{"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-u3gf9nmy","versions":[{"created_at":"2026-06-11T00:31:35Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"0a206271d21d002ee8ab3856e6c08e10d2827f01f7d96ea901376ee29ed82b1c","version":15},{"created_at":"2026-06-10T23:10:36Z","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":"190a1b64da7aa4e3b424f9b4fceb4b06cb8c618bf37af7b3cfa388fda03d2edc","version":7}]}