What I use.

Primary development interface — autonomous coding agent

Powers all three autonomous agents

Custom tool servers for GitHub, Vercel, file system, and more

Portable, composable agent capabilities

Primary language for all projects

React framework for web applications

Runtime for servers and tooling

Utility-first styling

Component library

CI/CD pipeline orchestration

Bare-metal GitHub Actions runners — 2x faster builds

AI-powered pipeline optimization

Deployment platform

Containerization for agent environments

AI-native E2E testing — tests written in plain English

Browser automation and E2E testing

Component and integration testing

Version control and collaboration

Fast, disk-efficient package manager

Type-safe database ORM

Primary database