{"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-dlssd15v","versions":[{"created_at":"2026-06-11T00:48:14Z","element_count":71,"note":"5軸GA polish 47->95 by M5 (autonomous)","saved_by":"mcp","sha256":"5174fc2a74c624f3225648a2b1cee8cb48685a7103a1cae5cfafd5b622f36724","version":15},{"created_at":"2026-06-10T22:05:25Z","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":"0ba1a929eafd4f30beb2ec614502135b07fbd7bf02f646d84d3538b6e8c31b6b","version":2}]}