# ConfigurableFieldSpec

> **Class** in `langchain_core`

📖 [View in docs](https://reference.langchain.com/python/langchain-core/runnables/utils/ConfigurableFieldSpec)

Field that can be configured by the user. It is a specification of a field.

## Signature

```python
ConfigurableFieldSpec()
```

## Extends

- `NamedTuple`

## Properties

- `id`
- `annotation`
- `name`
- `description`
- `default`
- `is_shared`
- `dependencies`

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/9f232caa7a8fe1ca042a401942d5d90d54ceb1a6/libs/core/langchain_core/runnables/utils.py#L622)