{"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-y0anj7ro","versions":[{"created_at":"2026-06-16T06:11:56Z","element_count":83,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"93bcce4d34ee9e62e1c1f2a61b7628ce7bfe10bd2c8f6c7b006c3f5e62dffa15","version":3},{"created_at":"2026-06-16T06:09:31Z","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":"749bbd4567f350425814830eadd21ea0b41eeb496668f2d5c61aa268b0920e23","version":2},{"created_at":"2026-06-16T06:09:29Z","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}]}