{"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-theoldmillhouse-upfebiip","versions":[{"created_at":"2026-06-22T14:25:30Z","element_count":90,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b418f3ff01b5f6c3bc55532bafb895afd5a3a314b8ac7ac4303051c74ebfc9da","version":3},{"created_at":"2026-06-22T14:15:36Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"569ee4d7b8fa4f36136a1c89c3814962edc51fdf85ba7ae2966d8b280dde0fa0","version":2},{"created_at":"2026-06-22T14:15:32Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}