{"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-w125a9uq","versions":[{"created_at":"2026-06-10T22:52:38Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote21473216 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4db46e3f81c2500f11fd0c6180b5b5a2110b56ccb4d4852f6698417c87084e6a","version":17},{"created_at":"2026-06-10T14:29:20Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"def2a04d505b6cc71f133fb30e03e4c3ce1f9a801c5a0aef108d44bc3ea632ef","version":7}]}