{"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-eed5wilj","versions":[{"created_at":"2026-06-16T19:39:23Z","element_count":89,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"8e716762cf00541ca258106675f924690e39e0fdecac0605edf92df1284fa1dc","version":3},{"created_at":"2026-06-16T19:29:10Z","element_count":84,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"38dea89cafd3ed707386332d1d9f56d99d944989a9b78fa29beaa355618e3a89","version":2},{"created_at":"2026-06-16T19:29:10Z","element_count":84,"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}]}