[BUG] Jetbrains plugin: Claude Code closes when you press Ctrl+Backslash

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?

In the Claude Code plugin for JetBrains Rider on Windows, pressing Ctrl+\ inside the terminal session that the plugin auto-launches closes the terminal tab and terminates the Claude Code session. This makes Ctrl+\ unusable as a Rider chord-prefix shortcut whenever the plugin-launched terminal has focus.

What Should Happen?

Ctrl+\ should have no effect on the Claude Code session — matching the behavior of a manually-launched claude running in a user-opened Rider terminal — so that Rider's own keymap can claim it for chord-prefix shortcuts.

Error Messages/Logs

Steps to Reproduce

1. On Windows, install the Claude Code plugin in JetBrains Rider.
2. In Settings → Keymap, bind Ctrl+\ as the first keystroke of any chord (e.g. Ctrl+\, Ctrl+V → View Mode).
3. Open the Claude Code plugin so it spawns its own terminal tab with a Claude Code session running.
4. With that tab focused, press Ctrl+\.
5. Observed: the tab closes and the Claude Code session is terminated.
6. Expected: no effect on the session; Rider waits for the second keystroke of the chord.

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.185 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

Ctrl+\ does not close the tab in any of these alternative configurations, which scopes the bug to the plugin's terminal launcher specifically:

• A manually-opened Rider PowerShell tab running claude directly — Ctrl+\ has no effect.
• Windows Terminal (PowerShell or Git Bash) running claude — Ctrl+\ has no effect.
• A plain Rider PowerShell or Git Bash tab with no Claude Code session — Ctrl+\ has no effect.

Rider's Keymap reports no action bound to Ctrl+\ aside from the chord shortcuts I have added.

Environment: Windows 11, JetBrains Rider 2026.1.3, Claude Code Rider plugin 0.1.14-beta.