{"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-acrpqdnh","versions":[{"created_at":"2026-06-10T23:05:56Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote19504363 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"33d9c23ee0af50b104a344c907f3d6f8183fab944ba73cf54989416f136f8fd4","version":9},{"created_at":"2026-06-10T22:17:16Z","element_count":89,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"99114df108b8b5baf1c38a8b0a529a3e3b6482eb7206b46a3b79fc6aadbf70cb","version":4}]}