marketplace-build-component
Builds UI components using the Blok design system for Sitecore Marketplace apps. Use when the user wants to create UI, add components, build a page layout, or work with Blok/shadcn components in a marketplace app.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/vercel-labs/sitecore-skills --skill marketplace-build-component- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads marketplace-build-component automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Build UI with Blok Design System
You are helping the user build UI components for a Sitecore Marketplace app using the Blok design system (Sitecore's shadcn-based component library).
Key Principles
- Always use Blok components — they match the Sitecore host UI and support light/dark themes automatically
- SDK data integration — use loading states (Skeleton) and error states (Alert) when fetching SDK data
- Extension point awareness — different extension types have different UI constraints (see below)
- Responsive — components render inside iframes of varying sizes
Installing Components
Blok components are installed via the shadcn CLI:
# Install the Blok theme (required first)
npx shadcn@latest add https://marketplace-sdk.sitecorecloud.io/r/blok-theme.json
# Install individual components
npx shadcn@latest add https://marketplace-sdk.sitecorecloud.io/r/<component-name>.json
See blok-components.md for the full component catalog with install commands.
UI Patterns by Extension Type
Compact Field (custom-field)
- Very limited space (~300px wide, variable height)
- Use: Input, Select, Badge, small inline components
- Avoid: Tables, large layouts, modals
Dashboard Widget
- Medium space (~400x300px default, resizable)
- Use: Cards, Charts, Stats, compact Tables
- Good for: Summary data, quick actions
Pages Context Panel
- Side panel (~350px wide, full height)
- Use: Vertical layouts, Lists, Accordion, Tabs
- Good for: Contextual info about current page, actions
Fullscreen
- Full viewport within the Sitecore shell
- Use: Any components, complex layouts, Tables, Forms
- Good for: Full CRUD interfaces, dashboards, settings
Standalone
- Independent page, not in Sitecore shell
- Use: Any components, full creative freedom
- Good for: Public-facing pages, OAuth callbacks
SDK Data Integration Pattern
"use client";
import { useEffect, useState } from "react";
import { useMarketplaceClient, useAppContext } from "@/components/providers/marketplace";
import { Skeleton } from "@/components/ui/skeleton";
import { Alert, AlertDescription } from "@/components/ui/alert";
export function MyComponent() {
const { client } = useMarketplaceClient();
const appContext = useAppContext();
const [error, setError] = useState<string | null>(null);
const loading = !appContext;
if (loading) return <Skeleton className="h-32 w-full" />;
if (error) return <Alert variant="destructive"><AlertDescription>{error}</AlertDescription></Alert>;
return <div>{/* Render data */}</div>;
}
Reference Files
- Blok Components — Full component catalog with install commands
FAQ
What does the marketplace-build-component skill do?
Builds UI components using the Blok design system for Sitecore Marketplace apps. Use when the user wants to create UI, add components, build a page layout, or work with Blok/shadcn components in a marketplace app.
How do I install marketplace-build-component?
Run npx skills add https://github.com/vercel-labs/sitecore-skills --skill marketplace-build-component in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/marketplace-build-component/ (personal) or .claude/skills/marketplace-build-component/ (project).
Which AI agents can use marketplace-build-component?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is marketplace-build-component safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains marketplace-build-component?
It is published by vercel-labs in vercel-labs/sitecore-skills, and it is an official skill from the maker of the technology it covers. It has 61 recorded installs.
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