github-copilot: accounts without entitlement appear connected but expose no models

[dallenpyrah]

Description

GitHub Copilot authentication succeeds even when the GitHub account has no Copilot subscription or assigned seat, but the provider has no usable models.

In v1, the empty model list sends the user back through the connection flow indefinitely. In v2, Integrations shows GitHub Copilot as connected, but no models are available and there is no actionable explanation that the account lacks a Copilot entitlement.

This differs from reports where paid/entitled accounts lose models because of OAuth scopes. Here the account is known not to have a Copilot subscription or seat.

Expected: after OAuth, OpenCode should detect that the account has no Copilot entitlement and show a clear message. The provider should not appear usable/connected without explaining why no models are available.

Actual: OAuth completion is treated as a successful connection. v1 loops back to connect with an empty model list; v2 shows a connected integration with no models or useful entitlement error.

Plugins

None required

OpenCode version

v1: 1.18.26; v2: v0.0.0-beta-18866

Steps to reproduce

1. Use a GitHub account without a GitHub Copilot subscription or assigned organization seat.
2. In OpenCode v1, choose GitHub Copilot in /connect and complete the GitHub device authorization.
3. Open the model picker. No Copilot models are shown, and attempting to connect again repeats the same flow.
4. Repeat in OpenCode v2.
5. Open Integrations. GitHub Copilot appears connected, but the model list is empty and no message explains the missing entitlement.

Screenshot and/or share link

Not available; this occurs before a usable model can be selected.

Operating System

macOS 26.6.2 (arm64)

Terminal

Ghostty

[github-actions]

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

• GitHub copilot shows no models #46455: GitHub Copilot shows no models after connecting (similar symptom of empty model list post-OAuth)
• GitHub Copilot provider not registered/found for Copilot Student plan (Auto-only mode) #34644: GitHub Copilot provider not registered for Student/Free plan (Auto-only mode) — same root cause of OAuth succeeding but no usable models being surfaced, no actionable error shown
• GitHub Copilot provider shows zero models: all models return model_picker_enabled: false #42083: GitHub Copilot provider shows zero models because all models return model_picker_enabled: false — related investigation into why models disappear after successful auth

If your issue is specifically about accounts with no Copilot subscription/seat (rather than a subscription that exists but isn't working), it may still be a distinct case worth tracking separately. Please review the above and comment if you believe this is unique.