{"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-famgfa2j","versions":[{"created_at":"2026-06-10T23:00:35Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84287347→quote22302745 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8d325ae2748099c522257862fd8dfa1650c76ec8638ce2765dec34863976b647","version":9},{"created_at":"2026-06-10T21:28:12Z","element_count":89,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"c3de88349bf5628181645fc7e7b05f90408441930f6b4bb2e67ce5999a618470","version":3}]}