export interface BtwConfig {
    /** Optional model override as provider/model-id. Model ids may themselves contain slashes. */
    model?: string;
}
export interface LoadedBtwConfig {
    config: BtwConfig;
    warnings: string[];
}
export declare const DEFAULT_BTW_CONFIG: BtwConfig;
export declare function btwConfigPath(agentDir?: string): string;
export declare function parseModelSpec(value: string): {
    provider: string;
    id: string;
} | undefined;
export declare function loadBtwConfig(agentDir?: string): LoadedBtwConfig;