/**
 * Skeleton Extractor — High-speed AST-based file outline and body reduction.
 *
 * Strips function, method, and class implementations while preserving
 * signatures, type definitions, imports, and docstrings. Achieves 70–90%
 * token reduction for LLM context injection and repository understanding.
 */
import type { SymbolLang } from './schema.js';
export interface SkeletonSymbolRange {
    name?: string | undefined;
    kind?: string | undefined;
    startLine: number;
    endLine: number;
    bodyStartLine?: number | undefined;
    bodyEndLine?: number | undefined;
}
export interface SkeletonOptions {
    /** Keep JSDoc / docstring comments. Defaults to true. */
    includeDocs?: boolean | undefined;
    /** Collapse multi-line import blocks into a single summary line. Defaults to false. */
    collapseImports?: boolean | undefined;
    /** Keep only exported / public declarations. Defaults to false. */
    exportsOnly?: boolean | undefined;
    /** Include original start-end line numbers in stripped block comments (e.g. L32-L45). Defaults to true. */
    includeLineNumbers?: boolean | undefined;
    /** Maximum recursion depth for nested scopes. */
    maxDepth?: number | undefined;
}
export interface FileSkeletonResult {
    file: string;
    lang: SymbolLang;
    skeleton: string;
    symbols?: SkeletonSymbolRange[] | undefined;
    stats: {
        originalLines: number;
        skeletonLines: number;
        tokenSavingsPercent: number;
        symbolCount: number;
    };
}
/**
 * Extract an AST-based skeleton from a file's content.
 */
export declare function extractFileSkeleton(opts: {
    file: string;
    content: string;
    lang?: SymbolLang;
    options?: SkeletonOptions;
}): Promise<FileSkeletonResult>;
/**
 * Extract skeletons for all indexable files under a directory.
 */
export declare function extractDirectorySkeleton(opts: {
    dirPath: string;
    maxFiles?: number;
    options?: SkeletonOptions;
}): Promise<{
    files: FileSkeletonResult[];
    combinedSkeleton: string;
    totalOriginalLines: number;
    totalSkeletonLines: number;
    overallSavingsPercent: number;
}>;
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