Windows: codex fails silently without Visual C++ Redistributable installed

Description

On Windows, codex fails silently with exit code -1073741515 (0xC0000135 - STATUS_DLL_NOT_FOUND) when the Microsoft Visual C++ Redistributable is not installed. The user gets no error message — the CLI simply does nothing.

Steps to Reproduce

1. Install @openai/codex via npm on a fresh Windows 11 machine without the VC++ Redistributable
2. Run codex in a terminal
3. No output, no error — silent exit

Expected Behaviour

A clear error message telling the user they need to install the Visual C++ Redistributable, with a link to download it.

Actual Behaviour

Silent failure with exit code 0xC0000135 (STATUS_DLL_NOT_FOUND).

Fix

Install the Visual C++ Redistributable from https://aka.ms/vs/17/release/vc_redist.x64.exe — after installing, codex works correctly.

Environment

• OS: Windows 11 Pro 10.0.26200
• codex version: 0.128.0
• Node.js: v24.15.0

Suggestion

Either bundle the required DLLs, add a pre-flight check that detects the missing runtime and prints a helpful error, or document this requirement prominently in the Windows installation instructions.