/**
 * Turn progress controller - tracks tool calls and maintains status.
 * Adapted from IdleHands.
 */
import type { ProgressHooks, ProgressSnapshot, ToolCallEvent } from "./types.js";
export type TurnProgressOptions = {
    /** Heartbeat interval for status updates (default: 1000ms) */
    heartbeatMs?: number;
    /** Quantize elapsed time to reduce status line churn (default: 5000ms) */
    bucketMs?: number;
    /** Max tool lines to keep (default: 8) */
    maxToolLines?: number;
    /** Custom tool call summary formatter */
    formatToolCall?: (call: ToolCallEvent) => string;
};
export type ProgressSink = (snap: ProgressSnapshot) => void;
export declare class TurnProgressController {
    readonly hooks: ProgressHooks;
    private readonly sink;
    private readonly heartbeatMs;
    private readonly bucketMs;
    private readonly maxToolLines;
    private readonly formatToolCall;
    private startedAt;
    private lastActivityAt;
    private phase;
    private timer;
    private lastRenderedLine;
    private activeTool;
    private toolLines;
    private turnCount;
    private totalToolCalls;
    private totalPromptTokens;
    private totalCompletionTokens;
    private lastTurnStats;
    private contextTokens;
    constructor(sink: ProgressSink, opts?: TurnProgressOptions);
    start(): void;
    stop(): void;
    snapshot(): ProgressSnapshot;
    private buildStatusLine;
    private emit;
    private markActivity;
    private pushToolLine;
    private replaceLastToolLine;
    private onToken;
    private onFirstDelta;
    private onToolCall;
    private onToolResult;
    private onTurnEnd;
}