Let coding agents diagnose and fix your React code

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

A curated list of awesome Claude Skills, resources, and tools for customizing Claude AI workflows

Monorepo for the new version of ESLint

Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all

QuestPDF is a modern library for PDF document generation. Its fluent C# API lets you design complex layouts with clean, readable code. Create documents using a flexible, component-based approach.

Basic operations on iterables

Bidirectional Channels for JavaScript

A source code generator for automatically implementing IEquatable<T> using only attributes.

surfacing defects at compile time and preventing issues that would otherwise go unnoticed

The best design tools and plugins for everything 👉

A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools and more.

Collection of utility types, complementing TypeScript built-in mapped types and aliases (think "lodash" for static types).

Home of .NET's Virtual Monolithic Repository which includes all the code needed to build the .NET SDK.

Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API.

f.k.a. Awesome ChatGPT Prompts. Share, discover, and collect prompts from the community. Free and open source — self-host for your organization with complete privacy.

Benchmarking LINQ and alternative implementations

Automated auditing, performance metrics, and best practices for the web.

🍼 Plugin driven WYSIWYG markdown editor framework.

A set of beautifully-designed, accessible components and a code distribution platform. Works with your favorite frameworks. Open Source. Open Code.

Exceptionless clients for the .NET platform

Roslynator is a set of code analysis tools for C#, powered by Roslyn.

Source Generator based Embedded Typed Readonly In-Memory Document Database for .NET and Unity.

JavaScript implementation of Google's Snappy compression library

Zero encoding extreme performance binary serializer for C# and Unity.

The micro-library of Node.js stream components for creating custom JSON processing pipelines with a minimal memory footprint. It can parse JSON files far exceeding available memory streaming indivi…

TypeScript Remove (tsr) is a utility that removes unused code from TypeScript projects – It's like tree shaking, but for source files

Zero allocation LINQ with LINQ to Span, LINQ to SIMD, and LINQ to Tree (FileSystem, JSON, GameObject, etc.) for all .NET platforms and Unity, Godot.

👾 A cli tool to install all your @types/<any> files into your devDependencies!

Using a library in your webpack project? Here’s how to optimize it