/** Require a non-empty string from tool args. */
export declare function requireString(args: Record<string, unknown>, key: string): string;
/** Require a finite number from tool args. */
export declare function requireNumber(args: Record<string, unknown>, key: string, fallback?: number): number;
/** Convenience: require and validate project_path in one call. */
export declare function requireProjectPath(args: Record<string, unknown>): string;