{"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-3hv7oke5","versions":[{"created_at":"2026-07-13T10:37:35Z","element_count":91,"note":"5軸GA polish 41->98 by M5 (autonomous)","saved_by":"mcp","sha256":"1f86fddb0ecc5cee8e6464ac4610ab4d249f27d7ef81d9a2ba077ca273aae061","version":3},{"created_at":"2026-07-13T10:28:19Z","element_count":126,"note":"loop3: 設計時延床 42.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"38612356b2ddb663c8f49fe51042c3da7d40aeef7dde1cc923a6f83bce15fda6","version":2},{"created_at":"2026-07-13T10:28:19Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}