import type { NodeSpecification } from '@nullplatform/workflow-types';
import type { NodeSpecReference, SerializableWorkflowGraph } from './types.js';
import type { ExecutionObserver } from './execution-observer.js';
export interface RegistryConfig {
    url: string;
    token?: string;
}
export interface SpecResolverOptions {
    cacheDir?: string;
    registries?: Record<string, RegistryConfig>;
    observer?: ExecutionObserver;
}
export declare class SpecResolver {
    #private;
    constructor(options?: SpecResolverOptions);
    resolve(ref: NodeSpecReference): Promise<NodeSpecification>;
    resolveForGraph(graph: SerializableWorkflowGraph): Promise<Map<string, NodeSpecification>>;
    get registries(): Record<string, {
        url: string;
        token?: string;
    }> | undefined;
    getSpecDefinition(name: string): import("@nullplatform/workflow-types").NodeSpecDefinition | undefined;
    getSpecVersionMap(): Map<string, string>;
    /** Pre-load a spec into the memory cache, bypassing all resolution. */
    register(spec: NodeSpecification): void;
}
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