Bolt is a full-stack AI development environment built on StackBlitz's WebContainers technology, enabling in-browser code execution without a local setup. It features an intelligent agent routing system — Bolt Agent — that automatically selects the optimal AI model (Standard or Max/Pro tiers) for each task, balancing quality and token cost. The platform includes advanced context management capable of handling projects 1,000× larger than previous iterations, and integrates with Figma imports and team design systems (Material UI, Chakra UI, Shadcn, Washington Post Design System, and more). Bolt Cloud provides enterprise-grade backend infrastructure including unlimited databases, user management/authentication, hosting with analytics, custom domains, and day-one SEO optimization — all within a single interface.