Guide Claude on Vaadin 25 theming with both Aura and Lumo themes. This skill should be used when the user asks to "choose a theme", "set up Aura", "set up Lumo", "customize the theme", "change colors", "enable dark mode", "customize design tokens", "use theme variants", "use utility classes", "change the color scheme", or needs help with theme-specific CSS custom properties, component theme variants, or building a custom theme in Vaadin 25.
64
77%
Does it follow best practices?
Impact
—
No eval scenarios have been run
Advisory
Suggest reviewing before use
Optimize this skill with Tessl
npx tessl skill review --optimize ./skills/theming/SKILL.mdSecurity
1 medium severity finding. This skill can be installed but you should review these findings before use.
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Third-party content exposure detected (high risk: 0.80). The SKILL.md explicitly instructs the agent to call Vaadin MCP tools (search_vaadin_docs, get_component_styling, get_component_java_api) to look up the latest Vaadin documentation (public Vaadin docs / referenced GitHub pages) as part of its required workflow, so the agent will fetch and interpret open/public third‑party content that can influence actions.
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