{"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-cd6r5oe4","versions":[{"created_at":"2026-06-10T23:00:42Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84287347→quote21081401 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8e4e4095a9c8b81c8f5da78621420417255b1f2cb30c3591e870c842c1973cb0","version":9},{"created_at":"2026-06-10T21:43:57Z","element_count":91,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"6edb7c4cda5b3743df5fd41efa8be7c39a42b0b44dcd090749122de60533ee19","version":3}]}