import type { Api, Model } from "@bastani/pi-ai";
import { type Static, Type } from "typebox";
export declare const ModelConstraintsSchema: Type.TObject<{
    allowedModels: Type.TOptional<Type.TArray<Type.TString>>;
    allowedProviders: Type.TOptional<Type.TArray<Type.TString>>;
    excludedProviders: Type.TOptional<Type.TArray<Type.TString>>;
    maxInputCost: Type.TOptional<Type.TNumber>;
    maxOutputCost: Type.TOptional<Type.TNumber>;
    minContextWindow: Type.TOptional<Type.TNumber>;
    requiredInputs: Type.TOptional<Type.TArray<Type.TUnsafe<"image" | "text">>>;
    allowedEfforts: Type.TOptional<Type.TArray<Type.TUnion<[Type.TString, Type.TNull]>>>;
}>;
export type ModelConstraints = Static<typeof ModelConstraintsSchema>;
export declare function parseModelConstraints(value: unknown): ModelConstraints | undefined;
export type ModelRouterOutput = {
    readonly model: string;
    readonly effort: string | null;
    /** Ranked alternatives, excluding the primary. Absent on legacy recorded selections. */
    readonly fallbacks?: readonly {
        readonly model: string;
        readonly effort: string | null;
    }[];
    /** Full IDs of every model the router could choose from after all filters. Absent on legacy recorded selections. */
    readonly candidates?: readonly string[];
};
/** Whether a constraint sets its own provider list. */
export declare function setsProviders(constraints: ModelConstraints | undefined): boolean;
/** Every applicable declaration must hold; a caller never widens a definition restriction. */
export declare function eligiblePair(model: Model<Api>, pair: ModelRouterOutput, constraints: readonly ModelConstraints[]): boolean;
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