{"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-wypx3lh0","versions":[{"created_at":"2026-06-11T03:44:08Z","element_count":84,"note":"5軸GA polish 41->98 by M5 (autonomous)","saved_by":"mcp","sha256":"52d85c1a0206f9dc643c2dc6c554f24ccbc59d0c7821557ac60fba2e7dfd515a","version":3},{"created_at":"2026-06-11T03:37:57Z","element_count":111,"note":"loop3: 設計時延床 42.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"53a794aa144d14d5fa47e9c206a5b9de77ecf7cf561e3e8ddc66eb16bea49114","version":2}]}