/**
 * Return the locale-formatted parts of a PlainDate.
 *
 * - This is GMT's substitute for a token formatter (Luxon `toFormat`, date-fns
 *   `format`). A token pattern hard-codes field order and ships US ordering to
 *   every locale; `formatToParts` gives the caller full control over presentation
 *   while the *locale* keeps control of order. See Decision 1 in
 *   `context/roadmap/issues/J.md`.
 * - Each part is `{ type, value }` where `type` is one of:
 *   `"era"`, `"year"`, `"month"`, `"day"`, `"weekday"`, `"literal"`.
 * - The caller should iterate the array as returned; reassembling in a fixed
 *   order reintroduces exactly the bug `formatToParts` exists to avoid.
 * - Returns `[]` for invalid input.
 *
 * @param value ISO PlainDate string
 * @param locale optional BCP 47 locale identifier
 * @param options optional Intl.DateTimeFormatOptions
 * @returns array of `{ type, value }` parts, or `[]` on invalid input
 *
 * @example formatDateToParts("2024-03-15", "en-US") // [{ type: "month", value: "3" }, { type: "literal", value: "/" }, { type: "day", value: "15" }, { type: "literal", value: "/" }, { type: "year", value: "2024" }]
 * @example formatDateToParts("2024-03-15", "de-DE") // [{ type: "day", value: "15" }, { type: "literal", value: "." }, { type: "month", value: "3" }, { type: "literal", value: "." }, { type: "year", value: "2024" }]
 * @example formatDateToParts("invalid") // []
 */
export declare function formatDateToParts(value: string, locale?: string, options?: Intl.DateTimeFormatOptions): Array<{
    type: string;
    value: string;
}>;