Reflex

Reflex is a deterministic reactive runtime for building systems with explicit dataflow, scheduling, and ownership.

It is not a UI framework first. The runtime can power UI, simulation, orchestration, server workflows, and other reactive systems where control over execution matters.

Packages

@reflex/core

Low-level reactive primitives and graph/ownership mechanics.

• ownership model
• reactive graph operations
• scheduling-independent core logic

@reflex/runtime

Runtime layer built on top of @reflex/core.

• connected runtime behavior
• reactive execution helpers
• scheduler-oriented runtime APIs

@reflex/reactive

Public application-facing facade.

• signal
• computed
• memo
• effect
• flush
• batchWrite
• createRuntime

Recommended Entry Point

For application code, start with @reflex/reactive.

import { signal, computed, effect, flush } from "@reflex/reactive";

const count = signal(0);
const double = computed(() => count.read() * 2);

effect(() => {
  console.log(count.read(), double());
});

count.write(5);
flush();

Architecture

The repository is currently organized around three active layers:

1. @reflex/core
2. @reflex/runtime
3. @reflex/reactive

There is also a DOM adapter in the repository as reflex-dom.

Philosophy

• explicit runtime behavior over hidden scheduling
• deterministic execution over convenience magic
• clear layering between core logic and application-facing API

License

MIT