/**
 * Common type aliases for unknown types used throughout the codebase
 * These provide semantic meaning while maintaining type safety
 */
/**
 * Unknown data parsed from tool output (JSON, text, etc.)
 * Must be validated before use
 */
export type UnknownToolOutput = unknown;
/**
 * Unknown parsed data from a quality tool
 * Used as a generic constraint for lens parsing
 */
export type UnknownParsedData = unknown;
/**
 * Unknown JSON structure from external tools
 * Requires runtime validation
 */
export type UnknownJson = unknown;
/**
 * Unknown configuration or options object
 * Should be validated against expected schema
 */
export type UnknownConfig = unknown;
/**
 * Unknown environment variable value
 * Could be string, undefined, or other types
 */
export type UnknownEnvValue = unknown;
/**
 * Unknown error object from catch blocks
 * Should be checked before accessing properties
 */
export type UnknownError = unknown;
/**
 * Unknown message data from IPC or process communication
 */
export type UnknownMessage = unknown;
/**
 * Unknown metadata or custom fields
 * Used for extensible properties
 */
export type UnknownMetadata = Record<string, unknown>;
/**
 * Type guard to check if a value is an Error
 */
export declare function isError(value: unknown): value is Error;
/**
 * Type guard to check if a value is a string
 */
export declare function isString(value: unknown): value is string;
/**
 * Type guard to check if a value is an object
 */
export declare function isObject(value: unknown): value is Record<string, unknown>;
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