Module preflight 

Read-only configured Lake prerequisites. These checks never open DuckDB, attach a catalog, resolve credentials, or create scratch/TLS files.

Enums

StorageEndpoint

The endpoint selected by an Effective storage policy; no storage credential or workload-identity discovery is involved in a reachability check.

Functions

filesystem_storage_accessible

Checks readable directory access through a container-visible absolute path. Every component is opened without following symlinks. Success establishes directory access only, not write permission or analytical adapter readiness.

storage_endpoint_reachable

Checks TCP reachability only. Call inside a bounded diagnostic worker: DNS may block beyond the socket timeout. No HTTP request or TLS handshake occurs.