{"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-l68rtkkk","versions":[{"created_at":"2026-06-13T20:00:20Z","element_count":72,"note":"5軸GA polish 39->91 by M5 (autonomous)","saved_by":"mcp","sha256":"ae200abf4af45a53acd5255e031572b71b5016fa130c0544ea09abef36af6e54","version":3},{"created_at":"2026-06-13T19:55:09Z","element_count":119,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f76fea14383cf0b5fe3c3bf82d6b9c0e97c78eaa6e4a2e48269fe34074a8bd50","version":2},{"created_at":"2026-06-13T19:55:06Z","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}]}