A retro terminal interface for the Claude AI API. Built entirely with vanilla HTML, CSS, and JavaScript — no frameworks, no build tools. Features a CRT scanline overlay, phosphor glow effects, typewriter response rendering, and full multi-turn conversation history. Every interaction feels like jacking into something real.

ARC REACTOR HUD is one of six operational interfaces in the 1978.IO system — each a fully functional site built in vanilla HTML, CSS, and JavaScript. No frameworks detected. No build tools. Six different aesthetics, same engineering discipline.