{"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-silkmillhouse-clouccb0","versions":[{"created_at":"2026-06-10T22:53:43Z","element_count":66,"note":"legacy fix: jpy50261601→quote21228016 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b566a101376d5445b824cfaea2ee5631fd78d99fbbc983ee8133aac4908ee1fa","version":10},{"created_at":"2026-06-10T17:08:52Z","element_count":90,"note":"5軸GA polish 43->92 by M5 (autonomous)","saved_by":"mcp","sha256":"aafd8caabade64d67a55c990f4e26f721613955f83d3fd8f3ab8cb4da9a77e54","version":2}]}