{"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-bxk9vqbi","versions":[{"created_at":"2026-06-15T19:36:55Z","element_count":90,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"8d39db6c30acd626eb01efe9aca9e5ed846d68b3a3453a10cf238747a987c2b0","version":3},{"created_at":"2026-06-15T19:32:03Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"1d51c4ddf16daa63a333be69b052499dcc6e3af884a4e0b4382753f57cfc2b3f","version":2},{"created_at":"2026-06-15T19:32:02Z","element_count":85,"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}]}