{"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-o4vzku2r","versions":[{"created_at":"2026-07-17T19:41:21Z","element_count":69,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"e25b18aa5b3ad4286f5800d640d83e1adad358f2762762e93a462c8401fd3961","version":3},{"created_at":"2026-07-17T19:30:23Z","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":"9444d68cadb8b447d2e6c05fd144b9a605334975e1ba52c50ef8210ffaebb940","version":2},{"created_at":"2026-07-17T19:30:23Z","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}]}