{"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-0d7i0brc","versions":[{"created_at":"2026-07-08T19:41:17Z","element_count":90,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"61d26b2fe4a8857e3e441046d1212dc797d4dca3b713938cd09b4b68df5e7dc2","version":3},{"created_at":"2026-07-08T19:32:44Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b9264e54995b2fe10411a2625590e57ee1c6a27acaf13ac05b253685b4f3e2a4","version":2},{"created_at":"2026-07-08T19:32:44Z","element_count":126,"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}]}