DataDesigner/docs/code_reference/config/seeds.md
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# Seeds
Seed configs declare existing data used as input during generation. A [SeedConfig](#data_designer.config.seed.SeedConfig) combines a seed source with optional row sampling and selection settings. Seed source objects declare where seed data comes from; the engine reads them through seed readers.
Use these objects with `DataDesignerConfigBuilder.with_seed_dataset()`. Related pages: [Seed Datasets](../../concepts/seed-datasets.md) and [seed readers](../engine/seed_readers.md).
Built-in seed sources include local files, Hugging Face paths, in-memory DataFrames, directories, file contents, and agent rollout traces. Plugin seed sources can extend the same discriminated union through the plugin system.
## Seed Config
::: data_designer.config.seed
## Built-In Seed Sources
::: data_designer.config.seed_source
## DataFrame Seed Source
::: data_designer.config.seed_source_dataframe