{"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-c4ltbtxx","versions":[{"created_at":"2026-06-10T22:52:41Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21673268 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"eef27a129c553e716aefe6daf336fb5da1a8775f50e293748b2d9945d1c0af4e","version":13},{"created_at":"2026-06-10T15:19:14Z","element_count":73,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"4cbe241aeef26dc0dc4eb61365053fbd1a32e7d2102e2557c455b908da6d327d","version":5}]}