> For AI agents: the complete documentation index is available at https://mfeflow.github.io/mfeflow/llms.txt, the full documentation bundle is available at https://mfeflow.github.io/mfeflow/llms-full.txt.

# MFEFLOW_E402

The registry returned something that is not a feature.

## Fix

Ask the registry owner to check the entry. It must be a feature.json document.