/**
 * Default Google Calendar OAuth scopes when commitment content does not list any.
 *
 * @private internal USE CALENDAR constant
 */
export declare const DEFAULT_GOOGLE_CALENDAR_SCOPES: readonly ["https://www.googleapis.com/auth/calendar"];
/**
 * Calendar provider types currently supported by USE CALENDAR.
 *
 * @private internal utility of USE CALENDAR commitment
 */
export type CalendarProviderType = 'google';
/**
 * Canonical calendar reference resolved from commitment content.
 *
 * @private internal utility of USE CALENDAR commitment
 */
export type CalendarReference = {
    provider: CalendarProviderType;
    url: string;
    calendarId: string;
    scopes: string[];
    tokenRef?: string;
};
/**
 * Parsed `USE CALENDAR` payload.
 *
 * @private internal utility of USE CALENDAR commitment
 */
export type ParsedUseCalendarCommitmentContent = {
    calendar: CalendarReference | null;
    calendarUrlRaw: string | null;
    instructions: string;
};
/**
 * Parses one Google Calendar URL/reference into canonical details.
 *
 * Supported input forms:
 * - `https://calendar.google.com/...`
 * - `calendar.google.com/...`
 *
 * @private internal utility of USE CALENDAR commitment
 */
export declare function parseGoogleCalendarReference(rawReference: string): CalendarReference | null;
/**
 * Parses `USE CALENDAR` commitment content into calendar reference + optional instructions.
 *
 * @private internal utility of USE CALENDAR commitment
 */
export declare function parseUseCalendarCommitmentContent(content: string): ParsedUseCalendarCommitmentContent;
/**
 * Extracts canonical calendar references from parsed commitments.
 *
 * @private internal utility of USE CALENDAR commitment
 */
export declare function extractUseCalendarReferencesFromCommitments(commitments: ReadonlyArray<{
    type: string;
    content: string;
}>): CalendarReference[];
/**
 * Attempts to resolve one concrete Google Calendar id from URL.
 *
 * @private internal utility of USE CALENDAR commitment
 */
export declare function parseGoogleCalendarIdFromUrl(url: URL): string | null;