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experiment: revert PR 8035 to test e2e impact#8423

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experiment: revert PR 8035 to test e2e impact#8423
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jacek/revert-pr-8035-experiment

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@jacekradko
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Do not merge. Sandbox to verify whether reverting #8035 (auto-proxy for eligible hosts) flips the consistently-failing express / hono / generic / nextjs / billing / machine integration suites back to green.

If the integration matrix on this branch goes mostly green compared to recent runs on `main`, that confirms #8035 is the regression source. Will be closed regardless of outcome.

Related: #8422 (the actual fix PR currently open).

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vercel Bot commented Apr 30, 2026

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clerk-js-sandbox Ready Ready Preview, Comment Apr 30, 2026 3:45am

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⚠️ No Changeset found

Latest commit: 2df6b35

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commit: 2df6b35

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coderabbitai Bot commented Apr 30, 2026

📝 Walkthrough

Walkthrough

This pull request removes the automatic proxy URL detection and derivation feature across the Clerk monorepo. The changes eliminate environment-based auto-proxy logic from multiple layers: the backend authentication context, the clerk-js core initialization, the nextjs middleware, utility functions, and the shared proxy utilities. Additionally, relative proxy URL path handling in script loading is removed, and Vercel-specific environment variables are removed from Turbo's global task dependencies. Corresponding test coverage for auto-proxy behavior is deleted across all affected packages.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly summarizes the main change: this PR reverts PR #8035 to test its e2e impact on failing integration tests.
Description check ✅ Passed The description directly relates to the changeset by explaining the revert of auto-proxy functionality and its purpose for testing integration suite outcomes.
Docstring Coverage ✅ Passed Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.

✏️ Tip: You can configure your own custom pre-merge checks in the settings.


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Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (1)
packages/shared/src/loadClerkJsScript.ts (1)

283-293: ⚠️ Potential issue | 🟠 Major | ⚡ Quick win

Preserve relative proxy URL handling here.

proxyUrl still accepts relative values, but this branch now routes them through browser-only normalization and then concatenates the result directly. That breaks server-side clerkJSScriptUrl / clerkUIScriptUrl callers and can emit malformed .../proxy//npm/... URLs when the proxy path has a trailing slash.

Please restore the previous relative-proxy path or normalize the proxy path before building the script host.

🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.

In `@packages/shared/src/loadClerkJsScript.ts` around lines 283 - 293,
buildScriptHost currently converts proxyUrl via proxyUrlToAbsoluteURL then
strips the protocol, which breaks server-side callers and produces malformed
paths when proxyUrl is a relative path (especially with trailing slash). Update
the proxyUrl branch in buildScriptHost to detect relative proxy URLs and either
(a) return the original relative path (preserving behavior for server-side
callers) or (b) normalize the proxy path by removing a trailing slash before
concatenation; use the existing helpers (isValidProxyUrl, proxyUrlToAbsoluteURL)
but ensure relative URLs bypass proxyUrlToAbsoluteURL or are normalized (trim
trailing slash) so buildScriptHost returns a correct host string for both server
and browser usage. Reference: function buildScriptHost, helper
proxyUrlToAbsoluteURL, and isValidProxyUrl.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.

Outside diff comments:
In `@packages/shared/src/loadClerkJsScript.ts`:
- Around line 283-293: buildScriptHost currently converts proxyUrl via
proxyUrlToAbsoluteURL then strips the protocol, which breaks server-side callers
and produces malformed paths when proxyUrl is a relative path (especially with
trailing slash). Update the proxyUrl branch in buildScriptHost to detect
relative proxy URLs and either (a) return the original relative path (preserving
behavior for server-side callers) or (b) normalize the proxy path by removing a
trailing slash before concatenation; use the existing helpers (isValidProxyUrl,
proxyUrlToAbsoluteURL) but ensure relative URLs bypass proxyUrlToAbsoluteURL or
are normalized (trim trailing slash) so buildScriptHost returns a correct host
string for both server and browser usage. Reference: function buildScriptHost,
helper proxyUrlToAbsoluteURL, and isValidProxyUrl.

ℹ️ Review info
⚙️ Run configuration

Configuration used: Repository YAML (base), Organization UI (inherited)

Review profile: CHILL

Plan: Pro

Run ID: 1560bd88-b204-41af-ad90-7a1bce2428e1

📥 Commits

Reviewing files that changed from the base of the PR and between 61e0a78 and 2df6b35.

📒 Files selected for processing (14)
  • packages/backend/src/tokens/__tests__/authenticateContext.test.ts
  • packages/backend/src/tokens/authenticateContext.ts
  • packages/clerk-js/src/core/__tests__/clerk.test.ts
  • packages/clerk-js/src/core/clerk.ts
  • packages/nextjs/src/app-router/server/__tests__/DynamicClerkScripts.test.tsx
  • packages/nextjs/src/server/__tests__/clerkMiddleware.test.ts
  • packages/nextjs/src/server/clerkMiddleware.ts
  • packages/nextjs/src/utils/__tests__/mergeNextClerkPropsWithEnv.test.ts
  • packages/nextjs/src/utils/mergeNextClerkPropsWithEnv.ts
  • packages/shared/src/__tests__/loadClerkJsScript.spec.ts
  • packages/shared/src/__tests__/proxy.spec.ts
  • packages/shared/src/loadClerkJsScript.ts
  • packages/shared/src/proxy.ts
  • turbo.json
💤 Files with no reviewable changes (8)
  • turbo.json
  • packages/nextjs/src/app-router/server/tests/DynamicClerkScripts.test.tsx
  • packages/backend/src/tokens/authenticateContext.ts
  • packages/nextjs/src/server/tests/clerkMiddleware.test.ts
  • packages/clerk-js/src/core/tests/clerk.test.ts
  • packages/backend/src/tokens/tests/authenticateContext.test.ts
  • packages/nextjs/src/utils/tests/mergeNextClerkPropsWithEnv.test.ts
  • packages/shared/src/tests/loadClerkJsScript.spec.ts

@jacekradko
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Closing — the same 5 express tests (and same hono/billing/etc. patterns) fail identically on this branch as on main. reverting #8035 (auto-proxy) does not fix the userButton mount regression. Pattern is consistent across all four candidate branches we tested (#8422, #8423, #8424, #8426), so the cause is environmental, not in the JS source. Refocusing on infra: Clerk dashboard config on the test instances, FAPI deploys, Blacksmith runner image, or pnpm/Playwright resolution drift.

@jacekradko jacekradko closed this Apr 30, 2026
@jacekradko jacekradko deleted the jacek/revert-pr-8035-experiment branch April 30, 2026 19:03
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