/**
 * Frontmatter parsing and serialization for Obsidian markdown notes.
 *
 * Uses gray-matter for YAML frontmatter extraction.
 * Handles malformed frontmatter gracefully — never crashes, always recovers.
 */
export interface ParsedNote {
    /** YAML frontmatter as a plain object */
    frontmatter: Record<string, unknown>;
    /** Note body (markdown content after frontmatter) */
    content: string;
    /** Whether the note had valid frontmatter */
    hasFrontmatter: boolean;
    /** Tags extracted from frontmatter and inline #tags */
    tags: string[];
}
/**
 * Parse a raw note string into frontmatter + content.
 * Gracefully handles missing or malformed frontmatter.
 */
export declare function parseNote(raw: string): ParsedNote;
/**
 * Serialize frontmatter and content back into a raw note string.
 */
export declare function serializeNote(frontmatter: Record<string, unknown>, content: string): string;
/**
 * Add tags to a note's frontmatter (deduplicates).
 * Returns the updated frontmatter object.
 */
export declare function addTags(frontmatter: Record<string, unknown>, newTags: string[]): Record<string, unknown>;
/**
 * Remove tags from a note's frontmatter.
 * Returns the updated frontmatter object.
 */
export declare function removeTags(frontmatter: Record<string, unknown>, tagsToRemove: string[]): Record<string, unknown>;
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