{"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-0pnf36iz","versions":[{"created_at":"2026-06-10T23:39:50Z","element_count":89,"note":"5軸GA polish 50->98 by M5 (autonomous)","saved_by":"mcp","sha256":"15fcca60018206d2306acd9c8c486884c5c33fe0c2965ae84624864aa2a4c41f","version":11},{"created_at":"2026-06-10T23:09:08Z","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":"c6d7e71e21e97d6c5d0fb2d9d22cb9b96f998d620f10b9a49fb2be21c931b8f9","version":7}]}