_credentials_in_code",
+      "status": "PASS",
+      "detail": "No hay credenciales hardcodeadas en los cambios"
+    },
+    {
+      "name": "watchdog_process_isolation",
+      "status": "PASS",
+      "detail": "Watchdog es proceso de solo supervisión; no ejecuta código de negocio"
+    },
+    {
+      "name": "heartbeat_no_side_effects",
+      "status": "PASS",
+      "detail": "Heartbeat solo lee memoria y loguea; no modifica estado"
+    },
+    {
+      "name": "launchd_runs_as_user",
+      "status": "PASS",
+      "detail": "LaunchAgent corre como usuario normal (chattie), no como root"
+    }
+  ],
+  "notes": "Sin superficie de ataque nueva. Watchdog solo re-spawnea procesos."
+}