{"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-m3nqo2p8","versions":[{"created_at":"2026-06-10T22:57:49Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy53236569→quote21093533 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"65235f6932187aa9930e9ac4eddfa0b0293333f351f56e3eea545a6b594e7750","version":9},{"created_at":"2026-06-10T19:34:25Z","element_count":84,"note":"5軸GA polish 60->94 by M5 (autonomous)","saved_by":"mcp","sha256":"50465dcdbb62ccfc5327d0661be6d1862ce6fbb9884e89afd09b373da9e79aff","version":2}]}