/**
 * Internal schema shape helpers shared by server route registration and
 * OpenAPI generation.
 *
 * These helpers are intentionally zod-free: zod is an optional peer
 * dependency, so shape extraction duck-types Zod's `_def.shape` internals and
 * returns undefined for schemas it cannot introspect. This module is not
 * exported from the package index.
 */
/**
 * Extract the field shape (field name → field schema) from an object schema.
 *
 * Returns undefined when the schema is not an introspectable object schema,
 * for example a non-Zod Standard Schema.
 */
export declare function getObjectSchemaShape(schema: unknown): Record<string, unknown> | undefined;
/**
 * Compare a path template's dynamic keys against a pathParams schema shape.
 */
export declare function comparePathParamsToTemplate(args: {
    pathKeys: readonly string[];
    shapeKeys: readonly string[];
}): {
    missingKeys: string[];
    extraKeys: string[];
};
/**
 * Format a pathParams/template mismatch for error messages.
 *
 * Shared so server registration and OpenAPI generation report the same
 * diagnostic details.
 */
export declare function formatPathParamsMismatch(args: {
    missingKeys: readonly string[];
    extraKeys: readonly string[];
}): string;
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