anecdotes Custom Fields API
**Custom fields** extend platform resources (including **requirements**) with your own **dropdown**, **multi-select**, or **free-text** values. These endpoints manage the field **definitions** — create one, list them, and read a single definition to discover its **`field_metadata.values`** (the `{option_id: label}` map used when setting dropdown / multi-select values). Field definitions are shared across resource types; scope a field to requirements with **`resource_types: ["REQUIREMENT"]`**.