Plugin OAuth auth methods silently ignored (shadowed by other plugins)

[thoreinstein]

Description

Description

Plugin OAuth authentication methods are silently ignored when multiple plugins provide authentication for the same provider. Currently, the first matching plugin found "shadows" all others, preventing their authentication methods (like OAuth) from being displayed.

Root Cause

In packages/opencode/src/cli/cmd/auth.ts, the code uses Plugin.list().then(x => x.find(...)) to locate a plugin for a given provider. This returns only the first plugin found. If opencode-websearch-cited (which only supports API keys for Google) is loaded before opencode-gemini-auth (which supports OAuth for Google), the OAuth option is never presented to the user.

Plugins

opencode-gemini-auth,opencode-websearch-cited

OpenCode version

1.1.3

Steps to reproduce

1. Install opencode-gemini-auth and opencode-websearch-cited.
2. Run opencode auth login.
3. Select "Google".
4. Observe that only the API key prompt appears; the OAuth option is missing.

Screenshot and/or share link

No response

Operating System

macOS 26.2

Terminal

Ghostty

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• bug: multiple plugins registering auth for the same provider silently overwrite each other #6261: bug: multiple plugins registering auth for the same provider silently overwrite each other
• feat: OAuth Enhancements - Multi-Account, YOLO Mode, Auto-Relogin #9971: feat: OAuth Enhancements - Multi-Account, YOLO Mode, Auto-Relogin

Feel free to ignore if none of these address your specific case.

[Teeflo]

I’m seeing the same behavior on my side.
My config includes both opencode-gemini-auth@latest and opencode-antigravity-auth@beta, and when I run opencode auth login and pick Google, I only get the API key and antigravity – the OAuth method from opencode-gemini-auth never shows up.

[manascb1344]

Linking #8297 for reference!

[manascb1344]

Same issue here: opencode auth login -> Select Google -> only "Enter your API key" is shown; "OAuth with Google (Antigravity)" never appears.

• OpenCode 1.1.53, installed via curl -fsSL https://opencode.ai/install | bash
• Plugin in config: opencode-google-antigravity-auth (shekohex)
• DEBUG log shows the plugin loads: service=plugin path=opencode-google-antigravity-auth loading plugin
• Tried: system terminal (not IDE), running from cd ~, waiting 5+ seconds before selecting Google, full reinstall with opencode uninstall --keep-config --keep-data then install script again. No change.

So the plugin loads but its OAuth method is not shown for Google; only the API key prompt appears. Likely the same root cause as this issue (plugin auth methods ignored or overwritten for Google).

[manascb1344]

Found the root cause and fixed it on my end.

The issue was opencode-websearch-cited also registering auth for the google provider. With two plugins registering for the same provider, only one survives (#6261) - and the API-key-only one won.

Fix: Removed opencode-websearch-cited from my plugin list so only opencode-antigravity-auth registers for Google. OAuth option appeared immediately after that.

So this is a symptom of #6261 (multiple plugins registering auth for the same provider silently overwrite each other). The fix in PR #6260 would resolve this properly by merging auth methods from all plugins.