> 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.

# Code Reference

Data Designer is implemented as three installable packages that share the `data_designer` namespace.

| Package                | Namespace                 | Role                                                                                          |
| ---------------------- | ------------------------- | --------------------------------------------------------------------------------------------- |
| `data-designer-config` | `data_designer.config`    | Configuration schemas, builder APIs, plugin registration objects, and result schemas.         |
| `data-designer-engine` | `data_designer.engine`    | Runtime extension contracts for generation, seed reading, processing, and MCP tool execution. |
| `data-designer`        | `data_designer.interface` | Public entry points for previewing, creating, and inspecting generated datasets.              |

The dependency direction is `interface -> engine -> config`. Config objects describe what should happen, engine objects implement how it happens, and interface objects expose the supported public API.