export class LineBuffer {
  private pending = "";

  push(chunk: string): string[] {
    this.pending += chunk;
    const parts = this.pending.split("\n");
    this.pending = parts.pop() ?? "";
    return parts;
  }

  flush(): string[] {
    if (!this.pending) return [];
    const remaining = this.pending;
    this.pending = "";
    return [remaining];
  }
}