import type { OutputEvent, SubagentProgressMeta } from '../../../agent/types.js';
import type { ToolResultChunk, ToolUseDetailChunk } from '../../../agent/types/message-types.js';
import type { CompletionWriter } from './shared.js';
export interface PlainProgressState {
    readonly toolStartTimes: Map<string, number>;
    readonly subagentStartTimes: Map<string, number>;
    readonly subagentLabels: Map<string, string>;
}
export declare function createPlainProgressState(): PlainProgressState;
export declare function recordToolStart(state: PlainProgressState, chunk: ToolUseDetailChunk): void;
export declare function emitPlainToolCompletion(state: PlainProgressState, chunk: ToolResultChunk, toolName: string | undefined, writer: CompletionWriter): void;
export declare function observePlainSubagentEvent(state: PlainProgressState, event: OutputEvent, meta: SubagentProgressMeta, writer: CompletionWriter): void;