Codex desktop Computer Use runtime fails before Slack UI automation starts.

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

App package: OpenAI.Codex_26.803.5235.0

What subscription do you have?

Corporate paid connection

What platform is your computer?

Windows 11

What issue are you seeing?

Codex desktop Computer Use runtime fails before Slack UI automation starts.

App package: OpenAI.Codex\_26.803.5235.0\
Runtime: Node.js v24.14.0\
Windows: restarted after reproducing

Slack connector actions work (for example, inspecting/summarizing Slack). However, workflows requiring Slack desktop automation—such as copying/configuring Slack Lists and Workflow Builder—fail because the local node\_repl runtime exits with:

Error: Cannot find module '%LOCALAPPDATA%\Temp.tmp\<random>\kernel.js'

The important detail: immediately after the failed launch, kernel.js and the other staged runtime files are present in that exact temporary folder. This indicates Codex launches Node before the temporary script is fully staged.

I reproduced this after:

• rebooting Windows;
• forcing Codex to rebuild its Computer Use runtime;
• confirming the Temp folder exists and my user has full control;
• finding no relevant Microsoft Defender event.

Please investigate the desktop Computer Use/node\_repl temporary-kernel startup race.

node_repl kernel exited unexpectedly
Error: Cannot find module
'C:\Users\Nitin\AppData\Local\Temp\.tmp6lxRAA\kernel.js'
code: 'MODULE_NOT_FOUND'
Node.js v24.14.0

What steps can reproduce the bug?

Feedback ID: 019fe61f-f015-7cb1-a73f-bdb120e4b832

What is the expected behavior?

The Slack desktop automation should work seamlessly and be able to complete the automation task

Additional information

The Slack desktop-control runtime failed before Slack could be opened: