/**
 * Pure per-agent tool-call aggregation for compact fleet-chat mode.
 *
 * In `compact` mode the director bridge does not emit one chat line per
 * subagent tool call; instead each call is folded into a per-agent
 * `ToolAgg` and committed as ONE summary line at the same turn
 * boundaries that flush the buffered assistant text (session end, task
 * completion, effect teardown). Kept hook-free so it is unit-testable
 * without React or a Director.
 */
export interface ToolAgg {
    /** Total tool calls in this turn. */
    total: number;
    /** Calls that reported ok === false. */
    fails: number;
    /** Sum of reported durations (calls without a duration contribute 0). */
    totalMs: number;
    /** Call count per tool name, insertion-ordered. */
    byTool: Map<string, number>;
}
export declare function newToolAgg(): ToolAgg;
export declare function addTool(agg: ToolAgg, name: string, ok?: boolean | undefined, durationMs?: number | undefined): void;
/**
 * Render an aggregate as a single chat line:
 * `14 tools · grep×9 read×5 · 3.2s · 1 ✗`
 *
 * The top `maxTools` tools by count are listed; any remainder collapses
 * into `+N more`. Segments with nothing to say (no duration, no
 * failures) are omitted. Returns '' for an empty aggregate.
 */
export declare function formatToolSummary(agg: ToolAgg, maxTools?: number): string;
//# sourceMappingURL=fleet-chat-coalescer.d.ts.map