export interface NormalizedSubagentOptions {
    label?: string;
    phase?: string;
    profile?: string;
    sessionKey?: string;
    schema?: unknown;
}
export declare function truncateLogLine(text: string, maxLength: number): string;
export declare function requireString(value: unknown, name: string): string;
export declare function normalizeSubagentOptions(value: unknown): NormalizedSubagentOptions;
export declare function defaultSubagentLabel(phase: string | undefined, index: number): string;
export declare function normalizeJsonSerializable(value: unknown, name: string): unknown;