{"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-2l290bts","versions":[{"created_at":"2026-07-15T01:57:27Z","element_count":83,"note":"5軸GA polish 42->94 by M5 (autonomous)","saved_by":"mcp","sha256":"0a82de920391ff863748a2f610430d15c3d4c9b8cfb9c26264e263f18ac05a39","version":3},{"created_at":"2026-07-15T01:50:40Z","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":"af402ddbe3ff7713efec27a0356efde6b272b41bb2397c6b1e129f06f66c748f","version":2},{"created_at":"2026-07-15T01:50:40Z","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}]}