Tool behavior issues when processing EUC-KR files and saving in Korean

Support Bug Reports
1

Where does the bug appear (feature/product)?

BugBot

Describe the Bug

The cursor’s document encoding is EUC-KR, but when the AI ​​Agent requests it, it is written in UTF-8, causing all Korean characters to be corrupted.

Reported via email, but no fix was found.

Steps to Reproduce

If you are asked to input ‘가나다라마바사’ in EUC-KR encoding, it is encoded in UTF-8 and cannot be recognized.

Expected Behavior

Even though the encoding in the cursor and vscode options is set to EUC-KR, it doesn’t seem to be recognized.

Requesting a modification to a specified section using the Ctrl+K hotkey correctly modifies the document.

Operating System

Windows 10/11

Version Information

Version: 2.5.20 (system setup)
VSCode Version: 1.105.1
Commit: 511523af765daeb1fa69500ab0df5b6524424610
Date: 2026-02-19T20:41:31.942Z
Build Type: Stable
Release Track: Default
Electron: 39.4.0
Chromium: 142.0.7444.265
Node.js: 22.22.0
V8: 14.2.231.22-electron.0
OS: Windows_NT x64 10.0.26200

For AI issues: which model did you use?

Agent status.

Additional Information

I’m using Cursor Pro, but this feature is currently preventing me from using it properly.

I feel like I’ve wasted my money.

Does this stop you from using Cursor

Yes - Cursor is unusable

3

Hey, thanks for the report. This is a known issue. Agent ignores the file’s original encoding and saves everything as UTF-8, which breaks non-UTF-8 characters, in your case EUC-KR.

Related threads:

A fix shipped in 2.5, but we’re still hearing that it may not be fully resolved. I’ve passed this to the team, your report helps us prioritize it.

Workarounds:

  1. Use Ctrl+K (inline edit) instead of Agent when editing EUC-KR files. You’ve already noticed this works correctly.
  2. If you do use Agent, after editing click the encoding in the bottom-right of the editor, then choose “Reopen with Encoding” → EUC-KR, then “Save with Encoding” → EUC-KR. Note: this may not fully recover the file if Agent already corrupted characters on its side.
4

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