codex resume --last fails with "stdin is not a terminal" in interactive PowerShell (Windows)

What version of Codex CLI is running?

v0.116.0

What subscription do you have?

Free

Which model were you using?

gpt-5.4

What platform is your computer?

Microsoft Windows NT 10.0.26200.0

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

Windows PowerShell

What issue are you seeing?

Running codex resume --last or codex resume --last --no-alt-screen fails with:

stdin is not a terminal

This happens even though the command is executed in a normal interactive PowerShell session.

TTY appears to be valid:

• echo $Host.UI.RawUI returns proper structured output
• Terminal is not WSL / not VSCode restricted shell

Also observed warning:
WARNING: proceeding, even though we could not update PATH: Access is denied. (os error 5)

What steps can reproduce the bug?

1. Open Windows PowerShell (normal interactive session)
2. Run:

codex resume --last --no-alt-screen

1. Observe error:

stdin is not a terminal

What is the expected behavior?

The CLI should detect the interactive PowerShell TTY and resume the last session successfully.

Additional information

• codex --help works correctly
• codex resume fails consistently (not just --last)
• Environment is not nested (not WSL, not VSCode terminal)
• Suggests a Windows TTY detection issue in Codex CLI v0.116.0