diff --git a/config/control-ui-startup-budget-baseline.json b/config/control-ui-startup-budget-baseline.json
index 29abbc45fd42..d6a8ca56660d 100644
--- a/config/control-ui-startup-budget-baseline.json
+++ b/config/control-ui-startup-budget-baseline.json
@@ -1,5 +1,5 @@
 {
-  "startupJsGzipBytes": 328285,
-  "reason": "Gateway update outcome (#121686); Testbox-measured exact-head bytes",
-  "updatedAt": "2026-08-11"
+  "startupJsGzipBytes": 329483,
+  "reason": "cumulative chat/session UI growth (#122296, #122713, #122870, #122876); CI-measured build-artifacts bytes",
+  "updatedAt": "2026-08-13"
 }