[Bug]: Port keeps changing for oauth login with Antigravity

[ranjanjayapal]

Description

There is an issue with OAuth where the port keeps changing (not always 36742). I am trying to connect via ssh but since the port is always changing I cannot setup my localhost to show up at all.

Reproduction Steps

Steps to reproduce the behavior:

1. Go to opencode auth login
2. Click on Google provider
3. Click on the provided link
4. See error when it trys to redirect as the port is always different.

Expected Behavior

Should be able to authenticate

Actual Behavior

Localhost shows an error since I am using via ssh and the port is not exposed as the port keeps changing

Environment

• OS: Linux
• Version: 22.04

Opencode Information

• Opencode Type: cli
• Opencode Version: 1.0.203
• Opencode Settings:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": [
    "oh-my-opencode",
    "opencode-google-antigravity-auth"
  ]
}