Evaluate your LLM-powered apps with TypeScript

Public repository for Skills

coss.com is the new holding company of cal.com, the pioneers of open source scheduling infrastructure and cal.com continues to be the 'google search' of our alphabet.

The best ChatGPT that $100 can buy.

Essential utilities for building production-ready AI applications with Vercel AI SDK. State management, debugging, structured streaming, intelligent agents, and caching.

Example apps for the Apps SDK

Multi-agent AI coding platform powered by Vercel Sandbox and AI Gateway

Open-source implementation of Imagine with Claude

Chrome DevTools for coding agents

AI Elements is a component library and custom registry built on top of shadcn/ui to help you build AI-native applications faster.

💫 Toolkit to help you get started with Spec-Driven Development

Captures your web app's complete development timeline - server logs, browser events, console messages, network requests, and automatic screenshots - in a unified, timestamped feed for AI debugging.

Type-safe search params state manager for React frameworks - Like useState, but stored in the URL query string.

AGENTS.md — a simple, open format for guiding coding agents

A drop-in replacement for react-markdown, designed for AI-powered streaming.

Bidirectional Channels for JavaScript

gpt-oss-120b and gpt-oss-20b are two open-weight language models by OpenAI

An open-source database of AI models.

Develop. Preview. Ship.

The most comprehensive authentication framework for TypeScript

Neon: Serverless Postgres. We separated storage and compute to offer autoscaling, code-like database branching, and scale to zero.

TypeScript library for using in-browser AI models with the Vercel AI SDK, with support for seamless fallback to server-side models

Repair invalid JSON documents

Use Claude Code as the foundation for coding infrastructure, allowing you to decide how to interact with the model while enjoying updates from Anthropic.

A CLI tool for analyzing Claude Code/Codex CLI usage from local JSONL files.

Run Claude Code, Gemini, Codex — or any coding agent — in a clean, isolated sandbox with sensitive data redaction and observability baked in.

Copy-paste Liquid Glass shader with SVG

🌼 🌼 🌼 🌼 🌼  The most popular, free and open-source Tailwind CSS component library

Get started with building Fullstack Agents using Gemini 2.5 and LangGraph