{"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-xvzpv44a","versions":[{"created_at":"2026-06-10T22:52:27Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote21268722 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e9243b1a8e9d2794d5850421a82ce5c0578a17f2434482f0a31a3456601be0c7","version":21},{"created_at":"2026-06-10T13:32:15Z","element_count":65,"note":"backfill: 延床=居室床スラブ実面積93.9㎡(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":"1145e9aa0d2d713a2d4e4a8d2c736fe90b0427db2ef333f10abc04fce3f762f0","version":7},{"created_at":"2026-06-10T12:16:03Z","element_count":84,"note":"5軸GA polish 58->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c74d7df064c2526c7f6f8aa82eb21ee2a263640a2c366540718c7f7d82e35b32","version":3}]}