export type AgentIdentityTier = 'account-scoped' | 'family-scoped' | 'persona-scoped';
export declare const CANONICAL_AGENT_TIERS: readonly AgentIdentityTier[];
export declare function isCanonicalAgentTier(value: unknown): value is AgentIdentityTier;
export interface AgentReference {
    readonly agentRefId: string;
    readonly tier: AgentIdentityTier;
    readonly subjectUserId: string;
    readonly displayHint?: string;
}
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