/research can't write it's research report

[Lythenas]

Describe the bug

After running /research TOPIC the agent failed to write the research report to a file and instead complained that the "create" tool is not available.

Last response is:

I completed the research, but I could not save the markdown file to 
/home/developer/.copilot/session-state/9ea25370-4826-4fbe-9574-0fe0fbe00d77/research/using-github-copilot-cli-with-worktrees.md because the required create tool is not
available in this session, and the delegated research agent only had read-only tools.

This was the first time I've tried /research, but everything else looked fine. After the above message it gave me a brief summary and when I asked it to print the report instead of writing to a file, it also printed what looked like the full report. Of course I can't verify if that is the same content as it would have written to the file or if some context etc. was lost.

Affected version

GitHub Copilot CLI 1.0.40.

Steps to reproduce the behavior

1. Run /research some topic
2. Wait for it to finish
3. The agent should complain that it can't create the research report

Expected behavior

The agent should write the research report to a file.

Additional context

No response