{"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-z0lulysw","versions":[{"created_at":"2026-06-22T19:39:30Z","element_count":72,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"c0b4a4305ad7727c126ff33ba31f8120f36a6672ca626c94442becae45780473","version":3},{"created_at":"2026-06-22T19:28:24Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"67dc933261bfb534fac64ecdd9bbd4c42a285b7c8ea6368aa90248464de7e2ef","version":2},{"created_at":"2026-06-22T19:28:23Z","element_count":105,"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}]}