Maybe they've updated it in the last couple weeks and my comment is out of date - I hope so! Because the 5th option definitely wasn't there when I recently used it, and the 4th you're mentioning looks familiar but I'm pretty sure in that case to it didn't (used to?) write it to a file.
4. Tell claude what to do instead, which will update the plan base on what you say.
5. Add comments to the plan directly - similar to 4 - but you can comment on specific parts.
Note: I use the VSCode extension, not sure if it differs in terminal mode.