{"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-buonp09y","versions":[{"created_at":"2026-06-13T17:24:19Z","element_count":89,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"930de38b620bbfdc63bb0be859ddb9fd8188b3de82b6be836939fdd0a1044105","version":3},{"created_at":"2026-06-13T17:07:47Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6cd4929310f6567fb678a3f40e2498388cc56a5448e2d2f52c602087358c61fe","version":2},{"created_at":"2026-06-13T17:07:44Z","element_count":88,"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}]}