January 2025 monthly summary focused on delivering extensible streaming capabilities, configuration improvements, and development-cycle readiness across mosaicml/streaming and mosaicml/llm-foundry. Delivered registry-based Stream creation within StreamingDataset, enabling custom Stream implementations to be registered and instantiated via stream_name and stream_config, reducing the need for library-level changes for new data sources. Coordinated cross-repo enhancements by upgrading mosaicml-streaming to 0.11.0 and exposing new parameters to StreamingFinetuningDataset and StreamingTextDataset for more flexible data streaming configurations. Completed a development-cycle readiness step with a version bump to 0.12.0.dev0 on main to mark the upcoming cycle. No explicit bug fixes were documented in this period; the month prioritized feature delivery, configurability, and stability improvements that enable faster experimentation and broader adoption.