Add comments in extension

What variant of Codex are you using?

CLI, IDE Extension

What feature would you like to see?

<img width="970" height="711" alt="Image" src="https://github.com/user-attachments/assets/be0d1f28-cb58-429e-af32-84da3427a8f6" />

It would be great to have the ability to leave comments on diffs that would subsequently be processed by an agent. Ideally, there would be two settings: one to send comments immediately, and another to send them only after the entire implementation is complete. This feature is sorely missed, as it is often necessary to monitor the agent, and copying and pasting snippets of code is quite inconvenient.

Additional information

_No response_