{"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-okhvw4hh","versions":[{"created_at":"2026-07-15T06:00:36Z","element_count":72,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"e04a1c5be8652af712b007781d6aa4737c4f7cd9f952b008956c053ad0aa598f","version":3},{"created_at":"2026-07-15T05:52:50Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ce821b9f0d149c056df880f07b5aa2eefc90eac98c59ee121a0da9b3cb4a7717","version":2},{"created_at":"2026-07-15T05:52:50Z","element_count":90,"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}]}