{"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-oj3qdek3","versions":[{"created_at":"2026-06-27T06:11:04Z","element_count":73,"note":"5軸GA polish 42->93 by M5 (autonomous)","saved_by":"mcp","sha256":"8ce77b14b54b26ebd80557a133c57871bb8798d3bf5b6f13922e365a52ef6ade","version":3},{"created_at":"2026-06-27T06:05:32Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"64a13900b4fc047b712ad16fb57bfd91301f7cebf62b571c20988072543c7b1d","version":2},{"created_at":"2026-06-27T06:05:32Z","element_count":119,"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}]}