import type { ContentBlock, MemoryRef, ToolCallProjection, TurnProjection } from "../../schemas/projection";
export interface TurnState {
    turnId: string;
    loopId: string;
    role: "user" | "assistant" | "system";
    model: string | null;
    startedAt: number;
    contextWindow: number;
    blocks: ContentBlock[];
    toolCalls: ToolCallProjection[];
    usage: Record<string, unknown> | null;
    responseDone: boolean;
    firstTokenMs: number | null;
    streamDurationMs: number | null;
    firstTokenDeliveryMs: number | null;
    /** 生产者上报的模型请求时序；缺失时保持 null，不用浏览器时间补（#2581 A1/I1）。 */
    modelStartedAt: string | null;
    modelDurationMs: number | null;
    modelStartedAtReported: boolean;
    memoryRefs: MemoryRef[] | null;
    parentForkToolCallId: string | null;
}
export declare function createTurnState(turnId: string, loopId: string, opts?: {
    model?: string | null;
    contextWindow?: number;
    memoryRefs?: MemoryRef[] | null;
}): TurnState;
export declare function snapshot(state: TurnState, sequence: number, status: TurnProjection["status"]): TurnProjection;
export declare const PAUSE_TOOL_NAMES: Set<string>;
export declare function toolStatusFromResult(result: unknown): ToolCallProjection["status"];