{"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-lg4nsr2j","versions":[{"created_at":"2026-07-07T19:24:34Z","element_count":89,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"e345243bd095ce05d9ffde89e678001e5886a7b13a282135f067e7386f0458da","version":3},{"created_at":"2026-07-07T19:18:59Z","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":"da27aeec1b78ccee08cd3e8647231902b5cce7f4d8783229b04d6a5e74982b36","version":2},{"created_at":"2026-07-07T19:18:59Z","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}]}