* fix(examples): use npm reference for ext-apps dependency
Replace local path '../..' with '^1.0.0' npm reference in all example
packages. The local path was accidentally published to npm, causing
npm install to hang when installing server-* packages.
Bump versions to 1.0.1 for all public packages to fix the published
versions.
Fixes npm install hanging issue in dependent projects like
example-remote-server.
Note: npm workspaces automatically resolves the dependency to the
local package during development, so no overrides are needed.
* fix: update zod to 4.x in transcript-server and fix update-lock:docker script
- Update transcript-server to use zod ^4.1.13 for compatibility
- Fix update-lock:docker script to properly clean workspace node_modules
- Regenerate package-lock.json with clean npmjs.org URLs
The main branch of the MCP Python SDK has removed `FastMCP` (likely
moving it to the standalone `fastmcp` package), causing import errors.
Pin to mcp>=1.26.0 which is the latest release that still includes
`mcp.server.fastmcp`.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
* fix(qr-server): use stable mcp SDK from PyPI
- Replace git-based mcp dependency with mcp>=1.26.0 from PyPI for stability
- Remove TransportSecuritySettings that was blocking browser connections
- Keep simple FastMCP initialization like other Python examples
Fixes ModuleNotFoundError and 403 Forbidden errors when connecting from basic-host
* fix(qr-server): use stable mcp SDK from PyPI
- Replace git-based mcp dependency with mcp>=1.26.0 from PyPI
- Add stateless_http=True for proper HTTP transport handling
- Remove TransportSecuritySettings that blocked browser connections
* 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
* docs: add local development MCP client configuration to READMEs
Add instructions for configuring MCP clients to use locally-cloned
and modified servers. This allows developers to test local changes
with MCP clients like Claude Desktop or VS Code.
- Top-level README: Added 'Local Development' section after npx config
- All TypeScript examples: Added 'Local Development' subsection with
bash one-liner that builds and runs the server
- Python examples (qr-server, say-server): Added local path config
* docs: include all servers in local development config
* docs: use bash wrapper for Python server configs to enable tilde expansion
* 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>
* feat(map-server): add screenshot to updateModelContext and remove rounded corners
- Remove border-radius and overflow: hidden from cesiumContainer CSS
- Capture map canvas as base64 PNG and include in updateModelContext
- Only include image if host supports image content blocks
* feat(map-server): reduce screenshot size for fewer tokens
- Scale down to max 256px (longest dimension)
- Use PNG for better quality with map graphics
* prettier
* 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>
`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>
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>
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>
- 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
* 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
* 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(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
* fix(map-server): simplify location update message format
* fix(say-server): pass host to streamable_http_app for non-localhost deployments
* refactor(pdf-server): simplify to stateless range-query architecture
- Remove caching/indexing in favor of direct HTTP Range requests
- Use HEAD requests to get file size (no full download)
- Use Range requests to proxy byte chunks (no caching)
- Local files: fs.read with offset/length
- Remote files: HTTP Range header
- Zero memory footprint (no PDF caching)
- Truly stateless (no session management needed)
- Single server.ts (~350 lines) + main.ts CLI entry point
- Instant startup (no preloading)
- Security: whitelist local files, allowed origins
Removed files:
- src/pdf-indexer.ts
- src/pdf-loader.ts
- src/types.ts
* feat(pdf-server): add dark mode support
- Add CSS variables with light-dark() function for automatic theme switching
- Sync theme with host via applyDocumentTheme()
- Apply host CSS variables via applyHostStyleVariables()
* feat(pdf-server): add list_pdfs tool back
Lists local files and allowed remote origins.
Also moves CHUNK_SIZE to module level constant.
* feat(pdf-server): improve tool descriptions and increase context limit
- display_pdf: list all allowed domains in description
- Increase MAX_MODEL_CONTEXT_LENGTH to 15000
- Move CHUNK_SIZE to module level constant
* chore(say-server): remove deployment docs from repo
Keep server.py fix for non-localhost deployments.
Deployment docs kept locally but not in repo.
* refactor(pdf-server): simplify updateModelContext format
- Add widget ID for multi-widget disambiguation
- Use concise header: 'PDF viewer (id) | title | Current Page: X/Y'
- Add 'Page content:' prefix before text
- Keep selection markers (<pdf-selection>...</pdf-selection>)
* refactor: rename widgetUUID to viewUUID for consistency
Aligns with main's standardization on 'view' terminology (PR #325).
Also dynamically generate allowed domains in display_pdf description.
* viewUUID
* fix(map-server): fix syntax error in location update message
* fix(pdf-server): restore package.json, improve server docs
- Restore --external pdfjs-dist in build
- Rewrite server.ts header for newcomers (list tools, not implementation details)
- Minimize main.ts diff
* chore(pdf-server): remove unused addAllowedOrigin/addAllowedLocalFile
* docs(pdf-server): update README for new architecture
* docs(pdf-server): restore full README, add theming section, remove get_pdf_info
* rm
* fix(pdf-server): restore createMcpExpressApp and error handling
- Use createMcpExpressApp for DNS rebinding protection
- Restore error callback in app.listen()
* fix(say-server): pass host to streamable_http_app for non-localhost deployments
* chore(say-server): remove deployment docs from repo
* widgetId->tool id
* fix(map-server): add null check for center in location update
chore(pdf-server): dedupe and sort allowed origins
* fix(map-server): use transparent background for rounded corners
* prettier
* docs: standardize UI terminology to use "view" consistently
Replaces "widget" and "Guest UI" terminology with "view" across
the codebase as decided in the community survey.
This change updates:
- Specification document
- SDK source code and JSDoc comments
- Example servers and documentation
- Plugin documentation and skills
Closes#71
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* feat(qr-server): embed widget HTML for self-contained usage
Embed the widget HTML directly in server.py following the same pattern
as the say-server. This allows the QR server to be run without any
local file dependencies using `uv run <url>`.
The get_widget_html() function prefers the built version from dist/
for local development but falls back to the embedded HTML for unbundled
usage.
* refactor(qr-server): remove widget.html and simplify embedded HTML
Address PR review feedback:
- Remove separate widget.html file (no longer needed)
- Remove get_widget_html() function and dist/mcp-app.html reference
- Inline EMBEDDED_WIDGET_HTML directly in widget() resource
- Remove unused Path import
The server is now fully self-contained in a single file.
---------
Co-authored-by: Claude <noreply@anthropic.com>
Add `App_onhostcontextchanged_respondToDisplayMode` example showing how to
listen for display mode changes and update UI with `classList.toggle()`.
Update `App_requestDisplayMode_fullscreen` to `App_requestDisplayMode_toggle`
to show the common toggle pattern checking `availableDisplayModes` first.
Refactor full examples (pdf-server, shadertoy-server) to use
`classList.toggle(class, condition)` instead of add/remove branches.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
After commit 65a62a9f, the server startup code was moved from server.ts
to main.ts, but the serve:http script was not updated accordingly.
This caused 9 example servers to fail to start when running npm start:
- budget-allocator-server
- cohort-heatmap-server
- customer-segmentation-server
- integration-server
- map-server
- scenario-modeler-server
- system-monitor-server
- threejs-server
- wiki-explorer-server
The server.ts file now only exports createServer(), while main.ts
contains the actual server startup logic.
- Add screenshot reference
- Remove GPU prerequisite (not needed, wasn't requested)
- Use GitHub raw URLs instead of local file paths
- Simplify Docker section
- Fix Claude Desktop config to use remote URL
* 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
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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(shadertoy): add proper mouse/touch interaction support
- Fix iMouse uniform to match official Shadertoy specification:
- iMouse.xy only updates while button/touch is held down
- iMouse.zw uses positive values when down, negative when released
- Enables proper click detection via iMouse.z > 0
- Add touch event support for mobile devices:
- touchstart/touchmove/touchend/touchcancel handlers
- Same behavior as mouse events
- Update tool description with mouse interaction documentation
- Update README with:
- Mouse & Touch Interaction feature
- Improved Julia Set example with click detection
- iMouse specification table and usage examples
The iMouse uniform is a core Shadertoy feature used by popular shaders
like Star Nest, raymarching examples, and particle systems.
* style: fix Prettier formatting in shadertoy README
* update qr-server w/ python sdk fix
* feat(qr-server): use Python SDK meta parameter for resource CSP metadata
- Update qr-server to use the new meta parameter on @mcp.resource decorator
instead of manually overriding the read_resource handler
- Add ui.resourceUri to tool meta alongside legacy ui/resourceUri for forward compatibility
- Simplify server.py by removing the custom _read_resource_with_meta handler
- Add qr-server to grid screenshot generation tests
- Update grid-cell.png screenshot
This leverages the Python SDK's native support for resource metadata,
eliminating the need for low-level handler manipulation.
Co-Authored-By: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
* fix(e2e): make server-time element fill width for consistent mask
- Add flex layout to .action p to make server-time stretch
- Add #server-time flex: 1 rule across all basic-server variants
- Update golden screenshots with full-width masked time field
This ensures the Playwright mask covers a consistent width regardless
of the timestamp content, fixing screenshot comparison flakiness.
* fix(e2e): wait for select to be enabled in screenshot generator
Match the logic in servers.spec.ts - wait for select to be enabled
(servers connected) instead of just visible.
* chore: trigger CI re-run
- Add visibility-based animation pause (IntersectionObserver + wrapped rAF)
- Zero CPU usage when widget scrolls out of view
- Apply host style variables via useHostStyles
- Support transparent WebGL background (alpha: true)
- Use light-dark() for theme-aware fallback colors
- Tool no longer echoes code back in result
- Document performance features in README
Shadertoy server improvements:
- Add ontoolinputpartial handler to show code preview during generation
- Add IntersectionObserver to pause/play shader based on visibility
- Apply host style variables (theme, colors, fonts)
- Add border-radius with fullscreen mode support
- Use gradient background and ghost text color for code preview
Skill documentation updates:
- Add streaming partial input section with use cases
- Add visibility-based resource management pattern
- Add fullscreen mode API and CSS patterns
- Expand host styling with CSS variable usage examples
Implement the conventional MCP pattern for transport backward compatibility:
try `StreamableHTTPClientTransport` first (modern), then fall back to
`SSEClientTransport` (deprecated but needed for older servers).
This follows the approach documented in the MCP TypeScript SDK's
`streamableHttpWithSseFallbackClient.ts` example.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add stdio transport configuration snippets near the top of each example
README to help users quickly set up the servers in their MCP clients.
- Node.js examples use npx with the published npm packages
- Python qr-server uses uv with local path
- Removed Claude Desktop-specific references from qr-server
* feat(shadertoy): add fullscreen support
Add fullscreen toggle button that appears when the host supports fullscreen
display mode. Uses the same pattern as pdf-server:
- Check availableDisplayModes in host context
- Show/hide button based on capability
- Toggle between inline and fullscreen via requestDisplayMode()
- Update UI state on host context changes
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* fix(shadertoy): button visibility after exiting fullscreen + Escape key
- Only update button visibility when availableDisplayModes is present
in context (partial updates don't include all fields)
- Add Escape key handler to exit fullscreen mode
🤖 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>
* fix(examples): resolve DIST_DIR path for npm package execution
When servers are compiled to dist/server.js and published to npm,
`import.meta.dirname` already points to dist/, so joining with "dist"
results in dist/dist/ which doesn't exist.
This fix detects whether we're running from TypeScript source or
compiled JavaScript and adjusts the path accordingly:
- From source (server.ts): use dist/ subdirectory
- From compiled (dist/server.js): use current directory
Fixes ENOENT errors like:
"ENOENT: no such file or directory, open '.../dist/dist/mcp-app.html'"
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* fix(pdf-server): mark pdfjs-dist as external in bundle
The pdf.worker.mjs file wasn't being found when running from npm
because bun bundled pdfjs-dist but didn't include the worker file.
By marking pdfjs-dist as external, it uses the installed package
from node_modules at runtime where the worker is available.
🤖 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>
* map-server: fix async/await in ontoolresult, remove unused getViewStorageKey
* pdf-server: fix scrolling gap in inline mode
- Set html/body background to match .main background color
This hides any gap between .main and iframe border
- Change .main from height:100% to min-height:100%
Ensures .main fills container properly
