{"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-h34ruymb","versions":[{"created_at":"2026-07-06T19:43:35Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b70145caee19373e80495571794c2fbc9f511f310650222a9ddfadc417a25561","version":3},{"created_at":"2026-07-06T19:39:36Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5913344d7d3437a03d986105ef93f03a604de1921317317cdc4792ad9a647ee5","version":2},{"created_at":"2026-07-06T19:39:36Z","element_count":130,"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}]}