{"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-wtliehi5","versions":[{"created_at":"2026-07-19T17:39:16Z","element_count":83,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"45abd5feedfb3ba08a55037dc32bae9095809451c6502b5a7964b92b33c22c5f","version":3},{"created_at":"2026-07-19T17:30:47Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"df14ce506987d05cbd205cc40f4a97d847a52dcbec61bb0d7f0875271be87ed8","version":2},{"created_at":"2026-07-19T17:30:47Z","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}]}