[BUG] Claude Code VS Code extension truncates HTML files on save (LF→CRLF rewrite chops trailing scripts)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Claude Code for VS Code extension (latest, installed 2026-05-27) silently truncated several large HTML files in my project when saving. Trailing <script> blocks, </body>, and </html> tags were cut off. Line endings flipped from LF to CRLF on the same files.

What Should Happen?

Disabling Claude Code stopped the issue. Files were ~700-900 lines, contained inline <style> and <script type="module"> blocks. Windows 11, VS Code latest, only other extension was Live Server.

Error Messages/Logs

Steps to Reproduce

Disabling Claude Code stopped the issue. Files were ~700-900 lines, contained inline <style> and <script type="module"> blocks. Windows 11, VS Code latest, only other extension was Live Server.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

5-2026

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_