Root package provides typed DuckDB helpers:

import duckdb "vendor/duckdb"

• open, connect, close, and disconnect manage ownership.
• execute accepts typed Query_Param values.
• query fills tagged structs into dynamic arrays.
• prepare, bind, step, value, and destroy helpers support manual statements.
• last_error returns the last operation's borrowed error text.

Query results own cloned strings and blobs. Delete those fields, then delete the result array after use.

Raw C bindings live in vendor/duckdb/raw:

import duckdb_raw "vendor/duckdb/raw"