diff --git a/src/plugin-sdk/runtime-api-guardrails.test.ts b/src/plugin-sdk/runtime-api-guardrails.test.ts
index b40f819336b..5c144ca8f34 100644
--- a/src/plugin-sdk/runtime-api-guardrails.test.ts
+++ b/src/plugin-sdk/runtime-api-guardrails.test.ts
@@ -49,6 +49,7 @@ const RUNTIME_API_EXPORT_GUARDS: Record<string, readonly string[]> = {
     'export { writeJsonFileAtomically } from "openclaw/plugin-sdk/json-store";',
     'export type { ChannelDirectoryEntry, ChannelMessageActionContext, OpenClawConfig, PluginRuntime, RuntimeLogger, RuntimeEnv, WizardPrompter } from "openclaw/plugin-sdk/matrix";',
     'export { formatZonedTimestamp } from "openclaw/plugin-sdk/matrix";',
+    'export { chunkTextForOutbound } from "openclaw/plugin-sdk/matrix";',
   ],
   "extensions/nextcloud-talk/runtime-api.ts": [
     'export * from "openclaw/plugin-sdk/nextcloud-talk";',