```typescript
/** An append-only log of timestamped events. */
export class EventLog {
  #events = [] as Event[];

  /** Append one event. */
  record(event: Event): void {
    this.#events.push(event);
  }

  /**
   * Every event at or after the given timestamp, in insertion order.
   *
   * @param timestamp - A time point.
   */
  since(timestamp: number): ReadonlyArray<{ name: string; timestamp: number }> {
    return this.#events.filter((event) => event.timestamp >= timestamp);
  }
}
```