fix(qa-matrix): use truncateUtf16Safe for message body/caption previews

Pandah97 · Pandah97 · commit 109f0370427a · 2026-07-09T19:22:28.000+08:00
Replace .slice(0, 200) with truncateUtf16Safe() on MATRIX message body
and caption fields in attachment detail lines and scenario artifacts
to prevent UTF-16 surrogate pair corruption.
diff --git a/extensions/qa-matrix/src/runners/contract/scenario-runtime-media.ts b/extensions/qa-matrix/src/runners/contract/scenario-runtime-media.ts
@@ -1,3 +1,4 @@
+import { truncateUtf16Safe } from "openclaw/plugin-sdk/text-utility-runtime";
 // Qa Matrix plugin module implements scenario runtime media behavior.
 import type { MatrixQaObservedEvent } from "../../substrate/events.js";
 import { MATRIX_QA_MEDIA_ROOM_KEY, resolveMatrixQaScenarioRoomId } from "./scenario-catalog.js";
@@ -43,7 +44,7 @@ function buildMatrixQaAttachmentDetailLines(params: {
     `${params.label} msgtype: ${params.attachmentEvent.msgtype ?? "<none>"}`,
     `${params.label} attachment kind: ${params.attachmentEvent.attachment?.kind ?? "<none>"}`,
     `${params.label} attachment filename: ${params.attachmentEvent.attachment?.filename ?? "<none>"}`,
-    `${params.label} body preview: ${params.attachmentEvent.body?.slice(0, 200) ?? "<none>"}`,
+    `${params.label} body preview: ${params.attachmentEvent.body ? truncateUtf16Safe(params.attachmentEvent.body, 200) : "<none>"}`,
   ];
 }
 
@@ -124,7 +125,9 @@ export async function runImageUnderstandingAttachmentScenario(context: MatrixQaS
   const reply = buildMatrixReplyArtifact(matched.event);
   return {
     artifacts: {
-      attachmentCaptionPreview: attachmentEvent.event.attachment?.caption?.slice(0, 200),
+      attachmentCaptionPreview: attachmentEvent.event.attachment?.caption
+        ? truncateUtf16Safe(attachmentEvent.event.attachment.caption, 200)
+        : undefined,
       attachmentFilename: MATRIX_QA_IMAGE_ATTACHMENT_FILENAME,
       driverEventId,
       reply,
@@ -441,7 +444,9 @@ export async function runGeneratedImageDeliveryScenario(context: MatrixQaScenari
   );
   return {
     artifacts: {
-      attachmentBodyPreview: matchedEvent.body?.slice(0, 200),
+      attachmentBodyPreview: matchedEvent.body
+        ? truncateUtf16Safe(matchedEvent.body, 200)
+        : undefined,
       attachmentEventId: matchedEvent.eventId,
       attachmentFilename: attachment.filename,
       attachmentKind: attachment.kind,
