/**
 * Normalize boolean schemas without mutating caller-owned data.
 * Only changed schema containers and their ancestors are copied. Unchanged bundled
 * documents and opaque example/extension payloads retain their identity. Iterative
 * discovery and copy propagation preserve cycles without recursive cloning.
 * The marker represents an untyped schema; false is its negation. additionalProperties
 * already accepts booleans and therefore retains its authored representation.
 */
export declare const normalizeBooleanSchemas: <T extends Record<string, unknown>>(document: T) => T;
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