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Durable Streams ​

Persistent, addressable, real-time streams. For resilient AI sessions and ultra low-latency.

GitHub

What are Durable Streams? ​

Durable Streams provide reliable, resumable data streams for applications that need to survive network interruptions. They're designed for AI agents, collaborative applications, and any system that requires resilient real-time data flow.

Key features:

  • Resumable connections — automatically resume from the last known position after disconnection
  • Durable state — maintain session state across reconnections
  • AI SDK adapters — drop-in transport adapters for popular AI frameworks

Use cases ​

Durable Streams are ideal for:

  • AI agents that need to maintain context across network interruptions
  • Collaborative applications with multiple users and agents
  • Real-time dashboards that must not lose data
  • Multi-step agentic workflows that span long time periods

How it works ​

Durable Streams work alongside Postgres Sync and TanStack DB to provide a complete sync solution. While Postgres Sync handles structured data, Durable Streams handle event streams, AI responses, and session state.

Postgres Sync ────────────┐
(structured data)         │
                          ├───→ TanStack DB
Durable Streams ──────────┘     (reactive client DB)
(streams, AI, sessions)

Wrapper protocols ​

Durable Streams support multiple wrapper protocols for different use cases:

  • Binary streams — efficient binary encoding for high-throughput data
  • JSON mode — human-readable JSON for debugging and interoperability
  • Proxy — transparent proxy mode for existing SSE endpoints
  • Durable state — persisted session state with automatic recovery
  • TanStack AI — integration with TanStack Query for AI responses
  • Vercel AI SDK — drop-in transport adapter for Vercel AI SDK
  • Yjs — CRDT-based collaborative editing with Yjs

Announcing Hosted Durable Streams

Kyle Mathews

Hosted durable streams are live on Electric Cloud. You can now sync and stream AI sessions and low-latency real-time data alongside structured database changes.

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From fiction to reality, you can now build difficult things

Sam Willis

Four years ago, building a collaborative parametric CAD app was completely out of reach for a solo developer. I built one in a week, using the Electric stack and coding agents.

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Durable Sessions — the key pattern for collaborative AI

James Arthur

As the world moves to getting things done through agents, products need to combine AI with team-based collaboration. Durable Sessions are the best way to do that.

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Durable Streams 0.1.0 and State Protocol

Kyle Mathews

The first official npm release of Durable Streams, introducing the State Protocol for database-style sync semantics, improved conformance tests and community experiments.

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Announcing Durable Streams

Kyle Mathews

Introducing Durable Streams, an open protocol for persistent, addressable, real-time streams, based on a generalization of the battle-tested Electric sync protocol.

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Building AI apps? You need sync

Sam Willis

AI apps are collaborative. Building them requires solving resumability, interruptibility, multi‑tab, multi‑device and multi‑user.

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More information ​

See how you can combine Durable Streams with other Electric products to build resilient, collaborative AI apps.

GitHub