import type { AgentConfig, AgentModelInput } from '../types.js';
import type { TraceSink } from '../trace/index.js';
export interface EmitForkStartedArgs {
    effectiveTraceWriter: TraceSink | undefined;
    id: string;
    parentSessionId: string | undefined;
    rootId: string;
    effectiveChildModel: AgentModelInput;
    childConfig: AgentConfig;
    promptHead: string | undefined;
    effectiveAgentType: string | undefined;
    effectiveResolvedAgentType: string | undefined;
}
export declare function emitForkStarted(args: EmitForkStartedArgs): string;
export interface AppendForkTelemetryArgs {
    modelString: string;
    id: string;
    idPrefix: string | undefined;
    parentSessionId: string | undefined;
    effectiveResolvedAgentType: string | undefined;
}
export declare function appendForkTelemetry(args: AppendForkTelemetryArgs): Promise<void>;