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.
62
53%
Does it follow best practices?
Impact
Pending
No eval scenarios have been run
Passed
No known issues
Optimize this skill with Tessl
npx tessl skill review --optimize ./tests/ext_conformance/artifacts/agents-wshobson/javascript-typescript/skills/modern-javascript-patterns/SKILL.mdQuality
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 skill description that clearly enumerates specific ES6+ features and provides explicit trigger guidance with a 'Use when' clause. Its main weakness is the breadth of scope—covering so many JavaScript features could cause overlap with other JavaScript-related skills. The description uses proper third-person voice and avoids vague language.
| 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', 'JavaScript', 'refactoring legacy code', 'modern patterns'. 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', 'functional programming patterns', and 'optimizing JavaScript applications' could overlap with general JavaScript skills, Node.js skills, or code refactoring skills. The ES6+ focus provides some distinction but the boundaries are somewhat fuzzy. | 2 / 3 |
Total | 11 / 12 Passed |
Implementation
14%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 JavaScript ES6+ textbook chapter rather than an actionable skill for Claude. It explains concepts Claude already knows thoroughly (arrow functions, destructuring, promises, array methods), wastes significant token budget on basic syntax demonstrations, and lacks any workflow structure for the tasks it claims to support (refactoring, migration, optimization). The content would need to be dramatically reduced and restructured around specific actionable workflows.
Suggestions
Reduce content by 80%+ by removing explanations of features Claude already knows (arrow functions, destructuring, template literals, basic array methods) and focus only on project-specific conventions, non-obvious patterns, or decision frameworks.
Add concrete workflows for the claimed use cases—e.g., a step-by-step process for refactoring callback-based code to async/await, with validation steps to verify correctness.
Split content into a brief SKILL.md overview with references to separate files (e.g., ASYNC_PATTERNS.md, FUNCTIONAL_PATTERNS.md) for progressive disclosure.
Replace the generic 'Best Practices' and 'Common Pitfalls' lists with specific, actionable decision rules (e.g., 'When you see pattern X, refactor to pattern Y') rather than advice Claude already follows.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | Extremely verbose at ~600+ lines. Explains basic concepts Claude already knows (arrow functions, destructuring, template literals, array methods like map/filter/reduce). Re-implements built-in higher-order functions (custom forEach, map, filter) which adds no value. The 'Best Practices' and 'Common Pitfalls' sections are generic advice Claude already possesses. External resource links waste tokens. | 1 / 3 |
Actionability | Code examples are executable and syntactically correct, which is good. However, the skill reads more like a JavaScript textbook/reference than actionable guidance for specific tasks. It lacks concrete instructions for when/how to apply these patterns in a workflow—it's a catalog of syntax rather than task-oriented guidance. | 2 / 3 |
Workflow Clarity | There is no workflow or sequenced process. The skill is a flat reference document with no steps, no validation checkpoints, and no guidance on how to approach refactoring or migration tasks. The 'When to Use This Skill' section lists scenarios but provides no process for any of them. | 1 / 3 |
Progressive Disclosure | Monolithic wall of text with everything inline. No content is split into separate files or referenced externally for deeper dives. All topics—from basic arrow functions to generators to performance optimization—are dumped into a single massive document with no navigation strategy. | 1 / 3 |
Total | 5 / 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 |
|---|---|---|
skill_md_line_count | SKILL.md is long (928 lines); consider splitting into references/ and linking | Warning |
Total | 10 / 11 Passed | |
- Repository
- Dicklesworthstone/pi_agent_rust
- Commit
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- Reviewed
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