Windows Codex app fails to handle codex:// protocol links #25822

What version of the Codex App are you using (From “About Codex” dialog)?

• OS: Windows - Codex package: OpenAI.Codex_26.527.7698.0_x64__2p2nqsd0c76g0 - Codex version: 26.527.7698.0 - Install source/signature: Microsoft Store / Store-signed MSIX

What subscription do you have?

Free

What platform is your computer?

OS: Microsoft Windows 11 Enterprise, version 10.0.26200, build 26200, x64 CPU: AMD Ryzen 7 9800X3D 8-Core Processor

What issue are you seeing?

Issue:
The Windows Codex desktop app fails when launched via the codex:// protocol. This breaks GitHub authorization callback and local wake/deep-link flows.

What steps can reproduce the bug?

Steps to reproduce:

1. Install/open Codex on Windows.

2. Open PowerShell.

3. Run:

   Start-Process "codex://test"

What is the expected behavior?

Expected behavior:
Codex should open or focus the existing Codex window and handle the codex:// URL internally.

Additional information

Actual behavior:
An Electron error dialog appears:

Error launching app
Unable to find Electron app at C:\Program Files\WindowsApps\OpenAI.Codex_26.527.7698.0_x64__2p2nqsd0c76g0\app\c...\test

Cannot find module 'C:\Program Files\WindowsApps\OpenAI.Codex_26.527.7698.0_x64__2p2nqsd0c76g0\app\c...\test'

Impact:

• GitHub authorization cannot complete because the browser callback to Codex fails.
• Local wake/deep-link actions fail for the same reason.

Troubleshooting already attempted:

• Verified installed package is current user package:
  OpenAI.Codex_26.527.7698.0_x64__2p2nqsd0c76g0
• Re-registered AppX manifest with Add-AppxPackage -DisableDevelopmentMode -Register.
• Confirmed codex:// is registered as a Windows.Protocol AppX association.
• Confirmed the old stale package path issue is gone; the current failure now points to the installed 26.527.7698.0 package.
• The error suggests Electron is treating the codex:// URL as an application path instead of passing it to the Codex app protocol handler.

Request:
Please investigate the Windows MSIX/AppX protocol activation behavior for codex:// links. It appears the app is launched through Electron’s default app loader rather than the packaged Codex app entry, causing the deep link URL to be interpreted as an app path