chore: bump rivetkit protocol version

[MasterPtato]

Description

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Type of change

• Bug fix (non-breaking change which fixes an issue)
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• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

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Checklist:

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[MasterPtato]

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: bump rivetkit protocol version #4329 👈 (View in Graphite)
• fix(udb): add txn tagging #4328
• fix(api): make actor destroy wait for ack #4327
• chore: flatten runtime config #4326
• chore: deploy patch #4324
• main

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[railway-app]

🚅 Deployed to the rivet-pr-4329 environment in rivet-frontend

Service	Status	Web	Updated (UTC)
website	😴 Sleeping (View Logs)	Web	Feb 27, 2026 at 11:58 pm
frontend-inspector	😴 Sleeping (View Logs)	Web	Feb 27, 2026 at 11:57 pm
frontend-cloud	❌ Build Failed (View Logs)	Web	Feb 27, 2026 at 11:51 pm
mcp-hub	✅ Success (View Logs)	Web	Feb 27, 2026 at 11:50 pm
ladle	❌ Build Failed (View Logs)	Web	Feb 27, 2026 at 11:49 pm

[claude]

PR Review: chore: bump rivetkit protocol version

This is a small, focused PR with two changes. Both look correct.

Change 1: Protocol version bump (v5 → v6)

The bump in engine/sdks/typescript/runner/src/mod.ts aligns the TypeScript runner with the server's latest protocol version. The Rust engine already has full v6 support, including:

• v5_to_v6 / v6_to_v5 converters in engine/sdks/rust/runner-protocol/src/versioned.rs
• v6 adds actor_stop_threshold and serverless_drain_grace_period to ProtocolMetadata

No concerns here — the server correctly handles both v5 and v6 clients via the converter chain.

Change 2: Serverless URL path fix

The fix in engine/sdks/typescript/test-runner/src/index.ts corrects a bug: the URL was missing the /api/rivet prefix, so the engine (which appends /start and /metadata to the base URL) was calling nonexistent routes. The actual routes are registered at /api/rivet/start and /api/rivet/metadata, so the base URL should use the /api/rivet prefix.

The Rust serverless code properly trims trailing slashes before appending (url.trim_end_matches(/)), so no double-slash risk.

Minor observation

The PR description template has not been filled in (checklist, test plan, etc.) — fine for a small chore PR, but worth noting for larger changes in the future.

Overall: LGTM. Both changes are correct and minimal.

[pkg-pr-new]

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@rivetkit/cloudflare-workers

pnpm add https://pkg.pr.new/rivet-dev/rivet/@rivetkit/cloudflare-workers@4329

@rivetkit/framework-base

pnpm add https://pkg.pr.new/rivet-dev/rivet/@rivetkit/framework-base@4329

@rivetkit/next-js

pnpm add https://pkg.pr.new/rivet-dev/rivet/@rivetkit/next-js@4329

@rivetkit/react

pnpm add https://pkg.pr.new/rivet-dev/rivet/@rivetkit/react@4329

rivetkit

pnpm add https://pkg.pr.new/rivet-dev/rivet/rivetkit@4329

@rivetkit/sql-loader

pnpm add https://pkg.pr.new/rivet-dev/rivet/@rivetkit/sql-loader@4329

@rivetkit/sqlite-vfs

pnpm add https://pkg.pr.new/rivet-dev/rivet/@rivetkit/sqlite-vfs@4329

@rivetkit/traces

pnpm add https://pkg.pr.new/rivet-dev/rivet/@rivetkit/traces@4329

@rivetkit/workflow-engine

pnpm add https://pkg.pr.new/rivet-dev/rivet/@rivetkit/workflow-engine@4329

@rivetkit/virtual-websocket

pnpm add https://pkg.pr.new/rivet-dev/rivet/@rivetkit/virtual-websocket@4329

@rivetkit/engine-runner

pnpm add https://pkg.pr.new/rivet-dev/rivet/@rivetkit/engine-runner@4329

@rivetkit/engine-runner-protocol

pnpm add https://pkg.pr.new/rivet-dev/rivet/@rivetkit/engine-runner-protocol@4329

commit: d1f7b22

[MasterPtato]

This change is part of the following stack:

• chore: deploy patch #4324
  • chore: flatten runtime config #4326
    • fix(api): make actor destroy wait for ack #4327
      • fix(udb): add txn tagging #4328
        • chore: bump rivetkit protocol version #4329 ◀

_{Change managed by git-spice.}