{"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-4pc11mbr","versions":[{"created_at":"2026-06-13T20:29:23Z","element_count":73,"note":"5軸GA polish 43->93 by M5 (autonomous)","saved_by":"mcp","sha256":"13b646f8abb231ae894a335533747ae16284c4851c2b5f94b7f94f34a0a42837","version":3},{"created_at":"2026-06-13T20:13:46Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"df74fc3d637449bb69a86c23d5e279bbdd5e60c56e6b153609286ef56abbaf85","version":2},{"created_at":"2026-06-13T20:13:44Z","element_count":88,"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}]}