{"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-f0qljsax","versions":[{"created_at":"2026-06-13T14:07:57Z","element_count":84,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"e34f29986452954cdff331740aba95385761719b7c26bd4fb3f7bdcb07be748d","version":3},{"created_at":"2026-06-13T14:05:08Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f0eee42a0057c442afbafb49797af41911144c596bb70cbe76adc837589c956f","version":2},{"created_at":"2026-06-13T14:05:07Z","element_count":126,"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}]}