{"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-50eqeu60","versions":[{"created_at":"2026-06-10T22:58:28Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63545472→quote22448917 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"88ee43a0a5b0d17ce3768e3ea96232111328de2c0e0cd6a8656e51e011f39287","version":9},{"created_at":"2026-06-10T20:07:34Z","element_count":72,"note":"5軸GA polish 54->90 by M5 (autonomous)","saved_by":"mcp","sha256":"cf50b16429877bdd501556c98c22791e86c76539b12c18313c5e0f68d0db015f","version":2}]}