Workaround: apply CodexThemes themes on Microsoft Store builds (ChatGPT.exe + CDP + selector fix)

[HUC-he]

Environment

Official OpenAI.Codex installed from Microsoft Store (WindowsApps package), build 26.727.x.

Symptom

• apply --launch cannot theme the app: the Store build ignores the graceful quit, and launching resources\codex.exe with debugging flags fails with Access is denied.
• Even when the theme is active, the background artwork does not render.

Root cause

1. The Store package entry point is app\ChatGPT.exe, not resources\codex.exe.
2. Current builds use main[data-app-shell-main-surface] as the main container, while the official runtime looks for main.main-surface, so the home/conversation page markers are never set and artwork selectors do not match.

Workaround (verified)

1. Save your work, then fully quit Codex (force-stop only if the graceful close fails).

2. Launch the Store entry point with loopback debugging:

   Start-Process -FilePath "<install>\OpenAI.Codex_*\app\ChatGPT.exe" -ArgumentList "--remote-debugging-address=127.0.0.1","--remote-debugging-port=9335"

3. Wait until http://127.0.0.1:9335/json/list returns an app:// page.

4. Hot-apply the theme with the official toolchain (no restart needed):

   node --experimental-transform-types apply-theme.ts apply <theme-dir> --port 9335

5. If the artwork still does not render, patch the local runtime selector in apply-theme.ts:

   document.querySelector("main[data-app-shell-main-surface]") || document.querySelector("main.main-surface")

Safety notes

• Never modify WindowsApps, app.asar, or the app signature.
• Keep the debugging port bound to 127.0.0.1 only.
• Re-run after Codex updates; behavior of Store builds can change.