{"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-taravceh","versions":[{"created_at":"2026-06-11T00:48:16Z","element_count":91,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3b202953146526837c3556c2a5022cf4bcccf13490ed78126cfc70f4e1ed8e99","version":15},{"created_at":"2026-06-10T22:03:50Z","element_count":54,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c4327c341c7949f5f5518a676957a735a68418fae19af3d2efec1eb236c881a0","version":2}]}