{"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-cdk7s7bk","versions":[{"created_at":"2026-06-10T22:54:05Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy52954560→quote22740658 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4ae0b75d0323bfad5b1f7621a744258dbc5106baeb528209285972e0b0a15df3","version":10},{"created_at":"2026-06-10T17:22:57Z","element_count":72,"note":"5軸GA polish 60->92 by M5 (autonomous)","saved_by":"mcp","sha256":"8d660aae09fc1d41ad6eb942a79517092279c518ff1e35b1b9cf4dcc49d90fbd","version":2}]}