{"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-a2bdhk2w","versions":[{"created_at":"2026-06-10T23:23:55Z","element_count":90,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4a0cd40621dc9990d03ecf7d02592191985a6d25b006b4a413cec16142b24c63","version":10},{"created_at":"2026-06-10T23:08:37Z","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}]}