## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.
YES
## What kind of change does this PR introduce?
Feature
## Summary
Introduce a "Sign in with ChatGPT" option gated by the new
`dashboard_auth:sign_in_with_chatgpt` feature flag and a manual
localStorage rollout switch (`SIGN_IN_CHATGPT_ENABLED`), since the
feature is still WIP.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added support for signing in with ChatGPT alongside GitHub.
* ChatGPT sign-in now depends on both a feature flag and an additional
rollout setting.
* Updated provider availability so the app can show the correct sign-in
options.
* **Bug Fixes**
* Improved validation and coverage to ensure sign-in options appear only
when fully enabled.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.
YES/NO
## What kind of change does this PR introduce?
Bug fix, feature, docs update, ...
## What is the current behavior?
Please link any relevant issues here.
## What is the new behavior?
Feel free to include screenshots if it includes visual changes.
## Additional context
Add any other context or screenshots.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
## Release Notes
* **New Features**
* Added “Continue with {provider}” sign-in and sign-up flows using
enabled external identity providers.
* Enabled inbound branding to focus a specific provider for customized
sign-in/sign-up experiences.
* **Improvements**
* Refined the sign-in options layout and “last used” tracking for
clearer authentication choices.
* Updated account identity/provider connection experiences (link/unlink
and management UI).
* **Bug Fixes**
* Fixed hydration mismatches in sign-in and password-related layouts.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: Joshen Lim <joshenlimek@gmail.com>
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