{"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-ixr61anu","versions":[{"created_at":"2026-07-03T19:41:50Z","element_count":83,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"4db387b074d550b9dcc3a0c652464f4592db7dab80ed0edb55814e56533357a9","version":3},{"created_at":"2026-07-03T19:33:59Z","element_count":119,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6fdedd3399ea33ffc6ceb0e5ede172f178caf15d69a7cccd27f48128ff397b47","version":2},{"created_at":"2026-07-03T19:33:58Z","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}]}