sketch
# Sketch - Collaborative SVG Canvas
What this skill does
# Sketch - Collaborative SVG Canvas ## Description Opens a Fabric.js-based SVG editor in the browser for collaborative visual prototyping. Claude can write and read SVG through MCP tools while the user edits interactively. Changes sync in real-time via WebSocket. ## Tools Available (via sketch-mcp-server) - `sketch_open_canvas` - Open a named canvas (creates if new), launches browser editor - `sketch_get_svg` - Read current SVG from a canvas - `sketch_set_svg` - Replace entire canvas with new SVG - `sketch_add_element` - Add SVG elements without clearing existing content - `sketch_add_textbox` - Add a fixed-width text area (Textbox) with word wrapping - `sketch_lock_objects` - Lock all current objects (non-selectable, non-movable) - `sketch_unlock_objects` - Unlock all objects - `sketch_save_template` - Save canvas as reusable JSON template (preserves Textbox widths + lock state) - `sketch_load_template` - Load a saved JSON template into a canvas - `sketch_list_templates` - List all saved templates - `sketch_clear_canvas` - Clear canvas to blank state (use before streaming) - `sketch_focus_canvas` - Bring canvas window to foreground - `sketch_list_canvases` - List all active canvases - `sketch_close_canvas` - Close a canvas and its browser tab ## Usage Patterns ### Quick sketch 1. `sketch_open_canvas` with a name 2. `sketch_set_svg` or `sketch_add_element` to draw 3. User edits in browser 4. `sketch_get_svg` to see changes ### Streaming (real-time build-up) 1. `sketch_open_canvas` with a name 2. `sketch_focus_canvas` to bring window to front 3. `sketch_clear_canvas` to start fresh 4. Call `sketch_add_element` multiple times -- each fragment appears instantly 5. User watches the UI build up in real-time ### Multiple canvases Each canvas opens in its own browser tab. Use different names for different drawings. ### SVG tips - Use standard SVG elements: `<rect>`, `<circle>`, `<ellipse>`, `<line>`, `<path>`, `<text>`, `<polygon>`, `<polyline>` - Include `xmlns="http://www.w3.org/2000/svg"` on the root `<svg>` element - Set `width` and `height` on the root SVG (default: 1200x800) - Colors: use hex colors (`#ff0000`) -- avoid `rgba()` as Fabric.js SVG parser may not handle it - Text: `<text x="100" y="100" font-size="24">Hello</text>` - Images: `<image href="data:image/png;base64,..." width="200" height="200"/>` - Avoid `<defs>`, `<linearGradient>`, `<filter>` -- Fabric.js has limited support for these
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