Build: Add addon-mcp to internal UI Storybook

[JReinhold]

Closes #

What I did

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

Caution

This section is mandatory for all contributions. If you believe no manual test is necessary, please state so explicitly. Thanks!

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

🦋 Canary release

This PR does not have a canary release associated. You can request a canary release of this pull request by mentioning the @storybookjs/core team here.

core team members can create a canary release here or locally with gh workflow run --repo storybookjs/storybook publish.yml --field pr=<PR_NUMBER>

Summary by CodeRabbit

• New Features

  • Storybook now includes MCP (Model Context Protocol) addon integration for enhanced development capabilities.

• Chores

  • Added MCP server configuration for local development environment.
  • Added required addon dependency.

[github-actions]

	Fails
🚫	The "#### Manual testing" section must be filled in. Please describe how to test the changes you've made, step by step, so that reviewers can confirm your PR works as intended.

Generated by 🚫 dangerJS against 8174f82

[coderabbitai]

📝 Walkthrough

Walkthrough

Integrates MCP (Model Context Protocol) addon into Storybook by adding the addon to the Storybook configuration, installing the required package dependency, and configuring an MCP server endpoint in Cursor settings pointing to the local Storybook instance.

Changes

Cohort / File(s)	Summary
MCP Server Configuration .cursor/mcp.json	Adds storybook-ui MCP server configuration with endpoint http://localhost:6006/mcp.
Storybook Integration code/.storybook/main.ts	Registers @storybook/addon-mcp in the addons list.
Dependencies code/package.json	Installs @storybook/addon-mcp package with wildcard version resolution.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Manifests and MCP: Add e2e tests #33514: Adds MCP addon to sandbox templates and implements MCP end-to-end tests for Storybook integration.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@code/package.json`:
- Line 57: Replace the inconsistent version specifier for the
`@storybook/addon-mcp` dependency in package.json (the entry
"@storybook/addon-mcp": "*") with the workspace versioning style used by other
internal storybook addons ("workspace:*"); update the dependency string to
"@storybook/addon-mcp": "workspace:*" so it follows the monorepo dependency
management pattern.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: aa900409-4012-4145-ba7f-3b50d7a2054e

📥 Commits

Reviewing files that changed from the base of the PR and between e684125 and a5bc669.

⛔ Files ignored due to path filters (1)

• yarn.lock is excluded by !**/yarn.lock, !**/*.lock

📒 Files selected for processing (3)

• .cursor/mcp.json
• code/.storybook/main.ts
• code/package.json