export interface DelegationBudgetConfig {
    maxConcurrentChildrenPerAgent?: number;
    maxConcurrentAgents?: number;
    maxTotalAgents?: number;
}
export type BudgetRefusalReason = 'max_concurrent_children_per_agent' | 'max_concurrent_agents' | 'max_total_agents';
export interface BudgetCheckResult {
    allowed: boolean;
    reason?: BudgetRefusalReason;
    detail?: string;
}
export declare function resolveDelegationBudgetConfig(): DelegationBudgetConfig | undefined;
export interface DelegationBudgetSnapshot {
    concurrent: number;
    total: number;
    config: DelegationBudgetConfig;
}
export interface SpawnReceipt {
    release: () => void;
    rollback: () => void;
}
export declare class DelegationBudget {
    private readonly config;
    private concurrent;
    private total;
    private readonly concurrentChildrenByAgent;
    constructor(config: DelegationBudgetConfig);
    canSpawn(parentId: string): BudgetCheckResult;
    recordSpawn(parentId: string): SpawnReceipt;
    snapshot(): DelegationBudgetSnapshot;
}
export declare function buildBudgetRefusalMessage(check: BudgetCheckResult): string;