/** The single calendar abstraction both the .ics (Sprint 2) and Google (Sprint 3) connectors implement. */
import type { BusyInterval, PlanItem } from "./types.js";
/** The free/busy lookup window (subset of SlotConstraints — see types.ts:57). */
export interface FreeBusyWindow {
    windowStartIso: string;
    windowEndIso: string;
}
/** Outcome of writeEvents — what was written and where. */
export interface WriteResult {
    writtenCount: number;
    target: string;
}
/**
 * A calendar backend. The slotter/CLI depend ONLY on this interface so a second
 * connector can be added in Sprint 3 without touching the slotter (DoD).
 */
export interface CalendarConnector {
    readonly name: string;
    readFreeBusy(window: FreeBusyWindow): Promise<BusyInterval[]>;
    writeEvents(items: PlanItem[]): Promise<WriteResult>;
}
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