jbvc/javascript-pro
Master modern JavaScript with ES6+, async patterns, and Node.js APIs. Handles promises, event loops, and browser/Node compatibility. Use PROACTIVELY for JavaScript optimization, async debugging, or complex JS patterns.
55
55%
Does it follow best practices?
Impact
Pending
No eval scenarios have been run
Passed
No known issues
Quality
Discovery
67%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 covers the JavaScript domain with reasonable breadth and includes an explicit 'Use when' clause, which is good for completeness. However, it leans on somewhat vague terms like 'complex JS patterns' and 'JavaScript optimization' rather than listing concrete actions. The trigger terms could be expanded to include more natural user language variations.
Suggestions
Replace vague phrases like 'complex JS patterns' and 'JavaScript optimization' with concrete actions such as 'refactor callbacks to async/await', 'resolve promise chains', 'debug event loop blocking'.
Expand trigger terms to include common user language like 'callback hell', 'await', 'fetch API', '.js files', 'npm', 'runtime error', 'TypeError' to improve matching coverage.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Names the domain (JavaScript/ES6+/Node.js) and mentions some specific concepts like promises, event loops, and async patterns, but 'JavaScript optimization' and 'complex JS patterns' are vague. It doesn't list concrete actions like 'refactor callback chains to async/await' or 'debug promise rejection handling'. | 2 / 3 |
Completeness | Clearly answers both 'what' (ES6+, async patterns, Node.js APIs, promises, event loops, browser/Node compatibility) and 'when' with an explicit trigger clause ('Use PROACTIVELY for JavaScript optimization, async debugging, or complex JS patterns'). | 3 / 3 |
Trigger Term Quality | Includes relevant keywords like 'JavaScript', 'ES6+', 'async', 'Node.js', 'promises', 'event loops', but misses common user terms like 'callback', 'await', 'fetch', '.js files', 'npm', 'TypeScript interop', or 'runtime errors'. Coverage is partial. | 2 / 3 |
Distinctiveness Conflict Risk | While it focuses on JavaScript specifically, terms like 'optimization' and 'complex patterns' are broad enough to overlap with general coding skills. The async/Node.js focus helps somewhat, but 'JavaScript' is a very wide domain that could conflict with frontend, React, or general web development skills. | 2 / 3 |
Total | 9 / 12 Passed |
Implementation
22%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This skill reads as a high-level overview of JavaScript best practices that Claude already knows, offering no concrete code examples, specific patterns, or executable guidance. The workflow is too abstract to be actionable, and the content doesn't add meaningful knowledge beyond what a competent JS developer (or Claude) would already possess. To be useful, it needs specific code snippets, concrete debugging techniques, and detailed patterns for the complex scenarios it claims to address.
Suggestions
Add concrete, executable code examples for key patterns (e.g., proper async/await error handling, event loop microtask ordering, race condition prevention with AbortController).
Replace vague workflow steps like 'Validate performance and compatibility' with specific commands or tools (e.g., 'Run `node --prof` for CPU profiling, use `lighthouse` for browser perf').
Remove generic advice Claude already knows (e.g., 'prefer async/await over promise chains') and replace with non-obvious patterns, gotchas, or project-specific conventions.
Add references to separate files for detailed topics like async debugging patterns, Node.js API recipes, or browser compatibility strategies to enable progressive disclosure.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is relatively brief but consists mostly of generic guidance that Claude already knows (e.g., 'prefer async/await over promise chains', 'handle errors at appropriate boundaries'). Nearly every bullet point restates common JS best practices without adding novel or project-specific information. | 2 / 3 |
Actionability | There are no concrete code examples, executable commands, or specific patterns. Every instruction is abstract and descriptive ('choose async patterns', 'implement with robust error handling') rather than providing copy-paste ready guidance or concrete techniques. | 1 / 3 |
Workflow Clarity | The four numbered steps in 'Instructions' are extremely vague ('Identify runtime targets', 'Validate performance') with no specific commands, validation checkpoints, or feedback loops. The workflow provides no actionable sequence Claude could follow. | 1 / 3 |
Progressive Disclosure | The content is organized into clear sections with headers, which provides some structure. However, there are no references to external files for deeper topics (async patterns, Node.js APIs, etc.) that would benefit from detailed examples, and the sections themselves are shallow lists. | 2 / 3 |
Total | 6 / 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 |
|---|---|---|
metadata_version | 'metadata.version' is missing | Warning |
Total | 10 / 11 Passed | |
Reviewed
Table of Contents