/**
 * Skill Differ Module
 * Compare two skills side-by-side with section-aware diffing.
 */
export interface SectionDiff {
    /** Section heading */
    heading: string;
    /** Lines added in B */
    linesAdded: number;
    /** Lines removed from A */
    linesRemoved: number;
    /** Unified diff preview */
    preview: string;
}
export interface DiffResult {
    /** Skill A name */
    skillA: string;
    /** Skill B name */
    skillB: string;
    /** Sections only in B */
    added: string[];
    /** Sections only in A */
    removed: string[];
    /** Changed sections */
    changed: SectionDiff[];
    /** Unchanged sections */
    unchanged: string[];
    /** Token count difference (positive = B is larger) */
    tokenDelta: number;
    /** Total lines in A */
    linesA: number;
    /** Total lines in B */
    linesB: number;
}
/**
 * Compare two skills and produce a diff result.
 *
 * @param pathA — path to first skill directory or SKILL.md
 * @param pathB — path to second skill directory or SKILL.md
 */
export declare function diffSkills(pathA: string, pathB: string): Promise<DiffResult>;
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