{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-st8lgtny","versions":[{"created_at":"2026-06-28T06:00:59Z","element_count":90,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"36976438a56cfe8a22bb5597c429405330e4c88c47ce6d7755f8028957f1708c","version":3},{"created_at":"2026-06-28T05:55:19Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"121d9ecd6017d8d61e7825aee4bbb91b822e330758ec7ea438437088bf1b0473","version":2},{"created_at":"2026-06-28T05:55:19Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}