import type { ClosureReason, TraceSink } from '../trace/index.js';
import type { TraceWriter } from '../trace/writer.js';
export interface ClosureTokenCounters {
    input: number;
    output: number;
    cacheRead: number;
    cacheCreation: number;
}
export interface ClosureSignals {
    dispatchReason: string;
    signal: AbortSignal;
    maxTurnsHit: boolean;
    hookBlocked: boolean;
    lastStopReason: string | undefined;
    sawProviderError: boolean;
}
export declare function deriveClosureReason(s: ClosureSignals): ClosureReason;
export declare function deriveSealStatus(s: ClosureSignals): 'succeeded' | 'failed' | 'cancelled';
export interface ClosureTotals {
    finalTurnCount: number;
    finalCostUsd: number;
}
export interface EmitClosureInput extends ClosureSignals, ClosureTotals {
    runningTokens: ClosureTokenCounters;
}
export declare function emitClosureEvent(writer: TraceSink | undefined, input: EmitClosureInput): Promise<void>;
export interface SealTraceInput extends ClosureSignals, ClosureTotals {
    subagentCompletedCount: number;
    subagentRunningTokens: ClosureTokenCounters;
    subagentRunningCostUsd: number;
}
export declare function sealTraceWriter(writer: TraceWriter | undefined, input: SealTraceInput): Promise<void>;