Posts tagged philosophy

Essay · 8 min

Eve validates the shape. Now pick your runtime.

Vercel's eve and B4.run both structure agents as directories; compare their runtimes, deployment models, channels, sandboxing, and tooling.

Jun 18, 2026

Essay · 6 min

The App Router for AI Agents

File-system routes, type-safe tools, and the capability layer B4.run adds around real LangGraph.js agent applications.

May 19, 2026

Essay · 7 min

Why we built B4.run

B4.run is a TypeScript-first framework for building LangGraph.js agents with file-system routes, route-local tools, generated types, and a local dev loop.

May 12, 2026

Start building.

Scaffold a B4.run app, open the example, and see whether the shape fits your team in under five minutes.

$ npm create b4-app@latest my-agent

Star on GitHub