{"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-y981pmnl","versions":[{"created_at":"2026-06-11T00:31:42Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"0a206271d21d002ee8ab3856e6c08e10d2827f01f7d96ea901376ee29ed82b1c","version":15},{"created_at":"2026-06-10T23:10:32Z","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":"34dd27b14b08b921f07e06d0217d91498accc75843b1da13b3367c253d25e0ae","version":7}]}