Extracting metadata

Use this when the user wants structured metadata out of HTML rather than (or in addition to) the Markdown body — page title, description, language, Open Graph tags, structured data, the heading outline, links, or image references.

Metadata lives in result.metadata and is surfaced on the CLI through --json. Metadata is extracted by default; all sub-fields below populate automatically inside result.metadata whenever --json is used. There are no per-field extraction flags.