Regression: openai.chatgpt 26.527.60818 fails to load Codex panel with PendingMigrationError

What version of the IDE extension are you using?

26.527.60818

What subscription do you have?

Pro

Which IDE are you using?

VS Code

What platform is your computer?

Darwin 25.4.0 arm64 arm

What issue are you seeing?

After updating the VS Code extension openai.chatgpt to version 26.527.60818, the Codex panel no longer fully loads. The sidebar/panel shell appears with the Codex icon, but the panel never finishes loading.

Downgrading the extension to version 26.527.31454 fixes the issue immediately.

Relevant error from VS Code Developer Tools / extension host logs:

ERR navigator is now a global in nodejs, please see https://aka.ms/vscode-extensions/navigator for additional info on this error.: PendingMigrationError: navigator is now a global in nodejs, please see https://aka.ms/vscode-extensions/navigator for additional info on this error.
    at get (file:///Users/<redacted>/.vscode-server/cli/servers/Stable-8761a5560cfd65fdd19ce7e2bd18dab5c0a4d84e/server/out/vs/workbench/api/node/extensionHostProcess.js:805:7210)
    at /Users/<redacted>/.vscode-server/extensions/openai.chatgpt-26.527.60818-darwin-arm64/out/extension.js:1:10389
    at get value (/Users/<redacted>/.vscode-server/extensions/openai.chatgpt-26.527.60818-darwin-arm64/out/extension.js:1:3497)
    at /Users/<redacted>/.vscode-server/extensions/openai.chatgpt-26.527.60818-darwin-arm64/out/extension.js:21:145

The extension output also showed:

Activating Codex extension
[CodexMcpConnection] Spawning codex app-server
ChatGPT desktop bridge active
Desktop bridge registered
Work with apps desktop bridge initialized
[CodexMcpConnection] Initialize received id=1
[IpcClient] Received broadcast but no handler is configured method=client-status-changed

What steps can reproduce the bug?

1. Use VS Code with the openai.chatgpt extension installed.
2. Update the extension to version 26.527.60818.
3. Open the Codex panel/sidebar.
4. Observe that the panel shell/icon appears, but the panel never fully loads.
5. Open VS Code Developer Tools / extension host logs.
6. Observe the PendingMigrationError: navigator is now a global in nodejs error pointing into openai.chatgpt-26.527.60818-darwin-arm64/out/extension.js.
7. Downgrade the extension to version 26.527.31454.
8. Reopen/reload VS Code.
9. The Codex panel loads successfully again.

This appears to be a regression between 26.527.31454 and 26.527.60818.

What is the expected behavior?

The Codex panel should fully load after opening the sidebar/panel, as it does in version 26.527.31454.

Additional information

Environment:

VS Code
Extension identifier: openai.chatgpt
Broken version: 26.527.60818
Working version: 26.527.31454
Extension host: VS Code Remote SSH
Remote extension package path included darwin-arm64:
openai.chatgpt-26.527.60818-darwin-arm64

The issue appears to be caused by the extension accessing navigator from the Node extension host context, triggering VS Code’s PendingMigrationError. Downgrading to 26.527.31454 resolves the problem without any other configuration changes.