/**
 * Check if a value is an array.
 */
export declare function isArray(value: unknown): value is unknown[];
/**
 * Check if a value is an object (excludes null and arrays).
 */
export declare function isObject(value: unknown): value is Record<string, unknown>;
/**
 * Check if a value is a plain object (created by `{}` or `Object.create(null)`).
 * Excludes class instances, arrays, and other special objects.
 */
export declare function isPlainObject(value: unknown): value is Record<string, unknown>;
/**
 * Check if a value is a Map.
 */
export declare function isMap(value: unknown): value is Map<unknown, unknown>;
/**
 * Check if a value is a Set.
 */
export declare function isSet(value: unknown): value is Set<unknown>;
/**
 * Check if a value is a WeakMap.
 */
export declare function isWeakMap(value: unknown): value is WeakMap<object, unknown>;
/**
 * Check if a value is a WeakSet.
 */
export declare function isWeakSet(value: unknown): value is WeakSet<object>;
/**
 * Check if a value is a Date instance.
 */
export declare function isDate(value: unknown): value is Date;
/**
 * Check if a value is a valid Date (not Invalid Date).
 */
export declare function isValidDate(value: unknown): value is Date;
/**
 * Check if a value is a RegExp.
 */
export declare function isRegExp(value: unknown): value is RegExp;
/**
 * Check if a value is an Error instance.
 */
export declare function isError(value: unknown): value is Error;
/**
 * Check if a value is a Promise.
 */
export declare function isPromise(value: unknown): value is Promise<unknown>;
/**
 * Check if a value is an ArrayBuffer.
 */
export declare function isArrayBuffer(value: unknown): value is ArrayBuffer;
/**
 * Check if a value is a typed array (Uint8Array, Float32Array, etc.).
 */
export declare function isTypedArray(value: unknown): value is Int8Array | Uint8Array | Uint8ClampedArray | Int16Array | Uint16Array | Int32Array | Uint32Array | Float32Array | Float64Array;
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