{"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-newhailescourthouse-8i46amma","versions":[{"created_at":"2026-06-10T22:53:51Z","element_count":85,"note":"legacy fix: jpy64680595→quote20863604 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"066ecb36d9f73401e6684b0b73e5c8b2e5522ac71bfc8846a726a3e78f545588","version":10},{"created_at":"2026-06-10T17:08:46Z","element_count":90,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"cca43ca550df979c7d0c40fe821ed9ddd09e3a8fe7ac59e0a485b524ba77d264","version":2}]}