457 changed files with 6111 additions and 69328 deletions
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@ -1,14 +0,0 @@
-{
-  "name": "mcp-apps",
-  "description": "Plugins for MCP Apps development",
-  "owner": {
-    "name": "MCP Apps"
-  },
-  "plugins": [
-    {
-      "name": "mcp-apps",
-      "source": "./plugins/mcp-apps",
-      "description": "Skills for creating MCP Apps with the MCP Apps SDK"
-    }
-  ]
-}
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -10,36 +10,6 @@ permissions:
  contents: read

 jobs:
-  prettier-fix:
-    name: Auto-fix formatting
-    if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-    steps:
-      - uses: actions/checkout@v6
-        with:
-          ref: ${{ github.head_ref }}
-          token: ${{ github.token }}
-
-      - uses: actions/setup-node@v6
-        with:
-          node-version: "22"
-          cache: npm
-
-      - run: npm ci
-
-      - run: npm run prettier:fix
-
-      - name: Commit formatting changes
-        run: |
-          git diff --quiet && exit 0
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          git add -A
-          git commit -m "style: auto-fix prettier formatting"
-          git push
-
  build:
    strategy:
      fail-fast: false
@ -60,29 +30,20 @@ jobs:
    runs-on: ${{ matrix.os }}

    steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4

      - name: Verify no private URLs in package-lock.json
        shell: bash
        run: '! grep -E "\"resolved\": \"https?://" package-lock.json | grep -v registry.npmjs.org'

-      - name: Verify example dependency versions
-        shell: bash
-        run: node scripts/check-versions.mjs
-
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v4
        with:
-          node-version: "22"
-          cache: npm
+          node-version: "20"

-      - run: npm ci
+      - run: npm install

      - run: npm run build

-      - name: Validate TypeDoc links
-        if: runner.os == 'Linux' && matrix.name == 'Linux x64'
-        run: npm exec typedoc -- --treatValidationWarningsAsErrors --emit none
-
      - run: npm run examples:build

      - name: Verify generated schemas are up-to-date
@ -91,72 +52,33 @@ jobs:
          npm run generate:schemas
          git diff --exit-code src/generated/ || (echo "Generated schemas are out of date. Run 'npm run generate:schemas' and commit." && exit 1)

-      - name: Verify synced snippets are up-to-date
-        shell: bash
-        run: |
-          npm run sync:snippets
-          git diff --exit-code src/ docs/ || (echo "Synced snippets are out of date. Run 'npm run sync:snippets' and commit." && exit 1)
-
      - run: npm test

      - run: npm run prettier

-      - name: Build MCPB bundle (pdf-server)
-        if: runner.os == 'Linux' && matrix.name == 'Linux x64'
-        run: node build-mcpb.mjs
-        working-directory: examples/pdf-server
-
-      - name: Smoke-test MCPB bundle starts
-        if: runner.os == 'Linux' && matrix.name == 'Linux x64'
-        run: |
-          unzip -q pdf-server.mcpb -d .mcpb-smoke
-          node .mcpb-smoke/dist/index.js --stdio < /dev/null 2>&1 | tee /tmp/mcpb-smoke.log
-          grep -q "Ready" /tmp/mcpb-smoke.log
-        working-directory: examples/pdf-server
-
-  dependency-isolation:
-    name: Dependency isolation
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v6
-
-      - uses: actions/setup-node@v6
-        with:
-          node-version: "22"
-          cache: npm
-
-      - run: npm ci
-
-      - run: npm run test:dependency-isolation
-
  e2e:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4

      - uses: oven-sh/setup-bun@v2
        with:
          bun-version: latest

-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v4
        with:
-          node-version: "22"
-          cache: npm
-
-      - uses: astral-sh/setup-uv@v7
+          node-version: "20"

      - run: npm ci

-      # Headless runs without a channel use chromium-headless-shell, so the
-      # full Chromium build (about 165 MB) would only be downloaded, never run.
      - name: Install Playwright browsers
-        run: npx playwright install --with-deps --only-shell chromium
+        run: npx playwright install --with-deps chromium

      - name: Run E2E tests
        run: npx playwright test --reporter=list

      - name: Upload test results
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v4
        if: failure()
        with:
          name: test-results
@ -169,9 +91,9 @@ jobs:
    runs-on: windows-latest

    steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4

-      - uses: Vampire/setup-wsl@v6
+      - uses: Vampire/setup-wsl@v5
        with:
          distribution: Ubuntu-24.04

@ -179,18 +101,13 @@ jobs:
        shell: wsl-bash {0}
        run: |
          sudo apt-get update
-          curl -fsSL https://deb.nodesource.com/setup_22.x | sudo -E bash -
+          curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -
          sudo apt-get install -y nodejs

-      # The checkout lives on the Windows drive, which WSL reaches over 9P;
-      # writing node_modules there is what makes this job slow (npm ci alone
-      # took about 3 minutes). Copy the tree onto the distro's ext4 filesystem
-      # first, as Microsoft's WSL guidance recommends for anything I/O heavy.
      - name: Build and test in WSL
        shell: wsl-bash {0}
        run: |
-          cp -r "$(pwd)" ~/ext-apps && cd ~/ext-apps
-          npm ci
+          npm install
          npm run build
          npm run examples:build
          npm test
@ -217,20 +134,17 @@ jobs:
    runs-on: ${{ matrix.os }}

    steps:
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v4
        with:
-          node-version: "22"
+          node-version: "20"

      - name: Create test project and install from git
        shell: bash
-        env:
-          HEAD_REPO: ${{ github.event.pull_request.head.repo.full_name || github.repository }}
-          HEAD_REF: ${{ github.head_ref || github.ref_name }}
        run: |
          mkdir test-project
          cd test-project
          npm init -y
-          # Install from the PR branch (use head repo for fork PRs)
-          npm install "git+https://github.com/${HEAD_REPO}#${HEAD_REF}"
+          # Install from the PR branch
+          npm install "git+https://github.com/${{ github.repository }}#${{ github.head_ref || github.ref_name }}"
          # Verify the package is usable (ESM import)
          node --input-type=module -e "import { App } from '@modelcontextprotocol/ext-apps'; console.log('Import successful:', typeof App)"
--- a/.github/workflows/docs-preview.yml
+++ b/.github/workflows/docs-preview.yml
@ -1,65 +0,0 @@
-name: Docs Preview
-
-on:
-  pull_request:
-    types: [opened, synchronize, reopened, closed]
-    paths:
-      - "docs/**"
-      - "src/**"
-      - "README.md"
-      - "typedoc.config.mjs"
-      - "scripts/typedoc-*.mjs"
-      - ".github/workflows/docs-preview.yml"
-
-permissions:
-  contents: read
-  pull-requests: write
-
-concurrency:
-  group: docs-preview-${{ github.event.pull_request.number }}
-  cancel-in-progress: true
-
-jobs:
-  build-and-deploy:
-    # Refuse to run for fork PRs — forks do not have access to the Cloudflare
-    # secrets, so deploys would fail anyway.
-    if: >-
-      github.event.action != 'closed' &&
-      github.event.pull_request.head.repo.full_name == github.repository
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v6
-
-      - uses: actions/setup-node@v6
-        with:
-          node-version: "22"
-          cache: npm
-
-      - run: npm ci
-
-      - run: npm run build
-
-      - run: npm run docs
-
-      - name: Deploy preview
-        uses: modelcontextprotocol/actions/cloudflare-pages-preview/deploy@main
-        with:
-          directory: docs
-          project-name: mcp-ext-apps-docs-preview
-          api-token: ${{ secrets.CF_PAGES_PREVIEW_API_TOKEN }}
-          account-id: ${{ secrets.CF_PAGES_PREVIEW_ACCOUNT_ID }}
-          comment-title: "📖 Docs Preview Deployed"
-          comment-marker: "<!-- docs-preview-comment -->"
-
-  cleanup:
-    if: >-
-      github.event.action == 'closed' &&
-      github.event.pull_request.head.repo.full_name == github.repository
-    runs-on: ubuntu-latest
-    steps:
-      - uses: modelcontextprotocol/actions/cloudflare-pages-preview/cleanup@main
-        with:
-          project-name: mcp-ext-apps-docs-preview
-          api-token: ${{ secrets.CF_PAGES_PREVIEW_API_TOKEN }}
-          account-id: ${{ secrets.CF_PAGES_PREVIEW_ACCOUNT_ID }}
-          comment-marker: "<!-- docs-preview-comment -->"
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@ -12,13 +12,12 @@ jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4
      - uses: oven-sh/setup-bun@v2
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v4
        with:
-          node-version: "22"
-          cache: npm
-      - run: npm ci
+          node-version: "20"
+      - run: npm install
      - run: npm run build
      - run: npm run docs
      - uses: peaceiris/actions-gh-pages@v4
@ -27,4 +26,3 @@ jobs:
          publish_dir: ./docs
          publish_branch: gh-pages
          keep_files: true
-          cname: apps.extensions.modelcontextprotocol.io
--- a/.github/workflows/npm-publish.yml
+++ b/.github/workflows/npm-publish.yml
@ -14,11 +14,11 @@ jobs:
    permissions:
      contents: read
    steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4
      - uses: oven-sh/setup-bun@v2
        with:
          bun-version: latest
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v4
        with:
          node-version: "22"
          cache: npm
@ -31,21 +31,17 @@ jobs:
    permissions:
      contents: read
    steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4
      - uses: oven-sh/setup-bun@v2
        with:
          bun-version: latest
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v4
        with:
          node-version: "22"
          cache: npm
      - run: npm ci
      - run: npm test

-  # All publish jobs depend directly on [build, test] (not on each other) so
-  # they all enter "waiting for approval" together and can be approved in a
-  # single "Review deployments" click.
-
  publish:
    runs-on: ubuntu-latest
    if: github.event_name == 'release'
@ -57,11 +53,11 @@ jobs:
      id-token: write

    steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4
      - uses: oven-sh/setup-bun@v2
        with:
          bun-version: latest
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v4
        with:
          node-version: "22"
          cache: npm
@ -87,97 +83,3 @@ jobs:
      - run: npm publish --provenance --access public ${{ steps.npm-tag.outputs.tag }}
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
-
-  publish-examples:
-    runs-on: ubuntu-latest
-    if: github.event_name == 'release'
-    environment: Release
-    needs: [build, test]
-
-    permissions:
-      contents: read
-      id-token: write
-
-    strategy:
-      fail-fast: false
-      matrix:
-        example:
-          - basic-server-preact
-          - basic-server-react
-          - basic-server-solid
-          - basic-server-svelte
-          - basic-server-vanillajs
-          - basic-server-vue
-          - budget-allocator-server
-          - cohort-heatmap-server
-          - customer-segmentation-server
-          - debug-server
-          - lazy-auth-server
-          - map-server
-          - pdf-server
-          - scenario-modeler-server
-          - shadertoy-server
-          - sheet-music-server
-          - system-monitor-server
-          - threejs-server
-          - transcript-server
-          - video-resource-server
-          - wiki-explorer-server
-
-    steps:
-      - uses: actions/checkout@v6
-      - uses: oven-sh/setup-bun@v2
-        with:
-          bun-version: latest
-      - uses: actions/setup-node@v6
-        with:
-          node-version: "22"
-          cache: npm
-          registry-url: "https://registry.npmjs.org"
-      - run: npm ci
-
-      - name: Build example
-        run: npm run build --workspace examples/${{ matrix.example }}
-
-      - name: Determine npm tag
-        id: npm-tag
-        run: |
-          VERSION=$(node -p "require('./package.json').version")
-          if [[ "$VERSION" == *"-"* ]]; then
-            echo "tag=--tag beta" >> $GITHUB_OUTPUT
-          else
-            echo "tag=" >> $GITHUB_OUTPUT
-          fi
-
-      - name: Publish example
-        run: npm publish --workspace examples/${{ matrix.example }} --provenance --access public ${{ steps.npm-tag.outputs.tag }}
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
-
-  publish-mcpb:
-    runs-on: ubuntu-latest
-    if: github.event_name == 'release'
-    environment: Release
-    needs: [build, test]
-
-    permissions:
-      contents: write
-
-    steps:
-      - uses: actions/checkout@v6
-      - uses: oven-sh/setup-bun@v2
-        with:
-          bun-version: latest
-      - uses: actions/setup-node@v6
-        with:
-          node-version: "22"
-          cache: npm
-      - run: npm ci
-
-      - name: Build pdf-server + MCPB bundle
-        run: npm run build:mcpb --workspace examples/pdf-server
-
-      - name: Upload MCPB to release
-        run: gh release upload "${{ github.event.release.tag_name }}" examples/pdf-server/*.mcpb --clobber
-        env:
-          GH_TOKEN: ${{ github.token }}
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@ -13,35 +13,11 @@ jobs:
  pkg-publish:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-node@v6
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
        with:
          node-version: 22
          cache: npm
      - run: npm ci
      - run: npm run build
-      - run: npm run examples:build
-      - run: |
-          npx pkg-pr-new publish \
-            . \
-            ./examples/basic-server-preact \
-            ./examples/basic-server-react \
-            ./examples/basic-server-solid \
-            ./examples/basic-server-svelte \
-            ./examples/basic-server-vanillajs \
-            ./examples/basic-server-vue \
-            ./examples/budget-allocator-server \
-            ./examples/cohort-heatmap-server \
-            ./examples/customer-segmentation-server \
-            ./examples/debug-server \
-            ./examples/lazy-auth-server \
-            ./examples/map-server \
-            ./examples/pdf-server \
-            ./examples/scenario-modeler-server \
-            ./examples/shadertoy-server \
-            ./examples/sheet-music-server \
-            ./examples/system-monitor-server \
-            ./examples/threejs-server \
-            ./examples/transcript-server \
-            ./examples/video-resource-server \
-            ./examples/wiki-explorer-server
+      - run: npx pkg-pr-new publish
--- a/.github/workflows/update-snapshots.yml
+++ b/.github/workflows/update-snapshots.yml
@ -1,108 +0,0 @@
-name: Update E2E Snapshots
-
-on:
-  workflow_dispatch:
-    inputs:
-      branch:
-        description: "Branch to update snapshots on"
-        required: true
-        default: "main"
-  issue_comment:
-    types: [created]
-
-permissions:
-  contents: write
-  pull-requests: write
-
-jobs:
-  update-snapshots:
-    # Run on workflow_dispatch OR when a maintainer comments "/update-snapshots" on a PR.
-    # author_association check prevents arbitrary commenters from triggering a job with
-    # contents:write that pushes a [skip ci] commit to the PR branch.
-    if: >
-      github.event_name == 'workflow_dispatch' ||
-      (github.event.issue.pull_request &&
-      contains(github.event.comment.body, '/update-snapshots') &&
-      contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.comment.author_association))
-    runs-on: ubuntu-latest
-    steps:
-      - name: Get PR branch
-        if: github.event_name == 'issue_comment'
-        id: pr
-        uses: actions/github-script@v8
-        with:
-          script: |
-            const pr = await github.rest.pulls.get({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              pull_number: context.issue.number
-            });
-            core.setOutput('ref', pr.data.head.ref);
-            core.setOutput('sha', pr.data.head.sha);
-
-      - name: Add reaction to comment
-        if: github.event_name == 'issue_comment'
-        uses: actions/github-script@v8
-        with:
-          script: |
-            await github.rest.reactions.createForIssueComment({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              comment_id: context.payload.comment.id,
-              content: 'rocket'
-            });
-
-      - uses: actions/checkout@v6
-        with:
-          ref: ${{ github.event.inputs.branch || steps.pr.outputs.ref || github.ref }}
-          token: ${{ secrets.GITHUB_TOKEN }}
-
-      - uses: oven-sh/setup-bun@v2
-        with:
-          bun-version: latest
-
-      - uses: actions/setup-node@v6
-        with:
-          node-version: "22"
-          cache: npm
-
-      - uses: astral-sh/setup-uv@v7
-
-      - run: npm ci
-
-      - name: Install Playwright browsers
-        run: npx playwright install --with-deps chromium
-
-      - name: Update snapshots
-        run: npx playwright test --update-snapshots --reporter=list
-
-      - name: Commit updated snapshots
-        id: commit
-        run: |
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          git add tests/e2e/**/*.png
-          if git diff --staged --quiet; then
-            echo "changed=false" >> $GITHUB_OUTPUT
-            echo "No snapshot changes to commit"
-          else
-            git commit -m "chore: update e2e snapshots [skip ci]"
-            git push
-            echo "changed=true" >> $GITHUB_OUTPUT
-          fi
-
-      - name: Comment on PR
-        if: github.event_name == 'issue_comment'
-        uses: actions/github-script@v8
-        with:
-          script: |
-            const changed = '${{ steps.commit.outputs.changed }}' === 'true';
-            const body = changed
-              ? '✅ Snapshots updated and pushed to this branch.'
-              : '✅ No snapshot changes needed - all snapshots are up to date.';
-            await github.rest.issues.createComment({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              issue_number: context.issue.number,
-              body
-            });
--- a/.gitignore
+++ b/.gitignore
@ -11,10 +11,3 @@ intermediate-findings/
 # Playwright
 playwright-report/
 test-results/
-__pycache__/
-*.pyc
-
-# MCPB bundles (built artifacts)
-*.mcpb
-.mcpb-stage/
-.mcpb-smoke/
--- a/.husky/pre-commit
+++ b/.husky/pre-commit
@ -1,12 +1,3 @@
-# Load Node.js environment for GUI apps (GitHub Desktop, etc.)
-# that don't inherit shell PATH
-export NVM_DIR="$HOME/.nvm"
-[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"  # nvm
-[ -s "$HOME/.fnm/fnm" ] && eval "$(~/.fnm/fnm env)"  # fnm
-[ -s "$HOME/.volta/bin/volta" ] && export PATH="$HOME/.volta/bin:$PATH"  # volta
-[ -d "/opt/homebrew/bin" ] && export PATH="/opt/homebrew/bin:$PATH"  # homebrew (macOS ARM)
-[ -d "/usr/local/bin" ] && export PATH="/usr/local/bin:$PATH"  # homebrew (macOS Intel)
-
 # Verify no private registry URLs in package-lock.json
 if grep -E '"resolved": "https?://' package-lock.json | grep -v registry.npmjs.org > /dev/null; then
  echo "ERROR: package-lock.json contains non-npmjs.org URLs"
@ -14,16 +5,8 @@ if grep -E '"resolved": "https?://' package-lock.json | grep -v registry.npmjs.o
  exit 1
 fi

-# Capture staged files so we only re-stage what the user intended to commit
-# (avoids sweeping unrelated WIP into the commit). --diff-filter=d skips
-# deletions so the xargs git add below doesn't fail on removed paths.
-STAGED=$(git diff --name-only --cached --diff-filter=d)
-
 npm run build:all
 npm run prettier:fix

-# Re-stage originally-staged files (prettier may have reformatted them)
-echo "$STAGED" | xargs -r git add
-
-# Also stage generated files (regenerated by build:all from spec.types.ts)
+# Stage any changes to generated files (they may have been reformatted by prettier)
 git add src/generated/
--- a/.npmrc
+++ b/.npmrc
@ -1 +0,0 @@
-registry=https://registry.npmjs.org/
--- a/.prettierignore
+++ b/.prettierignore
@ -1,9 +1,6 @@
 examples/basic-host/**/*.ts
 examples/basic-host/**/*.tsx
-examples/basic-server-*/**/*.ts
-examples/basic-server-*/**/*.tsx
-examples/quickstart/**/*.ts
-**/vendor/**
-**/.build/**
-**/.claude/**
-SKILL.md
+examples/basic-server-react/**/*.ts
+examples/basic-server-react/**/*.tsx
+examples/basic-server-vanillajs/**/*.ts
+examples/basic-server-vanillajs/**/*.tsx
--- a/AGENTS.md
+++ b/AGENTS.md
@ -1,103 +0,0 @@
-# MCP Apps SDK
-
-## Project Overview
-
-MCP Apps SDK (`@modelcontextprotocol/ext-apps`) enables MCP servers to display interactive UIs in conversational clients.
-
-Key abstractions:
-
- **View** - UI running in an iframe, uses `App` class with `PostMessageTransport` to communicate with host
- **Host** - Chat client embedding the iframe, uses `AppBridge` class to proxy MCP requests
- **Server** - MCP server that registers tools/resources with UI metadata
-
-Specification (stable): `specification/2026-01-26/apps.mdx`
-
-## Commands
-
-```bash
-# Install dependencies
-npm install
-
-# Build the SDK only (generates schemas + bundles, does not build examples)
-npm run build
-
-# Build everything (SDK + all examples)
-npm run build:all
-
-# Type check + build a single example
-npm run --workspace examples/<example-name> build
-
-# Run all examples (starts server at http://localhost:8080)
-npm start
-
-# Run E2E tests (primary testing mechanism - starts examples server automatically)
-npm run test:e2e
-
-# Run unit tests (E2E tests have broader coverage; unit tests cover specific modules)
-npm test
-
-# Check JSDoc comment syntax and `{@link}` references
-npm exec typedoc -- --treatValidationWarningsAsErrors --emit none
-
-# Regenerate package-lock.json
-# Note: repo .npmrc pins registry to npmjs.org, so a plain `npm i` is safe even
-# if your global npm config points elsewhere. The Docker step below is optional
-# — it locks linux-amd64 optionalDependencies (sharp, rollup, bun) for CI.
-rm -fR  package-lock.json node_modules && \
-  docker run  --rm -it --platform linux/amd64 -v $PWD:/src:rw -w /src node:latest npm i && \
-  rm -fR node_modules && \
-  npm  i  --cache=~/.npm-mcp-apps --registry=https://registry.npmjs.org/
-```
-
-## Architecture
-
-### SDK Entry Points
-
- `@modelcontextprotocol/ext-apps` - Main SDK for Apps (`App` class, `PostMessageTransport`)
- `@modelcontextprotocol/ext-apps/react` - React hooks (`useApp`, `useHostStyleVariables`, etc.)
- `@modelcontextprotocol/ext-apps/app-bridge` - SDK for hosts (`AppBridge` class)
- `@modelcontextprotocol/ext-apps/server` - Server helpers (`registerAppTool`, `registerAppResource`)
-
-### Key Source Files
-
- `src/app.ts` - `App` subclasses `Protocol` from `@modelcontextprotocol/client`, handles View initialization, tool calls, and messaging
- `src/app-bridge.ts` - `AppBridge` subclasses `Protocol` from `@modelcontextprotocol/client` for the iframe channel and proxies through a separate outer `Client`
- `src/server/index.ts` - Helpers for MCP servers to register tools/resources with UI metadata
- `src/types.ts` - Protocol types re-exported from `spec.types.ts` and Zod schemas from `generated/schema.ts` (auto-generated during build)
- `src/message-transport.ts` - `PostMessageTransport` for iframe communication
- `src/react/` - React hooks: `useApp`, `useHostStyles`, `useAutoResize`, `useDocumentTheme`
-
-### Protocol Flow
-
-```
-View (App/Protocol) <--PostMessageTransport--> Host (AppBridge/Protocol) <--separate MCP Client--> MCP Server
-```
-
-1. Host creates iframe with view HTML
-2. View creates `App` instance and calls `connect()` with `PostMessageTransport`
-3. View sends `ui/initialize` (the only handshake on the iframe channel) and receives authoritative Apps capabilities and context
-4. Host sends `sendToolInput()` with tool arguments after initialization
-5. View can call server tools via `app.callServerTool()` or send messages via `app.sendMessage()`
-6. Host sends `sendToolResult()` when tool execution completes
-7. Host calls `teardownResource()` before unmounting iframe
-
-## Documentation
-
-JSDoc `@example` tags should pull type-checked code from companion `.examples.ts` files (e.g., `app.ts` → `app.examples.ts`). Use ` ```ts source="./file.examples.ts#regionName" ` fences referencing `//#region regionName` blocks; region names follow `exportedName_variant` or `ClassName_methodName_variant` pattern (e.g., `useApp_basicUsage`, `App_hostCapabilities_checkAfterConnection`). For whole-file inclusion (any file type), omit the `#regionName`. Run `npm run sync:snippets` to sync.
-
-Standalone docs in `docs/` (listed in `typedoc.config.mjs` `projectDocuments`) can also have type-checked companion `.ts`/`.tsx` files using the same pattern.
-
-## Full Examples
-
-Uses npm workspaces. Full examples in `examples/` are separate packages:
-
- `basic-server-*` - Starter templates (vanillajs, react, vue, svelte, preact, solid). Use these as the basis for new examples.
- `basic-host` - Reference host implementation
- Other examples showcase specific features (charts, 3D, video, etc.)
-
-## Claude Code Plugin
-
-The `plugins/mcp-apps/` directory contains a Claude Code plugin distributed via the plugin marketplace. It provides the following Claude Code skills files:
-
- `plugins/mcp-apps/skills/create-mcp-app/SKILL.md` — for creating an MCP App
- `plugins/mcp-apps/skills/migrate-oai-app/SKILL.md` — for migrating an app from the OpenAI Apps SDK to the MCP Apps SDK
--- a/CLAUDE.md
+++ b/CLAUDE.md
@ -1 +0,0 @@
-AGENTS.md
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@ -25,15 +25,6 @@ We welcome contributions to the MCP Apps SDK! This document outlines the process
 - Update documentation as needed
 - Keep changes focused and atomic
 - Provide a clear description of changes
- **Keep "Allow edits by maintainers" checked** when opening your PR — this lets maintainers rebase your branch and lets the [`/update-snapshots` workflow](#updating-snapshots-in-ci) push updated screenshots to it
-
-## Examples Policy
-
-The examples in `examples/` are maintained by the core team. **We do not accept pull requests that add new example servers from outside contributors.** Each example carries an ongoing maintenance cost — keeping it building, tested, and up to date with SDK changes — so we are deliberate about what we add.
-
-If you have an idea for an example that would provide significant educational value, please [open an issue](https://github.com/modelcontextprotocol/ext-apps/issues) describing what the example would demonstrate and why it would be useful, and maintainers will evaluate the request.
-
-PRs that add new examples without a prior approved issue may be closed.

 ## Running Examples

@ -49,408 +40,6 @@ Or build and run examples:
 npm run examples:start
 ```

-### With MCP Clients
-
-To use these examples with MCP clients that support the stdio transport (such as Claude Desktop or VS Code), add this MCP server configuration to your client's settings:
-
-<details>
-<summary>MCP client configuration for all examples (using stdio)</summary>
-
-```json
-{
-  "mcpServers": {
-    "basic-react": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-basic-react",
-        "--stdio"
-      ]
-    },
-    "basic-vanillajs": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-basic-vanillajs",
-        "--stdio"
-      ]
-    },
-    "basic-vue": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-basic-vue",
-        "--stdio"
-      ]
-    },
-    "basic-svelte": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-basic-svelte",
-        "--stdio"
-      ]
-    },
-    "basic-preact": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-basic-preact",
-        "--stdio"
-      ]
-    },
-    "basic-solid": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-basic-solid",
-        "--stdio"
-      ]
-    },
-    "budget-allocator": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-budget-allocator",
-        "--stdio"
-      ]
-    },
-    "cohort-heatmap": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-cohort-heatmap",
-        "--stdio"
-      ]
-    },
-    "customer-segmentation": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-customer-segmentation",
-        "--stdio"
-      ]
-    },
-    "map": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-map",
-        "--stdio"
-      ]
-    },
-    "pdf": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-pdf",
-        "--stdio"
-      ]
-    },
-    "scenario-modeler": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-scenario-modeler",
-        "--stdio"
-      ]
-    },
-    "shadertoy": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-shadertoy",
-        "--stdio"
-      ]
-    },
-    "sheet-music": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-sheet-music",
-        "--stdio"
-      ]
-    },
-    "system-monitor": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-system-monitor",
-        "--stdio"
-      ]
-    },
-    "threejs": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-threejs",
-        "--stdio"
-      ]
-    },
-    "transcript": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-transcript",
-        "--stdio"
-      ]
-    },
-    "video-resource": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-video-resource",
-        "--stdio"
-      ]
-    },
-    "wiki-explorer": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "--silent",
-        "--registry=https://registry.npmjs.org/",
-        "@modelcontextprotocol/server-wiki-explorer",
-        "--stdio"
-      ]
-    },
-    "qr": {
-      "command": "uv",
-      "args": [
-        "run",
-        "/path/to/ext-apps/examples/qr-server/server.py",
-        "--stdio"
-      ]
-    },
-    "say": {
-      "command": "uv",
-      "args": [
-        "run",
-        "--default-index",
-        "https://pypi.org/simple",
-        "https://raw.githubusercontent.com/modelcontextprotocol/ext-apps/refs/heads/main/examples/say-server/server.py",
-        "--stdio"
-      ]
-    }
-  }
-}
-```
-
-</details>
-
-> [!NOTE]
-> The `qr` server requires cloning the repository first. See [qr-server README](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/qr-server) for details.
-
-### Local Development
-
-To test local modifications with MCP clients, first clone and install the repository:
-
-```bash
-git clone https://github.com/modelcontextprotocol/ext-apps.git
-cd ext-apps
-npm install
-```
-
-Then configure your MCP client to build and run the local server. Replace `~/src/ext-apps` with your actual clone path.
-
-Most example servers have a `start:stdio` script that builds and launches in stdio mode:
-
-<details>
-<summary>MCP client configuration for local development (all examples)</summary>
-
-```json
-{
-  "mcpServers": {
-    "basic-react": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/basic-server-react && npm --silent run start:stdio"
-      ]
-    },
-    "basic-vanillajs": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/basic-server-vanillajs && npm --silent run start:stdio"
-      ]
-    },
-    "basic-vue": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/basic-server-vue && npm --silent run start:stdio"
-      ]
-    },
-    "basic-svelte": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/basic-server-svelte && npm --silent run start:stdio"
-      ]
-    },
-    "basic-preact": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/basic-server-preact && npm --silent run start:stdio"
-      ]
-    },
-    "basic-solid": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/basic-server-solid && npm --silent run start:stdio"
-      ]
-    },
-    "budget-allocator": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/budget-allocator-server && npm --silent run start:stdio"
-      ]
-    },
-    "cohort-heatmap": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/cohort-heatmap-server && npm --silent run start:stdio"
-      ]
-    },
-    "customer-segmentation": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/customer-segmentation-server && npm --silent run start:stdio"
-      ]
-    },
-    "map": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/map-server && npm --silent run start:stdio"
-      ]
-    },
-    "pdf": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/pdf-server && npm --silent run start:stdio"
-      ]
-    },
-    "scenario-modeler": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/scenario-modeler-server && npm --silent run start:stdio"
-      ]
-    },
-    "shadertoy": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/shadertoy-server && npm --silent run start:stdio"
-      ]
-    },
-    "sheet-music": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/sheet-music-server && npm --silent run start:stdio"
-      ]
-    },
-    "system-monitor": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/system-monitor-server && npm --silent run start:stdio"
-      ]
-    },
-    "threejs": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/threejs-server && npm --silent run start:stdio"
-      ]
-    },
-    "transcript": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/transcript-server && npm --silent run start:stdio"
-      ]
-    },
-    "video-resource": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/video-resource-server && npm --silent run start:stdio"
-      ]
-    },
-    "wiki-explorer": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/src/ext-apps/examples/wiki-explorer-server && npm --silent run start:stdio"
-      ]
-    },
-    "qr": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "uv run ~/src/ext-apps/examples/qr-server/server.py --stdio"
-      ]
-    },
-    "say": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "uv run --index https://pypi.org/simple ~/src/ext-apps/examples/say-server/server.py --stdio"
-      ]
-    }
-  }
-}
-```
-
-</details>
-
-This configuration rebuilds each server on launch, ensuring your local changes are picked up.
-
 ## Testing

 ### Unit Tests
@ -490,19 +79,9 @@ npm run test:e2e:update -- --grep "Three.js"

 **Note**: Golden screenshots are platform-agnostic. Tests use canvas masking and tolerance thresholds to handle minor cross-platform rendering differences.

-#### Updating Snapshots in CI
-
-If E2E tests fail in CI due to screenshot mismatches, you can update snapshots directly from your PR:
-
-1. Comment `/update-snapshots` on the PR
-2. The workflow will update snapshots and push to your branch
-3. A comment will confirm when complete
-
-Alternatively, use the [workflow dispatch](https://github.com/modelcontextprotocol/ext-apps/actions/workflows/update-snapshots.yml) to manually trigger updates for any branch.
-
 ## Code of Conduct

-This project follows our [Code of Conduct](https://github.com/modelcontextprotocol/.github/blob/main/CODE_OF_CONDUCT.md). Please review it before contributing.
+This project follows our [Code of Conduct](CODE_OF_CONDUCT.md). Please review it before contributing.

 ## Reporting Issues

@ -539,17 +118,40 @@ Before publishing releases, ensure the following are configured:

 ### Publishing a Release

-1. **Bump the version** across the root and all workspace packages:
+Releases are published automatically via GitHub Actions when a GitHub Release is created.
+
+#### Steps to publish:
+
+1. **Update the version** in `package.json`:

   ```bash
-   npm run bump -- minor   # or: patch | major | prerelease --preid=beta | 1.7.0
+   # For a regular release
+   npm version patch  # or minor, or major
+
+   # For a beta release
+   npm version prerelease --preid=beta
   ```

-   Commit and open a PR with a grouped changelog in the body (see prior `chore: bump …` PRs for the format).
+2. **Commit the version bump** (if not done by `npm version`):

-2. **Merge the PR**, then [draft a GitHub Release](https://github.com/modelcontextprotocol/ext-apps/releases/new) — create a `vX.Y.Z` tag on `main`, paste the changelog, publish.
+   ```bash
+   git add package.json
+   git commit -m "Bump version to X.Y.Z"
+   git push origin main
+   ```

-3. **Approve the deployment** — publishing the Release triggers the [npm-publish workflow](https://github.com/modelcontextprotocol/ext-apps/actions/workflows/npm-publish.yml); all publish jobs wait together for a single "Review deployments" approval.
+3. **Create a GitHub Release**:
+   - Go to [Releases](https://github.com/modelcontextprotocol/ext-apps/releases)
+   - Click "Draft a new release"
+   - Create a new tag matching the version (e.g., `v0.1.0`)
+   - Set the target branch (usually `main`)
+   - Write release notes describing the changes
+   - Click "Publish release"
+
+4. **Monitor the workflow**:
+   - The [npm-publish workflow](https://github.com/modelcontextprotocol/ext-apps/actions/workflows/npm-publish.yml) will trigger automatically
+   - It runs build and test jobs before publishing
+   - On success, the package is published to npm with provenance

 #### npm Tags

@ -573,7 +175,7 @@ To release a patch for an older version:

 ### Testing Pre-releases

-Every commit and PR automatically publishes a preview package via [pkg-pr-new](https://github.com/stackblitz-labs/pkg.pr.new). Check the PR comments or workflow logs for the install command.
+Every commit and PR automatically publishes a preview package via [pkg-pr-new](https://github.com/pkg-pr-new/pkg-pr-new). Check the PR comments or workflow logs for the install command.

 ---

--- a/197
+++ b/197
@ -1,193 +1,6 @@
-The MCP project is undergoing a licensing transition from the MIT License to the Apache License, Version 2.0 ("Apache-2.0"). All new code and specification contributions to the project are licensed under Apache-2.0. Documentation contributions (excluding specifications) are licensed under CC-BY-4.0.
-
-Contributions for which relicensing consent has been obtained are licensed under Apache-2.0. Contributions made by authors who originally licensed their work under the MIT License and who have not yet granted explicit permission to relicense remain licensed under the MIT License.
-
-No rights beyond those granted by the applicable original license are conveyed for such contributions.
-
---
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
-      other entities that control, are controlled by, or are under common
-      control with that entity. For the purposes of this definition,
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-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
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-
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-
-   END OF TERMS AND CONDITIONS
-
---
-
 MIT License

-Copyright (c) 2024-2025 Model Context Protocol a Series of LF Projects, LLC.
+Copyright (c) 2025 Anthropic, PBC

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@ -206,11 +19,3 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
-
---
-
-Creative Commons Attribution 4.0 International (CC-BY-4.0)
-
-Documentation in this project (excluding specifications) is licensed under
-CC-BY-4.0. See https://creativecommons.org/licenses/by/4.0/legalcode for
-the full license text.
--- a/README.md
+++ b/README.md
@ -1,284 +1,70 @@
-<!-- LOGO -->
-<div align="center">
-  <picture>
-    <source media="(prefers-color-scheme: dark)" srcset="media/mcp-white.svg">
-    <source media="(prefers-color-scheme: light)" srcset="media/mcp.svg">
-    <img src="media/mcp.svg" alt="MCP Apps" width="128">
-  </picture>
-  <h1>MCP Apps</h1>
-  <p>
-    Build interactive UIs for MCP tools — charts, forms, dashboards — that render inline in Claude, ChatGPT and any other compliant chat client.
-    <br /><br />
-    <a href="#why-mcp-apps">Why</a>
-    ·
-    <a href="https://apps.extensions.modelcontextprotocol.io/api/documents/quickstart.html">Quickstart</a>
-    ·
-    <a href="https://apps.extensions.modelcontextprotocol.io/api/">API Docs</a>
-    ·
-    <a href="https://github.com/modelcontextprotocol/ext-apps/blob/main/specification/2026-01-26/apps.mdx">Spec</a>
-    ·
-    <a href="CONTRIBUTING.md">Contributing</a>
-  </p>
-</div>
+# @modelcontextprotocol/ext-apps

-<p align="center">
-  <a href="https://github.com/modelcontextprotocol/ext-apps/actions/workflows/ci.yml"><img src="https://github.com/modelcontextprotocol/ext-apps/actions/workflows/ci.yml/badge.svg" alt="CI"></a>
-  <a href="LICENSE"><img src="https://img.shields.io/badge/license-Apache%202.0-blue" alt="License: Apache 2.0"></a>
-  <a href="https://www.npmjs.com/package/@modelcontextprotocol/ext-apps"><img src="https://img.shields.io/npm/v/@modelcontextprotocol/ext-apps.svg" alt="npm version"></a>
-  <a href="https://www.npmjs.com/package/@modelcontextprotocol/ext-apps"><img src="https://img.shields.io/npm/dm/@modelcontextprotocol/ext-apps.svg" alt="npm downloads"></a>
-  <a href="https://github.com/modelcontextprotocol/ext-apps"><img src="https://img.shields.io/github/stars/modelcontextprotocol/ext-apps" alt="GitHub stars"></a>
-  <a href="https://apps.extensions.modelcontextprotocol.io/api/"><img src="https://img.shields.io/badge/docs-API%20Reference-blue" alt="API Documentation"></a>
-</p>
+[![npm version](https://img.shields.io/npm/v/@modelcontextprotocol/ext-apps.svg)](https://www.npmjs.com/package/@modelcontextprotocol/ext-apps) [![API Documentation](https://img.shields.io/badge/docs-API%20Reference-blue)](https://modelcontextprotocol.github.io/ext-apps/api/)

-<p align="center">
-  <img src="media/excalidraw.gif" alt="MCP Apps demo" width="600">
-  <br><em>Excalidraw built with MCP Apps, running in Claude</em>
-</p>
+This repo contains the SDK and [specification](https://github.com/modelcontextprotocol/ext-apps/blob/main/specification/draft/apps.mdx) for MCP Apps Extension ([SEP-1865](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/1865)).

-## Table of Contents
+MCP Apps are a proposed standard inspired by [MCP-UI](https://mcpui.dev/) and [OpenAI's Apps SDK](https://developers.openai.com/apps-sdk/) to allow MCP Servers to display interactive UI elements in conversational MCP clients / chatbots.

- [Build with Agent Skills](#build-with-agent-skills)
- [Supported Clients](#supported-clients)
- [Why MCP Apps?](#why-mcp-apps)
- [How It Works](#how-it-works)
- [Getting Started](#getting-started)
- [Using the SDK](#using-the-sdk)
- [Examples](#examples)
- [Specification](#specification)
- [Resources](#resources)
- [Contributing](#contributing)
+## Overview

-## Build with Agent Skills
+This SDK serves two audiences:

-The fastest way to build an MCP App is to let your AI coding agent do it. This
-repo ships four [Agent Skills](https://agentskills.io/) — install them once,
-then just ask:
+### App Developers

-| Skill                                                                       | What it does                                                | Try it                                |
-| --------------------------------------------------------------------------- | ----------------------------------------------------------- | ------------------------------------- |
-| [`create-mcp-app`](./plugins/mcp-apps/skills/create-mcp-app/SKILL.md)       | Scaffolds a new MCP App with an interactive UI from scratch | _"Create an MCP App"_                 |
-| [`migrate-oai-app`](./plugins/mcp-apps/skills/migrate-oai-app/SKILL.md)     | Converts an existing OpenAI App to use MCP Apps             | _"Migrate from OpenAI Apps SDK"_      |
-| [`add-app-to-server`](./plugins/mcp-apps/skills/add-app-to-server/SKILL.md) | Adds interactive UI to an existing MCP server's tools       | _"Add UI to my MCP server"_           |
-| [`convert-web-app`](./plugins/mcp-apps/skills/convert-web-app/SKILL.md)     | Turns an existing web app into a hybrid web + MCP App       | _"Add MCP App support to my web app"_ |
+Build interactive UIs that run inside MCP-enabled chat clients.

-### Install the Skills
+- **SDK for Apps**: `@modelcontextprotocol/ext-apps` — [API Docs](https://modelcontextprotocol.github.io/ext-apps/api/modules/app.html)
+- **React hooks**: `@modelcontextprotocol/ext-apps/react` — [API Docs](https://modelcontextprotocol.github.io/ext-apps/api/modules/_modelcontextprotocol_ext-apps_react.html)

-**Claude Code** — install via the plugin marketplace:
+### Host Developers

-```
-/plugin marketplace add modelcontextprotocol/ext-apps
-/plugin install mcp-apps@modelcontextprotocol-ext-apps
-```
+Embed and communicate with MCP Apps in your chat application.

-**Other agents** — any AI coding agent that supports
-[Agent Skills](https://agentskills.io/) can use these skills. See the
-[agent skills guide](./docs/agent-skills.md) for manual installation
-instructions.
+- **SDK for Hosts**: `@modelcontextprotocol/ext-apps/app-bridge` — [API Docs](https://modelcontextprotocol.github.io/ext-apps/api/modules/app-bridge.html)

-Once installed, verify by asking your agent _"What skills do you have?"_ — you
-should see `create-mcp-app`, `migrate-oai-app`, `add-app-to-server`, and
-`convert-web-app` in the list. Then just ask it to create or migrate an app and
-it will guide you through the rest.
+There's no _supported_ host implementation in this repo (beyond the [examples/basic-host](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-host) example).

-## Supported Clients
+We have [contributed a tentative implementation](https://github.com/MCP-UI-Org/mcp-ui/pull/147) of hosting / iframing / sandboxing logic to the [MCP-UI](https://github.com/idosal/mcp-ui) repository, and expect OSS clients may use it, while other clients might roll their own hosting logic.

-<p align="center">
-  <a href="https://developers.openai.com/apps-sdk/mcp-apps-in-chatgpt/"><img src="https://img.shields.io/badge/ChatGPT-docs-74aa9c?logo=openai&logoColor=white" alt="ChatGPT"></a>
-  <a href="https://claude.com/docs/connectors/building/mcp-apps/getting-started"><img src="https://img.shields.io/badge/Claude-docs-d97706?logo=claude&logoColor=white" alt="Claude"></a>
-  <a href="https://code.visualstudio.com/blogs/2026/01/26/mcp-apps-support"><img src="https://img.shields.io/badge/VS_Code-docs-007ACC?logo=visualstudiocode&logoColor=white" alt="VS Code"></a>
-  <a href="https://block.github.io/goose/docs/tutorials/building-mcp-apps/"><img src="https://img.shields.io/badge/Goose-docs-000000?logo=goose&logoColor=white" alt="Goose"></a>
-  <a href="https://learning.postman.com/docs/postman-ai/mcp-requests/interact"><img src="https://img.shields.io/badge/Postman-docs-FF6C37?logo=postman&logoColor=white" alt="Postman"></a>
-  <a href="https://www.mcpjam.com/blog/mcp-apps-example"><img src="https://img.shields.io/badge/MCPJam-docs-8B5CF6" alt="MCPJam"></a>
-  <a href="https://manufact.com/inspector"><img src="https://img.shields.io/badge/mcp--use-inspector-E5F3FD" alt="mcp-use"></a>
-  <a href="https://docs.alpic.ai/distribution/playground"><img src="https://img.shields.io/badge/Alpic-playground-E90060?logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAMAAABHPGVmAAAAKlBMVEUKDhz%2F%2F%2F%2BjpaogJDFBRE%2Fw8PHHyMvh4eNmaHF1d4CUlpuFho2ztLhWWWP5YkbJAAAACXBIWXMAAAsTAAALEwEAmpwYAAAB1klEQVR42u2Y0ZKDIAxFBQQF8f9%2FdyW7dhAu7U7Iy87mzvShGfXU3CTGLotKpVKpVCqV6h%2FI2VuxfF3tUwcdVEccA2LNS%2BWCq2mUykG%2BCtg5iNmv76mllOApCPHrFQgNxJf8HHIQs10XdFtDKcEKPQ0x4brg6htKWGr0PIR8jq0tj4oQgJiIzD8rtATErMAWMj%2FxIYcBPjuPgoENcW3Jks%2BdLeXS32jLmise%2BZxQ8GRD%2BkkCbSlByi0Pgm3p0P6nJ1meXJ%2F8K1tKo7qUOFM4wdxEMMS4iSp9sqFJQrZ4hOZBTEa5gbaQ%2BTwI%2FcCu8TOq482xIWZkSx8MfAi0xcOEJTZkULKohXjm29epGU2SIGK%2BfT9J%2Bjre%2BRBYsiUYBSHkaEI2B0EInRx%2BkbApiB89EaMgBNdx7u5vDoJH79ne3yQElqxvEzYLKY%2Bl81PCZiFUsvlDwqYhw80uSkJg4z8Ttsss3OltwgQgMGGPlpSAwITVM0wCgius6iARCGzJcn%2BHJCSMXraCIATPsPW2SggCh364a1sIgveUew%2BTgtBGsuE9zDspyLBZ3M5aVCOCUDFlqXUbrm8j7%2FnvJ2B9G3kf%2BZBlt0iu%2Fr%2BNxHqRU6lUKpVKpVL9UX0BOrAPfcbTY8UAAAAASUVORK5CYII%3D" alt="Alpic Playground"></a>
-</p>
-
-> [!NOTE]
-> MCP Apps is an extension to the
-> [core MCP specification](https://modelcontextprotocol.io/specification). Host
-> support varies — see the
-> [clients page](https://modelcontextprotocol.io/clients) for the full list.
-
-## Why MCP Apps?
-
-MCP tools return text and structured data. That works for many cases, but not
-when you need an interactive UI, like a chart, form, design canvas or video player.
-
-MCP Apps provide a standardized way to deliver interactive UIs from MCP servers.
-Your UI renders inline in the conversation, in context, in any compliant host.
-
-## How It Works
-
-MCP Apps extend the Model Context Protocol by letting tools declare UI
-resources:
-
-1. **Tool definition** — Your tool declares a `ui://` resource containing its
-   HTML interface
-2. **Tool call** — The LLM calls the tool on your server
-3. **Host renders** — The host fetches the resource and displays it in a
-   sandboxed iframe
-4. **Bidirectional communication** — The host passes tool data to the UI via
-   notifications, and the UI can call other tools through the host
-
-## Getting Started
-
-Requires Node.js 20+. The base MCP SDK packages are `^2.0.0` peers of
-`ext-apps` (`@modelcontextprotocol/core` is a required peer that `client` already depends on, so npm installs it for you).
-
-For a View or host:
+## Installation

 ```bash
-npm install -S @modelcontextprotocol/ext-apps \
-  @modelcontextprotocol/client@^2.0.0 \
-  zod@^4.2.0
+npm install -S @modelcontextprotocol/ext-apps
 ```

-For an MCP server, add the server package (and, for HTTP transports, the Node
-and Express adapters):
+Or edit your `package.json` manually:

-```bash
-npm install -S @modelcontextprotocol/ext-apps \
-  @modelcontextprotocol/client@^2.0.0 \
-  @modelcontextprotocol/server@^2.0.0 \
-  @modelcontextprotocol/node@^2.0.0 \
-  @modelcontextprotocol/express@^2.0.0 \
-  zod@^4.2.0
+```json
+{
+  "dependencies": {
+    "@modelcontextprotocol/ext-apps": "^0.0.1"
+  }
+}
 ```

-The wire protocol is unchanged between `ext-apps` 1.x and 2.x: a 2.x View works
-in a 1.x host and a 2.x host renders 1.x Views. See the
-[migration guide](https://apps.extensions.modelcontextprotocol.io/api/documents/migrate-to-v2.html)
-when upgrading from 1.x.
-
-**New here?** Start with the
-[Quickstart Guide](https://apps.extensions.modelcontextprotocol.io/api/documents/quickstart.html)
-to build your first MCP App.
-
-## Using the SDK
-
-The SDK serves three roles: app developers building interactive Views, host
-developers embedding those Views, and MCP server authors registering tools with
-UI metadata.
-
-| Package                                     | Purpose                                                   | Docs                                                                                                                |
-| ------------------------------------------- | --------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------- |
-| `@modelcontextprotocol/ext-apps`            | Build interactive Views (App class, PostMessageTransport) | [API Docs →](https://apps.extensions.modelcontextprotocol.io/api/modules/app.html)                                  |
-| `@modelcontextprotocol/ext-apps/react`      | React hooks for Views (useApp, useHostStyles, etc.)       | [API Docs →](https://apps.extensions.modelcontextprotocol.io/api/modules/_modelcontextprotocol_ext-apps_react.html) |
-| `@modelcontextprotocol/ext-apps/app-bridge` | Embed and communicate with Views in your chat client      | [API Docs →](https://apps.extensions.modelcontextprotocol.io/api/modules/app-bridge.html)                           |
-| `@modelcontextprotocol/ext-apps/server`     | Register tools and resources on your MCP server           | [API Docs →](https://apps.extensions.modelcontextprotocol.io/api/modules/server-helpers.html)                       |
-
-There's no _supported_ host implementation in this repo (beyond the
-[examples/basic-host](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-host)
-example).
-
-The [MCP-UI](https://github.com/idosal/mcp-ui) client SDK offers a
-fully-featured MCP Apps framework used by a few hosts. Clients may choose to use
-it or roll their own implementation.
-
 ## Examples

-The
-[`examples/`](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples)
-directory contains demo apps showcasing real-world use cases.
+Start with these foundational examples to learn the SDK:

-<!-- prettier-ignore-start -->
-| | | |
-|:---:|:---:|:---:|
-| [![Map](examples/map-server/grid-cell.png "Interactive 3D globe viewer using CesiumJS")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/map-server) | [![Three.js](examples/threejs-server/grid-cell.png "Interactive 3D scene renderer")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/threejs-server) | [![ShaderToy](examples/shadertoy-server/grid-cell.png "Real-time GLSL shader renderer")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/shadertoy-server) |
-| [**Map**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/map-server) | [**Three.js**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/threejs-server) | [**ShaderToy**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/shadertoy-server) |
-| [![Sheet Music](examples/sheet-music-server/grid-cell.png "ABC notation to sheet music")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/sheet-music-server) | [![Wiki Explorer](examples/wiki-explorer-server/grid-cell.png "Wikipedia link graph visualization")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/wiki-explorer-server) | [![Cohort Heatmap](examples/cohort-heatmap-server/grid-cell.png "Customer retention heatmap")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/cohort-heatmap-server) |
-| [**Sheet Music**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/sheet-music-server) | [**Wiki Explorer**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/wiki-explorer-server) | [**Cohort Heatmap**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/cohort-heatmap-server) |
-| [![Scenario Modeler](examples/scenario-modeler-server/grid-cell.png "SaaS business projections")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/scenario-modeler-server) | [![Budget Allocator](examples/budget-allocator-server/grid-cell.png "Interactive budget allocation")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/budget-allocator-server) | [![Customer Segmentation](examples/customer-segmentation-server/grid-cell.png "Scatter chart with clustering")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/customer-segmentation-server) |
-| [**Scenario Modeler**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/scenario-modeler-server) | [**Budget Allocator**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/budget-allocator-server) | [**Customer Segmentation**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/customer-segmentation-server) |
-| [![System Monitor](examples/system-monitor-server/grid-cell.png "Real-time OS metrics")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/system-monitor-server) | [![Transcript](examples/transcript-server/grid-cell.png "Live speech transcription")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/transcript-server) | [![Video Resource](examples/video-resource-server/grid-cell.png "Binary video via MCP resources")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/video-resource-server) |
-| [**System Monitor**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/system-monitor-server) | [**Transcript**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/transcript-server) | [**Video Resource**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/video-resource-server) |
-| [![PDF Server](examples/pdf-server/grid-cell.png "Interactive PDF viewer with chunked loading")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/pdf-server) | [![QR Code](examples/qr-server/grid-cell.png "QR code generator")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/qr-server) | [![Say Demo](examples/say-server/grid-cell.png "Text-to-speech demo")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/say-server) |
-| [**PDF Server**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/pdf-server) | [**QR Code (Python)**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/qr-server) | [**Say Demo**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/say-server) |
+- [`examples/basic-server-vanillajs`](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-vanillajs) — Example MCP server with tools that return UI Apps (vanilla JS)
+- [`examples/basic-server-react`](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-react) — Example MCP server with tools that return UI Apps (React)
+- [`examples/basic-host`](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-host) — Bare-bones example of hosting MCP Apps

-### Starter Templates
+The [`examples/`](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples) directory contains additional demo apps showcasing real-world use cases.

-| | |
-|:---:|:---|
-| [![Basic](examples/basic-server-react/grid-cell.png "Starter template")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-react) | The same app built with different frameworks — pick your favorite!<br><br>[React](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-react) · [Vue](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-vue) · [Svelte](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-svelte) · [Preact](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-preact) · [Solid](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-solid) · [Vanilla JS](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-vanillajs) |
-<!-- prettier-ignore-end -->
-
-### Running the Examples
-
-#### With basic-host
-
-To run all examples locally using
-[basic-host](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-host)
-(the reference host implementation included in this repo):
+To run all examples together:

 ```bash
-git clone https://github.com/modelcontextprotocol/ext-apps.git
-cd ext-apps
 npm install
-npm start
+npm run examples:start
 ```

 Then open http://localhost:8080/.

-#### With MCP Clients
-
-Every Node.js example is published as `@modelcontextprotocol/server-<name>`. To
-add one to an MCP client that supports stdio (Claude Desktop, VS Code, etc.),
-use this pattern:
-
-```json
-{
-  "mcpServers": {
-    "<name>": {
-      "command": "npx",
-      "args": ["-y", "@modelcontextprotocol/server-<name>", "--stdio"]
-    }
-  }
-}
-```
-
-For example, to add the map server: `@modelcontextprotocol/server-map`. The
-Python examples (`qr-server`, `say-server`) use `uv run` instead — see their
-READMEs for details.
-
-#### Local Development
-
-To test local modifications with an MCP client, clone the repo, install, then
-point your client at a local build:
-
-```json
-{
-  "mcpServers": {
-    "<name>": {
-      "command": "bash",
-      "args": [
-        "-c",
-        "cd ~/code/ext-apps/examples/<name>-server && npm run build >&2 && node dist/index.js --stdio"
-      ]
-    }
-  }
-}
-```
-
-## Specification
-
-<div align="center">
-
-| Version        | Status      | Link                                                                                                                              |
-| -------------- | ----------- | --------------------------------------------------------------------------------------------------------------------------------- |
-| **2026-01-26** | Stable      | [specification/2026-01-26/apps.mdx](https://github.com/modelcontextprotocol/ext-apps/blob/main/specification/2026-01-26/apps.mdx) |
-| **draft**      | Development | [specification/draft/apps.mdx](https://github.com/modelcontextprotocol/ext-apps/blob/main/specification/draft/apps.mdx)           |
-
-</div>
-
 ## Resources

- [Quickstart Guide](https://apps.extensions.modelcontextprotocol.io/api/documents/quickstart.html)
- [API Documentation](https://apps.extensions.modelcontextprotocol.io/api/)
- [Specification (2026-01-26)](https://github.com/modelcontextprotocol/ext-apps/blob/main/specification/2026-01-26/apps.mdx)
-  ([Draft](https://github.com/modelcontextprotocol/ext-apps/blob/main/specification/draft/apps.mdx))
+- [Quickstart Guide](https://modelcontextprotocol.github.io/ext-apps/api/documents/Quickstart.html)
+- [API Documentation](https://modelcontextprotocol.github.io/ext-apps/api/)
+- [Draft Specification](https://github.com/modelcontextprotocol/ext-apps/blob/main/specification/draft/apps.mdx)
 - [SEP-1865 Discussion](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/1865)
-
-## Contributing
-
-Contributions are welcome! Please read [CONTRIBUTING.md](CONTRIBUTING.md) for
-guidelines on how to get started, submit pull requests, and report issues.
--- a/RELEASES.md
+++ b/RELEASES.md
@ -1,64 +0,0 @@
-# Release Notes
-
-## 0.3.0
-
-### Breaking Changes
-
- **`viewport` replaced with `containerDimensions`** — The `viewport` property in host context has been replaced with `containerDimensions`, which provides a clearer distinction between fixed dimensions and maximum constraints. The new type allows specifying either `height` or `maxHeight`, and either `width` or `maxWidth` by @martinalong in [#153](https://github.com/modelcontextprotocol/ext-apps/pull/153)
-
-### New Examples
-
- **Video resource server** — Demonstrates video resource handling with proper mimeType declarations by @antonpk1 in [#175](https://github.com/modelcontextprotocol/ext-apps/pull/175)
- **Sheet music server** — Interactive sheet music notation example by @jonathanhefner in [#196](https://github.com/modelcontextprotocol/ext-apps/pull/196)
-
-### Developer Experience
-
- **`npm start` alias** — Added `npm start` as alias for `npm run examples:start` by @jonathanhefner in [#183](https://github.com/modelcontextprotocol/ext-apps/pull/183)
- **Examples cleanup** — Improved consistency across example servers by @jonathanhefner in [#182](https://github.com/modelcontextprotocol/ext-apps/pull/182)
- **Documentation fixes** — Fixed tsc command in docs to use tsconfig.json by @blackgirlbytes in [#188](https://github.com/modelcontextprotocol/ext-apps/pull/188)
-
-### Bug Fixes
-
- **Move prettier to dev dependency** — Fixed incorrect dependency classification by @niclim in [#179](https://github.com/modelcontextprotocol/ext-apps/pull/179)
- **Fix build errors in examples** — Resolved build issues across example servers by @jonathanhefner in [#180](https://github.com/modelcontextprotocol/ext-apps/pull/180)
-
-**Full Changelog**: https://github.com/modelcontextprotocol/ext-apps/compare/v0.2.2...v0.3.0
-
---
-
-## 0.2.2
-
-Changes from 0.1.x to 0.2.2.
-
-### Highlights
-
- **Server helpers** — New `registerAppTool()` and `registerAppResource()` simplify server setup with proper type safety. `connect()` now defaults to `PostMessageTransport(window.parent)`, enabling simpler initialization with just `await app.connect()` by @ochafik in [#165](https://github.com/modelcontextprotocol/ext-apps/pull/165)
- **Tool visibility control** — New `visibility` array field controls whether tools are visible to the agent, apps, or both. Restructured `_meta` format from flat `"ui/resourceUri"` to nested `_meta.ui.resourceUri` by @jonathanhefner in [#131](https://github.com/modelcontextprotocol/ext-apps/pull/131)
- **Host-provided theming** — Apps receive 36 standardized CSS variables for colors, typography, and spacing via `styles.variables`, enabling visual consistency with the host by @martinalong in [#127](https://github.com/modelcontextprotocol/ext-apps/pull/127)
- **Display mode requests** — Apps can request display mode changes (e.g., fullscreen) via `requestDisplayMode`, with hosts able to accept or reject by @martinalong in [#152](https://github.com/modelcontextprotocol/ext-apps/pull/152)
- **Custom fonts support** — Apps can receive custom fonts via `styles.css.fonts` and apply them using `applyHostFonts()` or `useHostFonts()` helpers by @martinalong in [#159](https://github.com/modelcontextprotocol/ext-apps/pull/159)
-
-### API Changes
-
- **MCP SDK as peer dependency** — Consumers control their SDK version, reducing duplication by @ochafik in [#168](https://github.com/modelcontextprotocol/ext-apps/pull/168)
- **React as peer dependency** — Supports React 17, 18, and 19 by @ochafik in [#164](https://github.com/modelcontextprotocol/ext-apps/pull/164)
- **Renamed request methods** — Removed `send` prefix: `openLink()` and `teardownResource()`. Deprecated aliases maintained by @ochafik in [#161](https://github.com/modelcontextprotocol/ext-apps/pull/161)
- **Optional Client in AppBridge** — Enables custom forwarding scenarios without direct MCP client access by @ochafik in [#146](https://github.com/modelcontextprotocol/ext-apps/pull/146)
- **Zod v3 and v4 support** — Bring your own Zod by @alpic-ai in [#49](https://github.com/modelcontextprotocol/ext-apps/pull/49)
- **Zod schemas now version-agnostic** — Generated schemas work with both Zod 3.25+ and v4, using `z.object().passthrough()` instead of v4-only `z.looseObject()` by @ochafik in [#178](https://github.com/modelcontextprotocol/ext-apps/pull/178)
-
-### Platform & DX
-
- **Windows compatibility** — Bun as optional dependency with automatic setup, `cross-env` for examples. Just run `npm install` by @ochafik in [#145](https://github.com/modelcontextprotocol/ext-apps/pull/145)
- **Widened `@oven/bun-*` version range** — Lowered the minimum from `^1.3.4` to `^1.2.21`, helping contributors whose registries may not have the latest packages by @ochafik in [#176](https://github.com/modelcontextprotocol/ext-apps/pull/176)
- **SSE transport support** — All examples now support both stdio and HTTP transports with SSE endpoints for older clients by @ochafik in [#136](https://github.com/modelcontextprotocol/ext-apps/pull/136)
- **Playwright E2E tests** — Screenshot golden testing across all 9 example servers with parallel execution (~28s) by @ochafik in [#115](https://github.com/modelcontextprotocol/ext-apps/pull/115)
- **hostContext exposure** — Access `hostContext` directly from the `App` class by @ochafik in [#139](https://github.com/modelcontextprotocol/ext-apps/pull/139)
-
-### Bug Fixes
-
- **Responsive UIs** — Fixed narrow viewport handling for mobile and sidebar experiences by @ochafik in [#135](https://github.com/modelcontextprotocol/ext-apps/pull/135)
- **Sandbox notification fix** — Fixed `sandbox-ready` notification name to match implementation by @ochafik in [#160](https://github.com/modelcontextprotocol/ext-apps/pull/160)
- **Fixed non-UI tool registration** — Use `server.registerTool` for tools without UI and fix missing imports across examples by @ochafik in [#173](https://github.com/modelcontextprotocol/ext-apps/pull/173)
-
-**Full Changelog**: https://github.com/modelcontextprotocol/ext-apps/compare/v0.1.1...v0.2.2
--- a/SECURITY.md
+++ b/SECURITY.md
@ -1,21 +0,0 @@
-# Security Policy
-
-Thank you for helping keep the Model Context Protocol and its ecosystem secure.
-
-## Reporting Security Issues
-
-If you discover a security vulnerability in this repository, please report it through
-the [GitHub Security Advisory process](https://docs.github.com/en/code-security/security-advisories/guidance-on-reporting-and-writing-information-about-vulnerabilities/privately-reporting-a-security-vulnerability)
-for this repository.
-
-Please **do not** report security vulnerabilities through public GitHub issues, discussions,
-or pull requests.
-
-## What to Include
-
-To help us triage and respond quickly, please include:
-
- A description of the vulnerability
- Steps to reproduce the issue
- The potential impact
- Any suggested fixes (optional)
--- a/build.bun.ts
+++ b/build.bun.ts
@ -1,25 +1,13 @@
 #!/usr/bin/env bun
 import { $ } from "bun";
-import { cpSync, mkdirSync, rmSync } from "node:fs";
-
-// Avoid publishing artifacts left behind by an earlier build or branch.
-rmSync("dist", { recursive: true, force: true });

 // Run TypeScript compiler for type declarations
 await $`tsc`;

-// Copy schema.json (tsc is emitDeclarationOnly, Bun.build doesn't emit JSON assets).
-// Needed for the "./schema.json" package export.
-mkdirSync("dist/src/generated", { recursive: true });
-cpSync("src/generated/schema.json", "dist/src/generated/schema.json");
-
 const isDevelopment = Bun.env.NODE_ENV === "development";

 // Build all JavaScript/TypeScript files
-function buildJs(
-  entrypoint: string,
-  opts: Partial<Parameters<(typeof Bun)["build"]>[0]> = {},
-) {
+function buildJs(entrypoint: string, opts: Record<string, any> = {}) {
  return Bun.build({
    entrypoints: [entrypoint],
    outdir: "dist",
@ -34,40 +22,21 @@ function buildJs(
  });
 }

-// Peer dependencies stay external in the standard entry points so consumers
-// share one base MCP SDK and Zod instance. The *-with-deps entry points keep
-// bundling these dependencies for standalone browser use.
-const PEER_EXTERNALS = [
-  "@modelcontextprotocol/client",
-  "@modelcontextprotocol/core",
-  "@modelcontextprotocol/server",
-  "zod",
-];
-
 await Promise.all([
  buildJs("src/app.ts", {
    outdir: "dist/src",
-    external: PEER_EXTERNALS,
-  }),
-  buildJs("src/app.ts", {
-    outdir: "dist/src",
-    naming: { entry: "app-with-deps.js" },
+    external: ["@modelcontextprotocol/sdk"],
  }),
  buildJs("src/app-bridge.ts", {
    outdir: "dist/src",
-    external: PEER_EXTERNALS,
+    external: ["@modelcontextprotocol/sdk"],
  }),
  buildJs("src/react/index.tsx", {
    outdir: "dist/src/react",
-    external: ["react", "react-dom", ...PEER_EXTERNALS],
-  }),
-  buildJs("src/react/index.tsx", {
-    outdir: "dist/src/react",
-    external: ["react", "react-dom"],
-    naming: { entry: "react-with-deps.js" },
+    external: ["react", "react-dom", "@modelcontextprotocol/sdk"],
  }),
  buildJs("src/server/index.ts", {
    outdir: "dist/src/server",
-    external: PEER_EXTERNALS,
+    external: ["@modelcontextprotocol/sdk"],
  }),
 ]);
--- a/docs/agent-skills.md
+++ b/docs/agent-skills.md
@ -1,73 +0,0 @@
---
-title: Agent Skills
-group: Getting Started
-description: Use Agent Skills to build, migrate, and extend MCP Apps with AI coding agents. Install skills that scaffold new apps, convert OpenAI Apps, and add UI to existing servers.
---
-
-# Agent Skills
-
-[Agent Skills](https://agentskills.io/) are instruction sets that guide AI coding agents through tasks. When you invoke a skill, the agent takes the lead — it asks clarifying questions, makes decisions based on your codebase, and executes the work.
-
-This repository provides four skills:
-
- [**create-mcp-app**](https://github.com/modelcontextprotocol/ext-apps/blob/main/plugins/mcp-apps/skills/create-mcp-app/SKILL.md) — scaffolds a new MCP App with an interactive UI
- [**migrate-oai-app**](https://github.com/modelcontextprotocol/ext-apps/blob/main/plugins/mcp-apps/skills/migrate-oai-app/SKILL.md) — migrates an existing OpenAI App to the MCP Apps SDK
- [**add-app-to-server**](https://github.com/modelcontextprotocol/ext-apps/blob/main/plugins/mcp-apps/skills/add-app-to-server/SKILL.md) — adds interactive UI to an existing MCP server's tools
- [**convert-web-app**](https://github.com/modelcontextprotocol/ext-apps/blob/main/plugins/mcp-apps/skills/convert-web-app/SKILL.md) — converts an existing web application into an MCP App
-
-## Install the Skills
-
-Choose one of the following installation methods based on your agent:
-
-### Option 1: Claude Code Plugin
-
-Install via Claude Code:
-
-```
-/plugin marketplace add modelcontextprotocol/ext-apps
-/plugin install mcp-apps@modelcontextprotocol-ext-apps
-```
-
-### Option 2: Vercel Skills CLI
-
-Use the [Vercel Skills CLI](https://skills.sh/) to install skills across different AI coding agents:
-
-```bash
-npx skills add modelcontextprotocol/ext-apps
-```
-
-### Option 3: Manual Installation
-
-Clone the repository:
-
-```bash
-git clone https://github.com/modelcontextprotocol/ext-apps.git
-```
-
-Then copy the skills from `plugins/mcp-apps/skills/` to your agent's skills directory. See your agent's documentation for the correct location:
-
- [Claude Code](https://docs.anthropic.com/en/docs/claude-code/skills)
- [VS Code](https://code.visualstudio.com/docs/copilot/customization/agent-skills) / [GitHub Copilot](https://docs.github.com/en/copilot/concepts/agents/about-agent-skills)
- [Codex](https://developers.openai.com/codex/skills/)
- [Gemini CLI](https://geminicli.com/docs/cli/skills/)
- [Cline](https://docs.cline.bot/features/skills#skills)
- [Goose](https://block.github.io/goose/docs/guides/context-engineering/using-skills/)
-
-## Verify Installation
-
-Ask your agent "What skills do you have?" — you should see `create-mcp-app`, `migrate-oai-app`, `add-app-to-server`, and `convert-web-app` among the available skills.
-
-## Invoke a Skill
-
-Try invoking the skills by asking your agent:
-
- "Create an MCP App" — scaffolds a new MCP App with an interactive UI
- "Migrate from OpenAI Apps SDK" — converts an existing OpenAI App to use the MCP Apps SDK
- "Add UI to my MCP server" — adds interactive UI to an existing MCP server's tools
- "Convert my web app to an MCP App" — converts an existing web application into an MCP App
-
-The agent will guide you through the process, asking clarifying questions as needed.
-
-## Test Your App
-
-After creating or migrating your MCP App, see the [Testing MCP Apps](./testing-mcp-apps.md) guide to run and debug it locally.
--- a/Show more
+++ b/Show more