{"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-d7fz5ak9","versions":[{"created_at":"2026-07-07T19:48:02Z","element_count":83,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"25bf687bcc0b7d999aa847a30b3bd294ae13dfa5f881fa3a47d77277058531e1","version":3},{"created_at":"2026-07-07T19:34:40Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b12a70f2006b7ee404751f9746864c4a6d9b62d4ec4800cda8c01f38cd39f204","version":2},{"created_at":"2026-07-07T19:34:40Z","element_count":101,"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}]}