{"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-8fxrmzod","versions":[{"created_at":"2026-07-13T10:37:34Z","element_count":73,"note":"5軸GA polish 43->93 by M5 (autonomous)","saved_by":"mcp","sha256":"bcbfadbe30e1a3835609c8e839bce182bec7b2afe72dfe3c7ed7d14e5b3c60f7","version":3},{"created_at":"2026-07-13T10:27:51Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"09a65cc6f9d3cfe5a038af062e3c452609cd284249b41d8e6c0535bcd0ce5c7b","version":2},{"created_at":"2026-07-13T10:27:51Z","element_count":105,"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}]}