{"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-lwvk3t8q","versions":[{"created_at":"2026-06-22T06:06:53Z","element_count":90,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"c3aa4ee2c1a07ceaaa8e594976b4ad844a8a1da2dd87f07b86db431b9edb663a","version":3},{"created_at":"2026-06-22T05:57:28Z","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":"38da0f752da6e4ae08b24ac93c3a4bed6a15d58b84b0cfdbd65ff2e5c1f59a65","version":2},{"created_at":"2026-06-22T05:57:28Z","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}]}