[BUG] [VSCODE] Fails to re-open plan when opening a previous session after a restart (or have any way to re-open the plan manually)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Related to https://github.com/anthropics/claude-code/issues/33369

When I open a previous session after reloading VS Code, if the agent stopped at the asking about a plan, the plan isn't re-shown, can't even click on the "Claude Plan" entry in the chat

What Should Happen?

Re-show the plan

Error Messages/Logs

Steps to Reproduce

1. Start a planning session and wait for the plan to show up/wait for user
2. Restart VS Code
3. Re-open the session and observe that there is no plan opened, nor can you click on the Claude Plan item in the chat

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.101 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

Using the Claude Code extension under WSL via VS Code WSL extensions