diff --git a/src/plugin-sdk/index.ts b/src/plugin-sdk/index.ts
index c0c201ff0..282e963ec 100644
--- a/src/plugin-sdk/index.ts
+++ b/src/plugin-sdk/index.ts
@@ -369,3 +369,6 @@ export type { ProcessedLineMessage } from "../line/markdown-to-line.js";
 
 // Media utilities
 export { loadWebMedia, type WebMediaResult } from "../web/media.js";
+
+// Chat sanitization utilities
+export { stripEnvelope } from "../gateway/chat-sanitize.js";