export type SystemPresence = {
    host?: string;
    ip?: string;
    version?: string;
    platform?: string;
    deviceFamily?: string;
    modelIdentifier?: string;
    lastInputSeconds?: number;
    mode?: string;
    reason?: string;
    deviceId?: string;
    roles?: string[];
    scopes?: string[];
    instanceId?: string;
    text: string;
    ts: number;
};
type SystemPresenceUpdate = {
    key: string;
    previous?: SystemPresence;
    next: SystemPresence;
    changes: Partial<SystemPresence>;
    changedKeys: (keyof SystemPresence)[];
};
type SystemPresencePayload = {
    text: string;
    deviceId?: string;
    instanceId?: string;
    host?: string;
    ip?: string;
    version?: string;
    platform?: string;
    deviceFamily?: string;
    modelIdentifier?: string;
    lastInputSeconds?: number;
    mode?: string;
    reason?: string;
    roles?: string[];
    scopes?: string[];
    tags?: string[];
};
export declare function updateSystemPresence(payload: SystemPresencePayload): SystemPresenceUpdate;
export declare function upsertPresence(key: string, presence: Partial<SystemPresence>): void;
export declare function listSystemPresence(): SystemPresence[];
export {};