{"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-u6znvsmh","versions":[{"created_at":"2026-06-10T22:52:26Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21475211 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"18eb8dd92e11549ba76852ede10afc23e64dd5acd6b9944eec0c4339ccb29192","version":22},{"created_at":"2026-06-10T13:31:41Z","element_count":65,"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":"e5e9957374cb87185d3f0c10f43b3c4699634806af44ae727c2bbf0b0ff6846f","version":8},{"created_at":"2026-06-10T12:16:02Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c84a679c74e8a334deadc13972153572ddac75613f199794934ea38fd510ea64","version":4}]}