Vercel Labs

The open agent skills ecosystem

AI Helpers

The Vercel AI SDK is **a library for building AI-powered streaming text and chat UIs**.

A full-featured, hackable Next.js AI chatbot built by Vercel Labs 

A simulated bash environment with virtual filesystem

Fetch source code for npm packages to give coding agents deeper context

AI-powered development tools with browser monitoring and skill integration

Minimal terminal AI assistant.

Simple before/after screenshot tool for capturing and comparing web pages

Headed Playwright browser with React DevTools pre-loaded

A security-focused rehype plugin that filters URLs based on allowed prefixes

WebSocket transport for the AI SDK OpenAI provider — drop-in fetch replacement that routes streaming requests through a persistent WebSocket connection.

Snapshotable JavaScript runtime via WebAssembly. QuickJS-NG compiled to WASM with snapshot/restore support.

eve extension that gives agents a full browser automation tool set backed by agent-browser

Helpers for running agent-browser inside sandbox runtimes

WebSocket transport for the AI SDK OpenAI provider — drop-in fetch replacement that routes streaming requests through a persistent WebSocket connection.

S3, SQS, Cognito, IAM, and STS emulation with AWS SDK-compatible S3 paths, JSON SQS/Cognito endpoints, and XML Query IAM/STS endpoints. S3 uploads and downloads preserve arbitrary binary payloads, including raw byte lengths and ETags. Responses use the co

Sign in with Apple emulation with authorization code flow, PKCE support, RS256 ID tokens, and OIDC discovery.

Microsoft Entra ID (Azure AD) v2.0 OAuth 2.0 and OpenID Connect emulation with authorization code flow, PKCE, client credentials, client-bound refresh tokens, RS256 ID tokens, and OIDC discovery.

Google OAuth 2.0, OpenID Connect, and mutable Google Workspace-style surfaces for local Gmail, Calendar, and Drive flows.

Fully stateful Slack Web API emulation with channels, messages, threads, reactions, user profiles, presence, modern file uploads, pins, bookmarks, views, OAuth v2, and incoming webhooks. Chat writes preserve common rich message fields such as `blocks`, `a

Stateful Linear GraphQL API emulator for local development and CI.

Resend email API emulation with email sending, domain management, API keys, audiences, contacts, and a local inbox for captured messages.

Twilio API emulator for local development and CI. Part of [emulate](https://github.com/vercel-labs/emulate).

Stripe API emulation with customers, payment methods, customer sessions, payment intents, charges, products, prices, and checkout sessions. Includes a hosted checkout page and webhook delivery.

GitHub tools for eve, distributed as a mountable eve extension (https://eve.dev/docs/extensions)

Pre-built directives for @json-render/core — $format, $math, $concat, $count, $truncate, $pluralize, $join, and $t (i18n).

YAML wire format for @json-render/core. Progressive rendering and surgical edits via streaming YAML.

React PDF renderer for @json-render/core. JSON becomes PDF documents.

React Email renderer for @json-render/core. JSON becomes HTML emails.

Ink terminal renderer for @json-render/core. JSON becomes terminal UIs.

konsistent is a CLI tool that enforces structural conventions in TypeScript codebases.

Pinned LLVM code-generation helper for scriptc on Linux x64

Statically linked LLVM code-generation helper for scriptc on Linux x64 musl

Pinned LLVM code-generation helper for scriptc on Linux arm64

Pinned LLVM code-generation helper for scriptc on Windows x64

Statically linked LLVM code-generation helper for scriptc on Linux arm64 musl

Pinned LLVM code-generation helper for scriptc on macOS x64

The open agent skills ecosystem

Mock GPU adapter for testing vgpu code without real WebGPU hardware.

Public VGPU API entrypoint scaffold for browser, Node, mock, scene, and client typing surfaces.

Pure WGSL utility snippets for vgpu shaders.

Headless terminal emulator core for the web — WASM bridge and WebSocket transport

DOM renderer, input handler, and orchestrator for wterm