{"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-fpqk2v2z","versions":[{"created_at":"2026-06-21T06:18:53Z","element_count":84,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"44f463c16b6a3116ae9750ea258ff8f630ecbf2ebc1600be2ac990d8945ec976","version":3},{"created_at":"2026-06-21T06:08:45Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e9f329bb566c3ca9b882b1f7cc2db2f061d58ef41f95122880a5abbdf34268e8","version":2},{"created_at":"2026-06-21T06:08:44Z","element_count":83,"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}]}