[BUG] Stash lost when running /add-dir

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?

When I stash a prompt (Ctrl+S) to run a command (such as /output-style or /usage), I expect this prompt to come back after the command finishes. When I run /add-dir <path>, the stash does not come back, meaning I lost an important/long prompt. Instead, the same /add-dir command stays on my input.

This does NOT happen if you run /add-dir without any arguments. I think this happens because of the confirmation prompt that only shows when calling add-dir with the path in a single line

What Should Happen?

Claude Code should unstash my stashed prompt instead of displaying the /add-dir I just ran.

Error Messages/Logs

Steps to Reproduce

1. Write a prompt and press Ctrl+S. Stashed (auto-restores after submit) displays
2. Write /add-dir <path> and press Enter
3. Press any option in the confirmation prompt
4. Prompt stays as /add-dir <path>, pressing Ctrl+S to unstash the prompt on step 1 instead stashes the /add-dir command

In the screen recording I show that unstashing works when running other slash commands (/usage) and when calling /add-dir (and choosing folder-2 interactively), but not when running /add-dir ../folder-3

https://github.com/user-attachments/assets/a1fd2935-13e6-4625-8366-d162c4f068af

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.15 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_