fix(file-transfer): preserve UTF-16 pairs in bounded stderr tails

Pick-cat · Pick-cat · commit 0ac96fc2d96a · 2026-07-11T10:49:24.000+08:00
diff --git a/extensions/file-transfer/src/shared/node-invoke-policy.ts b/extensions/file-transfer/src/shared/node-invoke-policy.ts
@@ -6,6 +6,7 @@ import type {
   OpenClawPluginNodeInvokePolicyContext,
   OpenClawPluginNodeInvokePolicyResult,
 } from "openclaw/plugin-sdk/plugin-entry";
+import { sliceUtf16Safe } from "openclaw/plugin-sdk/text-utility-runtime";
 import { appendFileTransferAudit, type FileTransferAuditOp } from "./audit.js";
 import { consumeChildOutput } from "./child-output.js";
 import {
@@ -33,7 +34,7 @@ function asRecord(value: unknown): Record<string, unknown> {
 
 function appendBoundedTextTail(current: string, chunk: Buffer, maxChars: number): string {
   const next = current + chunk.toString();
-  return next.length > maxChars ? next.slice(-maxChars) : next;
+  return next.length > maxChars ? sliceUtf16Safe(next, -maxChars) : next;
 }
 
 function readPath(params: Record<string, unknown>): string {
diff --git a/extensions/file-transfer/src/tools/dir-fetch-tool.ts b/extensions/file-transfer/src/tools/dir-fetch-tool.ts
@@ -5,6 +5,7 @@ import fs from "node:fs/promises";
 import path from "node:path";
 import type { AnyAgentTool } from "openclaw/plugin-sdk/agent-harness-runtime";
 import { saveMediaBuffer } from "openclaw/plugin-sdk/media-store";
+import { sliceUtf16Safe } from "openclaw/plugin-sdk/text-utility-runtime";
 import { appendFileTransferAudit } from "../shared/audit.js";
 import { consumeChildOutput } from "../shared/child-output.js";
 import { IMAGE_MIME_INLINE_SET, mimeFromExtension } from "../shared/mime.js";
@@ -42,7 +43,7 @@ const DIR_FETCH_MAX_SINGLE_FILE_BYTES = 16 * 1024 * 1024;
 
 function appendBoundedTextTail(current: string, chunk: Buffer, maxChars: number): string {
   const next = current + chunk.toString();
-  return next.length > maxChars ? next.slice(-maxChars) : next;
+  return next.length > maxChars ? sliceUtf16Safe(next, -maxChars) : next;
 }
 
 async function listTarOutputLines<T>(input: {
