fix(core): fix path for auto-configure serverless

[NathanFlurry]

No description provided.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Preview	Comments	Updated (UTC)
rivetkit-serverless	Ready	Preview	Comment	Oct 16, 2025 7:41pm

[claude]

Claude finished @NathanFlurry's task —— View job

---

Pull Request Review

Reviewing PR: fix(core): fix path for auto-configure serverless

Todo List:

• Read and analyze changed files
• Review code quality and best practices
• Check for potential bugs or issues
• Evaluate performance considerations
• Assess security concerns
• Review test coverage needs
• Provide comprehensive feedback

---

Summary

This PR removes the /start suffix from serverless configuration URLs in two locations. The changes are minimal but appear to fix an incorrect API endpoint path.

Code Quality & Best Practices ✅

Positive aspects:

• Changes are focused and minimal
• Consistent fix applied in both locations (next-js and rivetkit packages)
• Code maintains existing style and structure
• No breaking changes to public APIs

Bug Analysis ✅

Issue Fixed:
The changes remove an incorrect /start suffix from serverless URLs:

1. packages/next-js/src/mod.ts:31 - Changed from /api/rivet/start to /api/rivet
2. packages/rivetkit/src/registry/mod.ts:269 - Changed from http://localhost:${port}/start to http://localhost:${port}

Impact: This appears to fix a real bug where the serverless auto-configuration was pointing to incorrect endpoints.

Performance Considerations ✅

• No performance impact - These are just URL string changes
• URLs are constructed once during configuration, not in hot paths

Security Concerns ✅

• No security implications - Changes only affect internal URL construction
• No new attack vectors introduced
• No sensitive data exposed

Test Coverage Assessment ⚠️

Concerns:

1. No visible test changes - The PR doesn't include test updates
2. Critical path - Auto-configuration is a core feature that should have tests
3. Integration testing - These URL changes affect how services communicate

Recommendations:

• Add integration tests that verify the correct URLs are generated
• Test both development and production URL generation scenarios
• Verify Vercel/Next.js integration works with the corrected paths

Code-Specific Observations

packages/next-js/src/mod.ts:

• Line 31: Good that this uses the same path pattern as the registry
• Environment variable handling looks robust
• URL construction logic is clean

packages/rivetkit/src/registry/mod.ts:

• Line 269: The fallback URL now correctly matches the expected pattern
• Error handling around this function looks comprehensive
• Configuration object structure is well-defined

Minor Suggestions

1. Add a comment explaining why the /start suffix was removed (for future maintainers)
2. Consider adding validation that ensures URLs don't have trailing /start paths
3. Document the correct API structure to prevent similar issues

Overall Assessment

This is a good, targeted bug fix that:

• ✅ Fixes incorrect API endpoints
• ✅ Maintains code consistency
• ✅ Has no breaking changes
• ⚠️ Could benefit from additional test coverage

Recommendation: Approve with the suggestion to add tests for the auto-configuration feature.

[NathanFlurry]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• chore(example-next-js): update example to chat room #1402
• fix(core): fix path for auto-configure serverless #1401 👈 (View in Graphite)
• chore(example-next-js): configure frontend #1400
• chore(core): update engine runner #1399
• fix(next-js): disable health check by defualt #1398
• chore(core): log headers with _RIVET_LOG_HEADERS #1397
• chore(example-next-js): improve deployment #1396
• main

---

How to use the Graphite Merge Queue

Add either label to this PR to merge it via the merge queue:

• merge queue - adds this PR to the back of the merge queue
• hotfix - for urgent hot fixes, skip the queue and merge this PR next

You must have a Graphite account in order to use the merge queue. Sign up using this link.

An organization admin has enabled the Graphite Merge Queue in this repository.

Please do not merge from GitHub as this will restart CI on PRs being processed by the merge queue.

This stack of pull requests is managed by Graphite. Learn more about stacking.

[pkg-pr-new]

More templates

• example-ai-agent
• example-background-jobs
• example-better-auth-external-db
• example-bots
• chat-room
• example-cloudflare-workers
• example-cloudflare-workers-hono
• example-counter
• example-counter-serverless
• example-crdt
• example-database
• example-deno
• example-sqlite
• example-elysia
• example-express
• example-freestyle
• example-game
• example-hono
• example-hono-bun
• example-hono-react
• example-kitchen-sink
• example-next-js
• example-rate
• example-raw-fetch-handler
• example-raw-websocket-handler
• example-raw-websocket-handler-proxy
• example-react
• example-smoke-test
• starter
• example-stream
• example-sync
• example-tenant
• example-trpc
• example-workflows

@rivetkit/actor

pnpm add https://pkg.pr.new/rivet-dev/rivetkit/@rivetkit/actor@1401

@rivetkit/cloudflare-workers

pnpm add https://pkg.pr.new/rivet-dev/rivetkit/@rivetkit/cloudflare-workers@1401

@rivetkit/core

pnpm add https://pkg.pr.new/rivet-dev/rivetkit/@rivetkit/core@1401

@rivetkit/db

pnpm add https://pkg.pr.new/rivet-dev/rivetkit/@rivetkit/db@1401

@rivetkit/framework-base

pnpm add https://pkg.pr.new/rivet-dev/rivetkit/@rivetkit/framework-base@1401

@rivetkit/next-js

pnpm add https://pkg.pr.new/rivet-dev/rivetkit/@rivetkit/next-js@1401

@rivetkit/react

pnpm add https://pkg.pr.new/rivet-dev/rivetkit/@rivetkit/react@1401

rivetkit

pnpm add https://pkg.pr.new/rivet-dev/rivetkit@1401

@rivetkit/sql-loader

pnpm add https://pkg.pr.new/rivet-dev/rivetkit/@rivetkit/sql-loader@1401

commit: ae376cb

[graphite-app]

Merge activity

• Oct 16, 7:43 PM UTC: NathanFlurry added this pull request to the Graphite merge queue.
• Oct 16, 7:44 PM UTC: CI is running for this pull request on a draft pull request (#1403) due to your merge queue CI optimization settings.
• Oct 16, 7:44 PM UTC: Merged by the Graphite merge queue via draft PR: #1403.