/** Safe Markdown document grammar shared with Chat. Source never becomes HTML. */
export interface MarkdownBlock {
    kind: "paragraph" | "heading" | "code" | "quote" | "list" | "table" | "rule";
    text: string;
    marker?: string;
    level?: number;
    indent?: number;
    checked?: boolean;
    columns?: string[];
    rows?: string[][];
}
export declare function markdownBlocks(source: string): MarkdownBlock[];
export interface MarkdownRun {
    text: string;
    strong?: boolean;
    emphasis?: boolean;
    code?: boolean;
}
export declare function markdownRuns(source: string): MarkdownRun[];
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