arrow-js

Why we included this project

ArrowJS is a reactive UI runtime built on plain JavaScript modules, template literals, and the DOM, so there is no build step, no JSX compilation, and no framework-specific idioms for an agent to learn. The project claims the whole API fits in a small fraction of a 200k-token context, which is what draws teams building agent-driven interfaces to it. The most interesting piece is a WASM-backed sandbox that runs component logic off the host window while still rendering into the real DOM, so chat agents can generate on-demand UIs without iframes or pre-planned components. With core you get direct reactive DOM updates and a minimal API surface, and optional SSR and hydration packages extend the same component model when you need server output. For small teams that want a lightweight, agent-friendly alternative to heavier component frameworks, this is a sensible pick.