{"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-1x00g62d","versions":[{"created_at":"2026-07-03T06:27:36Z","element_count":83,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"3979a9daeadaa5a9073afaf333bfe94af3b4ab759797b6a85714c4b80a67ef9f","version":3},{"created_at":"2026-07-03T06:22:59Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"367875ef5c12e0e6d9ca6c73074c32d100ddf7a7cee7fea52885934ccc7062ee","version":2},{"created_at":"2026-07-03T06:22:59Z","element_count":126,"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}]}