/**
 * Engine-neutral graph shapes — the mirror of the relational DatabaseResult.
 *
 * GraphNode / GraphEdge are the portable node/edge core the unified surface
 * returns; GraphResult is the raw-query result (records + columns), the same
 * shape as `DatabaseResult`, so a graph read feels exactly like a SQL read.
 * See tina4-documentation/plan/v3/decisions/ADR-0059.md and features/139.
 */
/** Engine-neutral vertex: id, labels, properties. */
export declare class GraphNode {
    readonly id: string;
    readonly labels: string[];
    readonly properties: Record<string, unknown>;
    constructor(id: string, labels?: string[] | null | undefined, properties?: Record<string, unknown> | null | undefined);
    toDict(): Record<string, unknown>;
}
/** Engine-neutral edge: id, type, from/to node ids, properties. */
export declare class GraphEdge {
    readonly id: string;
    readonly type: string;
    readonly from: string;
    readonly to: string;
    readonly properties: Record<string, unknown>;
    constructor(id: string, type: string, from: string, to: string, properties?: Record<string, unknown> | null | undefined);
    toDict(): Record<string, unknown>;
}
/** A raw-query result — records + columns, same shape as DatabaseResult. */
export declare class GraphResult implements Iterable<Record<string, unknown>> {
    readonly records: Record<string, unknown>[];
    readonly columns: string[];
    constructor(records?: Record<string, unknown>[] | null | undefined, columns?: string[] | null | undefined);
    toArray(): Record<string, unknown>[];
    /** The first value of the first record, or null. */
    scalar(): unknown;
    [Symbol.iterator](): Iterator<Record<string, unknown>>;
    get length(): number;
}