This skill should be used when the user says "visual sketch", "arn visual sketch", "sketch directions", "explore visuals", "visual proposals", "try different looks", "design directions", "sketch the UI", "visual exploration", "compare styles", "show me options", "what could this look like", or wants to generate multiple visual direction proposals as real HTML/CSS running on the scaffolded project's dev server, iteratively selecting and refining until a final visual direction is chosen.
56
64%
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 ./plugins/arn-spark/skills/arn-spark-visual-sketch/SKILL.mdQuality
Discovery
82%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
The description excels at providing extensive trigger terms and clearly answering both 'what' and 'when', making it strong for skill selection. However, it is somewhat front-loaded with trigger phrases at the expense of describing specific concrete capabilities in more detail, and some of the broader trigger terms ('show me options', 'what could this look like') could cause overlap with other design-related skills.
Suggestions
Add more specific concrete actions beyond 'generate proposals' and 'refine' — e.g., 'creates 3-4 distinct visual directions with different color palettes, typography, and layout approaches as live HTML/CSS pages'.
Consider narrowing or qualifying the more generic trigger terms like 'show me options' and 'what could this look like' to reduce potential conflicts with other design or UI skills.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | The description mentions generating 'multiple visual direction proposals as real HTML/CSS running on the scaffolded project's dev server' and 'iteratively selecting and refining until a final visual direction is chosen,' which names the domain and some actions but doesn't list multiple distinct concrete actions comprehensively (e.g., what specific design artifacts are created, how many options, what refinement entails). | 2 / 3 |
Completeness | The description explicitly answers both 'what' (generate multiple visual direction proposals as real HTML/CSS on the dev server, iteratively refine until a final direction is chosen) and 'when' (with a comprehensive 'Use when' clause listing many trigger phrases and the general condition of wanting visual direction proposals). | 3 / 3 |
Trigger Term Quality | The description includes an extensive list of natural trigger phrases users would actually say: 'visual sketch', 'sketch directions', 'explore visuals', 'try different looks', 'design directions', 'sketch the UI', 'compare styles', 'show me options', 'what could this look like'. These cover a wide range of natural language variations. | 3 / 3 |
Distinctiveness Conflict Risk | While the trigger terms are specific to visual exploration/sketching, terms like 'show me options', 'what could this look like', and 'design directions' could overlap with other UI/design skills. The mention of HTML/CSS on a dev server helps narrow it, but phrases like 'sketch the UI' could conflict with wireframing or prototyping skills. | 2 / 3 |
Total | 10 / 12 Passed |
Implementation
47%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a comprehensive orchestration skill with excellent workflow clarity and thorough error handling, but it suffers significantly from verbosity. The extensive scripted dialogue, duplicated error handling (both inline and in a dedicated section), and detailed presentation templates inflate the token cost substantially. The skill would benefit from aggressive trimming of conversational templates and consolidation of repeated information.
Suggestions
Reduce verbosity by removing scripted user-facing dialogue templates — Claude can generate appropriate conversational responses from brief instructions like 'Present context summary: framework, CSS, component lib, platform, target users, core experience' instead of full quoted paragraphs.
Consolidate error handling into a single reference table rather than duplicating it across the workflow steps AND a dedicated Error Handling section — currently many errors are described twice.
Move the Agent Invocation Guide table and the detailed expansion loop mechanics (Step 8) into a separate reference file to reduce the main skill's token footprint.
Remove the brief composition rules' extensive inline examples (e.g., 'warm grays and terracotta' not just 'warm colors') — Claude understands specificity without being shown contrast examples of vague vs. specific language.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is extremely verbose at ~300+ lines. It over-explains conversational flow with extensive template dialogue, repeats information across sections (e.g., error handling duplicated in workflow and error handling section), and includes lengthy tables and presentation templates that Claude could generate on its own. Many sections describe what to say to the user verbatim rather than providing concise instructions. | 1 / 3 |
Actionability | The skill provides concrete directory structures, specific file paths, and clear agent invocation patterns. However, it lacks executable code examples — the route structures are shown but actual file contents (gallery page, layout files) are deferred to external references. The workflow is detailed but relies heavily on external templates and references that aren't provided in the bundle, making it incomplete on its own. | 2 / 3 |
Workflow Clarity | The 10-step workflow is clearly sequenced with explicit validation checkpoints (build verification before proceeding, user confirmation gates at Steps 2/3/4, error handling per agent, manifest reading before gallery creation). The iterative loop in Step 8 has a clear decision table, and the error handling section covers edge cases with specific recovery actions including feedback loops for failed agents. | 3 / 3 |
Progressive Disclosure | The skill references external files well (aesthetic-philosophy.md, sketch-gallery-guide.md, visual-direction-template.md) with clear read directives, but the main SKILL.md itself is monolithic — it contains extensive inline content that could be split into references (e.g., the full agent invocation guide table, the detailed error handling section, the verbose conversation templates). Without bundle files provided, the referenced paths cannot be verified. | 2 / 3 |
Total | 8 / 12 Passed |
Validation
90%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 10 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
frontmatter_unknown_keys | Unknown frontmatter key(s) found; consider removing or moving to metadata | Warning |
Total | 10 / 11 Passed | |
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Table of Contents
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