> ## Documentation Index
> Fetch the complete documentation index at: https://www.plain.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# DependsOnThreadFieldInput

> Makes a thread field conditional on a sibling field's value. Nesting is capped at one level: `threadFieldSchemaId` must reference a field that does not itself depend on another thread field, otherwise the mutation fails with `cannot_create_thread_field_schema` (the dependent nesting level is too deep).