typescript-language
Apply modern TypeScript standards for type safety and maintainability. Use when working with types, interfaces, generics, enums, unions, or tsconfig settings.
64
77%
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 ./.github/skills/typescript/typescript-language/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.
This is a solid description with excellent trigger term coverage and clear completeness via the explicit 'Use when...' clause. Its main weakness is that the 'what' portion is somewhat abstract ('apply modern TypeScript standards') rather than listing concrete actions Claude would perform, and it could potentially overlap with general coding standards skills.
Suggestions
Add specific concrete actions to the 'what' portion, e.g., 'Enforces strict typing, converts any/unknown types, configures tsconfig compiler options, designs type-safe interfaces and generics'
Consider adding distinguishing context such as 'for TypeScript codebases' or mentioning file extensions like '.ts', '.tsx' to reduce overlap with general coding skills
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | The description names the domain (TypeScript standards) and mentions some areas (type safety, maintainability), but doesn't list specific concrete actions like 'convert any types to strict types', 'configure strict mode in tsconfig', or 'refactor enums to const enums'. The actions are implied rather than explicitly enumerated. | 2 / 3 |
Completeness | Clearly answers both 'what' (apply modern TypeScript standards for type safety and maintainability) and 'when' (Use when working with types, interfaces, generics, enums, unions, or tsconfig settings), with an explicit 'Use when...' clause containing specific triggers. | 3 / 3 |
Trigger Term Quality | Includes strong natural keywords users would say: 'TypeScript', 'types', 'interfaces', 'generics', 'enums', 'unions', 'tsconfig'. These cover the most common terms a user would mention when needing TypeScript guidance. | 3 / 3 |
Distinctiveness Conflict Risk | While TypeScript-specific terms help distinguish it, 'types' and 'interfaces' are broad enough to potentially overlap with other programming language skills or general coding standards skills. The focus on 'modern standards' could also conflict with a general code quality or linting skill. | 2 / 3 |
Total | 10 / 12 Passed |
Implementation
72%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a well-structured, concise TypeScript patterns skill that efficiently communicates standards and anti-patterns without over-explaining. Its main weakness is that many guidelines are stated as terse bullets without executable code examples to demonstrate the correct pattern, reducing actionability. The verification step referencing a specific MCP tool is a strong point, but the overall document reads more as a reference card than an actionable workflow.
Suggestions
Add executable code examples for key patterns like type guards, generics with constraints, and the correct alternative to `any` (using `unknown` with narrowing) to improve actionability.
Consider adding a brief workflow sequence for common scenarios (e.g., 'Adding a new type to a shared module: 1. Define type → 2. Update consumers → 3. Run getDiagnostics → 4. Fix errors → 5. Finalize') to improve workflow clarity.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | Extremely lean and efficient. Every bullet point adds value without explaining concepts Claude already knows. No unnecessary preamble or definitions—just patterns, anti-patterns, and concrete guidance. | 3 / 3 |
Actionability | The code examples are executable and concrete, but most guidance is in terse bullet-point form without executable examples (e.g., type guards, utility types, generics). The anti-patterns section says what NOT to do but doesn't always show the correct alternative with code. The verification step references a specific MCP tool which is actionable. | 2 / 3 |
Workflow Clarity | The verification step at the end provides a validation checkpoint for type changes, which is good. However, there's no clear sequenced workflow—it's more of a reference card than a step-by-step process. For a skill that involves modifying types across module boundaries, a clearer workflow with feedback loops would strengthen this. | 2 / 3 |
Progressive Disclosure | The skill provides a concise overview with well-signaled one-level-deep references to TESTING.md and REFERENCE.md for advanced content. Content is appropriately split between the main file and referenced materials, though bundle files weren't provided to verify the references exist. | 3 / 3 |
Total | 10 / 12 Passed |
Validation
81%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 9 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
metadata_version | 'metadata.version' is missing | Warning |
metadata_field | 'metadata' should map string keys to string values | Warning |
Total | 9 / 11 Passed | |
- Repository
- HoangNguyen0403/agent-skills-standard
- Commit
556618c
- Reviewed
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