Geek Labs

Sep 11, 2026 · Artificial Intelligence

Vercel's fx: A 7.8 MiB Embeddable Coding Agent Kernel Built with Zig

Vercel Labs' fx is a 7.8 MiB Zig-compiled coding agent kernel that runs as a CLI, connects to editors via ACP, and embeds into JavaScript apps via WebAssembly, offering model-agnostic design, fine-grained permissions, automatic session compression, and 40× faster initialization than prior versions.