MCPInstall

marketplace-add-extension

Adds a new extension point route to a Sitecore Marketplace app. Use when the user wants to add a custom field, dashboard widget, context panel, fullscreen page, or standalone route.

Installs
56
Last 24h
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Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/vercel-labs/sitecore-skills --skill marketplace-add-extension
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads marketplace-add-extension automatically when relevant.

  3. 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.

Add an Extension Point Route

You are helping the user add a new extension point to their Sitecore Marketplace app.

Step 1: Determine Extension Type

Ask the user which type (or infer from $ARGUMENTS):

TypeSlugDescriptionTypical Size
Custom Fieldcustom-fieldInline field in content editor~300px wide
Dashboard Widgetdashboard-widgetWidget on the dashboard~400x300px
Pages Context Panelpages-context-panelSide panel in Pages editor~350px wide, full height
FullscreenfullscreenFull-page within Sitecore shellFull viewport
StandalonestandaloneIndependent pageFull viewport

Step 2: Generate the Route

Create the route at app/<extension-type>/page.tsx (or a custom path the user prefers).

See extension-types.md for complete boilerplate templates for each extension type.

Step 3: Register in Developer Portal

Remind the user to register the extension point in the Sitecore Developer Portal:

  1. Go to Developer Portal → Your App → Extension Points
  2. Click "Add Extension Point"
  3. Select the type and set the route path (e.g., /custom-field)

Step 4: Suggest Next Steps

  • Use /marketplace-build-component to build out the UI
  • Use /marketplace-sdk-reference to look up available queries/mutations for this extension type
  • Use /marketplace-add-xmc if the extension needs XM Cloud data

Reference Files

  • Extension Types — Boilerplate templates for each extension type

FAQ

What does the marketplace-add-extension skill do?

Adds a new extension point route to a Sitecore Marketplace app. Use when the user wants to add a custom field, dashboard widget, context panel, fullscreen page, or standalone route.

How do I install marketplace-add-extension?

Run npx skills add https://github.com/vercel-labs/sitecore-skills --skill marketplace-add-extension 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-add-extension/ (personal) or .claude/skills/marketplace-add-extension/ (project).

Which AI agents can use marketplace-add-extension?

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-add-extension 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-add-extension?

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 56 recorded installs.

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