{"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-kc466jjk","versions":[{"created_at":"2026-06-11T00:31:43Z","element_count":83,"note":"5軸GA polish 57->97 by M5 (autonomous)","saved_by":"mcp","sha256":"c35fb64266e8db75383a8e1a85f8317fa30faa08e2b250703cce909b43af3803","version":15},{"created_at":"2026-06-10T23:10:23Z","element_count":50,"note":"legacy fix: 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":"89877eb6f287f41a83e4794a1a62dddbce106034d2cf32c38ec14d2b55ec15f7","version":7}]}