Module builtin 

Structs

AutolinkHeadings

Wrap each Heading’s children in a Link to its own #id anchor. aria_label flows through as the link’s title.

BareUrlAutolink

Wrap bare http(s)://... substrings in Text nodes with synthesised Link nodes. Scans Paragraph, Heading, and inline emphasis containers.

CodeImport

Resolve file=path[{ranges}] directives in fenced code-block info strings, replacing the block’s body with the file contents (optionally sliced by 1-based line ranges).

ComponentPreview

Replace <ComponentPreview name="X" /> with a CodeBlock carrying the source of registry component X. registry_index is the JSON manifest; registry_root is the directory referenced paths resolve against.

ComponentSource

Replace <ComponentSource path="..." /> with a CodeBlock carrying the file contents (resolved against base_dir). lang comes from the file extension. Path resolution mirrors [CodeImport].

CopyLinkedFiles

Copy referenced asset files (image srcs and relative hrefs) into assets_dir, hash-name them via name_template, and rewrite the AST node to point at the published URL under base_url. map caches raw -> url so repeated references hash the file only once.

DisableGfm

Serialise GFM-only constructs back to plain markdown. ~~strike~~ becomes literal text, tables flatten to pipe-delimited text, task list items lose their checkbox state and become plain list items.

Emoji

Math

Render $...$ and $$...$$ math spans to MathML.

Mermaid

Render mermaid code blocks to inline SVG via the external mmdc CLI (@mermaid-js/mermaid-cli). On success the CodeBlock is replaced with <MermaidSvg svg="..." />. No-ops with Code::MmdcUnavailable when the CLI is missing; per-block failures emit Code::MermaidRenderFailed.

NpmCommand

Detect npm install ..., npx create-..., and npx ... first-lines in fenced code blocks and replace them with a <PackageManagerTabs> JSX element carrying the equivalent yarn/pnpm/bun invocations.