RivetKit

Lightweight Libraries for Backends
Install one package & connect your backend of choice.
Just a library, no SaaS.

[RivetKit @RivetKit_org]

Get started: https://t.co/dYcPXHOoYZ

[Rivet @rivet_dev]

Open-Source SaaS is dead. The future is libraries. Today we are introducing @RivetKit_org – backend libraries to replace SaaS.

[Nathan Flurry 🔩 @NathanFlurry]

Launching @RivetKit_org v0.9, a complete re-architecture of ActorCore:

A lightweight actor library that integrates in 1 line of code & runs anywhere.

→ Any router (Hono/Elysia/tRPC)
→ Any platform (Rivet/CF/Redis)
→ Any client (JS/Bun/React/Rust)
→ 2.5 mo of work & 111 PR

[RivetKit @RivetKit_org]

🔐 Good things are coming

[Nathan Flurry 🔩 @NathanFlurry]

The @better_auth integration in @RivetKit_org turned out very clean 🧼

One again: Libraries > SaaS

Integration guide below 🧵

[Nathan Flurry 🔩 @NathanFlurry]

For @RivetKit_org v0.9 (formerly ActorCore) we're doubling down on building a lightweight library that runs anywhere

The goal: bring Durable Objects benefits to any cloud provider. Just a library, no SaaS.

Here's how it runs on memory, Redis, Postgres, Rivet, and Cloudflare ⬇️

[Nathan Flurry 🔩 @NathanFlurry]

👉👈 Say hello to @Linear Coding Agent

Built with @ActorCore_org Agents × @Vercel AI SDK

I couldn't wait for this launch, so I hacked together a little something in an evening. I honestly don't believe I could've ship it this fast without Actors.

Source code below ⬇️

[Nathan Flurry 🔩 @NathanFlurry]

You can access a REPL for Durable Objects right now with @ActorCore_org and the Studio:

studio (dot) rivet (dot) gg

What debugging tools would you like to see for Durable Objects & Rivet Actors?

[Nathan Flurry 🔩 @NathanFlurry]

I'll do you one better: 📧 @Resend ⨯ @ActorCore_org (open-source Cloudflare Durable Objects & Agents)

This combo makes complicated email patterns dead simple. Examples include streaks, customer engagement, agentic workflows, and monitoring.

Streaks example code & documentation below ⬇️

[Rivet @rivet_dev]

Just dropped:
@Resend ⨯
@ActorCore_org (open-source Durable Objects)

Ship streaks, reminders, engagement loops, and agent workflows.

docs + code below 👇

[Nathan Flurry 🔩 @NathanFlurry]

Announcing: 🎨 Rivet Studio v1.0

A powerful development environment for @rivet_gg Actors & @CloudflareDev Durable Objects for realtime apps.

🧠 View/edit actor state
📞 Test RPCs like Postman
🔍 Explore live connections
🔥 Hot reload everything

→ studio (dot) rivet (dot) gg

[Nathan Flurry 🔩 @NathanFlurry]

🐙 Highlighting some recent recent contributions to @ActorCore_org (the stateful, scalable, realtime framework)

✅ @Zephraph massively improved scheduling API
✅ @prathamdby supercharged landing page
✅ @j0g1t React useActor
✅ @samk0_com fixing redis bugs

[Nathan Flurry 🔩 @NathanFlurry]

We're making building realtime, stateful applications incredibly easy with `useActor` for @reactjs.

More details on @ActorCore_org in thread 🧵

[Nathan Flurry 🔩 @NathanFlurry]

🧪 Just dropped @ActorCore_org v0.7.6 with @vitest_dev integration for unit testing.

Easily test complicated stateful, realtime backends with just `setupTest(app)`.

Docs and changelog below 🧵

[Nathan Flurry 🔩 @NathanFlurry]

🎭 @ActorCore_org 0.7.5 is the first update shipped with purely external contributors

Now supports accessing platform-specific context (thanks @Zephraph) and fixes a series of docs/example fixes (thanks @ConnorAds)

Changelog below 🧵

[Nathan Flurry 🔩 @NathanFlurry]

📝 Ask and ye shall receive 5,041 words

This proposal may be a bit of a reach, leaning in to a simpler Web Workers- & PartyKit-esque pattern rather than the DO- & Rivet-esque fetch pattern. Would love thoughts, and please clarify anything I missed.

Link below ⬇️

[Nathan Flurry 🔩 @NathanFlurry]

this @ActorCore_org integrations list is starting to get pretty long...

[Nathan Flurry 🔩 @NathanFlurry]

One of the biggest Durable Objects misconceptions: Durable Objects ≠ Durable Properties

When your DO restarts/sleeps, poof – your in-memory data is gone 💀

ActorCore 0.7.2 adds `vars` to make this clear:
- state = persisted
- vars = ephemeral

changelog & source code below 🧵

[Nathan Flurry 🔩 @NathanFlurry]

📝 new docs & landing page for @rivet_gg

with ActorCore's launch, we're making a clearer distinction between Rivet (infra) and ActorCore (framework).

would love your thoughts!

[Nathan Flurry 🔩 @NathanFlurry]

github: https://t.co/QpMBNeGyhd
docs: https://t.co/miItOI04zr