import type { BackendType } from './model-runner.js';
export interface BackendModelChange {
    target: string;
    from: string | undefined;
    to: string;
}
export interface UnknownModelFamilyWarning {
    target: string;
    from: string;
    to: string;
    backend: BackendType;
    unknownFamily: true;
}
export type BackendModelPolicyEntry = BackendModelChange | UnknownModelFamilyWarning;
export declare function defaultModelForBackend(backend: BackendType): string;
export declare function backendForModel(model: string): BackendType | null;
export declare function modelMatchesBackend(model: string, backend: BackendType): boolean;
export declare function resolveBackendScopedModel(input: {
    backend: BackendType;
    model?: string;
    inheritedBackend?: BackendType;
    inheritedModel?: string;
    warningTarget?: string;
    onWarning?: (warning: UnknownModelFamilyWarning) => void;
}): string;
export declare function rescopeConfigModels(input: {
    backend: BackendType;
    agentModel?: string;
    roleModels: Record<string, string | undefined>;
}): {
    agentModel: string;
    roleModels: Record<string, string>;
    changes: BackendModelChange[];
    warnings?: UnknownModelFamilyWarning[];
};
export declare function emitBackendModelWarnings(entries: readonly BackendModelPolicyEntry[], emit?: (message: string) => void): void;
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