Post-upgrade to Claude Sonnet 4.0, Claude sometimes inserts unwanted quotes into the Explain with AI feature

For example:

<img width="933" alt="Image" src="https://github.com/user-attachments/assets/9d054499-6ccf-4115-b59a-6cda285fc0c8" />

The quote here is not intended. We should add more guardrails into the initial prompt.