{"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-cr203s47","versions":[{"created_at":"2026-06-10T22:52:40Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20131232 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"dbf400ad8ca35b1a1b5a95063869a56349f682acd2cdd3002e48e21f3d49456a","version":15},{"created_at":"2026-06-10T15:03:44Z","element_count":70,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"a6a6002d07a5cdf5f0f3b83155f56511b0d746d370d5aa1a762f848a153b1c26","version":7}]}