{"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-avygbyil","versions":[{"created_at":"2026-06-18T19:22:35Z","element_count":71,"note":"5軸GA polish 42->92 by M5 (autonomous)","saved_by":"mcp","sha256":"90b842fc098322f3076c244331264a537487294bc234b34cee97a1fcef4fd1be","version":3},{"created_at":"2026-06-18T19:20:13Z","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":"e40894548b9eff15a4633b1855b11f17ee46bc8e71b79a1e712e3631a0b25865","version":2},{"created_at":"2026-06-18T19:20:10Z","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}]}