{"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-nzuw1jer","versions":[{"created_at":"2026-06-10T22:52:25Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21376510 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f1f715e7a4c3e914b4c1e1d3b11da6e41c3ea050f31af574cae3644933dbc4b9","version":23},{"created_at":"2026-06-10T13:30:41Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積93.5㎡(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":"bfb2546b434028e4f32159bcef59a742b0b08485802e5cb7ed49cf86ff7123d8","version":9},{"created_at":"2026-06-10T11:59:59Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"92756cc64270b9a633d3d0f1bdb29ce4f65e11993af4c91dc15ab54052258b15","version":4}]}