How to run only the network checks with codex doctor in Codex

Codex CLI 0.166.0 adds a --network-only option to codex doctor. It runs just the configuration, connectivity and WebSocket diagnostics, so when Codex gets no response or the connection drops you don't have to wait for the full check.

1. Update Codex to 0.166.0 or later.

npm install -g @openai/codex@0.166.0

1. Run only the network diagnostics.

codex doctor --network-only

The release notes mention this option in a single line, and the official CLI docs for codex doctor don't list it yet. I couldn't confirm whether it can be combined with the documented --summary and --json.