export declare const MAX_PROGRESS_LINES = 6;
export declare const MAX_PROGRESS_ENTRIES = 32;
export type ProgressEntry = {
    readonly label: string;
    readonly at: number;
};
export declare function renderProgressRegion(lines: readonly string[]): string;
export declare function safeSplicePoint(text: string, pos: number): number;
export declare function renderInterleavedPreview(text: string, entries: readonly ProgressEntry[]): string;
export interface LivePreviewState {
    readonly accumulated: string;
    readonly progressEntries: readonly ProgressEntry[];
    readonly progressGateOpen: boolean;
    readonly subagentSteps: number;
    readonly recentSubagentSteps: readonly string[];
}
export declare function computeLivePreview(state: LivePreviewState): string;