diff --git a/src/agents/context-runtime-state.ts b/src/agents/context-runtime-state.ts
index 09b9669763d7..49e6f6c8f51c 100644
--- a/src/agents/context-runtime-state.ts
+++ b/src/agents/context-runtime-state.ts
@@ -73,7 +73,7 @@ export function beginContextWindowCacheRefresh(): void {
 }
 
 /** Reset prepared context-window state after model config or plugin metadata changes. */
-export function resetContextWindowCache(): void {
+function resetContextWindowCache(): void {
   beginContextWindowCacheRefresh();
   CONTEXT_WINDOW_RUNTIME_STATE.modelsConfigRuntimeLoader.clear();
   MODEL_CONFIGURED_CONTEXT_TOKEN_CACHE.clear();