/**
 * Island segmentation for [PAGE] bodies.
 *
 * A page body is markdown prose interleaved with Svelte "islands" — component
 * tags, HTML sections, and template blocks like {#snippet}…{/snippet}. Markdown
 * tooling (the renderer, prettier) must never look inside an island: markdown's
 * paragraph and HTML-block rules split Svelte structure apart (a snippet opened
 * inside a <p> and closed outside fails to compile; a blank line cuts a <div>
 * section in half; a formatter re-indents block lines it can't understand).
 *
 * The rule an author sees: a line that starts a Svelte block ({#…}, {@render …})
 * or an HTML/component tag, sitting at the start of a markdown block (preceded
 * by a blank line or the body edge), begins an island. The island runs until
 * its Svelte blocks and HTML tags are balanced — blank lines inside are part of
 * the island. Everything else is prose.
 */
export interface PageSegment {
    kind: 'prose' | 'island';
    /** Verbatim lines of the segment */
    lines: string[];
}
/** Split a page body into prose and island segments. Lines inside markdown
 * code fences are always prose — a component tag shown in a fence must stay
 * displayed code, never a live island. */
export declare function segmentPageBody(body: string): PageSegment[];