import { type BundledProviderName } from '../providers/index.js';
export declare function isAnthropicCredential(key: string | undefined): key is string;
export declare function applyParentCredentialFallback(args: {
    childModel: string;
    resolved: string | undefined;
    parentApiKey: string | undefined;
}): string | undefined;
export declare function applyManagerApiKeyFallback(args: {
    childModel: string | undefined;
    configApiKey: string | undefined;
    parentApiKey: string | undefined;
    parentProvider?: BundledProviderName | undefined;
}): string | undefined;
export declare function sameCredentialFamily(a: BundledProviderName, b: BundledProviderName): boolean;