Inngest Release Notes

We're thrilled to release the developer preview of a new Inngest's orchestration engine capability: Checkpointing. By enabling checkpointing, Inngest workflows stay durable while achieving near-zero inter-step latency.

Checkpointing is designed to support the growing need for real-time Inngest workflows—such as AI workflows—powering interactive and reliable user experiences.

We've been dogfooding Checkpointing for several weeks, and the results are astonishing: near-zero inter-step latency and an overall 50% reduction in workflow duration.

Checkpointing is currently available in developer preview as an opt-in configuration at the client or function level.

Get started and learn more about Checkpointing.

We are excited to announce the release of MCP Integration, bringing AI-assisted development workflows to the Inngest dev server. Connect Claude Code, Cursor, and other AI assistants directly to your local Inngest functions for seamless testing and debugging.

The MCP server provides comprehensive access to your development environment with 8 powerful tools:

• Event management - Send events and discover registered functions
• Real-time monitoring - Track function execution and debug failures with detailed traces
• Direct function invocation - Execute functions synchronously and get immediate results
• Documentation access - Search and read Inngest documentation offline
• Integration testing - Poll multiple runs to verify complex workflows

Learn more in the MCP Integration documentation.

Webhooks are now more flexible with the addition of x-www-form-urlencoded and multipart/form-data content types.

When sending a request with either of these content types, your webhook transform will have access to both a JSON object representation of the body and the raw body as a string.

For example, if you send a webhook request like the following:

curl https://inn.gs/e/REDACTED \
  -H "content-type: application/x-www-form-urlencoded" \
  -d "name=Alice&messages=hello&messages=world"

And your webhook transform looks like this:

function transform(json, headers, queryParams, raw) {

  return {

    name: "hi",

    data: { json, raw },

  };

};

Then the resulting event data will be:

{

  "json": {

    "messages": [

      "hello",

      "world"

    ],

    "name": [

      "Alice"

    ]

  },

  "raw": 

  "name=Alice&messages=hello&messages=world"

}

Note that the JSON object's values are always arrays of strings.

Changelog

🚀 Features

• (tracing) Allow system queue tracing (#4442)
• (score) Make score kind constant (#4482)
• (sessions) Sessions page optimization (#4480)

🐛 Bug Fixes

• (support) Fix local dev deps misalignment (#4472)
• Update experiments docs links (#4481)

⚙️ Miscellaneous Tasks

• Dedup parallel fan-in discovery via coalesce key (#4452)
• (insights) Add "Open in Insights" button on Failed Functions chart on the Metrics page (#4046)
• (metrics) Add counter to checkpoint ops (#4478)

Changelog

🚀 Features

• (queue) Track earliest peek time before Constraint API (#4391)

🐛 Bug Fixes

• Queue item cleanup race in non-key-queues postgres cancel path (#4337)
• (dashboard) Use distinct speedometer icon for sidebar Overview (#4429)
• (tests) Widen timing tolerance from 10ms to 100ms in TestStartAll/TestSingleSvcError (#4115)
• Alias conflicting grpc import (#4436)
• (tests) Replace 50ms settle delay with deterministic clock.BlockUntil() in TestQueueItemProcessWithConstraintChecks (#4434)
• (queue) Ignore already-leased partitions during scan (#4438)
• Keep completed runs from being reported as reverted (#4247)
• (tests) Increase WaitForRunStatus timeouts in all affected E2E tests (#4435)
• Make WaitForRunStatus tolerate transient not found GQL errors (#4206)
• (executor) Always SavePending after parallel ops to coalesce discovery (#4021)
• Scope GetSpanOutput query by run_id to prevent cross-run data leak (#4441)
• (scoring) Improve scoring dashboard ui (#4433)

🧪 Testing

• (cqrs) Cover all terminal trace run statuses (#4446)

⚙️ Miscellaneous Tasks

• (tests) Fix flaky test status (#4439)
• (tests) Flaky test fix (#4440)
• Ttl upsert pkg (#4432)