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Rivet

DEVOPS
Velocity7.5

Rivet Actors can now fork in 20 ms, SQLite database included, without copying data.

actorsai agentssqliteforkingstorage enginerust
◆Current state
Rivet builds infrastructure for long-lived actors and AI agents: BYOC, OpenTelemetry tracing, actor-scoped JWTs and agentOS Hosted VMs. The 3.0 Preview made Rivet a single stateless binary on S3, and the Rust SDK reached general availability on 6 November. On 11 November Rivet added actor forking: a fork starts in 20 ms with the original actor's state and SQLite database and costs nothing until it writes.
◆Where it's heading
Rivet keeps turning its S3-backed storage engine into features for agent workloads. Copy-on-write forking follows from the 3.0 storage design and gives agents a cheap way to branch a session, try something and discard it. The SDK and auth work of the past two months points to Rivet positioning actors as the runtime for agent backends.
◆Prediction
Forking is likely to show up next in agentOS and the Pi integrations as a way to branch agent runs; the entries do not say when 3.0 leaves preview.

◆Recent moves

  1. 2d ago

    Introducing OpenOrange: Run Cloudflare Workers Anywhere

    ⚡ SPARK

    Rivet moves from its own actor runtime to hosting other platforms' code: OpenOrange runs an existing Cloudflare Workers project on AWS, Google Cloud, Azure or self-managed servers. It follows actor forking as Rivet's second push to be the place stateful edge code runs.

  2. 3d ago

    Introducing Actor Forking for SQLite

    ⚡ SPARK

    Actor forking builds directly on the 3.0 storage engine: a fork shares the original's data until it writes. It gives the agent features Rivet has shipped since September a way to branch state cheaply.

  3. 8d ago

    Rust SDK for Rivet Actors Is Now Generally Available

    The Rust SDK for Rivet Actors reaches GA with SQLite, WebSockets, cron and OpenTelemetry. It opens the actor platform to Rust teams while 3.0 is still in preview.

  4. 19d ago

    Introducing Rivet 3.0 Preview

    ⚡ SPARK

    The October 5 plan to drop NATS for S3 is now a usable preview, built on a new storage engine called WarpDrive. It caps a run of releases aimed at making Rivet cheaper to operate wherever it runs.

  5. 1mo ago

    Introducing agentOS 0.4 & Hosted VMs

    agentOS 0.4 lets developers create durable Hosted VMs by ID and drive them from RivetKit or plain HTTP, with scoped JWTs for direct client access. It fills in the sandbox half of the harness-in-backend, tools-in-sandbox split that Pi 1.0 and Pi Durable rely on.

  6. 1mo ago

    Introducing Pi Durable for Rivet

    Pi Durable runs inside a Rivet Actor and checkpoints every model request and tool call to SQLite, so runs finish through crashes and deploys. A week after Pi 1.0 hosting, it adds durability, the property that makes multi-hour agent runs practical on Rivet.