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fix(auth): working Google/GitHub sign-in buttons, opt-in per client - #259
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DjimoSerodio wants to merge 7 commits into
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…cial
The login page rendered the social buttons as links to
/api/auth/sign-in/social?provider=...&callbackURL=/auth/complete. A link
click is a GET, but better-auth 1.4.18 registers /sign-in/social as
POST-only, so every click ended on a 404 and the buttons could never start
a sign-in on an instance with GOOGLE_CLIENT_ID/SECRET or
GITHUB_CLIENT_ID/SECRET set.
Render them as <button type="button" data-social-provider="google|github">
and add one click handler to the existing page script: it POSTs
{ provider, callbackURL: '/auth/complete' } to authBasePath +
'/sign-in/social' (same origin, so already inside connect-src 'self') and
follows the provider URL better-auth returns. On any failure it shows the
page's standard error flash and re-enables the button. The button stays
disabled while the POST is in flight, because a second POST would replace
the first one's OAuth state cookie, and is re-enabled when the page comes
back from the back/forward cache.
No new endpoint, configuration or dependency; /auth/complete is unchanged.
Tests: new login-page-social-buttons.test.ts runs the page's real inline
script in a node:vm context against a stand-in DOM and clicks the buttons
(all 10 cases fail against main). The documentation-style assertions in
social-providers.test.ts that still described a GET link now describe the
POST.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A provider's button now renders only when the operator configured it and the OAuth client lists it in epds_social_providers, the same way epds_handle_login_url gates the ATProto/Bluesky button. Configuring Google on a shared PDS therefore leaves the login page of every other client unchanged. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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| Check name | Status | Explanation | Resolution |
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| Docstring Coverage |  |
Docstring coverage is 56.25% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 16 functions across 7 files. (1 skipped: … | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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Check name Status Explanation Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Title check The title clearly and concisely describes the main change: fixing Google and GitHub sign-in buttons and adding per-client opt-in behavior. Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request.
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Docstring coverage is 56.25% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 16 functions across 7 files. (1 skipped: 1 unsupported.)
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Write docstrings for the functions missing them to satisfy the coverage threshold.
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Actionable comments posted: 2
- 🪄 Fix comments: Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @.changeset/social-sign-in-buttons-post.md:
- Line 11: Move the **Client app developers:** section before the **Operators:**
section in the changeset, matching the audience order listed in **Affects:**;
leave the section content unchanged.
Review comments at @packages/auth-service/src/routes/login-page.ts:
- Around line 1261-1262: Update the social sign-in button handlers so starting a
request disables both the Google and GitHub buttons, preventing a second request
from replacing the active OAuth state. If the request fails, re-enable both
buttons; preserve the existing successful sign-in flow.
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📒 Files selected for processing: 7
.changeset/social-sign-in-buttons-post.mddocs/configuration.mddocs/tutorial.mdpackages/auth-service/src/__tests__/login-page-social-buttons.test.tspackages/auth-service/src/__tests__/social-providers.test.tspackages/auth-service/src/routes/login-page.tspackages/shared/src/client-metadata.ts
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The login page script assigned window.location to whatever URL /sign-in/social returned. Follow it only when it is an https URL whose origin is that provider's authorization server (accounts.google.com for Google, github.com for GitHub); any other response shows the standard "Could not start sign-in" error and re-enables the button. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The social buttons only disabled the button that was clicked, so a click on the other provider, an email code send, a verify or a handle hand-off could start while the first sign-in was still in flight; a second /sign-in/social replaces the first one's OAuth state. One page-wide guard now covers the social buttons, sending and resending an email code, verifying it, and the ATProto/Bluesky handle hand-off. Each handler claims it before starting a request, releases it when the attempt fails, and keeps it while the page navigates away. Sending a code releases it once the code is sent, so the verify that follows can run. The verify form's own double-submit latch is folded into it. A page restored from the back/forward cache releases it. The login page script harness moves to __tests__/__helpers__ so the new guard tests and the social button tests share it. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Also tell end users that only one sign-in runs at a time. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The sign-in guard and social button tests rendered the page with the same option block; it now lives next to the script harness. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Kzoeps
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Oct 21, 2026
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just one issue that i spotted after the disable fix but looks good otherwise
| document.querySelectorAll('[data-social-provider]'), | ||
| ); | ||
| var signInBusy = false; | ||
| function setSocialButtonsDisabled(disabled) { |
Contributor
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i think we should include the email otp button here as well. otherwise it remains clickable but without any function
…in flight Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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@Ashex thanks, both done:
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Problem
When
GOOGLE_CLIENT_ID/GOOGLE_CLIENT_SECRET(or the GitHub pair) are set, the login page renders the social buttons as plain links (login-page.ts#L579):A link click is a GET, but better-auth 1.4.18 registers
/sign-in/socialas POST-only. Nothing else answers a GET under/api/auth/*, so every click ends on a 404: the social buttons have never been able to start a sign-in. The same markup is in 0.7.0.Turning a provider on also adds its button to every client's login page on that PDS, with no way for a client to say whether it wants it.
Fix
The buttons POST. They render as
<button type="button" class="btn-social btn-google" data-social-provider="google">(and GitHub), keeping the.btn-socialstyling. One click handler in the page's existing<script>POSTs{ provider, callbackURL: '/auth/complete' }toauthBasePath + '/sign-in/social'(same origin, insideconnect-src 'self') and follows the provider URL better-auth returns. On failure it shows the page's standard error flash. The button is disabled while the POST is in flight, since a second POST would replace the first one's OAuth state cookie, and is re-enabled on failure and onpageshowfrom the back/forward cache.Social buttons are opt-in per client. A provider's button renders only when the operator configured it and the client lists it in its client metadata, the same way
epds_handle_login_urlgates the ATProto/Bluesky button:{ "epds_social_providers": ["google"] }So configuring Google on a shared PDS leaves every other client's login page unchanged. Because the buttons never worked before, no client loses a working sign-in.
No new endpoint or dependency, and the
/auth/completebridge is unchanged. The handler lives in the existing script block rather than an inlineon*attribute, so it is compatible with #100 (nonce CSP).Tested end to end with real Google
On a local 0.9.0 stack (
74bae33c+ this branch), with a real Google OAuth client in Testing mode and a real Google account:POST /api/auth/sign-in/socialand got 200. Google was asked to return to the registered redirect URI./auth/complete.emailConfirmed: trueboth times.24 of 24 checks passed. The harness runs the real PDS, auth-service and a stand-in DID directory locally, so nothing reached
plc.directoryor any hosted instance.Tests
packages/auth-service/src/__tests__/login-page-social-buttons.test.ts. It checks the markup (no/sign-in/social?provider=link left) and runs the page's real inline script in anode:vmcontext against a small stand-in DOM to click the buttons: the POST body and URL,location.assignwith the returned URL, the in-flight double-click guard, the error flash and re-enable after a non-2xx, a response withouturl, a network error, and the bfcache re-enable. It also covers the opt-in: no buttons withoutepds_social_providers, only the listed providers, and unknown or non-array values ignored.social-providers.test.tsthat described a GET link now describe the POST.pnpm format:check,pnpm lintandpnpm typecheckare clean.pnpm test:coveragepasses: 81 files and 1213 tests, coverage 61.7 / 60.96 / 74.39 / 60.5 against floors 61 / 60 / 74 / 60.Docs and changeset
docs/tutorial.mdgets an "Optional: offer Google or GitHub sign-in" section next to the Bluesky one.docs/configuration.mdnotes the per-client opt-in.patch), Affects: End users, Client app developers, Operators. Branding CSS that targeteda.btn-google/a.btn-githubshould target.btn-google/.btn-github.Follow-up
#260, stacked on this one, makes social sign-in safer to switch on: strict
email_verified, trusting Google's email only where Google is authoritative (Gmail and Workspace), no account or session for an unverified email, and errors returned to the login page.🤖 Generated with Claude Code
Summary by CodeRabbit
New Features
Bug Fixes
Documentation