Excel export runtime is missing after reinstall on Windows

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

26.810.52044

What subscription do you have?

ChatGPT Pro

What platform is your computer?

10.0.26200.0 x64

What issue are you seeing?

Summary

Excel export is unavailable because the bundled spreadsheet runtime is missing.

Expected behavior

Codex should download and install the primary runtime automatically, and Excel export should work.

Actual behavior

The spreadsheet dependency cannot be loaded:

No bundled workspace runtime dependencies are configured yet.
Module not found: @oai/artifact-tool

The expected primary runtime directory is missing:

%USERPROFILE%.cache\codex-runtimes\codex-primary-runtime

I reinstalled Codex Desktop and reset the runtime cache. After restarting Codex, it started downloading a runtime archive, but the archive was later removed and the codex-primary-runtime directory was still not created. Excel export remains unavailable.

What steps can reproduce the bug?

Steps to reproduce

Open Codex Desktop on Windows.

Try to create or export an Excel workbook.

Codex cannot load @oai/artifact-tool.

Reinstalling Codex Desktop does not restore the missing runtime.

Impact

I cannot create or export Excel files from Codex.

Environment

Platform: Windows 10.0.26200.0 x64

Codex task ID: 01a00f9b-0267-76a2-b630-2a923d1c58f6

What is the expected behavior?

No response

Additional information

No response

Start by reproducing the Excel export failure in Codex Desktop on Windows and inspect the runtime download and cache path at %USERPROFILE%.cache\codex-runtimes\codex-primary-runtime. Trace why the bundled runtime archive is removed or not extracted and why @oai/artifact-tool cannot load. Done means reinstalling Codex restores the primary runtime and Excel export works.