export interface A2AAgentCard {
    name: string;
    description: string;
    url: string;
    version?: string;
    capabilities?: Record<string, unknown>;
    skills?: A2ASkillInfo[];
}
export interface A2ASkillInfo {
    id: string;
    name: string;
    description: string;
    tags?: string[];
    examples?: string[];
}
export interface A2ADiscoveredAgent {
    agentId: string;
    agentName: string;
    description: string;
    url: string;
    skills: A2ASkillInfo[];
}
interface A2ATaskResult {
    id: string;
    status: {
        state: string;
    };
    artifacts?: Array<{
        name?: string;
        parts: Array<{
            type: string;
            text?: string;
            data?: unknown;
        }>;
    }>;
    history?: Array<{
        role: string;
        parts: Array<{
            type: string;
            text?: string;
            data?: unknown;
        }>;
    }>;
}
declare class A2AClientManager {
    private agents;
    private cards;
    /**
     * Fetch Agent Cards from all configured A2A agents, discover their skills.
     */
    discoverAllAgents(): Promise<A2ADiscoveredAgent[]>;
    /**
     * Send a task to an A2A agent. Returns the task result (synchronous — waits for completion).
     */
    sendTask(agentId: string, message: string, options?: {
        skillId?: string;
        data?: Record<string, unknown>;
    }): Promise<A2ATaskResult>;
    /**
     * Get the status of a previously sent task.
     */
    getTask(agentId: string, taskId: string): Promise<A2ATaskResult>;
    /**
     * Get the cached agent card for an agent.
     */
    getAgentCard(agentId: string): A2AAgentCard | undefined;
    private fetchAgentCard;
}
export declare const a2aClient: A2AClientManager;
export {};
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