## Houston Engine Design Guide

The working source of truth for how the Houston engine works today and which future changes are proposed.

Open `index.html` in any browser. Self-contained: dark theme, presentable as-is. Each chapter has a status pill so you can see what is shipped, partial, proposed, or gated.

This document is the working design. Edit it as decisions get made. New deep-dives go in this directory as separate HTML or markdown files; `index.html` stays the readable, presentation-ready overview.
