/**
 * ACP domain state, tracks the Agent Client Protocol transport layer,
 * active subagent connections, and inter-session ACP sessions.
 */
import type { DaemonTransportState } from './daemon.js';
/** ACP transport state reuses the daemon transport lifecycle. */
export type AcpTransportState = DaemonTransportState;
/** An active ACP subagent connection. */
export interface AcpConnection {
    /** Subagent ID. */
    agentId: string;
    /** Human-readable label for this connection. */
    label: string;
    /** ACP transport state for this specific connection. */
    transportState: AcpTransportState;
    /** Epoch ms when the connection was established. */
    connectedAt?: number | undefined;
    /** Whether the subagent has completed and the connection is being torn down. */
    completing: boolean;
    /** Number of messages exchanged on this connection. */
    messageCount: number;
    /** Number of protocol errors on this connection. */
    errorCount: number;
    /** Last protocol error message. */
    lastError?: string | undefined;
    /** Task associated with this ACP connection. */
    taskId?: string | undefined;
}
/**
 * AcpDomainState, ACP protocol transport and connection state.
 */
export interface AcpDomainState {
    /** Monotonic revision counter; increments on every mutation. */
    revision: number;
    /** Timestamp of last mutation (Date.now()). */
    lastUpdatedAt: number;
    /** Subsystem that triggered the last mutation. */
    source: string;
    /** Current ACP manager transport state. */
    managerTransportState: AcpTransportState;
    /** Whether the ACP subsystem has been initialized. */
    initialized: boolean;
    /** All ACP connections keyed by agentId. */
    connections: Map<string, AcpConnection>;
    /** IDs of active (non-completing) connections. */
    activeConnectionIds: string[];
    /** Total subagents spawned via ACP this session. */
    totalSpawned: number;
    /** Total ACP connections that completed successfully. */
    totalCompleted: number;
    /** Total ACP connections that failed. */
    totalFailed: number;
    /** Total messages exchanged across all connections. */
    totalMessages: number;
}
/**
 * Returns the default initial state for the ACP domain.
 */
export declare function createInitialAcpState(): AcpDomainState;
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