Best open-source TypeScript projects

A self-hosted personal AI assistant that runs on your own devices and answers you through chat apps like WhatsApp, Telegram, Slack, and Discord.

An MCP server that lets AI agents reverse engineer native binaries, JavaScript/Electron apps, .NET assemblies, websites and more, with evidence for each finding.

An open-source agent harness from DeepSeek AI built on an everything-is-a-plugin architecture, run via a Web UI.

A local-first, open-source AI design agent workspace where teams create prototypes, websites, decks, images and videos with coding agents.

Turns a codebase or LLM wiki into an interactive knowledge graph you can browse, search, and query from AI coding tools.

A spec-driven development workflow for AI coding assistants that agrees on proposals, specs, and tasks before any code is written.

An open-source framework that turns HTML, CSS, media and seekable animations into deterministic MP4 videos, built for AI coding agents.

Open-source, self-hostable backend platform for building apps, offering Auth, Databases, Storage, Functions, Messaging, Realtime, Hosting and MCP access for agents.

An open-source framework for building universal native apps with React that run on Android, iOS, and the web.

Open-source AI platform that turns any topic or document into an interactive classroom with AI teachers and classmates.

Multi-agent orchestration layer for Claude Code that coordinates specialized agents, team pipelines, and parallel execution from a terminal CLI or in-session skills.

All-in-one OSINT web app that runs on-demand checks on any website, covering DNS, SSL, headers, server info, and security configuration.

A mobile, web and CLI front end for running Claude Code and Codex sessions from your phone, with end-to-end encrypted sync between devices.

Local proxy that lets OpenAI Codex and Claude Code run on any LLM provider, including Claude, Gemini, Grok, DeepSeek, and Ollama.

An open-source headless CMS for Markdown, MDX, JSON and YAML content, with a GraphQL API and optional live visual editing.

A Claude Code and Codex agent skill that builds cinematic product promo videos in Remotion from your own screenshots and copy.

TypeScript library that renders Mermaid diagrams to themeable SVG or ASCII/Unicode text, synchronously and with zero DOM dependencies.

An end-to-end testing framework for web and mobile apps that lets you describe test goals in natural language and drive the app with an agent.

A CLI and TypeScript SDK from OpenAI for scanning code for security vulnerabilities, validating findings, and generating fixes.

Open-source desktop app to download video and audio from 1000+ sites, transcribe locally, and run AI summaries or Q&A on transcripts.