* chore: add stable spec release 2026-01-26
- Use git mv to copy specification from draft to specification/2026-01-26/apps.mdx (preserves history)
- Update status from 'Draft' to 'Stable (2026-01-26)'
- Add specification version table to README
- Update Resources section with links to both stable and draft specs
* chore: bump version to 1.0.0
- Update main package version from 0.4.2 to 1.0.0
- Update all example package versions to 1.0.0
- Regenerate package-lock.json
* prettier
* chore: align protocol version with spec release 2026-01-26
- Add 'Protocol Version: 2026-01-26' to spec header
- Update LATEST_PROTOCOL_VERSION from '2025-11-21' to '2026-01-26'
- Update spec examples to use '2026-01-26' protocol version
- Add '2025-11-21' to SUPPORTED_PROTOCOL_VERSIONS for backwards compatibility
* chore: update spec references to stable 2026-01-26
- Update typedoc.config.mjs navigation link
- Update docs/overview.md spec links (10 occurrences)
- Update plugins/mcp-apps/skills/create-mcp-app/SKILL.md spec link
- Update src/spec.types.ts @see links
- Update AGENTS.md spec path
- Regenerate src/generated/schema.ts with updated links
* chore: simplify versioning - first stable release
- Remove backwards compatibility version (2025-11-21) - this is the first stable release
- Remove redundant 'Protocol Version' header - spec version IS the protocol version
* chore: add history reference comment to stable spec
* Adding a simple (bad) pdf icon for directory (#330)
* chore: bump version to 0.4.2
- Update package version from 0.4.1 to 0.4.2
- Pin @types/node to 22.10.0 for dev compatibility
- Override seroval to ^1.4.1 to fix security vulnerabilities
- Use '*' for workspace SDK dependency (works with unpublished versions)
* fix(e2e): update Map Server display name to CesiumJS Map Server (#324)
* fix(test): update map-server test to expect 'CesiumJS Map Server'
The server name was renamed but the E2E test config was not updated.
* fix: change in another file
---------
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Olivier Chafik <ochafik@anthropic.com>
* feat(server): add getUiCapability helper for capability negotiation (#313)
* feat(server): add hasUiSupport/getUiCapability for experimental+extensions
Support double-tagging for MCP Apps capability negotiation:
- Check both experimental and extensions fields in client capabilities
- Add hasUiSupport() to easily check if client supports MCP Apps
- Add getUiCapability() to retrieve the capability settings
- Update spec to document both capability locations
This enables forward compatibility as MCP transitions from experimental
to the extensions field (SEP-1724).
Claude-Generated-By: Claude Code (cli/claude-opus-4-5=100%)
Claude-Steers: 0
Claude-Permission-Prompts: 0
Claude-Escapes: 0
* fix: update @types/node version in package-lock.json
Replace invalid 22.19.5/22.19.6/22.19.7 versions with valid 22.19.3
* docs(spec): clarify hosts SHOULD double-tag, servers SHOULD check both
- Hosts SHOULD advertise capabilities in both experimental and extensions
- Servers SHOULD check both locations, preferring extensions when present
- Updated example to show double-tagging pattern
* chore: remove double-tagging recommendation, keep hasUiSupport helper
Reverts the spec changes that recommended clients double-tag capabilities
in both experimental and extensions fields. The helper functions remain
as they're useful for checking capability in either location.
* refactor(server): simplify to only getUiCapability, remove hasUiSupport
- Remove hasUiSupport function (use getUiCapability directly)
- Remove double-tagging logic (only check extensions field)
- Add ClientCapabilitiesWithExtensions type using SDK's ClientCapabilities
- Update spec to use getUiCapability
- Simplify tests
* fix: update @see link to getUiCapability
* refactor(server): inline ClientCapabilitiesWithExtensions type in getUiCapability
* refactor: move McpUiClientCapabilities to spec.types.ts
* fix: update playwright docker image to v1.58.0
* fix: use -i instead of -it for docker commands (no TTY needed)
* fix: Python server dependency resolution and Docker host validation (#333)
* fix(say-server): add --index flag to uv run for PyPI resolution
The pocket-tts dependency wasn't resolving without explicit --index flag
when invoked via npm scripts.
* fix(qr-server): allow Docker bridge IP in transport security
Add 172.17.0.1:* to allowed_hosts to fix 421 Misdirected Request errors
when the server is accessed from Docker containers.
* feat(basic-host): Add theme toggle and MCP style variables (#336)
* feat(basic-host): add theme toggle and MCP style variables
Add theme support to basic-host example:
- theme.ts: Global theme manager with light/dark toggle
- host-styles.ts: Full set of MCP CSS variables using light-dark()
- ThemeToggle component with sun/moon icons
- Theme-aware CSS using CSS custom properties
- Pass theme + styles to apps via hostContext
- Notify apps when theme changes via sendHostContextChange
Apps now receive:
- hostContext.theme: 'light' | 'dark'
- hostContext.styles.variables: All 60+ MCP CSS variables
- onhostcontextchanged notifications when theme changes
* test: update e2e goldens for theme changes
* [MCP Apps] Add appCapabilities.availableDisplayModes documentation to spec (#331)
* Add appCapabilities.availableDisplayModes documentation to spec
Document the availableDisplayModes field in McpUiAppCapabilities that allows
apps to declare which display modes they support. This enables hosts to
compute the intersection of host and app capabilities and only offer
appropriate display mode controls.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Address PR review feedback
- Change "Guest UI" to "View" terminology
- Add "View" prefix to availableDisplayModes heading for disambiguation
- Remove intersection logic - host only checks its own supported modes
- Remove assumption that apps must support inline mode
- Simplify host behavior to honor/reject based on its own capabilities
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Add appCapabilities.availableDisplayModes to types
- Add `availableDisplayModes` field to `McpUiAppCapabilities` so apps can
declare which display modes they support
- Change `HostContext.availableDisplayModes` type from `string[]` to
`McpUiDisplayMode[]` for type safety
- Regenerate schemas
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Address Olivier's feedback - consolidate display mode docs
- Remove separate "App Capabilities" section for availableDisplayModes
- Add display mode requirements to existing ui/request-display-mode section:
- Host MUST NOT switch View to mode not in appCapabilities.availableDisplayModes
- Host MAY decline requests from Views that didn't declare modes
- View MUST declare supported modes during initialization
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Restore McpUiAppCapabilities docs and fix display mode clause
- Restore McpUiAppCapabilities interface documentation with availableDisplayModes
- Restore "View MUST check if the requested mode is in availableDisplayModes
from host context" clause that was accidentally removed
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Create unified Display Modes section
Consolidate all display mode documentation into a single section:
- Display mode types (inline, fullscreen, pip)
- Declaring support from View (appCapabilities.availableDisplayModes)
- Declaring support from Host (HostContext.availableDisplayModes)
- Requesting changes (ui/request-display-mode)
- Notifying changes (ui/notifications/host-context-changed)
- All MUST/SHOULD requirements for View and Host behavior
The ui/request-display-mode in Requests section now references
the Display Modes section for behavior details.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Remove mode coercion clause from display modes
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* Regenerate schemas with correct version
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
* feat(say-server): add light/dark theme support (#338)
- Add importmap entry for main SDK exports (applyDocumentTheme, etc.)
- Import and apply host theme and styles on context changes
- Apply initial host context theme/styles when app connects
- Update CSS to use [data-theme="dark"] selector for host-provided themes
- Keep @media prefers-color-scheme as fallback for standalone mode
- Add color-scheme meta tag for native element theming
* fix: followup app -> view terminology (#339)
* chore: husky env fix, version pins, update-lock:docker script (#341)
* fix(husky): load Node.js env for GUI apps + add update-lock:docker script
Cherry-picked non-e2e changes from ochafik/fix-e2e-flaky-tests:
- Load nvm/fnm/volta/homebrew paths in pre-commit for GitHub Desktop
- Add update-lock:docker script to regenerate lockfile with public registry
* pin package versions for dev compatibility
- solid-js: 1.9.10
- caniuse-lite: 1.0.30001763
- cheerio: 1.1.2
- electron-to-chromium: 1.5.267
- @playwright/test: 1.57.0
- playwright: 1.57.0
- playwright-core: 1.57.0
* regen
* fix: pin @types/node to existing version and regenerate lockfile
- Fix @types/node 20.19.28 -> 20.19.27 (typo, version didn't exist)
- Regenerate package-lock.json to resolve versions available on both
public npm and Anthropic artifactory registries
* fix(basic-server-solid): bump solid-js 1.9.10 -> 1.9.11 to fix seroval vulnerabilities
* fix: pin seroval to 1.4.1 for dev compatibility
* Refactor server startup functions
Rename `startServer` to `startStreamableHTTPServer` and add a new
`startStdioServer` helper to make the transport type explicit. Remove
the `ServerOptions` interface in favor of reading `PORT` directly from
the environment inside the function (defaulting to `3001`).
Also update Python examples to default to port `3001` for consistency.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Support full-file inclusion in synced code snippets
Previously, the script only supported extracting regions from `.ts/.tsx`
files using the `#regionName` syntax. Now it also supports including
entire files without a region specifier, enabling sync of any file type
(JSON, YAML, shell scripts, etc.) into documentation.
Changes:
- Make `#regionName` optional in the `source=""` attribute
- Accept any fence language (not just `ts`/`tsx`)
- Simplify cache to flat map with composite keys
- Add validation error for region extraction on non-TypeScript files
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Rewrite Quickstart guide with type-checked code examples
Rewrites the Quickstart tutorial to provide a more focused, step-by-step
introduction to building MCP Apps. The guide now uses synced code fences
that pull from `examples/quickstart/`, ensuring all code shown in the
documentation is type-checked and tested.
Key improvements:
- Clearer project setup instructions with explicit commands
- Streamlined explanations of the tool + resource registration pattern
- Added screenshot showing the completed app
- E2E test coverage validates the example works end-to-end
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Add MCP Apps Overview document
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>
* Add Agent Skills installation guide
Add `docs/agent-skills.md` with installation instructions for multiple AI
coding agents including Claude Code, VS Code/Copilot, Gemini CLI, Cline,
and Goose. The guide provides three installation methods: Claude Code
plugin, Vercel Skills CLI (`npx skills add`), and manual installation.
Update `README.md` to link to the new guide and reframe the plugin
section around the broader "Agent Skills" concept.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Polish OpenAI migration reference for readability
Add framing prose to the migration guide to improve navigation:
- Expanded intro describing document purpose and how to use it
- Added note about features marked "Not yet implemented"
- Added brief transition sentences before Server-Side and Client-Side sections
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Fix mermaid diagram arrowheads not rendering
The `@boneskull/typedoc-plugin-mermaid` creates both dark and light theme
variants of each diagram, each with identical marker IDs (e.g., `#arrowhead`).
When mermaid renders SVGs at runtime, lines reference `url(#arrowhead)`, but
the browser resolves this to the first match in document order — the hidden
dark-theme SVG — causing arrows to be invisible.
The fix removes dark-theme `<div class="mermaid dark">` elements at build time,
leaving only one SVG per diagram with unique marker IDs. A CSS filter
(`filter: invert(1) hue-rotate(180deg)`) handles dark mode styling instead.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* fix(docs): improve OpenAI migration guide accuracy (#349)
- Add missing setOpenInAppUrl API to 'Not Yet in MCP Apps' section
- Clarify Event Handling table: specify exact OpenAI properties
(toolInput/toolOutput) instead of vague 'window.openai.*'
- Improve notes to distinguish sync property reads vs callbacks
* Add Testing MCP Apps guide
Document how to test MCP Apps using `basic-host` and MCP Apps-compatible
hosts like Claude.ai and VS Code Copilot. Cover debugging features for
`basic-host`, and using `cloudflared` to expose local servers for remote
hosts.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Fix `onhostcontextchanged` handler invocation in examples
`App.onhostcontextchanged` is a setter-only property with no getter.
TypeScript doesn't prevent reading from setter-only properties, so
`app.onhostcontextchanged?.(ctx)` compiles but silently returns
`undefined` at runtime.
Extract the handler into a named `handleHostContextChanged()` function
and call it directly after `connect()`, matching the pattern used in
`basic-server-vanillajs` and other examples.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Expand Agent Skills guide
Add intro explaining what Agent Skills are and link to the two skill
files (`create-mcp-app`, `migrate-oai-app`). Reorganize headings and add
"Invoke a Skill" and "Test Your App" sections. Update `README.md` link
text and add tip to quickstart suggesting agent skills as an alternative.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* fix(e2e): improve test stability and developer experience (#337)
* fix(e2e): add masks for dynamic content and increase timeouts for slow servers
- Add HOST_MASKS for Tool Input/Result panels with dynamic timestamps
- Add say-server to SLOW_SERVERS (10s) for TTS model download
- Add say-server to EXTRA_WAIT_MS (30s) in generate-grid-screenshots
* feat: add update-lock:docker script to regenerate lockfile with public registry
* pin package versions for dev compatibility
* feat(basic-host): add ?theme=hide query param to hide theme toggle in screenshots
- Add hideThemeToggle param to getQueryParams()
- Conditionally render ThemeToggle based on ?theme=hide
- Update e2e tests to use ?theme=hide for consistent screenshots
* update screenshots
* update screenshots
* fix(husky): load Node.js environment for GUI apps like GitHub Desktop
* fix(e2e): increase map-server wait time to 15s for tile loading
* fix(e2e): increase waitForAppLoad timeout to 30s for nested iframe loading
* ci: add workflow to update e2e snapshots
* ci: trigger snapshot update on push to this branch
* chore: update e2e snapshots [skip ci]
* ci: trigger CI after snapshot update
* style: fix prettier formatting in update-snapshots workflow
* fix: pin seroval, seroval-plugins, and solid-js for dev compatibility
---------
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
* Improve README structure and clarity
Add "Why MCP Apps?" section to explain the motivation upfront. Reorganize
the "How It Works" section to lead with tool definition. Rename "Overview"
to "Using the SDK" and add "For" prefix to audience headings.
Restructure the Examples section with clearer subsections for running
examples with `basic-host` vs MCP clients using stdio transport. Move the
`qr` server note outside the collapsed details block.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Add Codex and Goose to documentation
Add Codex to the list of agents supporting skills in `agent-skills.md`.
Add Goose to the list of supported clients in `testing-mcp-apps.md` and
rename "VS Code Copilot" to "VS Code (Insiders)" for accuracy.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* chore: regenerate lockfile with public registry, use ^0.4.2 for ext-apps deps
* fix: update quickstart example to use workspace reference
* chore: remove internal registry references from lockfile
* feat(ci): add /update-snapshots comment trigger for PRs
- Comment '/update-snapshots' on any PR to update E2E snapshots
- Adds rocket reaction to acknowledge the command
- Comments back with result (updated or no changes needed)
- Removes hardcoded branch trigger
- Keeps workflow_dispatch for manual runs
* docs: document /update-snapshots PR comment trigger
* fix: pin @hono/node-server to 1.19.7 for dev compatibility
SDK 1.25.3 requires @hono/node-server@^1.19.9 which doesn't exist
on the public npm registry (latest is 1.19.7).
* fix: pin @modelcontextprotocol/sdk to 1.25.2
SDK 1.25.3 has broken dependency on @hono/node-server@^1.19.9
which doesn't exist on public npm registry.
* fix: restore flexible SDK peerDep range (^1.24.0)
devDependencies stays pinned to 1.25.2 for our builds,
but peerDependencies should allow users flexibility.
* fix: pin @types/node to avoid unpublished versions
- Pin quickstart @types/node to 22.19.5 (latest public 22.x)
- Add @types/node override to root package.json
- Regenerate lockfile with public registry only
---------
Co-authored-by: Tobin South <tobin.south@gmail.com>
Co-authored-by: Liad Yosef <liady@users.noreply.github.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: martinalong <martinalong10@gmail.com>
Co-authored-by: Ido Salomon <idosalomon@gmail.com>
Co-authored-by: Jonathan Hefner <jonathan@hefner.pro>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
* fix(e2e): add masks for dynamic content and increase timeouts for slow servers
- Add HOST_MASKS for Tool Input/Result panels with dynamic timestamps
- Add say-server to SLOW_SERVERS (10s) for TTS model download
- Add say-server to EXTRA_WAIT_MS (30s) in generate-grid-screenshots
* feat: add update-lock:docker script to regenerate lockfile with public registry
* pin package versions for dev compatibility
* feat(basic-host): add ?theme=hide query param to hide theme toggle in screenshots
- Add hideThemeToggle param to getQueryParams()
- Conditionally render ThemeToggle based on ?theme=hide
- Update e2e tests to use ?theme=hide for consistent screenshots
* update screenshots
* update screenshots
* fix(husky): load Node.js environment for GUI apps like GitHub Desktop
* fix(e2e): increase map-server wait time to 15s for tile loading
* fix(e2e): increase waitForAppLoad timeout to 30s for nested iframe loading
* ci: add workflow to update e2e snapshots
* ci: trigger snapshot update on push to this branch
* chore: update e2e snapshots [skip ci]
* ci: trigger CI after snapshot update
* style: fix prettier formatting in update-snapshots workflow
* fix: pin seroval, seroval-plugins, and solid-js for artifactory compatibility
---------
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
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>
Rewrites the Quickstart tutorial to provide a more focused, step-by-step
introduction to building MCP Apps. The guide now uses synced code fences
that pull from `examples/quickstart/`, ensuring all code shown in the
documentation is type-checked and tested.
Key improvements:
- Clearer project setup instructions with explicit commands
- Streamlined explanations of the tool + resource registration pattern
- Added screenshot showing the completed app
- E2E test coverage validates the example works end-to-end
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* feat(server): add hasUiSupport/getUiCapability for experimental+extensions
Support double-tagging for MCP Apps capability negotiation:
- Check both experimental and extensions fields in client capabilities
- Add hasUiSupport() to easily check if client supports MCP Apps
- Add getUiCapability() to retrieve the capability settings
- Update spec to document both capability locations
This enables forward compatibility as MCP transitions from experimental
to the extensions field (SEP-1724).
Claude-Generated-By: Claude Code (cli/claude-opus-4-5=100%)
Claude-Steers: 0
Claude-Permission-Prompts: 0
Claude-Escapes: 0
* fix: update @types/node version in package-lock.json
Replace invalid 22.19.5/22.19.6/22.19.7 versions with valid 22.19.3
* docs(spec): clarify hosts SHOULD double-tag, servers SHOULD check both
- Hosts SHOULD advertise capabilities in both experimental and extensions
- Servers SHOULD check both locations, preferring extensions when present
- Updated example to show double-tagging pattern
* chore: remove double-tagging recommendation, keep hasUiSupport helper
Reverts the spec changes that recommended clients double-tag capabilities
in both experimental and extensions fields. The helper functions remain
as they're useful for checking capability in either location.
* refactor(server): simplify to only getUiCapability, remove hasUiSupport
- Remove hasUiSupport function (use getUiCapability directly)
- Remove double-tagging logic (only check extensions field)
- Add ClientCapabilitiesWithExtensions type using SDK's ClientCapabilities
- Update spec to use getUiCapability
- Simplify tests
* fix: update @see link to getUiCapability
* refactor(server): inline ClientCapabilitiesWithExtensions type in getUiCapability
* refactor: move McpUiClientCapabilities to spec.types.ts
* feat(examples): add debug-server example
A comprehensive debug/development server for testing MCP Apps SDK features:
- Vanilla TypeScript UI with collapsible panels
- Message visualization (sent, received, errors)
- Server tool calling interface
- Multiple tool endpoints for testing
* refactor(debug-server): convert to React
- Replace vanilla TypeScript with React components
- Add comprehensive Host Styles panel showing all CSS variables grouped by category
- Use React hooks (useApp, useHostStyles, useAutoResize)
- Cleaner state management with useReducer for event log
- Collapsible sections for better organization
- CSS modules for scoped styling
* fix(debug-server): correct server name in main.ts
* Revert "refactor(debug-server): convert to React"
This reverts commit 5d22d2daa9a98ba412892447202ef10fbdb62f5b.
* fix(debug-server): update default values for multipleBlocks and includeMeta
* fix(debug-server): correct serve script and server name
- serve script now runs main.ts instead of server.ts
- Updated server name to 'Debug Server'
- Fixed npx command in comment
* fix: increase maxHeight to 6000px and add tools capability to debug app
- basic-host: Increase maxHeight from 600 to 6000px
- debug-server: Add tools capability to enable oncalltool/onlisttools handlers
* fix(debug-server): use consistent callback names for event tracking
Event types now match callback names (ontoolinput, ontoolresult, etc.)
so the Callback Status panel shows correct counts and payloads.
* feat(debug-server): add Update (Image) button for model context
* feat(debug-server): add expandable event log entries
- Click on any event log row to expand/collapse
- Arrow indicator rotates when expanded
- Full JSON payload shown indented in pre block
- Max height with scroll for large payloads
* style(debug-server): format long line in fullPayload function
* test(debug-server): add to E2E tests and screenshot specs
* chore: regenerate package-lock.json for cross-platform compatibility
* update dep
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>
* Add say-server: streaming TTS MCP App with karaoke UI
- Streaming TTS MCP App with real-time word highlighting
- React widget with pause/resume controls
- Debounced model context updates
- Self-contained server.py for standalone uv run
Co-authored-by: Claude <noreply@anthropic.com>
* Update server.py
* fix(say-server): fix React/Zod version conflicts in widget
- Pin Zod to v3.25.1 via esm.sh deps param (fixes .custom() error)
- Add external=react,react-dom to prevent duplicate React instances
- Update React from 19.1.0 to 19.2.0
- Import React for Babel's classic JSX transform
- Consolidate imports: only use @modelcontextprotocol/ext-apps/react
- Use Babel from unpkg.com instead of esm.sh
- Simplify resource decorator with meta= parameter
- Update CSP to allow both esm.sh and unpkg.com
* fix(say-server): show play button when paused, restart when finished
* feat(say-server): add fullscreen button, remove inline scroll
- Add fullscreen toggle button (appears on hover when available)
- Remove max-height/scroll in inline mode for cleaner display
- Enable scrolling only in fullscreen mode
- Track displayMode and fullscreenAvailable state
- Handle onHostContextChanged to detect fullscreen support
* fix(say-server): fix fullscreen button visibility and prevent multiple audio streams
- Check initial host context for fullscreen availability (not just updates)
- Add audioOperationInProgressRef guard to prevent concurrent audio operations
- Prevents race conditions from rapid clicks/double-clicks
* fix(qr-server): use meta parameter instead of manual handler patching
Simplified CSP metadata handling to match say-server's approach:
- Use meta parameter on @mcp.resource decorator directly
- Removed custom _read_resource_with_meta handler and handler replacement
* fix(say-server): simplify controls to prevent multiple audio streams
- Remove onClick from text display (was conflicting with double-click)
- Always show overlay button (with pause icon when playing)
- Lower opacity (0.3) when playing, full on hover
- Button shows: ▶️ (play), ⏸️ (pause), 🔄 (restart)
- Double-click text to restart still works
- Eliminates click/dblclick race condition
* fix(say-server): only show pause button on hover
- Play/restart buttons visible normally
- Pause button hidden until hover (doesn't block karaoke text)
* fix(say-server): fix partial input handling and session management
- Add promise lock to initTTSQueue to prevent concurrent initialization
- Reset queueIdRef and lastTextRef in ontoolresult for next tool call
- Close existing AudioContext when starting new session
- Reset all playback state (chunks, timings, position) on new session
- Fixes: text deltas not sent when new tool call has shorter text
* fix(say-server): detect new sessions by text comparison, not queueIdRef reset
- Don't reset queueIdRef in ontoolresult - audio should keep playing
- Detect new sessions in ontoolinputpartial/ontoolinput by checking if
new text starts with lastTextRef (continuation) or not (new session)
- Only reset and create new queue when genuinely new session detected
- Fixes: pause/play was creating new streams because queueIdRef was reset
* feat(say-server): add theming, floating button, and keyboard shortcuts
Theming:
- Use CSS variables (--font-sans, --color-text-primary/secondary) with fallbacks
- Apply host fonts via applyHostFonts() on connect and context changes
- Apply host style variables via applyHostStyleVariables()
- Apply document theme via applyDocumentTheme()
Floating button:
- Button follows cursor position (below current line being spoken)
- Uses invisible cursor marker element for accurate positioning
- Shows ⏸️ when playing, ▶️ when paused, 🔄 when finished
- Low opacity when playing, full on hover
Keyboard shortcuts:
- Space: toggle play/pause
- Enter: toggle fullscreen (when available)
UI changes:
- Large overlay only shown for initial play (idle state)
- Floating button used during playback for less intrusive controls
* docs(say-server): add TODO items for future improvements
* fix(say-server): simplify to fixed play button at top right
- Remove floating cursor-following button (was too complex)
- Fixed play button at top-right corner
- Low opacity when playing, full on hover
- Keep theming and keyboard shortcuts (Space/Enter)
- Add say-server to E2E tests
* test(e2e): add say-server to tests but skip in CI
Say-server requires Pocket TTS model (~500MB) and GPU support,
which isn't available in the Docker CI environment. Skip it for now.
* test(e2e): add say-server and qr-server to screenshot generation
- Remove say-server from SKIP_SERVERS (widget works without TTS model)
- Add say-server masks for play buttons
- Add both say-server and qr-server to grid screenshot generator
* fix(say-server): restore working play/pause overlay, keep theming and keyboard shortcuts
Reverted to working commit 413beca and carefully reapplied:
- CSS variables for theming (--font-sans, --color-text-primary/secondary)
- Dark mode support via @media (prefers-color-scheme)
- Host theming via applyHostStyleVariables/applyHostFonts/applyDocumentTheme
- Keyboard shortcuts: Space = play/pause, Enter = fullscreen
Preserved working behavior:
- Play overlay visible when not playing, hover to show when playing
- Pause on click works correctly
- Karaoke highlighting works
* fix(say-server): minimal CSS-only theming, no JS changes from working version
Only CSS changes from working commit 413beca:
- Added CSS variables for theming foundation
- No JavaScript changes (reverted theming calls and keyboard shortcuts)
This isolates whether the issue is CSS or JS related.
* feat(say-server): add autoPlay param and Reset button
- Add autoPlay parameter (default: true) with Pydantic Field description
- Description visible in MCP tool schema: 'browsers may block autoplay'
- Add Reset button next to Fullscreen button (bottom right)
- Both buttons share controlBtn base styles, shown on hover
- Widget reads autoPlay from tool input params
* fix(say-server): update FastMCP API for new SDK version
Python SDK refactored transport params from constructor to run():
- Remove port, stateless_http from FastMCP() constructor
- Pass stateless_http=True to streamable_http_app() instead
* debug(say-server): add console logs to trace audio stream issue
Logging added to:
- togglePlayPause (all branches)
- initTTSQueue (entry and AudioContext creation)
- restartPlayback (entry)
- ontoolinputpartial/ontoolinput (entry and new session detection)
Open browser DevTools console and reproduce the issue - logs will show what's being called.
* feat(say-server): add play/pause buttons in top-left and bottom-right corners
- Top left: playPauseTopBtn for quick access
- Bottom right: playPauseBtn alongside reset and fullscreen
- Both show on hover with same styling as other control buttons
- Icons: ▶️ (play), ⏸️ (pause), 🔄 (restart when finished)
* fix(say-server): simplify UI and fix pause/resume audio duplication
- Remove central play overlay, use single toolbar in top-right
- Fix audio duplication on pause/resume (only defer to pendingChunks for initial autoplay)
- Remove double-click to restart (use toolbar restart button)
- Sync displayMode when host changes it externally
- Click on text to play/pause
* feat(say-server): add voice selection support
- Add list_voices tool to show available voices
- Add voice parameter to say tool (predefined names, HuggingFace URLs, or local paths)
- Predefined voices: alba, marius, javert, jean, cosette, eponine, azelma, fantine
- Update README with voice documentation
* docs(say-server): improve tool description for better LLM triggering
- Add English-only constraint prominently in first line and note
- List common trigger patterns (say, speak, read aloud, etc.)
- Update text parameter description to mention English
- Keep description concise for quick LLM scanning
* feat(say-server): add speak lock for multi-widget coordination
When multiple TTS widgets exist, only one plays at a time:
- Widget announces to localStorage when starting playback
- Playing widgets poll localStorage every 200ms
- If another widget starts, previous one pauses automatically
- Lock is cleared on pause/finish/teardown
Uses _meta.widgetUUID in tool result for widget identification.
* update package.json of say
* feat(say-server): add screenshots and update README gallery
- Add say-server to demo gallery with 300x300 grid-cell.png
- Fix qr-server grid-cell.png dimensions (was 672x668, now 300x300)
- Add golden snapshot for say-server E2E tests
- Add full screenshot and grid-cell thumbnail for say-server
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* style(say-server): apply prettier formatting
- Add blank lines in README for better readability
- Add trailing newline to package.json
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Co-Authored-By: Claude <noreply@anthropic.com>
* feat(say-server): add Escape key to exit fullscreen and update docs
- Add onKeyDown handler to main element for Escape key
- Update README with full list of MCP App features:
- Model context updates
- Native theming
- Fullscreen mode
- Multi-widget speak lock
- Update server.py docstring with feature documentation
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Co-Authored-By: Claude <noreply@anthropic.com>
* fix(say-server): add queue timeout to prevent infinite polling
The TTS queue could hang forever if:
- The LLM stops generating mid-stream (no end signal)
- User cancels before tool completes
- Network interruption prevents end_tts_queue call
Changes:
- Add last_activity timestamp to track queue activity
- Add 30-second timeout (QUEUE_TIMEOUT_SECONDS)
- Poll with 5-second timeout, checking for stale queues
- Mark stale queues as "error" so widget stops polling
- Return error message in poll_tts_audio response
- Add error logging in widget polling loop
This prevents tool calls from running forever when queues are abandoned.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* debug(say-server): add logging to track queue lifecycle
Add console logging to debug why end_tts_queue might not be called:
Widget-side:
- Log queueId in ontoolinputpartial, ontoolinput, ontoolresult
- Log when new session is detected (queue reset)
- Log when initTTSQueue fails
- Log when end_tts_queue is called/not called
Server-side:
- Log when end_tts_queue is called
- Log warnings for unknown queues
- Log info for already-ended queues
This will help identify if the issue is:
- User interruption (ontoolresult never called)
- Session reset (queueId becomes null)
- Host bug (callback dropped)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* perf(say-server): add initial delay before polling
Add 150ms delay before first poll to give TTS model time to generate
the first audio chunk. This reduces unnecessary polling and server load.
Current backoff after that:
- 30ms if chunks received (keep streaming fast)
- 80ms if no chunks (wait longer for generation)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* fix(say-server): use adaptive polling instead of fixed initial delay
Previous approach: Always wait 150ms before first poll
Problem: Even when chunks are ready, we wait unnecessarily
New approach: Adaptive polling
- Start polling immediately (no initial delay)
- 20ms backoff when receiving chunks (fast streaming)
- Exponential backoff when no chunks: 50ms → 100ms → 150ms max
- Reset backoff when chunks start flowing
This reduces latency when TTS is fast while being polite when it's slow.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* feat(say-server): add speaker icon to server info
Uses SVG data URI for a speaker with sound waves icon.
* docs(say-server): add comprehensive third-party licensing information
- Expand License section in README with component attribution table
- Add voice collection license matrix with commercial use indicators
- Add warning about non-commercial expresso/ears voice collections
- Clarify NON-COMMERCIAL restriction in list_voices() output
- Use consistent CC-BY formatting (hyphenated)
* Update last activity to prevent timeout during active polling
* feat(say-server): add info button, SVG icons, and UI fixes
- Replace emoji play/pause buttons with neutral white SVG icons
- Add (i) info button in bottom-right with attribution popup
- Use app.openLink() API for external links in popup
- Add dynamic padding to fit popup when shown
- Make create_tts_queue async to fix AnyIO event loop error
- Add better error logging for TTS queue initialization
- Update README with openLink feature documentation
- Remove unnecessary HuggingFace login prerequisites
* docs(say-server): document multi-widget speak lock mechanism
* prettier:fix
---------
Co-authored-by: Claude <noreply@anthropic.com>
* feat: compile example servers to JavaScript for npm consumption
Add TypeScript compilation for server code so the example packages can be
imported and used by consumers without requiring TypeScript compilation.
Changes:
- Add tsconfig.server.json to each example for compiling server code
- Update package.json exports to point to compiled dist/server/server.js
- Add types field pointing to dist/server/server.d.ts
- Update build scripts to include server compilation step
- Fix .ts import extensions to .js in customer-segmentation-server
This enables importing the createServer function from published packages:
import { createServer } from '@modelcontextprotocol/server-basic-react';
* fix: add type assertion for Nominatim API response
* chore: regenerate schemas
* refactor: split server examples into library and binary entry points
- server.ts: exports createServer() only (library entry point)
- main.ts: entry point with main() that runs the server (binary)
- package.json: adds bin field for npx support, uses inline bun build
- tsconfig.server.json: emitDeclarationOnly, outputs to dist/
This allows:
1. Importing the server as a library: import { createServer } from '@modelcontextprotocol/server-basic-react'
2. Running with npx: npx @modelcontextprotocol/server-basic-react [--stdio]
Added migration script at scripts/migrate-server-examples.ts
* refactor: migrate remaining server examples to library/binary structure
Apply the same refactoring to all 13 remaining server examples:
- scenario-modeler-server, shadertoy-server, map-server
- cohort-heatmap-server, customer-segmentation-server, video-resource-server
- system-monitor-server, budget-allocator-server, sheet-music-server
- threejs-server, integration-server, transcript-server, wiki-explorer-server
Each now has:
- server.ts: exports createServer() (library)
- main.ts: runs the server (binary with shebang)
- bin field in package.json for npx support
* chore: remove unused server-utils.ts from video-resource-server/src
* update
* fix(build): make Windows-compatible by removing chmod and fixing bun externals
- Remove 'chmod +x dist/index.js' which doesn't exist on Windows
- Add '--external ./server.js' to prevent bun from treating the import as a second entry point
* fix(build): use .ts import for bun compatibility
- Change import from './server.js' to './server.ts' in main.ts files
- Remove --external flag since bun should inline everything
- Fixes Windows build where bun couldn't resolve .js to .ts properly
* fix(build): use --external for Windows bun compatibility
Bun on Windows incorrectly treats imported .ts files as entry points.
Use --external './server.js' to work around this, creating a runtime
dependency between index.js and server.js.
* style: fix prettier formatting in pdf-server/main.ts
* fix(build): remove quotes from --external for Windows cmd.exe compatibility
* fix(build): use glob pattern for --external to work on all platforms
The literal path --external ./server.js was not matching the import.
Using glob pattern --external "./server*" correctly externalizes the server module.
* fix(build): use */server.js pattern for --external
The "./server*" pattern was not matching on Windows.
Using "*/server.js" matches any path ending in /server.js which works cross-platform.
* fix(build): use *server.js pattern without slash for Windows compatibility
* update package-lock
* chore: regenerate package-lock.json for cross-platform compatibility
* fix(build): use ./server.js instead of glob pattern for Windows compatibility
* fix(build): use double quotes for banner to fix Windows cmd.exe compatibility
---------
Co-authored-by: Olivier Chafik <ochafik@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.
* chore: remove tamper-detection.ts (not meant to be submitted)
Follow-up to PR #234. This file was accidentally included.
* revert to srcdoc
Follow-up to PR #234 per domfarolino's review feedback.
* regen
* regen
* feat: add transcript-server example with live speech transcription
- New example: transcript-server with Web Speech API transcription
- Start/stop recording with timer display
- Live transcript with interim results
- Send button to send transcript as ui/message to host
- Copy button to copy full transcript
- Sent messages marked with divider, greyed out
- Experimental ui/update-model-context for live context updates
- Transparent background, respects host theme
- Enable microphone and clipboard in basic-host sandbox iframes
- Add allow="microphone; clipboard-write" to both outer and inner iframes
- Required for Web Speech API, audio capture, and clipboard access
- Add alert popup in basic-host for ui/message from apps
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* style: format transcript-server files
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* test: add e2e test and golden for transcript-server
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* refactor: use @types/dom-speech-recognition instead of hand-rolled types
Removes ~50 lines of manually defined Web Speech API types in favor of
the community-maintained type package.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* fix: add newlines between transcript chunks when copying to clipboard
* refactor: unify transcript formatting with timestamps
- Add formatEntry() helper that includes [timestamp] prefix
- Add formatEntries() helper that joins entries with newlines
- Use same format for clipboard copy, send message, and model context
- DRY up duplicate code in send button handler
* fix: log model context update failures instead of silently swallowing
* fix: log model context updates for debugging
* refactor: pass permissions through loadSandboxProxy like csp
- Add permissions parameter to loadSandboxProxy in implementation.ts
- Build iframe allow attribute from permissions instead of hardcoding
- Update sandbox.ts to not hardcode allow attribute (set via notification)
- Add microphone + clipboardWrite permissions to transcript-server resource
- Update README to reflect permission configuration via resource _meta.ui
* fix(transcript-server): auto-expand instead of scroll
- Remove min-height: 100vh and overflow-y: auto
- Let content grow naturally with autoResize (default)
- Remove unnecessary scrollTop calls
* test: remove transcript timer mask (no longer dynamic)
* refactor: pass permissions through loadSandboxProxy like csp
* docs: document updateModelContext for transitional speech
* test: update e2e screenshots
* refactor: use app.updateModelContext() instead of raw request
* package-lock.json
* src/generated/schema.json
* test: update e2e screenshots from CI
---------
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Introduces a new MCP App example that renders ShaderToy-compatible GLSL
fragment shaders in real-time using WebGL 2.0 and ShaderToyLite.js.
Features:
- Standard ShaderToy uniforms (`iTime`, `iResolution`, `iMouse`, etc.)
- Multi-pass rendering with buffers A-D for feedback effects
- Shader compilation error overlay
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
The `mcp-app.ts` UI was calling a `refresh-stats` tool that didn't exist
on the server, causing the example to fail. This was introduced in
PR #131 when the squash merge included the client-side change but lost
the server-side tool registration.
Fixes#200
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* feat: Add CesiumJS map server example
A WebGL-based 3D globe example that demonstrates:
- CesiumJS integration with MCP Apps
- CSP configuration for external tile servers
- worker-src directive usage for tile decoding
Tools:
- geocode: Search places via OpenStreetMap Nominatim
- show-map: Display interactive 3D globe at coordinates
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* comment out app.registerTool call for now
* prettier
* fix error handling in server-utils.ts
* refactor: rename cesium-map-server to map-server
- Rename examples/cesium-map-server to examples/map-server
- Update package name to @modelcontextprotocol/server-map
- Add README.md with documentation
* style: add min-height of 400px to map container
* feat(map-server): add fullscreen support, clean UI, sharp rendering
- Add fullscreen toggle button (only shown if host supports it)
- Use autoResize: false and manually send height of 400px
- Hide Cesium UI controls (home, scene mode picker)
- Remove location label (gets stale quickly)
- Use full device pixel ratio for sharp rendering on high-DPI displays
- Resize Cesium viewer when display mode changes
* feat(map-server): add reverse geocoding (logging only) and rounded corners
- Add camera move end listener for reverse geocoding
- Debounce Nominatim API calls (1.5s) to respect rate limits
- Log location name to console on camera move
- Add nominatim.openstreetmap.org to CSP connectDomains
- Add 8px rounded corners to map container
* fix(map-server): fix pixelated rendering on high-DPI displays
- Set canvas imageRendering to 'auto' (CesiumJS defaults to pixelated)
- Set resolutionScale to window.devicePixelRatio for native resolution
* tweaks
* update model context w/ current location
* fix(map-server): improve rendering quality and add visible extent logging
Rendering fixes:
- Remove incorrect resolutionScale = devicePixelRatio which was doubling
the scaling factor on Retina displays (2x2=4x), causing blurriness
- Disable FXAA anti-aliasing which can cause blurriness on high-DPI displays
- Keep useBrowserRecommendedResolution: false to use native devicePixelRatio
Reverse geocoding improvements:
- Add getVisibleExtent() using camera.computeViewRectangle() to get the
visible bounding box (west, south, east, north)
- Add getScaleDimensions() to calculate visible area in km
- Add calculateNominatimZoom() to map visible extent to appropriate
Nominatim zoom level (3=country to 18=building)
- Log visible extent with dimensions on each camera move
- Pass zoom parameter to Nominatim for context-aware geocoding results
- Update model context with visible area dimensions
* fix(map-server): direct positioning + wait for tiles before showing
Changes:
- Remove zoom granularity logic from reverse geocoding (was not working)
- Keep extent logging in both console and model context
- Replace flyTo animation with instant setView positioning
- Add waitForTilesLoaded() to detect when tiles finish loading
- Keep loading spinner visible until:
1. Tool input positions camera to destination
2. Tiles at destination are fully loaded
- Add 5-second fallback timeout if no tool input received
- Add 10-second timeout for tile loading to prevent infinite wait
* feat(map-server): use viewbox search to find visible places
Replace center-point reverse geocoding with Nominatim viewbox search:
- Add searchPlacesInBox() that queries Nominatim with bounded viewbox
- Uses layer=address&featuretype=settlement to find cities/towns
- Returns up to 5 visible places in the current view
- Update model context with 'Visible places: City1, City2, ...'
- Still includes center coordinates and extent dimensions
This provides better context about what's actually visible on the map
rather than just the address at the center point.
* fix(map-server): use CARTO @2x retina tiles for sharp rendering
Root cause: Standard OSM tiles are 256x256 pixels. On Retina displays
(devicePixelRatio=2), these get scaled up 2x, making them look pixelated.
Solution: Switch to CARTO Voyager tiles which provide @2x retina support:
- Detect high-DPI displays using window.devicePixelRatio
- Use 512x512 tiles with @2x suffix on Retina displays
- Use 256x256 tiles on standard displays
- Set tileWidth/tileHeight to match actual tile size
- Use CARTO subdomains (a,b,c,d) for load balancing
- Update CSP to allow CARTO tile domains
CARTO Voyager provides clean OSM-based tiles with free @2x retina support,
no API key required.
* fix(map-server): use OSM tiles and fix reverse geocoding
- Switch back from CARTO to standard OSM tiles (tile.openstreetmap.org)
for better detail and label rendering
- Fix geocoding: use reverse geocode API instead of search API
(search API requires a q= parameter, returns 400 without it)
- Update CSP domains for OSM tile server
* fix(map-server): use *.openstreetmap.org wildcard in CSP
Simplify CSP to use wildcard for both tiles and geocoding:
- connectDomains: *.openstreetmap.org covers tile.* and nominatim.*
- resourceDomains: *.openstreetmap.org for tile images
* feat(map-server): multi-point sampling for visible places
- Sample multiple points in visible extent to discover places
- Adaptive sampling based on extent size:
- < 30km: center only (city zoom)
- 30-100km: center + 2 corners
- > 100km: center + 4 quadrants
- Proper rate limiting for Nominatim (1.1s between requests)
- Shows 'Visible places: City1, City2, ...' in model context
- Fix: move geocode tool registration inside createServer()
* format
* fix(map-server): fix Express listen callback + add e2e tests
- Fix incorrect Express listen() callback signature (err param doesn't exist)
- Add map-server to e2e test suite with SLOW_SERVERS timeout (5s for tiles)
- Improve comment about experimental ui/update-model-context API
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
* 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.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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`
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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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Co-Authored-By: Claude <noreply@anthropic.com>
* 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>
* Add basic-server-vue example
Demonstrates MCP App SDK usage with Vue 3, providing framework
parity alongside the existing React and vanilla JS examples.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Add basic-server-svelte example
Demonstrates MCP App SDK usage with Svelte, providing parity
with the existing basic-server-react and basic-server-vue examples.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Add basic-server-preact example
Demonstrates MCP App SDK usage with Preact, providing another
lightweight framework option alongside the existing React, Vue,
and Svelte examples.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Add basic-server-solid example
Demonstrates MCP App SDK usage with Solid.js, providing another
reactive framework option alongside the existing React, Vue,
Svelte, and Preact examples.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Add framework GitHub links to README
Link each framework name to its official GitHub repo in basic examples
list.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Demonstrates serving binary content (video) via MCP resources using the
base64 blob pattern:
1. Server fetches video from CDN
2. Returns as base64 blob via `videos://{id}` resource template
3. Widget fetches resource and plays in `<video>` element
Includes multiple video sizes for testing (1MB to 150MB).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Demo MCP App showcasing ABC notation rendering and audio playback with:
- Server-side ABC notation validation
- Built-in audio player with play/pause and loop controls
- Sheet music visualization using abcjs library
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Centralize example server transport logic in shared utils
Move stdio/HTTP transport handling into `server-utils.ts` so example
servers only need to call `startServer(createServer)`. Switch HTTP
transport to stateless mode and remove legacy SSE endpoints.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Make example servers self-contained with local server-utils
Copy `server-utils.ts` into each example's `src/` directory so examples
can be used standalone without the shared directory. Updates imports
from `"../shared/server-utils.js"` to `"./src/server-utils.js"`.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Add `integration-server` example for E2E testing
Add dedicated `integration-server` example (duplicated from
`basic-server-react`) to preserve E2E testing capabilities while
allowing `basic-server-react` to be simplified as a minimal example.
Changes:
- Add `examples/integration-server` exercising SDK communication APIs
- Update E2E tests to use `integration-server` instead of
`basic-server-react` and `basic-server-vanillajs`
- Use server name labels instead of indices for more robust test
selection
- Remove `basic-react.png` and `basic-vanillajs.png` golden snapshots
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Co-Authored-By: Claude <noreply@anthropic.com>
* Simplify `basic-server-*` examples
- Clarify comments
- Return plain text from `get-time` tool instead of JSON
- Remove simulated cleanup delay from `onteardown`
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
* Update `package.json`
* Add TypeScript type checking to example build scripts
Add `tsc --noEmit &&` before `vite build` in all example `package.json`
files to catch type errors during builds. Previously, type errors
in `server.ts` files were not detected because Vite/Bun transpile
without type checking.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Make `_meta` optional in `McpUiAppResourceConfig`
The `_meta` and `ui` properties were required, causing TypeScript errors
when calling `registerAppResource()` without providing metadata.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Fix Zod type compatibility in `registerAppTool()`
Use `ZodRawShapeCompat | AnySchema` from SDK's `zod-compat` module
instead of raw `ZodRawShape` to resolve type errors when examples
pass `ZodObject` schemas to `registerAppTool()`.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Remove unused imports in example apps
- `basic-server-react`: Remove unused `McpUiResourceTeardownResult`
- `customer-segmentation-server`: Remove unused `PostMessageTransport`
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* Fix CI git install test for fork PRs
Use `github.event.pull_request.head.repo.full_name` to correctly
reference the fork repository when testing git installs from PRs.
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Co-Authored-By: Claude <noreply@anthropic.com>
---------
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
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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>
---------
Co-authored-by: Claude <noreply@anthropic.com>
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)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* 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.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* 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.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* ci: fix WSL build - install unzip for Bun installer
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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).
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* 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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Co-Authored-By: Claude <noreply@anthropic.com>
* 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.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* chore: add debug logging to setup-bun script
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* chore: force stdout flush in setup-bun for CI debugging
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* chore: add more debugging to setup-bun
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* chore: remove accidental test artifacts
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* chore: run setup-bun in prepare script (before build)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* chore: remove unused imports in setup-bun.mjs
Address github-code-quality bot comments.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* ci: simplify WSL build - let setup-bun.mjs handle bun installation
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
* 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
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Co-Authored-By: Claude <noreply@anthropic.com>
* Add explicit permissions to CI workflow
Set minimal read-only permissions for security best practices.
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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.
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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).
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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
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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.
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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
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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.
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Co-Authored-By: Claude <noreply@anthropic.com>
* Fix prettier formatting
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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.
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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.
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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
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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.
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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
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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.
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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.
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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
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Co-Authored-By: Claude <noreply@anthropic.com>
* Update CONTRIBUTING.md to reflect platform-agnostic screenshots
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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
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
Interactive Wikipedia link graph visualization using force-graph with:
- Force-directed graph layout for exploring page connections
- Node expansion to reveal first-degree Wikipedia links
- Visual state tracking (blue=default, green=expanded, red=error)
- Direct browser access to Wikipedia pages
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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.
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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
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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
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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)
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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)
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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
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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")
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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
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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
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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
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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
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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
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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.
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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'.
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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.
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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.
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Co-Authored-By: Claude <noreply@anthropic.com>
* release: 0.0.6
---------
Co-authored-by: Claude <noreply@anthropic.com>
Olivier Chafik
Jonathan Hefner
dependabot[bot]
Anton Pidkuiko
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