GitHub OAuth login fails with "Failed query: update `user`" — email param comes back empty

[asmartin-ai]

Description

Signing into opencode.ai via "Continue with GitHub" fails at the OAuth callback with a server-side SQL error. The account_id resolves correctly, but the email parameter being written is empty, which breaks the update.

Redirected to:
https://opencode.ai/auth/callback?error=server_error&error_description=Failed+query%3A+update+%60user%60+set+%60account_id%60+%3D+%3F%2C+%60email%60+%3D+%3F+where+%60user%60.%60email%60+%3D+%3F...

Rendered error:
{"error":"No authorization code found.","cause":{"error":"server_error","error_description":"Failed query: update user set account_id = ?, email = ? where user.email = ?\nparams: acc_01KWSQEYZ942CFSMVGE47NQX7P,,asmartin.ai.dev@gmail.com"}}

Note the second bound param (the new email to SET) is empty — only account_id and the WHERE-clause email are populated.

Steps to reproduce

1. Go to opencode.ai and click "Continue with GitHub"
2. Authorize the GitHub OAuth app
3. Get redirected back to /auth/callback with the server_error above

Troubleshooting already tried (did not help)

• Revoked opencode's prior GitHub OAuth grant and re-authorized fresh
• Revoked/removed any Google-linked opencode authorization for the same email
• Retried after all of the above — identical error, same account_id, same empty email param

This suggests the bug is server-side in how opencode resolves/writes the email from GitHub's OAuth response, not an account-state issue on the user's end (related to #35150, which hit "emails.find is not a function" in the same callback path).

Operating System

Windows 10

OpenCode version

N/A (web signup flow, not CLI)