{"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-ifwy8k64","versions":[{"created_at":"2026-06-10T22:57:49Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy77508285→quote21192161 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"cbed5151b39f6bc16b0a3da39a8fb10a42f470384f6b9f40e8ad92d5d0950b02","version":9},{"created_at":"2026-06-10T19:34:23Z","element_count":84,"note":"5軸GA polish 45->97 by M5 (autonomous)","saved_by":"mcp","sha256":"92c567edbf8c63c050c03b1193bdd3291c85f0c5104096223292741066dcac66","version":2}]}