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.
49
53%
Does it follow best practices?
Impact
—
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 description that clearly lists specific ES6+ features and provides explicit trigger guidance via a 'Use when...' clause. The main weakness is potential overlap with other JavaScript-related skills due to the broad scope of features and use cases covered. The description could benefit from slightly narrower scoping to reduce conflict risk with general JavaScript or code refactoring skills.
| 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' (use when refactoring legacy code, implementing modern patterns, or optimizing JavaScript applications). The 'Use when...' clause is explicit. | 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 user might 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 term 'Master' is also somewhat vague as a verb. However, the ES6+ focus does provide some distinctiveness. | 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 reads as a comprehensive JavaScript ES6+ tutorial/reference rather than an actionable skill for Claude. It explains concepts Claude already knows extensively (arrow functions, destructuring, promises, array methods), consuming a large token budget without adding novel value. It lacks any workflow structure for the stated use cases (refactoring, migration, optimization) and has no progressive disclosure or external references.
Suggestions
Reduce content by 80%+ — remove explanations of standard JS features Claude already knows and focus only on project-specific conventions, preferred patterns, or non-obvious decisions (e.g., 'always use X pattern over Y in this codebase').
Add a concrete workflow for the primary use case (e.g., refactoring legacy code): identify pattern → apply transformation → validate → test, with explicit validation steps.
Split detailed reference material into separate bundle files (e.g., ASYNC_PATTERNS.md, FUNCTIONAL_PATTERNS.md) and keep SKILL.md as a concise overview with links.
Replace generic textbook examples with task-oriented examples showing before/after transformations that Claude would actually perform (e.g., 'Given callback-based code, transform to async/await following this pattern').
| 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). Most content is a JavaScript tutorial rather than novel, actionable guidance. The 'When to Use This Skill' section, 'Best Practices' list, 'Common Pitfalls', and 'Resources' sections all add tokens without providing information Claude doesn't already have. | 1 / 3 |
Actionability | The code examples are executable and syntactically correct, which is good. However, they are generic textbook examples rather than task-specific guidance. There's no concrete workflow for 'refactoring legacy code' or 'implementing modern patterns' — it's a reference document, not actionable instructions for specific tasks Claude would perform. | 2 / 3 |
Workflow Clarity | There is no workflow or sequenced process. The skill is structured as a reference/tutorial with no steps for accomplishing a task, no validation checkpoints, and no decision points. For a skill about refactoring or migrating code, there should be a clear process (e.g., identify legacy patterns → apply transformation → validate output). | 1 / 3 |
Progressive Disclosure | Monolithic wall of text with no references to external files and no bundle files. All content is inline in a single massive document. Content like the full API examples for array methods, generators, and class features could be split into separate reference files, with the main skill providing a concise overview. | 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
bbc5ade
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