{"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-80xotax0","versions":[{"created_at":"2026-06-29T19:38:17Z","element_count":68,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"6055d23f6bf1c0c1a68873a7a919b1767fd4256532b6854ef5571b5a282edd63","version":3},{"created_at":"2026-06-29T19:32:00Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"1779ed36b9f2f40253c0acb72a0f1a8d595e08e813cb74ff9470529a764ba05c","version":2},{"created_at":"2026-06-29T19:32:00Z","element_count":85,"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}]}