feat: add example gallery with auto-generated screenshots #253
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…amples - Add generate-grid-screenshots.spec.ts Playwright test to capture screenshots - Add npm run generate:screenshots command (Docker-based for Santa compatibility) - Add sharp dependency for image resizing with centered-fill mode - Generate grid-cell.png for 14 example servers (only React for basic-server-* series) The screenshots are 300x300 PNG images cropped with centered fill mode, suitable for use in a grid layout showcasing the examples.
Add a 3-column visual grid showcasing 14 example MCP Apps with: - Thumbnail screenshots (300x300 grid-cell.png) - Clickable links to example directories - Hover tooltips with brief descriptions Organized by visual impact: 3D/WebGL examples first, then visualizations, charts, monitoring, and starter templates.
@modelcontextprotocol/ext-apps
@modelcontextprotocol/server-basic-react
@modelcontextprotocol/server-basic-vanillajs
@modelcontextprotocol/server-budget-allocator
@modelcontextprotocol/server-cohort-heatmap
@modelcontextprotocol/server-customer-segmentation
@modelcontextprotocol/server-scenario-modeler
@modelcontextprotocol/server-system-monitor
@modelcontextprotocol/server-threejs
@modelcontextprotocol/server-wiki-explorer
commit: |
Change from fit: 'cover' (crops) to fit: 'contain' (letterbox) so the full app content is visible without cropping.
- Constrain viewport to 500px width for consistent rendering - Wait 5 seconds for full app load (tiles, animations, data) - Screenshot just the inner iframe (no extra whitespace) - Save both screenshot.png (full-size) and grid-cell.png (300x300 thumbnail) - Use contain mode to preserve aspect ratio
No letterboxing - crops to fill 300x300, aligned to top so headers and important content are always visible.
- Remove integration-server from gallery (it's for E2E testing only) - Add 30s extra wait for Map and Video servers to load fully - Improve Three.js default scene: isometric rotation + better lighting - Update README: Starter Templates row with links to all framework variants (React, Vue, Svelte, Preact, Solid, Vanilla JS) - Regenerate all screenshots with updated settings
- Fix uneven column widths by using minimal separator - Move Starter Templates to separate 2-cell table with description - Add screenshot.png to top of each example README (13 examples) - Shorten tooltips for cleaner table
- Merged ochafik/post-fixes which reverts sandbox from srcdoc to document.write
(CesiumJS doesn't work with srcdoc iframes)
- Fixed map-server name in screenshot test ('Map Server' not 'CesiumJS Map Server')
- Simplified screenshot generation script (removed complex debugging code)
- Increased map-server wait time to 45s for reliable tile loading
- Regenerated all 13 screenshots
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Summary
Add a visual gallery to the README showcasing all example MCP Apps, with automated screenshot generation.
Changes
Screenshot generation script (
tests/e2e/generate-grid-screenshots.spec.ts)npm run generate:screenshots(Docker-based)README gallery
14 grid-cell.png files in example directories
basic-server-reactfrom the basic-server-* series (others are nearly identical)-serverexamples includedScreenshot
The gallery appears at the top of the README, making it easy to browse available examples visually.
Usage
To regenerate screenshots after making changes to examples: