tsdown
tsdown fast TypeScript library bundler powered by Rolldown and Oxc. Use when bundling TypeScript libraries, configuring entry points, or generating .d.ts declaration files.
85
Does it follow best practices?
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Discovery
100%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 an excellent skill description that follows best practices. It uses third person voice, provides specific capabilities, includes a clear 'Use when...' clause with natural trigger terms, and establishes a distinct niche through tool-specific terminology. The description is concise yet comprehensive.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: 'bundling TypeScript libraries', 'configuring entry points', and 'generating .d.ts declaration files'. These are clear, actionable capabilities. | 3 / 3 |
Completeness | Clearly answers both what ('fast TypeScript library bundler powered by Rolldown and Oxc') and when ('Use when bundling TypeScript libraries, configuring entry points, or generating .d.ts declaration files') with explicit trigger guidance. | 3 / 3 |
Trigger Term Quality | Includes natural keywords users would say: 'TypeScript', 'bundler', 'bundling', 'entry points', '.d.ts', 'declaration files'. Also mentions specific tools 'Rolldown' and 'Oxc' that users familiar with the ecosystem would reference. | 3 / 3 |
Distinctiveness Conflict Risk | Highly distinctive with specific tool name 'tsdown' and underlying technologies 'Rolldown' and 'Oxc'. The focus on TypeScript library bundling with declaration files creates a clear niche unlikely to conflict with general bundlers or other TypeScript tools. | 3 / 3 |
Total | 12 / 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 skill excels at organization and progressive disclosure, serving as an effective index to detailed reference materials. However, it lacks a quick-start example or minimal executable code snippet that would make it immediately actionable without consulting reference files. The user preferences are valuable but would benefit from a concrete example showing them in practice.
Suggestions
Add a 'Quick Start' section with a minimal executable tsdown.config.ts example incorporating Anthony's preferences (pure-ESM, dts, exports)
Include a basic CLI command example like `npx tsdown src/index.ts --format esm --dts` to make the skill immediately actionable
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is lean and efficient - a brief intro paragraph followed by well-organized reference tables. No unnecessary explanations of what TypeScript or bundlers are; assumes Claude's competence. | 3 / 3 |
Actionability | While the skill provides clear organization and user preferences, it lacks any executable code examples or concrete commands in the main file. All actionable content is deferred to reference files. | 2 / 3 |
Workflow Clarity | The skill organizes topics logically but provides no workflow sequence for common tasks like setting up a project or building. The preferences section hints at a workflow but doesn't provide explicit steps. | 2 / 3 |
Progressive Disclosure | Excellent structure with a clear overview and well-organized one-level-deep references. Topics are logically grouped (Core, Build Options, Features, Advanced, Recipes) with clear navigation via markdown tables. | 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 — 13 / 16 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
license_field | 'license' field is missing | Warning |
body_examples | No examples detected (no code fences and no 'Example' wording) | Warning |
body_steps | No step-by-step structure detected (no ordered list); consider adding a simple workflow | Warning |
Total | 13 / 16 Passed | |
- Reviewed
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