A developer is about to start a large CLI change and wants to review an implementation approach before code is written. Which Copilot CLI capability best supports this?

1. Use plan mode to work through the scope and proposed steps before implementation.
2. Use a version-information command to generate an implementation plan.
3. Rely on a final diff as a substitute for reviewing an approach before editing.
4. Enable unrestricted tool approval and wait until every edit is finished.