frontend-design
Defines a named visual aesthetic, selects typography pairings, builds CSS token systems, and adds entrance animations for high-design-quality pages. Use when the user asks to design a landing page, style a marketing site, create a distinctive UI theme, pick fonts, or add CSS animations — specifically when visual polish and brand identity matter rather than generic component scaffolding.
77
96%
Does it follow best practices?
Impact
—
No eval scenarios have been run
Passed
No known issues
Quality
Discovery
100%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is an excellent skill description that hits all the marks. It lists specific concrete capabilities, provides rich natural trigger terms covering multiple user phrasings, explicitly states both what and when, and clearly differentiates itself from adjacent skills with the 'rather than generic component scaffolding' boundary clause.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: 'Defines a named visual aesthetic', 'selects typography pairings', 'builds CSS token systems', and 'adds entrance animations'. These are precise, actionable capabilities. | 3 / 3 |
Completeness | Clearly answers both what (defines aesthetics, selects typography, builds CSS tokens, adds animations) and when ('Use when the user asks to design a landing page, style a marketing site...') with explicit trigger guidance and a clarifying boundary ('rather than generic component scaffolding'). | 3 / 3 |
Trigger Term Quality | Includes strong natural keywords users would say: 'landing page', 'marketing site', 'UI theme', 'pick fonts', 'CSS animations', 'visual polish', 'brand identity'. Good coverage of varied user phrasings. | 3 / 3 |
Distinctiveness Conflict Risk | The description carves out a clear niche around high-design-quality visual styling and brand identity, and explicitly distinguishes itself from generic component scaffolding. The specific focus on typography pairings, CSS token systems, and entrance animations makes it unlikely to conflict with general UI or component-building skills. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
92%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a well-crafted skill with a clear, concise workflow, executable CSS examples, and specific validation criteria. Its main weakness is that it references supporting files (COMPONENTS.md, REFERENCE.md) that don't exist in the bundle, and it includes an ambiguous reference to a 'project-consistency' skill. The core content is strong and actionable.
Suggestions
Provide the referenced COMPONENTS.md and REFERENCE.md files, or inline the most critical content from them if the bundle cannot include them.
Clarify or remove the 'project-consistency' skill reference—provide a concrete path or explain how to load it.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is lean and efficient. It avoids explaining what CSS custom properties are or how animations work—it assumes Claude knows these things. Every section serves a purpose, and the quick-start example is compact yet complete. | 3 / 3 |
Actionability | The quick-start example is fully executable CSS that can be copy-pasted. The workflow steps are concrete (e.g., 'define :root CSS custom properties'), and the quality checklist provides specific, measurable criteria (e.g., '≥4.5:1 contrast'). | 3 / 3 |
Workflow Clarity | The 5-step workflow is clearly sequenced with a logical progression from naming the aesthetic through validation. Step 5 explicitly requires running the Quality Checklist and fixing failures before marking done, providing a validation checkpoint and feedback loop. | 3 / 3 |
Progressive Disclosure | References to COMPONENTS.md and REFERENCE.md are well-signaled and one level deep, which is good. However, no bundle files were provided, meaning these references point to non-existent files, undermining the progressive disclosure structure. The vague reference to a 'project-consistency' skill without a clear path also weakens navigation. | 2 / 3 |
Total | 11 / 12 Passed |
Validation
100%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 11 / 11 Passed
Validation for skill structure
No warnings or errors.
- Repository
- monkilabs/opencastle
- Commit
cc13aaf
- Reviewed
Table of Contents
Is this your skill?
If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.