The following libraries are required to use popular Hugging Face time series forecasting models in LEAN algorithms:

• uni2ts — required to use Salesforce/moirai-1.0-R-small/base/large, the Moirai universal time series foundation model
• momentfm — required to use AutonLab/MOMENT-1-large, the MOMENT time series foundation model
• tsfm_public — required to use ibm-granite/granite-timeseries-ttm-r1, IBM's Granite Tiny Time Mixer

These packages cannot be installed at backtest runtime because the QC Cloud backtest environment does not have outbound network access. They need to be pre-installed in the Python environment alongside existing ML libraries like chronos, transformers, and torch.

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