/**
 * Minimal copy-on-write draft (immer-like), scoped to plain objects, arrays,
 * Map and Set. The base is never mutated; untouched subtrees keep reference
 * identity, and a recipe that changes nothing returns the base itself
 * (Object.is-equal).
 *
 * Map values are draftable; Set elements and class instances are atomic leaf
 * values — they are replaced wholesale, never drafted.
 */
export declare function isDraftable(value: unknown): value is object;
export declare function produce<T extends object>(base: T, recipe: (draft: T) => void): T;