[Windows][Sandbox] Codex cannot discover applications installed via Microsoft Store or winget

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

Latest(26.908.70816)

What subscription do you have?

Plus

What platform is your computer?

Windows11 x64

What issue are you seeing?

The Codex Windows sandbox cannot discover or use many applications installed on the computer. In particular, applications installed through the Microsoft Store or winget appear to Codex as if they do not exist or are unavailable.

This is a major limitation for normal Windows workflows because software installed through these common distribution channels is not visible to the sandbox. On the same computer, other coding agents such as WorkBuddy, OpenCode, and DeepSeek Harness can detect these installed applications.

What steps can reproduce the bug?

1. Install an application through the Microsoft Store or winget.
2. Open Codex on Windows and start a task that needs to locate or use that installed application.
3. Ask Codex to discover, locate, or run the application.
4. Observe that Codex reports that the application is missing or unavailable, even though it is installed on the host.
5. Verify that the same application can be detected by other coding agents on the same machine.

The issue affects multiple applications installed through Microsoft Store and winget. No local files or logs are attached.

What is the expected behavior?

Codex should be able to discover and use applications installed through Microsoft Store and winget when they are present on the Windows host, or clearly document the supported installation paths and the reason an application cannot be accessed.

Additional information

Please investigate Windows sandbox application discovery, including PATH resolution, AppX/MSIX package registration, WindowsApps paths, and applications installed by winget. The sandbox appears unable to see many host applications that other coding agents can detect.

Reproduce on Windows 11 x64 with applications installed through the Microsoft Store and winget, then inspect Windows sandbox application discovery, including PATH resolution, AppX/MSIX package registration, and WindowsApps paths. Done means Codex can discover and use those host applications, or clearly documents the supported installation paths and why an application remains inaccessible.