> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/datadesigner/llms.txt.
> For full documentation content, see https://docs.nvidia.com/nemo/datadesigner/llms-full.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/datadesigner/_mcp/server.

# Engine Extension API

The `data-designer-engine` package provides the runtime layer of Data Designer. It consumes `data_designer.config` objects and maps them to execution behavior through generators, seed readers, processors, registries, model access, and MCP tool execution.

This section is intentionally curated. Use it for plugin implementation contracts, registry behavior, seed reader internals, processor execution, column generator bases, and MCP runtime behavior. It does not expose every internal engine module.