Prefab UI

Prefab is a Python DSL for building interactive React UIs. You compose components using context managers, wire up actions as Pydantic models, and wrap everything in a PrefabApp.

This skill covers patterns and layout. For component-specific API details (props, variants, examples), use the component search tool with detail=True.

Core Pattern

from prefab_ui.app import PrefabApp
from prefab_ui.components import Column, Heading, Input, Button, Badge
from prefab_ui.components.control_flow import If
from prefab_ui.actions import ShowToast
from prefab_ui.actions.mcp import CallTool