Show HN: I built a declarative layout engine for SVG, Canvas, WebGL

I built a tiny zero DOM layout engine for vector graphics and custom renderers to resolves nested rows/cols/grids into exact `{x, y, w, h}` boxes, with text measurement, overflow signals, and collision separation.

This is to help make SVG, PDF, Canvas responsive.

Feedback welcome from anyone building canvas/SVG diagrams, dashboards, node editors, or diagram tools.