import type { z } from "zod";
/**
 * Parse a value using the zod schema, or default. This is useful when parsing build-time
 * environmental variables that need to be access via the full object path, like
 * `process.env.COMMIT`.
 */
export declare function parseOrDefault<SchemaType extends z.ZodType<any, any>>(value: string | undefined, schema: SchemaType, defaultValue: z.infer<SchemaType>): z.infer<SchemaType>;
/**
 * Parse an arbitrary value using the zod schema, returning `null` on
 * failure. Use this for the common pattern of validating untrusted
 * runtime data (postMessage payloads, JSON strings parsed out of DOM
 * attributes, etc.) where the caller doesn't care *why* parsing failed
 * — they just want the typed value or nothing.
 */
export declare function parseSchemaOrNull<SchemaType extends z.ZodType<any, any>>(value: unknown, schema: SchemaType): z.infer<SchemaType> | null;