Upstream checked July 17, 2026 · 26c6c410e0e0

How to install a Codex theme on Windows

The current upstream Windows workflow is reversible and validates the Store package. Its public guide does not yet document macOS-equivalent arbitrary-image customization.

Upstream instructions can change. Before running commands, compare this guide with the original GitHub repository.
Do not assume platform parity. The current Windows guide documents the bundled skin workflow, not a website-style arbitrary-image command. This site exports a wallpaper and recipe but does not claim that Windows consumes them directly.

Requirements

Install and launch

Close Codex. From the upstream windows directory, run the installer once and then use the launcher:

powershell -NoProfile -ExecutionPolicy Bypass -File scripts\install-dream-skin.ps1
powershell -NoProfile -ExecutionPolicy Bypass -File scripts\start-dream-skin.ps1

The launcher asks before restarting an already open Codex app. Command-line callers must explicitly add -RestartExisting; do not hide that choice in automation.

Verify the live UI

powershell -NoProfile -File scripts\verify-dream-skin.ps1 -ScreenshotPath C:\absolute\path\verify.png

The upstream guide treats a missing hero, native composer, sidebar skin or injection marker as a failure. Inspect both Home and a normal Task; the suggestion count can change responsively.

Security boundaries

Restore before troubleshooting by hand

Use the documented restore script rather than deleting files or editing the app package. The restore guide explains the optional flags.