Claude Code extension hides Codex (OpenAI) panel after VS Code restart

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?

Bug Description

When both "Claude Code for VS Code" and "Codex – OpenAI's coding agent"
extensions are enabled simultaneously, the Codex panel disappears from
the Activity Bar after restarting VS Code. Only the Claude Code panel
remains visible.

Steps to Reproduce

1. Have both extensions installed and enabled:

• Claude Code for VS Code (anthropic.claude-code) v2.1.160
• Codex – OpenAI's coding agent (openai.chatgpt) v26.527.31454

1. Both panels are visible and working correctly in the current session
2. Restart VS Code
3. After restart: only Claude Code panel is visible, Codex panel is hidden

Expected Behavior

Both panels should remain visible after restart, just like GitHub Copilot
and Codex coexist without any conflict.

Actual Behavior

Codex panel disappears from the Activity Bar. It can be manually restored
by right-clicking the Activity Bar and re-enabling it, but it hides again
on the next restart.

Additional Context

• GitHub Copilot and Codex work together without this issue
• The problem only occurs when Claude Code extension is enabled
• Manually enabling Claude Code during a session (without restart) allows

both panels to work simultaneously — the conflict only happens on startup

• This suggests Claude Code is hiding or overriding other extension panels

during its initialization

Environment

• OS: Windows 10 Pro (10.0.19045)
• VS Code Version: 1.104
• Claude Code Extension: v2.1.160
• Codex Extension: v26.527.31454

What Should Happen?

Both Claude Code and Codex panels should remain visible in the
Activity Bar after restarting VS Code, just as GitHub Copilot
and Codex coexist without any conflict.

Error Messages/Logs

No error messages. The issue is silent — Codex panel simply 
disappears from the Activity Bar without any warnings or logs.

Steps to Reproduce

1. Install both extensions in VS Code:

• Claude Code for VS Code (anthropic.claude-code) v2.1.160
• Codex – OpenAI's coding agent (openai.chatgpt) v26.527.31454

1. Enable both extensions
2. Verify that both panels are visible in the Activity Bar
3. Restart VS Code
4. After restart: Codex panel is gone from the Activity Bar,

only Claude Code panel is visible

Note: Manually re-enabling Codex from the Activity Bar
right-click menu works temporarily, but the panel disappears
again on the next restart. GitHub Copilot and Codex coexist
without this issue.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.160 (VS Code Extension)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

<img width="2560" height="1387" alt="Image" src="https://github.com/user-attachments/assets/6b8ed67b-4dcb-48df-9c33-e29b7a0afded" />
<img width="2560" height="1387" alt="Image" src="https://github.com/user-attachments/assets/98faa8e3-77b3-4dc4-a733-7584aa5259cc" />
<img width="2560" height="1387" alt="Image" src="https://github.com/user-attachments/assets/82403197-2312-4b6d-bbd4-243b8da91fb0" />