{"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-petterhillhouse-4lk5ksib","versions":[{"created_at":"2026-07-01T06:56:34Z","element_count":88,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"2ac68a0ac6d5852670c8f16236a6fe4cb22091fa63ea9cea61dc01a0870761a5","version":3},{"created_at":"2026-07-01T06:47:41Z","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":"f295e72ea5650eed377ef57a3960bd6bc3497f4dd05f053a849447e532c5bd2f","version":2},{"created_at":"2026-07-01T06:47:41Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}