{"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-8swjgwwj","versions":[{"created_at":"2026-06-10T22:55:24Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84287347→quote21425095 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"efeb2220524b6992bca5108da5a6d5c9b59320e579622495e43d04b76935f8ad","version":10},{"created_at":"2026-06-10T18:13:54Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f6431b23cd2dd38052c4004313f88b7673f2548b9b2f5ec896255d8cb85342f7","version":3}]}