zigo

zigo keeps the Lua side of every boundary: SQL rows, FFI returns, network
packets, config and user input go through a schema that checks the value and
returns a safe one. Immutable fluent API, structured deterministic errors,
codegen for the valid path, network limits, 64-bit integers, UTF-8, cdata and
NULL sentinels, LuaCATS annotations, and direct interop with matchigo-lua.
Zero dependency.