import type { ProviderName } from "../providers/factory.js";
export type DifficultyTier = "default" | "cheap" | "standard" | "hard" | "frontier";
export interface RoleProviderBlock {
    provider: ProviderName;
    model: string;
    endpoint?: string | null;
}
export interface TieredRoleBlock {
    planner: RoleProviderBlock;
    generator: RoleProviderBlock;
    evaluator: RoleProviderBlock;
}
export interface TierProviderPolicy {
    resolveTier(tier?: DifficultyTier): TieredRoleBlock | undefined;
    knownTiers(): DifficultyTier[];
}
export declare const tierPolicy: TierProviderPolicy;
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