/**
 * Loads a schema authored as a JS/TS module and returns the exported schema value.
 *
 * Export selection, in order of preference:
 * 1. The export named by `exportName`, when provided (`--export <name>`).
 * 2. The module's default export.
 * 3. The sole named export, when there is exactly one.
 *
 * Anything else is ambiguous and throws, so the user can disambiguate explicitly
 * rather than have mjst guess wrong.
 *
 * Importing a `.ts` module requires a TypeScript-capable runtime (Bun, or Node
 * with a loader such as `tsx`). We surface a friendly hint when the import fails
 * for a `.ts` path so the cause is not a cryptic module-resolution error.
 */
export declare const loadSchemaModule: (modulePath: string, exportName?: string) => Promise<unknown>;