Flatten Mermaid label markup without interpreting it.

Keep top-level syntax positions and blank quoted/bracketed content.

Decompress without allowing a small payload to expand without bound.

Undo draw.io's base64 + raw-deflate + URL-encoding pipeline.

Keep white; turn everything else into currentColor.

Reject declarations that can make XML parsing expand external data.

Drop Mermaid's `:::class` attachment; source styling is discarded.

Return exact families from an approved Google Fonts css2 stylesheet.

Return a platform-stable representation of an inline controller.

True when the boxes stack as lanes — shared left edge or shared top edge.

Return the last line index of a leading `---` frontmatter block, or -1.

Join multiline Mermaid strings before parsing semicolon statements.

Normalize Mermaid v11.3+ ``@{ ... }`` node attributes. Only semantic label/shape data crosses the trust boundary. Image URLs, registered icon

Pull the ``mxfile`` tEXt/zTXt chunk out of a draw.io-exported PNG.

Return whether quotes and node delimiters close within a statement.

Hash the one reviewed controller shipped by the motion template.

Return the normalized Mermaid shape family for a node suffix.

draw.io labels are often HTML fragments; flatten to plain text lines.

Return balanced bodies for CSS at-rules whose headers match a pattern.