Code declaratively,
compute continuously

Skip lets you build streaming services where you don’t worry about
From the creators of the Hack and Skip programming languages at Meta
Introduction

How Skip works

Clients
Application logic
Skip runtime
Ext. services
Skip is an open source framework first developed at Meta to build & run services where state updates incrementally.
  • Resource manager
    Data sources are streamed or polled selectively based on client needs.
  • The Skip runtime
    Manages your objects in a transactional heap guaranteeing immutability and correctness so services can recompute only what has changed.
  • The Skip API
    Provides a simple declaritive “init time” programming model ensuring programs are effect-free and replayable.
  • Clients
    Views are continually kept up to date with the latest data and state changes.
Where to use Skip

Real-time features

Skip lets you build real-time features without the complexity of programming streams or the cost of excessive recomputing.

It has a declarative point-in-time programming model that removes the challenges of programming streams.

Its incremental runtime only triggers recomputation for the data that has changed.

Client app
Backend service

Features

Open source
100% MIT licensed
Real-time
Generate simple, reliable real-time API's for web & mobile clients
Simple
No async complexity
Familiar
JSON & TypeScript
Flexible
Work with batch data, streaming data or mix of the two
Resilient
Transparent state management and failure handling
Lightweight
Runs locally with no server to manage
Reusable
Reuse the services you build with mirroring
How to use Skip

Developer experience

  • Import services, streams, and databases as collections
  • Write simple TypeScript map functions against collections
  • Compose more complex logic with reuse
  • Clients subscribe to real-time updates over http
Stories from our community
  • React has dramatically simplified the way we write front-end code by coming up with a different way to deal with state updates. Skip is finally doing the same for the backend!
    Christopher Chedeau (Vjeux)

    Principal Software Engineer at Meta

    co-creator of React Native and Prettier

  • Skip is like streaming without the streams!
    Armand Joulin

    Research Director at Google

    lead of Gemma AI models

  • Reactive programming done right!
    Jan Vitek

    Dir. of Language Theory, Epic Games

    Prof. of Computer Science, Khoury

Skip roadmap, What’s next
Star our GitHub repository and follow along for the latest updates
Explore the Code
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