{"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-l3i4rr4l","versions":[{"created_at":"2026-06-10T13:11:40Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積118.8㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"fd36dcc236f8c4efef0623780f3ff0f2dc3a534240835102e091aa2f3892eff6","version":12},{"created_at":"2026-06-10T08:32:14Z","element_count":49,"note":"revert: GA design failed production houki (M5)","saved_by":"mcp","sha256":"0258d7121bc315c53fe7c08429083eb949b8580b6cd37e128fb663248990fe06","version":4},{"created_at":"2026-06-10T08:32:12Z","element_count":90,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"591519640fb3e5c9168fe0d0c9b25eb8094051a74fba26b434c9491104ceb8f8","version":3}]}