{"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-5upxgwis","versions":[{"created_at":"2026-06-10T22:58:42Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"735079a543902615aa62d3adb0d22cc09fb9fa22a4efec495df28c41a2a54ffd","version":9},{"created_at":"2026-06-10T20:07:14Z","element_count":89,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"d2d616d04c5f2f6eb6fc09a3c3480468101b7f0ae4d5caec25b32605ae2694aa","version":2}]}