{"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-7wqzhyhl","versions":[{"created_at":"2026-06-13T21:01:16Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"258095ea036d3d14d6564c6113029ba32631506f7b1921cacbd0eadd2e7429cf","version":3},{"created_at":"2026-06-13T20:53:40Z","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":"6a6aca2378787c6de41f1ecf7c2aa3497c9bc218f6454c44b8f8c295e06083d4","version":2},{"created_at":"2026-06-13T20:53:38Z","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}]}