What happened?

ChatGPT Plus/Pro Codex subscription login fails when I launch pi with Node 26.0.0.

Failed to login to ChatGPT Plus/Pro (Codex Subscription): Unexpected token ', "d�5��"... is not valid JSON

Same pi install and same OAuth flow work with Node 26.1.0.

Steps to reproduce

1. Launch pi with Node 26.0.0 explicitly:

   /path/to/node-26.0.0/bin/node "$(command -v pi)"

2. Run /login.
3. Select Use a subscription.
4. Select ChatGPT Plus/Pro (Codex Subscription).
5. Complete the browser login.
6. pi shows the JSON parse error above.

Control:

/path/to/node-26.1.0/bin/node "$(command -v pi)"

Repeating the same /login flow with Node 26.1.0 succeeds and saves credentials.

Expected behavior

Codex subscription login should complete successfully, or pi should show a clear runtime-specific diagnostic for affected Node versions.

Version

• pi: 0.75.0
• also observed with pi 0.74.1 before narrowing this to Node 26.0.0
• failing runtime: Node v26.0.0, process.versions.undici=8.0.2
• working runtime: Node v26.1.0, process.versions.undici=8.2.0
• OS: macOS