{"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-3k1flog6","versions":[{"created_at":"2026-07-05T17:59:20Z","element_count":73,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"9f4b166973b3a7ddb390606483956c0f06f6d1b869ed5ffac2cb2c188a9eba61","version":3},{"created_at":"2026-07-05T17:53:56Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"1423f6071c41a0b1f0b73472518306068908bf4976c6666c4eb8f3e9d05af349","version":2},{"created_at":"2026-07-05T17:53:56Z","element_count":90,"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}]}