cross.stream

Local-first event streaming for building reactive workflows and automation.
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What's an event streaming store?

If you think of an "event" like a frame in a movie—a small package on a timeline—an event streaming store is a database designed to record these frames in strict order, append-only, so they can be replayed or reacted to later.

For example, you might append a frame every time a message is posted in a specific Discord channel. You can then .cat the stream to review all captured messages, and—if you're in a Nushell session—use pipelines to filter, aggregate, or process them with a CLI tool.

Quick Start

See the installation guide to get started.

Features

• Reactive Workflows: Build actors that automatically respond to events as they flow through the stream
• CLI Integration: Turn any command-line tool into a streaming component with services
• Nushell Native: First-class integration with Nushell for powerful data processing pipelines
• Real-time Streaming: Subscribe to live event feeds and build responsive applications
• Content Addressable: Efficient storage and deduplication of large payloads
• Local-first: Your data stays on your machine, no cloud dependencies required

Connect

Join our Discord to ask questions or share ideas.

Built with 🙏💚

• fjall: for indexing and metadata
• cacache: for content (CAS)
• hyper: provides an HTTP/1.1 API over a local Unix domain socket for subscriptions, etc.
• Nushell: for scripting and interop
• iroh: QUIC-based P2P transport for exposing and accessing streams