The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

Opensource Memory for Agents

The agent platform built on sync.

🐻 Bear necessities for state management in React

Essential building-blocks for functional & safe TypeScript code

The headless rich text editor framework for web artisans.

Turn a path string such as `/user/:name` into a regular expression

A collection of common interactive command line user interfaces.

Industry standard API mocking for JavaScript.

A declarative, efficient, and flexible JavaScript library for building user interfaces.

A state management library for React, heavily inspired by vuex

Open Source Metering and Usage Based Billing API ⭐️ Consumption tracking, Subscription management, Pricing iterations, Payment orchestration & Revenue analytics

useMatchMedia react hook for responsive components.

Consistency Made Simple

State machines, statecharts, and actors for complex logic

Workgroup for React 18 release.

The minimal javascript library to create flowcharts ✨

Authentication for the Web.

small, safe, and great commonmark (optionally gfm, mdx) compliant markdown parser

Remark plugin to compile Markdown as a slate 0.50+ compatible object.

✨ Monorepo for all the tooling which enables ESLint to support TypeScript

Wrapper for XD Nodes, Artboards and document to convert to json

A JavaScript template literal tag that parses GraphQL queries

A rules engine expressed in JSON

A curated list of awesome things related to Strapi

Property based testing framework for JavaScript (like QuickCheck) written in TypeScript

ESM-powered frontend build tool. Instant, lightweight, unbundled development. ✌️

⚡ Zero config GUI for Jest

Fix broken node modules instantly 🏃🏽‍♀️💨

⚡️ The Missing Fullstack Toolkit for Next.js