{"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-fn5rcmi1","versions":[{"created_at":"2026-06-10T22:52:20Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63326340→quote25566701 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"165c640de9501f91e49f9c8182a2c9650d1e58c6c9d8937e31aca8cd9874699d","version":25},{"created_at":"2026-06-10T13:24:34Z","element_count":65,"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":"c153f5d3f987febde5284798040654eea10bda1a8724aa60280c43090f4a6176","version":10},{"created_at":"2026-06-10T10:53:25Z","element_count":90,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"713bb2d18456c34b6d83b8012927dbab089637dbf40084de2e298d2bf93f45e4","version":3}]}