{"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-hjxzrgsc","versions":[{"created_at":"2026-06-18T19:46:14Z","element_count":84,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"75aa02860143f10c063c1c9d77d6928f9a05e46d2ec05c66c90e50c966eedcf9","version":3},{"created_at":"2026-06-18T19:34:36Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"763e1826bbc7f6fa384c7c762b92690b418df732a57105efa9e1482563c52063","version":2},{"created_at":"2026-06-18T19:34:34Z","element_count":87,"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}]}