/**
 *
 * Part 4.A: aggregate lease-kind observability events for one session,
 * render per-kind counts + a 5-event chronological tail.
 *
 * Part 5 adds:
 *   - `--rate`         : leak-rate computation (spawn - release - gc)
 *                        plus lifetime stats (avg / p99) per lease id.
 *   - `--all-sessions` : aggregate across every session under
 *                        `.peaks/_runtime/<sid>/metrics/slices.jsonl`
 *                        for the given project root. Useful for
 *                        cross-session dashboards.
 *
 * Aggregation is pure (operates on already-read ObservabilityEvent[]);
 * the IO layer is the JSONL read at the call site. The reader filters
 * on `category === 'lease'`; the schema is the same as every other
 * observability event (Part 4.A reused the existing schema v1).
 */
import type { Command } from 'commander';
import { type ProgramIO } from '../cli-helpers.js';
import { type ObservabilityEvent } from '../../services/observability/observability-service.js';
import { readAllSessionLeaseEvents, type RateStats } from './lease-metrics-commands-support.js';
export { readAllSessionLeaseEvents, type RateStats };
export declare function recomputeRate(leaseEvents: ReadonlyArray<ObservabilityEvent>): RateStats;
export declare function registerLeaseMetricsCommand(parent: Command, io: ProgramIO): void;