Mermaid, rendered without a browser

SebastianJS renders mermaid diagrams to SVG in plain Node — no headless Chrome, no native build step. Every diagram below is rendered twice and shown side by side, so you can judge the difference yourself.

Both sides run mermaid 11.9.0. The reference pane is real mermaid-cli output produced at build time, not a CDN copy of mermaid drawing in your browser — otherwise the comparison would measure a version difference rather than a rendering difference.