Adds `docs/overview.md` covering the core concepts: architecture,
lifecycle, UI resources, bidirectional communication, theming, display
modes, and security. Includes mermaid flowchart and sequence diagrams.
Also adds the `@boneskull/typedoc-plugin-mermaid` TypeDoc plugin for
mermaid diagram support. However, the plugin handles HTML entities from
TypeDoc incorrectly, so `scripts/typedoc-plugin-fix-mermaid-entities.mjs`
decodes HTML entities before the plugin processes them.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Migrate JSDoc and markdown documentation from `{@includeCode ./file#region}`
tags to inline code fences with `source="./file#region"` attributes.
Code examples are now visible directly in source files while remaining
type-checked via their `.examples.ts` source files.
Add `scripts/sync-snippets.ts` to extract code from `//#region` blocks
and sync it into labeled fences. Run with `npm run sync:snippets`.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Configure TypeDoc to use the GitHub-styled theme for better visual
consistency with the project's GitHub presence. Also reorganize the
config options and enable group navigation for improved documentation
structure.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Replace requirements.txt with inline script dependencies in server.py
- Add package.json with npm scripts for run-all.ts integration
- Update CI workflow to install uv via astral-sh/setup-uv@v5
- Update Docker commands to install uv for e2e tests
- Add Playwright golden screenshot for qr-server
- Update README with uv installation and usage instructions
* feat(pdf-server): Interactive PDF viewer example
PDF viewer with PDF.js featuring:
- Chunked binary loading with progress bar
- Text extraction for AI context
- arXiv paper support (fetch by ID)
- Page navigation with keyboard shortcuts
- Zoom controls (including Ctrl+0 reset)
- Fullscreen mode support
- Horizontal swipe for page changes (disabled when zoomed)
- Page persistence in localStorage
- Text selection via PDF.js TextLayer
- Clickable title link to source URL
- Rounded corners and subtle border styling
* chore: Add pdf-server to screenshot generation list
* refactor(pdf-server): Simplify and generalize PDF loading
- Accept any HTTP(s) URLs instead of ArXiv-only
- Use HTTP Range requests for chunked binary loading
- Remove ArXiv-specific code (arxiv.ts, metadata fetching)
- Remove CLAUDE.md index generation
- Flatten hierarchical folder structure to simple entries list
- Remove dead code: getPdfSummary, httpFileSizes
- Simplify base64 encoding using Buffer
- Simplify chunk extraction using slice()
- Consolidate DEFAULT_PDF_URL constant
The server now works with any PDF URL, not just arXiv papers.
HTTP Range requests stream chunks on-demand when supported.
* feat(pdf-server): Include title and selection in model context
- Add pdfTitle to updateModelContext structuredContent
- Include selection position (text, start, end) when text is selected
- Add debounced selectionchange listener to update context on selection
* fix(pdf-server): Restore default URL in view_pdf schema
The UI needs the default value in the schema to show it properly.
* refactor(pdf-server): Further simplifications
- Remove hard-coded test paths from main()
- Remove unused resources: pdfs://metadata/{pdfId}, pdfs://content/{pdfId}
- Remove unused metadata fields: subject, creator, producer, creationDate, modDate
- Remove unused entry fields: relativePath, estimatedTextSize
- Remove filterEntriesByFolder and folder filter from list_pdfs
- Remove redundant output schema validation (trust typed returns)
- Simplify scanDirectory and createLocalEntry signatures
Total: 1836 → 1666 lines (-170 lines, -9%)
* refactor(pdf-server): Major simplification for didactic focus
Simplified the example to focus on key MCP Apps SDK patterns:
- Chunked data through size-limited tool calls
- Model context updates (page text + selection)
- Display modes (fullscreen vs inline)
- External links (openLink)
Changes:
- Remove local file support (HTTP URLs only)
- Restrict dynamic URLs to arxiv.org for security
- Simplify types: url instead of sourcePath/sourceType
- Simplify indexer: 168 → 44 lines
- Simplify loader: 318 → 171 lines
- Simplify server: 337 → 233 lines
- Fix selection text normalization
- Rewrite README with didactic focus
Total: 1836 → 1236 lines (-33%)
* feat(pdf-server): Add file:// URL support for local files
- Local paths are converted to file:// URLs on startup
- file:// URLs must be in the initial list (strict validation)
- Dynamic URLs still restricted to arxiv.org only
- Updated README with local file examples
* fix(pdf-server): Improve selection detection with logging
- Add logging to selectionchange handler to verify it fires
- Add fallback matching without spaces (TextLayer spans may lack spaces)
- Log selection detection success/failure for debugging
The issue: PDF.js TextLayer renders text as positioned spans without
space characters between them. When selecting across spans:
- pageText has spaces (items joined with ' ')
- sel.toString() may not have spaces
- indexOf fails to match
The fix tries exact match first, then falls back to spaceless matching.
* feat(pdf-server): Format model context as markdown with front matter
Model context now looks like:
```markdown
---
url: https://arxiv.org/pdf/...
page: 5/144
---
Page text with <pdf-selection>selected text</pdf-selection> inline.
```
This is cleaner for the model to parse and includes the source URL.
* refactor(pdf-server): Extract smart truncation helpers
Added two well-designed helpers:
formatPageContent(text, maxLength, selection?)
- Centers truncation window around selection if present
- Adds <truncated-content/> markers at elision points
- Wraps selection in <pdf-selection> tags
- Allocates 60% context before, 40% after for readability
findSelectionInText(pageText, selectedText)
- Tries exact match first
- Falls back to spaceless match for TextLayer quirks
- Returns { start, end } or undefined
Example output with selection:
```
<truncated-content/>
...context before... <pdf-selection>selected text</pdf-selection> ...context after...
<truncated-content/>
```
* fix(pdf-server): Truncate inside selection tags when selection too long
When selection is too large for the budget:
<truncated-content/><pdf-selection><truncated-content/>start...end<truncated-content/></pdf-selection><truncated-content/>
This keeps the selection structure intact while showing beginning and end.
* refactor(pdf-server): Remove unused read_pdf_text, use Attention paper as default
- Remove read_pdf_text tool (viewer extracts text client-side with pdfjs)
- Remove PdfTextChunk and ReadPdfTextInput types
- Remove loadPdfTextChunk from pdf-loader
- Change default PDF to 'Attention Is All You Need' (1706.03762)
- Update README with modest language
* refactor(pdf-server): Simplify to use URL as ID, rename view_pdf to display_pdf
Major simplifications:
- Use URL directly as identifier (no hashing)
- Remove displayName - show elided URL with full URL as tooltip
- Rename view_pdf to display_pdf with better description
- Update all references from pdfId to url
- Simplify storage key and model context
The tool description now explains it displays an interactive viewer in the chat.
* feat(pdf-server): Normalize arxiv URLs to PDF format
arxiv.org/abs/... -> arxiv.org/pdf/...
Applied both at startup and when loading dynamic URLs.
* docs(pdf-server): Add prompt engineering to display_pdf description
* fix(pdf-server): Sharp rendering on retina displays
Account for devicePixelRatio when rendering canvas:
- Scale canvas dimensions by dpr
- Scale context by dpr
- Keep CSS size at logical pixels
* fix(pdf-server): Normalize arxiv URLs in read_pdf_bytes too
* add to e2e spec
* add to e2e spec
* add to e2e spec
* add to e2e spec
* regen
* chore: regenerate package-lock.json and fix hono vulnerability
* docs: add pdf-server screenshot to READMEs
* regen
* ci: add missing examples to pkg-pr-new publish
* ci: add pdf-server to npm publish examples
* Update README.md
* pdf-server: improve tool response text for better model context
* revert unrelated screenshot changes
* pdf-server: dynamically add arxiv URLs in read_pdf_bytes
Fixes 'PDF not found' error when server restarts between display_pdf
(which adds the entry) and read_pdf_bytes (which previously only looked
up existing entries). Now read_pdf_bytes mirrors display_pdf's logic
and dynamically adds arxiv URLs to the index.
* feat: add script to generate 300x300 grid-cell.png screenshots for examples
- Add generate-grid-screenshots.spec.ts Playwright test to capture screenshots
- Add npm run generate:screenshots command (Docker-based for Santa compatibility)
- Add sharp dependency for image resizing with centered-fill mode
- Generate grid-cell.png for 14 example servers (only React for basic-server-* series)
The screenshots are 300x300 PNG images cropped with centered fill mode,
suitable for use in a grid layout showcasing the examples.
* docs: add example gallery grid to README
Add a 3-column visual grid showcasing 14 example MCP Apps with:
- Thumbnail screenshots (300x300 grid-cell.png)
- Clickable links to example directories
- Hover tooltips with brief descriptions
Organized by visual impact: 3D/WebGL examples first, then
visualizations, charts, monitoring, and starter templates.
* fix: use aspect-fit instead of crop for screenshots
Change from fit: 'cover' (crops) to fit: 'contain' (letterbox)
so the full app content is visible without cropping.
* feat: improve screenshot generation
- Constrain viewport to 500px width for consistent rendering
- Wait 5 seconds for full app load (tiles, animations, data)
- Screenshot just the inner iframe (no extra whitespace)
- Save both screenshot.png (full-size) and grid-cell.png (300x300 thumbnail)
- Use contain mode to preserve aspect ratio
* fix: use cover mode with top alignment for grid thumbnails
No letterboxing - crops to fill 300x300, aligned to top so headers
and important content are always visible.
* feat: improve screenshot gallery
- Remove integration-server from gallery (it's for E2E testing only)
- Add 30s extra wait for Map and Video servers to load fully
- Improve Three.js default scene: isometric rotation + better lighting
- Update README: Starter Templates row with links to all framework variants
(React, Vue, Svelte, Preact, Solid, Vanilla JS)
- Regenerate all screenshots with updated settings
* fix: improve README gallery layout
- Fix uneven column widths by using minimal separator
- Move Starter Templates to separate 2-cell table with description
- Add screenshot.png to top of each example README (13 examples)
- Shorten tooltips for cleaner table
* revert to document.write again; cesiumjs doesn't like srcdoc, period.
* fix: map-server screenshot now renders properly
- Merged ochafik/post-fixes which reverts sandbox from srcdoc to document.write
(CesiumJS doesn't work with srcdoc iframes)
- Fixed map-server name in screenshot test ('Map Server' not 'CesiumJS Map Server')
- Simplified screenshot generation script (removed complex debugging code)
- Increased map-server wait time to 45s for reliable tile loading
- Regenerated all 13 screenshots
* fix: remove redundant screenshots from READMEs
Remove the simple \ line from READMEs that
already had nicer HTML table screenshots. Keep it only for examples
that didn't have existing screenshots.
* docs: move gallery to Examples section
- Move screenshot gallery from top of README to Examples section
- Remove redundant list of basic examples (now shown visually in gallery)
- Clean up duplicate run instructions
* fix: remove empty header row from starter templates table
* fix: remove empty header rows from both tables
* fix: add prettier-ignore to prevent table header expansion
* feat: use custom screenshot for video-resource-server
- Use better screenshot from PR #253 comment showing actual video playback
- Skip video-resource-server in screenshot generation script
- Add SKIP_SERVERS set for manually maintained screenshots
* fix: revert unrelated map-server name change
* fix: use correct server name 'CesiumJS Map Server' in screenshot test
* chore: release 0.4.0
* chore: add new examples to npm publish workflow
Add map-server, shadertoy-server, and transcript-server to the
publish-examples matrix.
* fix: ensure lib is built before examples:build
Add preexamples:build hook to automatically run `npm run build` before
`examples:build`. This ensures examples always type-check against the
latest library code, catching breaking changes during development.
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Co-Authored-By: Claude <noreply@anthropic.com>
* feat: add version consistency check for examples
Add scripts/check-versions.mjs to verify that example package.json files
reference the correct version of @modelcontextprotocol/ext-apps.
- Allows "../.." (local dev) or "^{root-version}" as valid dependencies
- Runs in CI before npm install to catch mismatches early
- Available locally via `npm run check:versions`
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Co-Authored-By: Claude <noreply@anthropic.com>
* chore: regenerate package-lock.json for cross-platform compatibility
---------
Co-authored-by: Claude <noreply@anthropic.com>
* chore: bump version to 0.3.0
Breaking changes:
- `viewport` replaced with `containerDimensions` in host context
New examples:
- video-resource-server
- sheet-music-server
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Co-Authored-By: Claude <noreply@anthropic.com>
* fix(video-resource-server): add missing server-utils and fix import path
The video-resource-server was importing from a non-existent
../shared/server-utils.js path. Added the server-utils.ts file
and fixed the import to use ./src/server-utils.js like other examples.
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Co-Authored-By: Claude <noreply@anthropic.com>
* chore: update ext-apps version refs to 0.3.0
---------
Co-authored-by: Claude <noreply@anthropic.com>
* feat: publish example servers to npm
Make example MCP App servers publishable to npm under the
@modelcontextprotocol scope:
- server-basic-react
- server-basic-vanillajs
- server-budget-allocator
- server-cohort-heatmap
- server-customer-segmentation
- server-scenario-modeler
- server-system-monitor
- server-threejs
- server-wiki-explorer
Changes:
- Remove `private: true` from example package.json files
- Add proper npm metadata (description, repository, license, files)
- Update ext-apps dependency from relative to ^0.2.2
- Copy server-utils.ts into each package for standalone use
- Add publish-examples job to npm-publish.yml workflow
The examples will be published automatically when a GitHub release
is created, after the main SDK package is published.
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Co-Authored-By: Claude <noreply@anthropic.com>
* feat: publish examples with pkg-pr-new for PR testing
* feat: export createServer from example servers
* style: format integration-server/server.ts
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Co-Authored-By: Claude <noreply@anthropic.com>
* fix: update e2e snapshots for basic-server examples
Update golden screenshots for basic-react and basic-vanillajs after
the tool output was simplified from JSON to plain text in #182.
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* merge
* refactor: update sheet-music-server and video-resource-server to new publishing pattern
- Move server-utils.ts from src/ to root level
- Add npm publishing metadata (scoped name, repository, license, files)
- Change ext-apps dependency from local to versioned ^0.2.2
- Update server.ts to handle stdio mode inline
* update package-lock
* fix: update package-lock.json for renamed server packages
* feat: add NASA public domain video to video-resource-server
Added 'nasa-earth' option - NASA ISS Earth observations (6.4MB).
Source: archive.org/details/NASA-Ultra-High-Definition (public domain)
* fix: add default videoId for video-resource-server
* fix: use existing bunny-1mb as default video, remove nasa-earth
* refactor: update new framework examples to publishing pattern
Add publishing metadata for:
- @modelcontextprotocol/server-basic-preact
- @modelcontextprotocol/server-basic-solid
- @modelcontextprotocol/server-basic-svelte
- @modelcontextprotocol/server-basic-vue
Changes:
- Move server-utils.ts from src/ to root
- Add npm publishing metadata
- Update ext-apps dep to versioned ^0.2.2
- Add stdio mode support in main()
* fix: add missing @rollup/rollup-win32-arm64-msvc to optionalDependencies
This fixes the Windows ARM64 CI build failure caused by npm's optional
dependency bug. The package.json was missing this platform-specific
rollup binding.
---------
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Olivier Chafik <ochafik@anthropic.com>
Allows running `npm start` as a shorthand for `npm run examples:start`,
providing a conventional entry point to launch the example servers.
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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
* feat: make generated Zod schemas version-agnostic (v3.25+/v4)
- Change generated schema imports from `zod/v4` to standard `zod`
- Replace v4-only `z.looseObject()` with `z.object().passthrough()`
- Works with both Zod v3.25+ and v4, matching MCP TS SDK approach
- Bump version to 0.2.2
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Co-Authored-By: Claude <noreply@anthropic.com>
* chore: regenerate package-lock.json in Docker
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Co-Authored-By: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
* fix: widen @oven/bun-* version range to improve install compatibility
Lower the minimum version of @oven/bun-* optional dependencies from
^1.3.4 to ^1.2.21. This is the lowest common version available across
all platform-specific packages, improving compatibility for contributors
who may not have access to the latest package versions.
The caret range (^) still allows npm to install newer versions when
available.
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Co-Authored-By: Claude <noreply@anthropic.com>
* chore: bump version to 0.2.1
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---------
Co-authored-by: Claude <noreply@anthropic.com>
* feat: make MCP SDK a peer dependency
- Move @modelcontextprotocol/sdk from dependencies to peerDependencies (^1.20.0)
- Add to devDependencies for local development (^1.24.3)
- Externalize SDK from all build entry points (app, app-bridge, react, server)
Benefits:
- Consumers control their SDK version
- Deduplication when consumer already has SDK
- Follows pattern of react/zod peer deps
* fix: require SDK ^1.24.0 for Zod 4 compatibility
Earlier SDK versions have Zod type incompatibilities that cause build errors.
* chore: update examples to SDK ^1.24.0 to match peer dep
* feat: add server helpers and optional connect() transport
Add `src/server/` with convenience functions for registering MCP App tools
and resources:
- `registerAppTool(server, name, config, handler)`
- `registerAppResource(server, name, uri, config, callback)`
The `transport` parameter in `App.connect()` is now optional, defaulting to
`PostMessageTransport(window.parent)`.
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* Update src/server/index.ts
Co-authored-by: Jonathan Hefner <jonathan@hefner.pro>
* fix: refine server helper types
- Make RESOURCE_URI_META_KEY required in McpUiAppToolConfig (tools need a UI resource)
- Make _meta optional in McpUiAppResourceConfig (not all resources need custom metadata)
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* refactor: simplify RESOURCE_URI_META_KEY re-export
* refactor: consolidate export statements
---------
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Jonathan Hefner <jonathan@hefner.pro>
Move react and react-dom from dependencies to peerDependencies with
support for React 17, 18, and 19. This allows consumers to use their
preferred React version instead of forcing v19.
- Added peerDependencies for react/react-dom (^17 || ^18 || ^19)
- Marked react dependencies as optional in peerDependenciesMeta
- Moved react/react-dom to devDependencies for local development
- React is already externalized in the build (build.bun.ts)
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Co-authored-by: Claude <noreply@anthropic.com>
* fix: Windows compatibility for npm scripts and cross-platform CI
Fixes#142 - Windows PowerShell install bug
Changes:
- Replace single quotes with escaped double quotes in generate:schemas
(cmd.exe passes single quotes literally, breaking prettier glob matching)
- Simplify prettier scripts: remove redundant --ignore-path flags
(prettier auto-loads .gitignore and .prettierignore by default)
- Remove $(pwd) from prettier scripts (bash-only syntax)
- Add cross-platform CI matrix: Linux x64, Windows x64, macOS ARM64, macOS x64
- Use shell: bash for grep commands in CI (not available in Windows cmd.exe)
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Co-Authored-By: Claude <noreply@anthropic.com>
* fix: remove bun npm package from all workspaces
The bun npm package tries to install platform-specific binaries which
fails on Windows CI. Since bun is installed via oven-sh/setup-bun action
in CI (and developers install it globally), we don't need the npm package.
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Co-Authored-By: Claude <noreply@anthropic.com>
* fix: skip examples:build on Windows (uses Unix-only INPUT=... syntax)
The examples use `INPUT=mcp-app.html vite build` which is bash syntax
for setting environment variables. This doesn't work on Windows cmd.exe.
Since examples aren't published to npm, we can skip building them on Windows.
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* fix: force LF line endings for cross-platform prettier consistency
Git on Windows auto-converts line endings to CRLF, causing prettier to
report formatting issues. Force LF for all text files.
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* ci: add test for git-based npm install (cross-platform)
This verifies that `npm install git+https://...` works on all platforms,
which triggers the prepare script and requires bun to be available.
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Co-Authored-By: Claude <noreply@anthropic.com>
* ci: add Linux ARM64 and Windows ARM64 to CI matrix
- Added ubuntu-24.04-arm (Linux ARM64)
- Added windows-11-arm (Windows ARM64)
Note: WSL is not available on GitHub-hosted runners (requires nested
virtualization which isn't supported).
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Co-Authored-By: Claude <noreply@anthropic.com>
* ci: disable Windows ARM64 (Bun lacks stable ARM64 binaries)
The oven-sh/setup-bun action fails with 404 when trying to download
Bun for Windows ARM64. Re-enable when Bun adds proper support.
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Co-Authored-By: Claude <noreply@anthropic.com>
* ci: add Windows WSL build test
Uses Vampire/setup-wsl action to install Ubuntu-24.04 in WSL and run
the full build/test cycle. This tests the Linux-in-Windows scenario
that was reported in issue #142.
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Co-Authored-By: Claude <noreply@anthropic.com>
* ci: fix WSL build - install unzip for Bun installer
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Co-Authored-By: Claude <noreply@anthropic.com>
* ci: add setup-bun to publish.yml workflow
The pkg-pr-new publish workflow was missing bun setup, causing
"bun: not found" errors during npm ci (which triggers prepare script).
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Co-Authored-By: Claude <noreply@anthropic.com>
* ci: enable Windows ARM64 with x64-baseline Bun (via emulation)
Windows ARM64 can run x64 binaries via emulation. Use bun-download-url
to force x64-baseline build since native ARM64 Bun isn't available yet.
Reference: https://github.com/oven-sh/bun/issues/9824🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* ci: remove macOS x64 (macos-13 runner retired)
The macos-13 based runner images are now retired.
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* docs: add Bun installation instructions per platform
Documents that Bun is required for development, with platform-specific
install commands in collapsible sections.
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Co-Authored-By: Claude <noreply@anthropic.com>
* docs: note Bun requirement in README examples section
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* feat: add bun as optional dependency (no global install required)
- Add @oven/bun-* platform packages as optionalDependencies
- Create postinstall script to set up bun binary from optional deps
- Handle Windows ARM64 by downloading x64-baseline for emulation
- Remove setup-bun from CI workflows (npm install handles it now)
- Remove manual Bun install instructions from docs
This alternative approach eliminates the need for global Bun installation
or setup-bun action in CI. npm install automatically installs the
platform-appropriate bun binary.
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Co-Authored-By: Claude <noreply@anthropic.com>
* chore: add debug logging to setup-bun script
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Co-Authored-By: Claude <noreply@anthropic.com>
* chore: force stdout flush in setup-bun for CI debugging
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Co-Authored-By: Claude <noreply@anthropic.com>
* chore: add more debugging to setup-bun
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Co-Authored-By: Claude <noreply@anthropic.com>
* chore: remove accidental test artifacts
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Co-Authored-By: Claude <noreply@anthropic.com>
* chore: run setup-bun in prepare script (before build)
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Co-Authored-By: Claude <noreply@anthropic.com>
* feat: use cross-env for Windows-compatible example builds
- Add cross-env to devDependencies
- Update all example package.json scripts to use cross-env for INPUT and NODE_ENV
- Enable examples:build on Windows in CI (no longer Unix-only)
- Add examples:build to WSL CI job
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* chore: remove unused imports in setup-bun.mjs
Address github-code-quality bot comments.
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Co-Authored-By: Claude <noreply@anthropic.com>
* fix: use run-bun.mjs wrapper for prepare hook compatibility
During npm install's prepare hook, node_modules/.bin is not in PATH,
so calling 'bun' directly fails. The new run-bun.mjs wrapper finds
bun at node_modules/.bin/bun and runs it with the correct path.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* ci: restore setup-bun action for build jobs
- Add setup-bun action to build and test-git-install jobs
- Disable Windows ARM64 (Bun doesn't support this platform)
- Add bun installation to WSL build
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* fix: remove bun devDep, add libc detection for Linux ARM64
- Remove 'bun' from devDependencies (its postinstall fails on Windows ARM64)
- Add libc detection (glibc vs musl) to setup-bun.mjs
- Only try compatible binaries based on detected libc
- Re-enable Windows ARM64 in CI (now uses x64 emulation fallback)
- Remove setup-bun action from CI (no longer needed)
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Co-Authored-By: Claude <noreply@anthropic.com>
* ci: simplify WSL build - let setup-bun.mjs handle bun installation
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Co-Authored-By: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
- Remove platform-specific browser channel (was using Chrome on macOS,
Chromium in CI) - now uses default Chromium everywhere
- Add Docker-based test scripts for CI-identical local testing:
- `npm run test:e2e:docker` - run tests in Docker
- `npm run test:e2e:docker:update` - regenerate golden screenshots
- Regenerate golden screenshots using Docker/Linux environment
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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
* Add setter-based handlers for MCP request/notification forwarding
- Add oncalltool, onlistresources, onlistresourcetemplates, onreadresource, onlistprompts setters for Guest UI → Host requests
- Add sendToolListChanged, sendResourceListChanged, sendPromptListChanged methods for Host → Guest UI notifications
- Refactor connect() to use new setters with inlined callbacks
- Update documentation to clarify optional client parameter behavior
- Remove unused forwardRequest/forwardNotification helper methods
- Add comprehensive tests for AppBridge without MCP client (manual handlers)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Potential fix for pull request finding 'Unused variable, import, function or class'
Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>
* fix: move prettier to dependencies for git-based installs
* fix: add explicit prettierrc to prevent inheriting parent configs during git-based installs
* Apply suggestions from code review
Co-authored-by: Jonathan Hefner <jonathan@hefner.pro>
* refactor(tests): factor out test values and add missing assertions
Address PR review feedback:
- Factor out test value objects (toolCall, resultContent, etc.) for clearer tests
- Add missing assertions on receivedRequests[0] for list handlers
- Improve test readability by defining expected values at the top of each test
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* docs: improve TypeDoc formatting and use `as const` for notification methods
- Use proper TypeDoc syntax with `@param callback.params` and `@param callback.extra`
- Add {@link ResultType} references for return types
- Replace `as Notification` with `as const` on method literals where possible
(sendResourceListChanged, sendPromptListChanged)
- Simplify sendHostContextChange cast syntax
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* refactor(types): use explicit type unions for AppBridge protocol types
- Add AppBridgeRequest, AppBridgeNotification, AppBridgeResult type unions
that explicitly list all valid types for the protocol
- Replace generic SDK Request/Notification/Result with our specific types
- Remove all type casts by using `as const` on method literals
- Add index signature to McpUiHostContext for forward compatibility
This improves type safety and documents exactly what the AppBridge supports.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* refactor: move AppRequest/AppNotification/AppResult to types.ts
Move protocol type unions from app-bridge.ts to types.ts where they
belong with other type definitions.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* chore: regenerate schemas with clean npm install
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>
Co-authored-by: Jonathan Hefner <jonathan@hefner.pro>
* Add Playwright E2E tests with screenshot golden testing
- Add E2E tests for all 8 MCP server examples
- Screenshot golden images for visual regression testing
- CI workflow for running E2E tests
- npm scripts: test:e2e, test:e2e:update, test:e2e:ui
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Add default demo code for Three.js example
When no code is provided, show a rotating green cube demo.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Add E2E testing documentation to CONTRIBUTING.md
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Update Three.js golden screenshot with 3D cube
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Add explicit permissions to CI workflow
Set minimal read-only permissions for security best practices.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Fix test.setTimeout() to be inside describe blocks
Playwright requires setTimeout to be called within a test or describe block.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Simplify E2E tests - remove excessive timeouts
- Remove explicit setTimeout calls (default 30s is sufficient)
- Replace waitForTimeout(5000/6000) with proper waitForAppLoad()
- Wait for inner iframe visibility instead of fixed delays
- Keep only 500ms stabilization for screenshot animations
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Co-Authored-By: Claude <noreply@anthropic.com>
* Auto-generate missing snapshots in CI
Use updateSnapshots: 'missing' in CI to handle cross-platform
screenshot differences (macOS vs Linux).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Use platform-agnostic golden screenshots
- Remove -chromium-darwin suffix from snapshot filenames
- Configure snapshotPathTemplate for cross-platform compatibility
- Increase tolerance to 5% for rendering differences between platforms
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Refactor tests to use forEach instead of for-of loop
May help with Playwright test discovery issues in CI.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Use npm ci and list reporter in CI
- Use npm ci for exact package versions
- Use --reporter=list instead of html to avoid potential re-evaluation issues
- Only upload test-results on failure
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Exclude e2e tests from bun test
Run bun test only on src/ directory to avoid running Playwright tests
with Bun's test runner.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Fix prettier formatting
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Add interaction tests for basic server apps
Test that clicking buttons in the MCP App triggers the corresponding
host callbacks:
- Send Message → host logs "Message from MCP App"
- Send Log → host logs "Log message from MCP App"
- Open Link → host logs "Open link request"
Tests both React and Vanilla JS implementations.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Mask dynamic content in E2E screenshot tests
Add Playwright mask option to handle servers with dynamic/random content:
- basic-react/vanillajs: mask server time display
- system-monitor: mask CPU chart, memory stats, uptime
- cohort-heatmap: mask heatmap grid (random data)
- customer-segmentation: mask scatter chart (random data)
This addresses PR feedback about handling examples with non-deterministic
output. Masking replaces the previous 10% tolerance with proper exclusion
of dynamic elements, allowing tighter 1% tolerance for the rest of the UI.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Add wiki-explorer to E2E tests with default URL param
- Add default URL "https://en.wikipedia.org/wiki/Model_Context_Protocol" to
wiki-explorer-server's get-first-degree-links tool inputSchema
- Update basic-host to automatically populate input field with tool defaults
extracted from inputSchema.properties
- Add wiki-explorer-server to E2E test suite with dynamic masking for the
force-directed graph
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Use .default() for threejs tool schema instead of .optional()
This exposes the default code and height values in the JSON Schema,
allowing basic-host to auto-populate the input field with defaults.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Enable parallel E2E tests with timeouts and canvas masking
- Enable fullyParallel with 4 workers locally (2 in CI)
- Add 30s timeout per test
- Mask threejs canvas for stable screenshots
- Update snapshots to reflect default values in input fields
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Add pre-commit check for private registry URLs in package-lock.json
Same check as in CI to catch issues before push.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Increase screenshot diff tolerance to 6% for cross-platform rendering
Font rendering differs between macOS and Linux, causing ~5% pixel differences.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Revert pre-commit artifactory check (moved to separate PR #133)
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Co-Authored-By: Claude <noreply@anthropic.com>
* Format threejs server.ts
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Update CONTRIBUTING.md to reflect platform-agnostic screenshots
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* fix(e2e): use factory pattern for MCP servers to support parallel connections
McpServer only supports one transport at a time. When multiple browser
contexts connected in parallel, calling server.connect(transport) for
each session overwrote the previous transport's callbacks, causing
connection corruption and test timeouts.
Changes:
- server-utils.ts: accept factory function instead of single instance
- All 9 example servers: wrap server creation in createServer() function
- playwright.config.ts: re-enable parallel execution (4 workers)
- servers.spec.ts: add toBeEnabled wait for server connection
- Update screenshot baselines for basic-vanillajs and cohort-heatmap
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
* fix: prettify generated files on the fly
- Add prettier --write to generate:schemas script to format generated
files immediately after generation
- Remove redundant prettier:fix from CI schema verification step
(now that generation includes formatting)
This fixes the release CI failure where generated files weren't
formatted. Previously, PR CI masked this by running prettier:fix
before the final prettier check, while release CI ran the check
directly on freshly-generated (unformatted) files.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* format
---------
Co-authored-by: Claude <noreply@anthropic.com>
* feat: add ts-to-zod schema generation from spec.types.ts
Add automated Zod schema generation using ts-to-zod:
- New npm script `generate:schemas` to regenerate schemas from spec.types.ts
- Post-processing script for Zod v4 compatibility and MCP SDK type imports
- src/spec.types.ts: Pure TypeScript interface definitions (source of truth)
- src/schemas.generated.ts: Auto-generated Zod schemas
- src/schemas.ts: Re-exports with PascalCase naming for backwards compatibility
The generated schemas provide a simpler alternative to the hand-written schemas
in types.ts, useful for lighter validation or reference implementations.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* refactor: types.ts now re-exports from spec.types.ts and schemas.generated.ts
- types.ts imports and re-exports types from spec.types.ts (source of truth)
- types.ts imports and re-exports schemas from schemas.generated.ts
- Added compile-time VerifySchemaMatches checks to flag mismatches between
interfaces and generated schemas
- Removed redundant schemas.ts (types.ts now handles all re-exports)
- Applied prettier formatting to schemas.generated.ts
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* refactor: use ts-to-zod as library with integration tests
Replace CLI-based schema generation with library API:
- scripts/generate-schemas.ts: New script using ts-to-zod library API
- Detailed documentation of why each post-processing step is needed
- Generates integration tests via getIntegrationTestFile()
- Better error reporting and control
- src/schemas.generated.test.ts: Auto-generated integration tests
- Compile-time verification that schemas match TypeScript types
- Uses expectType<> pattern for bidirectional type checking
- Removed scripts/postprocess-schemas.ts (merged into generate-schemas.ts)
- Fixed McpUiResourceTeardownResult to include index signature for MCP SDK
Protocol compatibility (detected by the new integration tests)
Post-processing rationale (documented in generate-schemas.ts):
1. zod → zod/v4: Explicit v4 subpath for version clarity
2. z.any() → MCP SDK schemas: External types need real validation
3. z.record().and() → z.looseObject(): Index signatures need Zod v4 idiom
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* feat: regenerate schemas during build + CI check
- build script now runs generate:schemas before bun build
- CI workflow verifies generated schemas are up-to-date
(fails if spec.types.ts changed but schemas weren't regenerated)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* refactor: generate PascalCase schemas, move verification to tests
- Add getSchemaName option to generate PascalCase schema names directly
(McpUiOpenLinkRequestSchema instead of mcpUiOpenLinkRequestSchema)
- Remove redundant compile-time verification from types.ts
(already handled by generated test file's bidirectional expectType checks)
- Simplify types.ts from 235 to 57 lines (just re-exports)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* fix: add missing csp field, simplify schema generation
- Add missing csp field to McpUiSandboxResourceReadyNotification (regression from merge)
- Simplify generate-schemas.ts - remove complex .describe() conversion
- Document that ts-to-zod supports @description JSDoc tags for .describe()
- Improve z.looseObject() replacement with brace-counting for nested objects
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* feat: add @description JSDoc tags for .describe() on schemas
Added @description tags to all interfaces and fields in spec.types.ts.
ts-to-zod now generates .describe() calls on all schema fields, making
descriptions available at runtime for introspection and JSON Schema generation.
Example:
/** @description URL to open in the host's browser */
url: string;
Generates:
url: z.string().describe("URL to open in the host's browser")
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* feat: generate JSON Schema from Zod schemas
Added JSON Schema generation to the schema generation pipeline:
- Uses Zod v4's built-in toJSONSchema() to convert schemas
- Generates src/schema.json with all message types in $defs
- Includes descriptions from @description JSDoc tags
- Added export "./schema.json" to package.json
- Updated CI to verify schema.json is up-to-date
Use cases:
- Language-agnostic validation (Python, Go, Rust)
- Documentation generation (Redoc, Swagger UI)
- Code generation (quicktype)
- IDE autocomplete for JSON/YAML
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* refactor: rename schema.json to schema.generated.json
Renamed to match other generated files naming convention.
Export path unchanged: ./schema.json -> ./dist/src/schema.generated.json
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* refactor: rename schemas.generated.* to schema.generated.* (singular)
Consistent singular naming for all generated files:
- schema.generated.ts
- schema.generated.test.ts
- schema.generated.json
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* refactor: rename schemas.generated.* to schema.generated.* (singular)
Consistent singular naming for all generated files:
- schema.generated.ts
- schema.generated.test.ts
- schema.generated.json
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* refactor: move generated files to src/generated/ with simpler names
Moved:
- src/schema.generated.ts → src/generated/schema.ts
- src/schema.generated.test.ts → src/generated/schema.test.ts
- src/schema.generated.json → src/generated/schema.json
Benefits:
- Cleaner organization (generated files isolated)
- Simpler names without .generated suffix
- Easier to gitignore if desired later
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* fix: add missing type exports for backwards compatibility
Added missing exports that existed in main:
- McpUiTheme, McpUiThemeSchema
- McpUiDisplayMode, McpUiDisplayModeSchema
- McpUiResourceCsp, McpUiResourceCspSchema
- McpUiResourceMeta, McpUiResourceMetaSchema
Also fixed theme/displayMode to match original values:
- theme: 'light' | 'dark' (removed 'system')
- displayMode: 'inline' | 'fullscreen' | 'pip' (removed 'carousel')
Verified: all 47 exports from main are preserved with compatible types.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* fix: stage generated files after prettier in pre-commit hook
The pre-commit hook runs build (which generates schemas) then prettier
(which formats them). The formatted generated files weren't being staged,
causing CI to fail with 'Generated schemas are out of date'.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* update generated files
* fix: run prettier after regenerating schemas in CI verification
CI was comparing unformatted generated output against formatted committed
files, causing false 'out of date' failures.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
* release: fix NPM_SECRET reference
* release: 0.0.5
* Add repository field to package.json
Required for npm provenance verification to link the package
to the GitHub repository.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* release: 0.0.6
---------
Co-authored-by: Claude <noreply@anthropic.com>
Replace hardcoded port assignments and npm scripts with run-all.ts that:
- Auto-discovers example directories and assigns ports
- Passes server URLs to basic-host via SERVERS env var
- Supports start, dev, and build commands
Update basic-host to fetch server list from /api/servers endpoint
and display server names from MCP server metadata.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Add npm publish workflow
- Add .github/workflows/npm-publish.yml triggered on GitHub releases
- Runs build and test jobs before publishing
- Uses NPM_TOKEN secret with OIDC provenance
- Smart npm tagging: latest, beta, or release-X.Y
- Add prepack hook to package.json for automatic builds
- Move bun from dependencies to devDependencies
- Add npm test step to CI workflow
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Add CONTRIBUTING.md with maintainer publishing guide
- Getting started and development process for contributors
- Pull request guidelines
- Maintainer section with:
- Repository setup (NPM_TOKEN, release environment)
- Step-by-step release publishing instructions
- npm tag documentation (latest, beta, release-X.Y)
- Maintenance release workflow
- Pre-release testing via pkg-pr-new
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* ...
* Potential fix for code scanning alert no. 9: Workflow does not contain permissions
Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
New example demonstrating interactive 3D scene rendering with:
- show_threejs_scene tool with streaming code preview
- learn_threejs documentation tool
- Full WidgetProps interface for MCP App integration
- Reusable mcp-app-wrapper.tsx pattern
Also adds bun.lockb to .gitignore.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Add server selector to basic-host example
- Add ServerSelector component to switch between MCP servers
- Run all example servers concurrently on ports 3101-3107
- Update examples:start to launch all servers with assigned ports
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Move server selector into tool call panel
- Server selector now in same component as tool selector
- Tool call results persist across server switches
- Connection caching avoids reconnects when switching servers
- Display server name with tool name in results (ServerName:ToolName)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
Replace hardcoded workspace list with find + xargs to automatically
build all examples in parallel. New examples are picked up without
manual script updates.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Demonstrates MCP App SDK usage with vanilla JavaScript (no framework),
providing parity with the existing basic-server-react example.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Introduce new example implementations to replace simple-host and
simple-server:
- basic-host: Reference host implementation with double-iframe sandbox
pattern for secure UI isolation (outer iframe validates and relays
messages, inner iframe renders untrusted tool UI via srcdoc)
- basic-server-react: MCP server example demonstrating tool registration
with linked UI resources and React UI using the useApp() hook
Build infrastructure updates:
- Add build:all script and simplify CI/pre-commit to use it
- Add examples:dev for watch-mode development workflow
Also change PostMessageTransport logging from info to debug level.
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Co-Authored-By: Claude <noreply@anthropic.com>
