{"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-cp25m2v2","versions":[{"created_at":"2026-06-10T22:54:22Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87413760→quote22379006 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"045bc71bf6b616b4419df1b320fcf867e279982917e73966e9e47e77d7fe63b2","version":10},{"created_at":"2026-06-10T17:39:50Z","element_count":72,"note":"5軸GA polish 58->95 by M5 (autonomous)","saved_by":"mcp","sha256":"ad026aabb37fda612d6aea2af907ed42ef11d949b3fb1e47cc7dab71dd7a586f","version":3}]}