Schemd: A lightweight text-to-SVG compiler for circuits and UML diagrams

Schemd is a zero-dependency npm package that compiles a simple text format into accessible SVG diagrams, supporting circuit components and UML types like class and sequence diagrams. The compiler runs server-side or during builds, producing deterministic inline SVG with a hard 20 KiB gzip budget. Current build is around 18 KiB with 100% code coverage enforced.