/**
 * Signature Extractor
 *
 * Extracts function/class signatures and docstrings from source files
 * across multiple languages using regex patterns (no AST required).
 *
 * Used to build a compact semantic index of all project files for Stage 1,
 * replacing the simple file-path list with language-aware summaries.
 */
export interface ExtractedSignature {
    kind: 'class' | 'function' | 'method' | 'interface' | 'type' | 'const';
    name: string;
    signature: string;
    docstring?: string;
    decorator?: string;
}
export interface FileSignatureMap {
    path: string;
    language: string;
    entries: ExtractedSignature[];
}
export declare const STAGE1_MAX_CHARS = 40000;
export declare function detectLanguage(filePath: string): string;
/**
 * Resolve the language of a `.h` header (spec-08). `.h` is claimed by both C and
 * C++. Rule: a project with `.c` files and no C++ sources → C; otherwise C++
 * (the default / superset, which parses C headers acceptably).
 */
export declare function resolveHeaderLanguage(hasCSources: boolean, hasCppSources: boolean): 'C' | 'C++';
export declare function extractSignatures(filePath: string, content: string): FileSignatureMap;
/**
 * Format signature maps as compact text blocks for Stage 1 LLM prompt.
 * Returns an array of chunk strings — 1 element if total fits within maxChars,
 * N elements if chunking is needed. Files are never split across chunks.
 */
export declare function formatSignatureMaps(maps: FileSignatureMap[], maxChars?: number): string[];
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