{"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-3t9pds4g","versions":[{"created_at":"2026-06-10T22:52:41Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote21298992 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"53d2e493e834da4aae01c6188d58078fdc48e512afa2c7e9089c7eb547ce1cf9","version":14},{"created_at":"2026-06-10T15:03:45Z","element_count":85,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f88052bc0f242ca87c99b5040b5dbc96bb9130dff5c3abb3e6ba444c29b8d0fc","version":6}]}