{"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-59ojdiwj","versions":[{"created_at":"2026-06-10T22:52:43Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote21228143 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"eeca244649544c0f83c9ffb46208101efa48adc36884ba16e4d62f735fb1b207","version":12},{"created_at":"2026-06-10T15:36:48Z","element_count":83,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"47ef2f40f737c472599f90ddbf1f6e5136b8c9e4f2f30d276860ffa6e96f5b62","version":4}]}