state.sql, at ~/.duckbrain/<instance>/.
OVERRIDE_DATA_PATH — the DuckLake catalog stores its data path internally.Guide
Instances
One brain per instance — hard physical isolation for multi-agent setups
Every instance is a fully separate brain: its own catalog, lake, sidecars, and
Two isolation levels: instances are physical (separate files — one per agent principal); namespaces/container-tags scope logically within an instance (per-workspace views of a shared brain).
Moving an instance directory requires re-init or