# Cereb

> Lightweight reactive stream library for user input modeling and orchestration.
> Mouse, touch, pen—unified into composable stream pipelines.

## Packages

- cereb: Core library with stream primitives and operators
- @cereb/pan: Pan/drag/swipe gesture recognition
- @cereb/pinch: Pinch/zoom gesture recognition

## Getting Started

- [Quick Start](https://cereb.dev/getting-started/quick-start): Installation and first gesture

## Core Concepts

- [Key Models](https://cereb.dev/core-concepts/key-models): Signal, Stream, Operator fundamentals
- [Creating Operators](https://cereb.dev/core-concepts/creating-operators): Build custom operators
- [The Problems Solved](https://cereb.dev/core-concepts/the-problem-solves): Why use Cereb

## Stream API

- [singlePointer](https://cereb.dev/stream-api/single-pointer): Unified pointer input (mouse/touch/pen)
- [multiPointer](https://cereb.dev/stream-api/multi-pointer): Multi-touch tracking
- [pan](https://cereb.dev/stream-api/pan): Pan gesture with velocity/direction
- [pinch](https://cereb.dev/stream-api/pinch): Two-finger pinch/zoom
- [keyboard](https://cereb.dev/stream-api/keyboard): Keyboard events
- [keydown](https://cereb.dev/stream-api/keydown): Keydown only
- [keyheld](https://cereb.dev/stream-api/keyheld): Key hold state tracking
- [wheel](https://cereb.dev/stream-api/wheel): Scroll wheel events
- [domEvent](https://cereb.dev/stream-api/dom-event): Low-level DOM event wrapper

## Operator API

- [filter](https://cereb.dev/operator-api/filter): Filter by predicate
- [map](https://cereb.dev/operator-api/map): Transform signals
- [extend](https://cereb.dev/operator-api/extend): Add properties to signal value
- [session](https://cereb.dev/operator-api/session): Group start-to-end as session
- [offset](https://cereb.dev/operator-api/offset): Element-relative coordinates
- [zoom](https://cereb.dev/operator-api/zoom): Bounded scale calculation
- [when](https://cereb.dev/operator-api/when): Gate by another stream's state
- [throttle](https://cereb.dev/operator-api/throttle): Rate limiting
- [debounce](https://cereb.dev/operator-api/debounce): Wait for silence
- [spy](https://cereb.dev/operator-api/spy): Side effects (also: tap)
- [share](https://cereb.dev/operator-api/share): Multicast to subscribers
- [merge](https://cereb.dev/operator-api/merge): Combine streams
- [compose](https://cereb.dev/operator-api/compose): Reusable operator pipelines
- [reduce](https://cereb.dev/operator-api/reduce): Accumulate state

## Examples

- [Signature Pad](https://cereb.dev/examples/signature-pad): Drawing with pointer tracking
- [Space Adventure](https://cereb.dev/examples/space-adventure): Interactive game demo

## Full Documentation

- [llms-full.txt](https://cereb.dev/llms-full.txt): Complete documentation in single file (AI-optimized)

## Links

- GitHub: https://github.com/niceplugin/cereb
- npm: https://www.npmjs.com/package/cereb