apply_patch fails on Windows with `CreateProcessAsUserW failed: 206` for large patch payloads

What version of Codex CLI is running?

codex-cli 0.117.0

What subscription do you have?

Pro

Which model were you using?

_No response_

What platform is your computer?

x64

What terminal emulator and version are you using (if applicable)?

_No response_

What issue are you seeing?

On Windows, apply_patch fails when the patch payload is large, for example when adding a single large HTML file with inline CSS and JS in one patch.

Instead of applying the patch, Codex returns:

execution error: Io(Custom { kind: Other, error: "windows sandbox: runner error: CreateProcessAsUserW failed: 206" })

Splitting the same change into multiple smaller apply_patch calls works.

What steps can reproduce the bug?

• Add a single index.html file with a large amount of inline CSS and JS.
• The patch is roughly in the 100KB-scale range.
• apply_patch fails before the patch is applied with:
• windows sandbox: runner error: CreateProcessAsUserW failed: 206

What is the expected behavior?

Large patches should either:

• work correctly on Windows

For single-file HTML/CSS/JS outputs or other generated assets, it is natural to emit one large patch. Having to manually split patches is cumbersome and seems unnecessary if the runner can avoid command-line length limits.

Additional information

_No response_