jbvc/modern-javascript-patterns
Master ES6+ features including async/await, destructuring, spread operators, arrow functions, promises, modules, iterators, generators, and functional programming patterns for writing clean, efficient JavaScript code. Use when refactoring legacy code, implementing modern patterns, or optimizing JavaScript applications.
65
65%
Does it follow best practices?
Impact
Pending
No eval scenarios have been run
Passed
No known issues
Quality
Discovery
92%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 a strong description that clearly lists specific ES6+ features and provides explicit trigger guidance with a 'Use when' clause. The main weakness is that its scope is broad enough to potentially conflict with other JavaScript-related skills, and the word 'Master' at the beginning reads slightly like marketing language rather than a functional description. Overall it performs well across most dimensions.
Suggestions
Narrow the scope or add boundary language to reduce overlap with general JavaScript skills, e.g., 'Does not cover basic JavaScript syntax or Node.js-specific APIs'.
Replace 'Master' with a more functional verb like 'Applies' or 'Implements' to maintain third-person descriptive voice and reduce fluff.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions and features: async/await, destructuring, spread operators, arrow functions, promises, modules, iterators, generators, and functional programming patterns. Also mentions specific use cases like refactoring legacy code and optimizing JavaScript applications. | 3 / 3 |
Completeness | Clearly answers both 'what' (master ES6+ features including a detailed list) and 'when' (explicitly states 'Use when refactoring legacy code, implementing modern patterns, or optimizing JavaScript applications'). | 3 / 3 |
Trigger Term Quality | Includes many natural keywords users would say: 'ES6', 'async/await', 'destructuring', 'spread operators', 'arrow functions', 'promises', 'modules', 'generators', 'functional programming', 'refactoring legacy code', 'modern patterns', 'JavaScript'. These cover a wide range of terms a developer would naturally use. | 3 / 3 |
Distinctiveness Conflict Risk | While it focuses on ES6+ specifically, the broad scope covering 'JavaScript code', 'optimizing JavaScript applications', and 'functional programming patterns' could overlap with general JavaScript skills, Node.js skills, or broader code refactoring skills. The term 'Master' at the start also adds vagueness to the boundary. | 2 / 3 |
Total | 11 / 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 is essentially a hollow wrapper that defers all meaningful content to an external playbook file. The SKILL.md body contains no concrete JavaScript examples, no executable code, and no specific guidance—just generic meta-instructions like 'apply relevant best practices.' For a skill about modern JavaScript patterns, the complete absence of any actual JavaScript code or specific patterns is a critical weakness.
Suggestions
Add at least 2-3 concrete, executable JavaScript code examples directly in SKILL.md showing key patterns (e.g., async/await conversion, destructuring, spread operators) as a quick-start section.
Replace the vague instructions ('Apply relevant best practices', 'Provide actionable steps') with specific, sequenced guidance for common tasks like refactoring callbacks to async/await.
Add a brief summary of what's in the implementation playbook so readers know what to expect before opening it (e.g., 'Covers: Promise chaining patterns, generator examples, module migration steps').
Remove the 'Do not use this skill when' section as it adds no value—stating 'don't use when unrelated' is trivially obvious.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is relatively short but includes unnecessary filler like 'Comprehensive guide for mastering modern JavaScript (ES6+) features...' and vague bullet lists that don't add actionable value. The 'Do not use this skill when' section is trivially obvious. | 2 / 3 |
Actionability | There is no concrete code, no executable examples, no specific commands or patterns. The instructions are entirely vague ('Apply relevant best practices', 'Provide actionable steps') with zero JavaScript content. Everything is deferred to an external file. | 1 / 3 |
Workflow Clarity | The instructions are four generic bullet points with no clear sequence, no validation checkpoints, and no specific workflow for any of the listed use cases. 'Clarify goals, constraints, and required inputs' is not a meaningful step. | 1 / 3 |
Progressive Disclosure | There is a reference to an external resource file (resources/implementation-playbook.md), which is good structure. However, the SKILL.md itself contains almost no substantive content—it's essentially an empty shell pointing elsewhere, with no quick-start or overview content to orient the reader. | 2 / 3 |
Total | 6 / 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.
Reviewed
Table of Contents