Hydra

Hydra (Meta) is a configuration framework for Python applications. Composes configs from multiple sources, supports CLI overrides, type-safe structured configs, and object instantiation. Built on OmegaConf. Version: 1.3.x.

Used extensively in ML: verl, NeMo, fairseq, Detectron2, PyTorch Lightning CLI, and many training frameworks.

Config Structure

Directory Layout