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The Duck Is Plural Now: A Quack Deep Dive

DuckDB has always been a single-process, embedded engine - extraordinary at what it does, and silently solitary. Quack puts a small network surface on top of that engine so two (or twenty) DuckDB processes can mount each other's catalogs and query each other's tables as if they were local. The defining choice is that it does this inside DuckDB, not around it: same wire format, same type system, same SQL. We stood up two servers, pointed them at each other, and went looking for where that one decision quietly decides everything else.

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