import { z } from 'zod';
/** Request (tool parameters) vs response (structured output) projection. */
export type SchemaIo = 'input' | 'output';
/**
 * Zod → JSON Schema for tool/output definitions.
 *
 * Uses Zod 4's native `z.toJSONSchema` directly (Zod is a hard dependency), so
 * the package carries no framework coupling for schema conversion. Strips the
 * `$schema` dialect key (provider tool/output schemas don't want it) and falls
 * back to an open object schema when a schema can't be represented, so
 * tool/output definitions always have *some* parameter shape.
 *
 * `io` selects the request (`'input'`, tool parameters) vs response
 * (`'output'`, structured output) projection; defaults to `'output'`.
 */
export declare function zodToJsonSchema(schema: z.ZodType, io?: SchemaIo): Record<string, unknown>;
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