/**
 * Signature shape classification for the Capability Index.
 *
 * Classifies TypeScript function signatures into semantic categories
 * using regex pattern matching on the signature strings already
 * available in registry.json (extracted by extractSignature.ts).
 *
 * Also provides member extraction for interface/type overlap detection.
 */
export type SignatureShape = 'predicate' | 'collection-transform' | 'factory-text' | 'factory-object' | 'filesystem-scan' | 'void-effect' | 'async-fetch' | 'callback-pattern' | 'mapper' | 'unknown';
/**
 * Classify a function signature string into a semantic shape.
 *
 * Order matters — patterns are checked from most specific to least.
 * First match wins.
 *
 * @param signature - The signature string from registry (e.g. "(items: Item[]) => Item[]")
 * @returns The classified shape
 */
export declare function classifySignature(signature: string | undefined): SignatureShape;
/**
 * Extract member names from an interface/type signature string.
 *
 * Input:  "{ name: string; age: number; email: string ... +2 more }"
 * Output: ["name", "age", "email"]
 *
 * Works with the truncated signature format produced by extractSignature.ts.
 */
export declare function extractMembers(signature: string): string[];