{"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-bh4sulm0","versions":[{"created_at":"2026-06-10T23:56:42Z","element_count":73,"note":"5軸GA polish 54->95 by M5 (autonomous)","saved_by":"mcp","sha256":"b79de30b4da6a5addba75942e57b3fa83a455dad69da3bdd047c069cb4307856","version":12},{"created_at":"2026-06-10T23:09:45Z","element_count":44,"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":"a1c4418e236b08b58771bd190284b087d29d81e2980011ca222215e196a17bfc","version":7}]}