{"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-eruavt2y","versions":[{"created_at":"2026-07-19T17:39:16Z","element_count":89,"note":"5軸GA polish 38->93 by M5 (autonomous)","saved_by":"mcp","sha256":"c482d422043c3c880eee475b2a6e0527e4fdc8972057e23ecec476ebcef0951c","version":3},{"created_at":"2026-07-19T17:36:17Z","element_count":86,"note":"loop3: 設計時延床 65.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c9034c0ff588e4b4ca2431ceb09441bd45d834134bcc86cf8a3cf799b61b77ed","version":2},{"created_at":"2026-07-19T17:36:17Z","element_count":86,"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}]}