GPT-5 Codex in VSCode: File overwritten into empty bytes after Set-Content replacement — anyone else?

API Bugs
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1

Hi all,

I’ve been using GPT-5 Codex inside VSCode to do code/file replacements.
Sometimes after it applies a patch (e.g., using PowerShell Set-Content to rewrite a file), the file ends up being overwritten into just a few bytes, effectively empty.

This looks like Codex ran a command that failed in the middle, but still executed the final write.

Environment:

  • Extension Identifier: openai.chatgpt

  • Version: 0.4.12

  • Installation Size: 32.61 MB

  • Marketplace Published: 2025-03-06

  • Last Updated / Released: 2025-09-19

Questions:

  • Has anyone else experienced this “empty file” overwrite issue when using GPT-5 Codex in VSCode?

  • Is this a known bug in the Codex VSCode extension, or is it more of a PowerShell side effect?

  • Any recommended safe workflow to prevent data loss (e.g., writing to temp file, auto backup)?

Would love to hear if others ran into the same thing.

Thanks!

2

me too.. wtf what’s the problem i can’t restore my file