{"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-eb6mex7o","versions":[{"created_at":"2026-06-10T23:06:15Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote20018747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a309e480e37d3810b4e028c0e3a1300441f5becfc43d7e984bc1a8f79ec5fedd","version":9},{"created_at":"2026-06-10T22:34:48Z","element_count":84,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4d607187ecd949aef2baa6fc821a96b2ef7e567bfde67e3a852f08123c59126f","version":6}]}