export type ValidationResult<T> = {
    ok: true;
    value: T;
} | {
    ok: false;
    error: string;
};
/**
 * Validate the `update-script` request body. Returns the parsed,
 * schema-conformant script on success, or a human-readable error
 * suitable for sending back as a 400 response.
 */
export declare function validateUpdateScriptBody(body: unknown): ValidationResult<{
    filePath: string;
    script: unknown;
}>;
/**
 * Validate the `update-beat` request body. `beatIndex` is allowed
 * to be any non-negative integer; the handler still bounds-checks
 * against the actual script length after reading the file.
 */
export declare function validateUpdateBeatBody(body: unknown): ValidationResult<{
    filePath: string;
    beatIndex: number;
    beat: unknown;
}>;
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