{"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-kn646jg7","versions":[{"created_at":"2026-06-10T22:57:57Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy69320160→quote24405825 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"05a3cd69287a9ec033e038a476c94e54659e8b72dd09f8f668ad5bebc7de70e7","version":9},{"created_at":"2026-06-10T19:50:58Z","element_count":72,"note":"5軸GA polish 60->93 by M5 (autonomous)","saved_by":"mcp","sha256":"a27d6f4b5e9e0226a64ca171e7733a8b5145377f149d13e040252d100c539d39","version":2}]}