{"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-9i84kwls","versions":[{"created_at":"2026-06-13T20:29:35Z","element_count":73,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"9e04dbdc1c6cc044c9ec136cd469d4ab295a944b72f16ea790a0b1db332adecc","version":3},{"created_at":"2026-06-13T20:24:48Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"caa1eae6dd912e121a01fd2981494b1986c4f5dd5503f7b6aaf7bb210b3931c9","version":2},{"created_at":"2026-06-13T20:24:45Z","element_count":119,"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}]}