/**
 * AgentRegistry - Process-global registry of live AgentSession instances.
 *
 * Tracks every alive agent (the main session plus every subagent) so the
 * `irc` tool can address peers by id. Sessions are registered explicitly at
 * creation and removed when the owner releases them.
 */
import type { AgentSession } from "../session/agent-session";
export declare const MAIN_AGENT_ID = "0-Main";
export type AgentStatus = "running" | "idle" | "completed" | "aborted";
export type AgentKind = "main" | "sub";
export interface AgentRef {
    id: string;
    displayName: string;
    kind: AgentKind;
    parentId?: string;
    status: AgentStatus;
    session: AgentSession | null;
    sessionFile: string | null;
    createdAt: number;
    lastActivity: number;
}
export type RegistryEvent = {
    type: "registered";
    ref: AgentRef;
} | {
    type: "status_changed";
    ref: AgentRef;
} | {
    type: "removed";
    ref: AgentRef;
};
type RegistryListener = (event: RegistryEvent) => void;
export interface RegisterInput {
    id: string;
    displayName: string;
    kind: AgentKind;
    parentId?: string;
    session: AgentSession | null;
    sessionFile?: string | null;
    status?: AgentStatus;
}
export declare class AgentRegistry {
    #private;
    static global(): AgentRegistry;
    /** Reset the global registry. Test-only. */
    static resetGlobalForTests(): void;
    register(input: RegisterInput): AgentRef;
    setStatus(id: string, status: AgentStatus): void;
    attachSession(id: string, session: AgentSession, sessionFile?: string | null): void;
    detachSession(id: string): void;
    unregister(id: string): void;
    get(id: string): AgentRef | undefined;
    list(): AgentRef[];
    /**
     * Returns every alive agent (running | idle) except the caller.
     * Flat namespace: every agent can see every other agent.
     */
    listVisibleTo(id: string): AgentRef[];
    onChange(listener: RegistryListener): () => void;
}
export {};