Vercel Open-Sources fx, a Tiny Zig Coding Agent

Vercel has open-sourced fx, a minimalist Apache-2.0 coding agent harness and CLI written in Zig with a 6 MiB binary. The v0.0.15 update improves long sessions, cuts memory use by 70%, and can even run in a phone browser.

2026-10-29 ~ 2026-10-30 · 2 related posts

• Vercel's open-source Zig coding agent fx ships v0.0.15 with 70% less memory, 6.15 MiB binary — evilrabbit_ · 2026-10-29
• fx: A 6 MiB Zig-Native Open-Source Coding Agent That Runs in the Browser — cramforce · 2026-10-30