{"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-lwn8uowi","versions":[{"created_at":"2026-06-10T23:58:02Z","element_count":84,"note":"5軸GA polish 50->97 by M5 (autonomous)","saved_by":"mcp","sha256":"c6e1436eeb389a71082f291b4a459ea9ec4fa0b1a217ed34bd31da1df309bc92","version":13},{"created_at":"2026-06-10T23:09:53Z","element_count":54,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ce1e2fe1e4a007c144fb2a83e619a4d2303ed3b74b8a60ceddc49943cad5bb7a","version":7}]}