export interface HqKanbanBoardRecord {
    boardId: string;
    revision: number;
    updatedAt: string;
    /** Opaque KanbanBoard JSON. Kept in core so @wrongstack/kanban remains standalone. */
    board: Record<string, unknown>;
}
export interface HqKanbanTombstone {
    boardId: string;
    revision: number;
    deletedAt: string;
}
/** Complete project state emitted by one client. Missing boards are not deletions. */
export interface HqKanbanSnapshotPayload {
    projectId: string;
    generatedAt: string;
    boards: HqKanbanBoardRecord[];
    tombstones: HqKanbanTombstone[];
}
/** Server-to-client snapshot after HQ has merged all known project writers. */
export interface HqServerKanbanSnapshotMessage {
    type: 'hq.kanban_snapshot';
    payload: HqKanbanSnapshotPayload;
}
export declare function isHqKanbanSnapshotPayload(value: unknown): value is HqKanbanSnapshotPayload;
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