ZIG

fx is Vercel Labs' experimental coding agent written in Zig: a roughly 6 MiB native binary built to be embedded anywhere from CI sandboxes to the browser. We read the source, the docs, and the launch thread so you can decide fast.

Zig core team member mlugg published the definitive deep-dive on how Zig's incremental compilation works - file pipeline, semantic analysis, dependency tracking, and a custom incremental linker. 244 HN points and a rare steveklabnik endorsement.

Richard Feldman's team rewrote the Roc compiler from Rust to Zig in 487 days. The memory safety numbers challenge assumptions, and the 35ms incremental rebuilds are real. Here's the full breakdown.

Andrew Kelley's blunt response to Anthropic's AI-assisted Bun rewrite sparked debate about AI marketing, language choices, and what makes engineering decisions honest.

The HashiCorp co-founder explains why he chose Zig over Rust for Ghostty, the technical challenges of terminal emulator development, and what systems programming looks like in 2026.

Terminal emulator built in Zig with platform-native UI and GPU acceleration. 2ms key-to-screen latency. Metal on macOS, Vulkan/OpenGL on Linux. By the co-founder of HashiCorp.