LoongSuite Util GenAI

LoongSuite GenAI Utils is a utility package for generative AI workloads within the LoongSuite ecosystem. Version 0.4.0 is the latest, released as part of the loongsuite-python-agent distribution. The package provides utilities such as the RetrievalDocument dataclass for typed retrieval document representation. Release cadence follows the loongsuite-python-agent releases (currently every few months).