diff --git a/extensions/qqbot/src/utils/text-parsing.ts b/extensions/qqbot/src/utils/text-parsing.ts
index 67cc9259f63..5cec13dda9a 100644
--- a/extensions/qqbot/src/utils/text-parsing.ts
+++ b/extensions/qqbot/src/utils/text-parsing.ts
@@ -1,41 +1,9 @@
+import { estimateBase64DecodedBytes } from "openclaw/plugin-sdk/media-runtime";
+import { normalizeLowercaseStringOrEmpty } from "openclaw/plugin-sdk/text-runtime";
 import type { RefAttachmentSummary } from "../ref-index-store.js";
 
 const MAX_FACE_EXT_BYTES = 64 * 1024;
 
-function estimateBase64DecodedBytes(base64: string): number {
-  let effectiveLen = 0;
-  for (let i = 0; i < base64.length; i += 1) {
-    if (base64.charCodeAt(i) > 0x20) {
-      effectiveLen += 1;
-    }
-  }
-  if (effectiveLen === 0) {
-    return 0;
-  }
-
-  let padding = 0;
-  let end = base64.length - 1;
-  while (end >= 0 && base64.charCodeAt(end) <= 0x20) {
-    end -= 1;
-  }
-  if (end >= 0 && base64[end] === "=") {
-    padding = 1;
-    end -= 1;
-    while (end >= 0 && base64.charCodeAt(end) <= 0x20) {
-      end -= 1;
-    }
-    if (end >= 0 && base64[end] === "=") {
-      padding = 2;
-    }
-  }
-
-  return Math.max(0, Math.floor((effectiveLen * 3) / 4) - padding);
-}
-
-function normalizeLowercaseStringOrEmpty(value: unknown): string {
-  return typeof value === "string" ? value.trim().toLowerCase() : "";
-}
-
 /** Replace QQ face tags with readable text labels. */
 export function parseFaceTags(text: string | undefined | null): string {
   if (!text) {