{"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-or2p2job","versions":[{"created_at":"2026-06-10T07:59:33Z","element_count":89,"note":"5軸GA polish 40->98 by M5 (autonomous)","saved_by":"mcp","sha256":"06959d6d6599afa7a655ec795d7410655423f6c5f9c1d5c84ec61917291921a2","version":2}]}