[danpeen]

Summary

Add MCP Apps support to Modern.js, connecting server-side tools with interactive React cards through the MCP protocol.

• Add @modern-js/mcp-apps and @modern-js/plugin-mcp-apps, with automatic /mcp registration through BFF for tool discovery, execution, and UI resource delivery
• Build local React cards using Modern.js multi-entry builds and support remote components through Module Federation
• Provide UI-only builds and a versioned UI manifest for independently managed MCP servers
• Add a development debugger with automatic connection, schema-based argument templates, card previews, local simulation, and request logs
• Add MCP Apps, MF, and tool-only MCP Server scaffolding with greeting, calculator, and task board examples
• Document configuration, integration, interactions, debugging, and deployment in English and Chinese

Checklist

• I have added changeset via pnpm run change.
• I have updated the documentation.
• I have added tests to cover my changes.

[netlify]

✅ Deploy Preview for modernjs-byted ready!

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Lighthouse	1 paths audited Performance: 99 (🟢 up 11 from production) Accessibility: 100 (no change from production) Best Practices: 100 (no change from production) SEO: 91 (no change from production) PWA: - View the detailed breakdown and full score reports
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[changeset-bot]

🦋 Changeset detected

Latest commit: 2040740

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 124 packages

Name	Type
@modern-js/mcp-apps	Minor
@modern-js/mcp-apps-inspector	Minor
@modern-js/plugin-mcp-apps	Minor
@modern-js/create	Minor
@modern-js/runtime	Minor
mcp-apps	Patch
@modern-js/sandpack-react	Minor
@modern-js/plugin-bff	Minor
@modern-js/plugin-styled-components	Minor
@modern-js/plugin-i18n	Minor
@integration-test/alias-set	Patch
app-document	Patch
async-entry-test	Patch
tmp	Patch
bff-api-app	Patch
bff-client-app	Patch
bff-indep-client-app	Patch
bff-hono	Patch
integration-clean-dist-path	Patch
integration-compatibility	Patch
integration-custom-dist-path	Patch
custom-file-system-entry	Patch
integration-custom-template	Patch
deploy	Patch
deploy-server	Patch
dev-server	Patch
integration-disable-html	Patch
app-custom-entries	Patch
app-custom-routes-runtime	Patch
app-custom	Patch
app-entry	Patch
app-route	Patch
app-entry-server	Patch
i18n-app-csr-html-lang	Patch
i18n-app	Patch
i18n-app-ssr-html-lang	Patch
i18n-app-ssr	Patch
i18n-custom-i18n-wrapper	Patch
i18n-mf-app-provider	Patch
i18n-mf-component-provider	Patch
i18n-mf-consumer	Patch
i18n-routes	Patch
i18n-routes-ssr	Patch
@integration-test/image-component	Patch
main-entry-name	Patch
nonce	Patch
pure-esm-project	Patch
react-compiler-test	Patch
routes-match	Patch
routes	Patch
app-rsbuild-hooks	Patch
rsc-csr-app	Patch
rsc-csr-routes	Patch
rsc-ssr-app	Patch
rsc-ssr-routes	Patch
basic-app-rstest-browser	Patch
basic-app-rstest	Patch
runtime-custom-plugin	Patch
runtime-custom-config-plugin	Patch
select-mul-entry-test	Patch
select-one-entry-test	Patch
server-config	Patch
server-esm-tsx	Patch
server-json-script	Patch
server-monitors	Patch
server-prod	Patch
server-routes	Patch
@source-code-build/app	Patch
ssg-fixtures-mega-list-routes	Patch
ssg-fixtures-nested-routes	Patch
ssg-fixtures-simple	Patch
ssg-fixtures-web-server	Patch
ssr-base-async-entry-test	Patch
ssr-base-async-pre-entry-test	Patch
ssr-base-json-test	Patch
ssr-base-test	Patch
ssr-base-fallback-test	Patch
init	Patch
ssr-base-loadable	Patch
ssr-partial-test	Patch
rsc-closing-tags-test	Patch
ssr-script-loading	Patch
ssr-useid-test	Patch
ssr-streaming-inline-test	Patch
ssr-streaming-lazy-test	Patch
ssr-streaming-test	Patch
styled-components-stream	Patch
styled-components-string	Patch
integration-tailwindcss-v2	Patch
integration-tailwindcss-v3	Patch
integration-tailwindcss-v4-tools	Patch
integration-tailwindcss-v4	Patch
tmp-dir	Patch
tools-plugin-options-test	Patch
write-to-dist	Patch
@modern-js/bundle-diff-benchmark	Minor
@modern-js/main-doc	Minor
@modern-js/tsconfig	Minor
@modern-js/adapter-rstest	Minor
@modern-js/builder	Minor
@modern-js/plugin-data-loader	Minor
@modern-js/plugin-ssg	Minor
@modern-js/image	Minor
@modern-js/render	Minor
@modern-js/bff-core	Minor
@modern-js/bff-runtime	Minor
@modern-js/server-core	Minor
@modern-js/create-request	Minor
@modern-js/plugin-polyfill	Minor
@modern-js/prod-server	Minor
@modern-js/server-runtime	Minor
@modern-js/server	Minor
@modern-js/server-utils	Minor
@modern-js/app-tools	Minor
@modern-js/i18n-utils	Minor
@modern-js/plugin	Minor
@modern-js/runtime-utils	Minor
@modern-js/types	Minor
@modern-js/utils	Minor
@modern-js/rslib	Minor
@scripts/prebundle	Patch
@scripts/rstest-config	Patch
entries-app-builder	Patch
@scripts/release-node	Patch

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[github-actions]

Rsdoctor Bundle Diff Analysis

📊 Quick Summary

Project	Total Size	Change
bundle-diff	502.1 KB	+148.0 B (0.0%)

📋 Detailed Reports (Click to expand)

📁 bundle-diff

Path: benchmark/bundle-diff/dist/rsdoctor-data.json

📌 Baseline Commit: 52b4a4e785 | PR: #9036

Metric	Current	Baseline	Change
📊 Total Size	502.1 KB	502.0 KB	+148.0 B (0.0%)
📄 JavaScript	494.7 KB	494.6 KB	+148.0 B (0.0%)
🎨 CSS	1.2 KB	1.2 KB	0
🌐 HTML	5.5 KB	5.5 KB	0
📁 Other Assets	760.0 B	760.0 B	0

📦 Download Diff Report: bundle-diff Bundle Diff

Generated by Rsdoctor GitHub Action