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add-shader-cursor-trail

Add a white, twinkling dotted trail that follows the mouse behind website content. The skill guides WebGPU rendering, which uses the graphics processor, with static backgrounds for unsupported devices and accessibility preferences.

OriginalShow the original description

Add the Shaders WebGPU mouse effect used for the Tidal Commons hero: a white twinkling halftone cursor trail driven by ChromaFlow, masked through a DotGrid, finished with chromatic ripples and film grain, and protected by static, touch, accessibility, SSR, and performance fallbacks. Use when a user asks for this shader mouse effect, a halftone cursor trail, an interactive WebGPU hero/contact background, or a reusable cursor-following shader layer in React, Next.js, Vue, Svelte, Solid, or plain web projects.

See how to install

Good for

  • Add a mouse-following trail to a hero section
  • Create an interactive contact section background
  • Keep a static background on touch devices
  • Reuse the effect across web projects

Files included (7)

  • SKILL.md3.0 KB
  • agents/openai.yaml251 B
  • assets/react/cursor-trail.css817 B
  • assets/react/CursorTrailGate.tsx2.9 KB
  • assets/react/CursorTrailShader.tsx1.8 KB
  • references/implementation.md5.3 KB
  • scripts/verify-cursor-trail.mjs2.9 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Add Shader Cursor Trail

Implement the exact trail as progressive enhancement. Preserve the host section's semantic content, imagery, controls, and static first frame.

Workflow

  1. Inspect the framework, rendering mode, existing motion stack, layer order, reduced-motion rules, and package manager. Do not add another smooth-scroll engine or replace the section's content.
  2. Install shaders with the existing package manager. Import from the matching framework subpath: shaders/react, shaders/vue, shaders/svelte, or shaders/solid.
  3. Read references/implementation.md before implementation. Keep the six shader nodes, their order, both invisible drivers, and both ID linkages exact.
  4. For React or Next.js, copy and adapt the files in assets/react/. Keep the lightweight capability gate separate from the heavy shader module so ineligible visitors do not request the shader bundle.
  5. Place one full-bleed, aria-hidden="true" shader layer behind the section content. Keep links and controls above it. Do not set pointer-events: none on the canvas unless cursor tracking is verified to use global events.
  6. Gate loading on WebGPU, a fine hover pointer, normal motion/transparency preferences, document visibility, window focus, and section intersection. Unmount when the section leaves view so GPU work stops.
  7. Keep the original image or dark background as the complete fallback. Hide the layer for reduced motion, reduced transparency, coarse/no-hover pointers, and forced colors.
  8. Adapt only presentation variables such as opacity and blend mode. Do not change the graph to decorative noise, add WebGL/Three.js, or hotlink Shaders preview assets.

Validate

Run the project's lint, typecheck/tests, and production build. For React implementations, also run:

node /path/to/add-shader-cursor-trail/scripts/verify-cursor-trail.mjs \
  path/to/CursorTrailShader.tsx \
  path/to/CursorTrailGate.tsx \
  path/to/cursor-trail.css

Verify the static section with JavaScript unavailable, keyboard access to content above the layer, touch behavior, reduced motion, unsupported WebGPU, focus/visibility cleanup, and absence of runtime requests to previews.shaders.com or data.shaders.com.

Report the chosen blend mode, fallback, capability gates, production-build result, and any browser limitation. Do not claim WebGPU visual verification unless it was actually performed in a compatible browser.

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