import type { Edge } from "./types.js";
export type NodeType = "start" | "end" | "node" | "subgraph";
export interface GraphNode {
    id: string;
    type: NodeType;
    hasRetry: boolean;
    isSubgraph: boolean;
}
export interface GraphEdge {
    from: string;
    to: string;
    type: "static" | "conditional";
    label?: string;
}
export interface GraphDescriptor {
    nodes: GraphNode[];
    edges: GraphEdge[];
    /** Nodes that have no outgoing edges to non-END nodes */
    terminals: string[];
    /** Nodes that can reach themselves (cycles) */
    cycles: string[][];
    /** Topologically sorted node order (if acyclic) */
    topoOrder: string[] | null;
}
export declare function buildGraphDescriptor<S>(nodeMap: Map<string, {
    name: string;
    retry?: unknown;
    subgraph?: unknown;
}>, edges: Edge<S>[]): GraphDescriptor;
export declare function toMermaidDetailed(descriptor: GraphDescriptor): string;
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