Windows ChatGPT/Codex Store app failed to launch due to AppX package state "Modified, NeedsRemediation"

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

Broken version: OpenAI.Codex_26.721.4979.0_x64__2p2nqsd0c76g0; working after reinstall: OpenAI.Codex_26.721.11231.0_x64__2p2nqsd0c76g0

What subscription do you have?

Unknown / reset-card usage entitlement

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What issue are you seeing?

The Windows ChatGPT/Codex desktop app stopped launching. Clicking the Start Menu entry did not create a ChatGPT.exe process.

Observed before reinstall:

Get-AppxPackage OpenAI.Codex

showed:

PackageFullName: OpenAI.Codex_26.721.4979.0_x64__2p2nqsd0c76g0
Status: Modified, NeedsRemediation
PackageUserInformation: {}

The Start Menu entry existed as:

ChatGPT -> OpenAI.Codex_2p2nqsd0c76g0!App

Launching via:

Start-Process "shell:AppsFolder\OpenAI.Codex_2p2nqsd0c76g0!App"

did not create any ChatGPT.exe process. Windows TWinUI only showed attempted activation, with no app process created. This interrupted an active ChatGPT/Codex workflow and caused loss of usable reset-card/usage entitlement.

What steps can reproduce the bug?

1. Have Microsoft Store ChatGPT/Codex installed as OpenAI.Codex_26.721.4979.0_x64__2p2nqsd0c76g0.
2. Attempt to launch ChatGPT from the Start Menu or via:

Start-Process "shell:AppsFolder\OpenAI.Codex_2p2nqsd0c76g0!App"

1. Observe that no ChatGPT.exe process is created.
2. Check package state:

Get-AppxPackage OpenAI.Codex | Format-List Name,PackageFullName,Status,PackageUserInformation,Version,InstallLocation

1. The package reports Modified, NeedsRemediation.
2. Try repair steps:

Add-AppxPackage -DisableDevelopmentMode -Register "C:\Program Files\WindowsApps\OpenAI.Codex_26.721.4979.0_x64__2p2nqsd0c76g0\AppxManifest.xml"
Reset-AppxPackage -Package OpenAI.Codex_26.721.4979.0_x64__2p2nqsd0c76g0

1. The package still remains broken and does not launch.
2. Uninstalling and reinstalling from Microsoft Store eventually restored the app as OpenAI.Codex_26.721.11231.0_x64__2p2nqsd0c76g0 with Status: Ok.

What is the expected behavior?

The ChatGPT/Codex desktop app should launch normally from the Start Menu. If the AppX package enters a remediation state, Reset-AppxPackage or manifest re-registration should repair it, or the app should provide a clear recovery path instead of silently failing to create a process.

Additional information

After reinstall, the package is currently healthy:

OpenAI.Codex_26.721.11231.0_x64__2p2nqsd0c76g0
Status: Ok

Request: please investigate why the Store package entered Modified, NeedsRemediation and could not be repaired. Also, please review whether usage/reset-card entitlement was consumed or lost during the failed desktop client state and compensate/reissue the affected reset card if applicable.