[Bug] Chat no longer can change the source code for me

Environment

• OS: Windows
• Eclipse Version: 2026-06 M2 (4.40.0 M2)
  Build id: 20260430-0613
• Plugin Version: 0.17.0.20260513010

Describe the bug
The chat does not have the ability to write content to the editor

To Reproduce
Steps to reproduce the behavior:

1. Go to chat window with some code selected in editor
2. Enter instructions to edit the code
3. Chat returns instructions on what changes to make
4. Ask why it didnt edit the file, and it replies: "File editing tools are not currently enabled in this session. You can enable them in your editor settings, or I can print a code block with the changes you want made so you can apply them manually.

Expected behavior
It should have adjusted the source file
I also do not see a clear switch in preferences that would affect this?

Additional context
I used to have this ability for the chat to make changes to the source, until I updated a few days back.

Start in the Eclipse chat window and editor integration, reproducing the issue with source selected and comparing the current plugin behavior with the previously working version. Check the editor preferences for file-editing tool enablement; done means chat instructions modify the selected source file as expected and the relevant setting or regression is identified.