A valid test skill with proper formatting. This skill should pass all validations and serves as a reference for the expected format.
28
Quality
11%
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/fixtures/valid-skill/SKILL.mdQuality
Discovery
0%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 description is a placeholder or meta-description about being a test skill rather than an actual functional skill description. It provides no information about what the skill does, when to use it, or any trigger terms that would help Claude select it appropriately. It fails all evaluation criteria.
Suggestions
Replace the meta-description with concrete actions the skill performs (e.g., 'Validates YAML frontmatter, checks markdown syntax, verifies skill file structure').
Add an explicit 'Use when...' clause with natural trigger terms users would say (e.g., 'Use when validating skill files, checking skill format, or verifying markdown structure').
Define a clear domain or niche to distinguish this skill from others (e.g., focus on 'skill file validation' or 'markdown linting' rather than generic 'formatting').
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | The description uses vague, abstract language ('valid test skill', 'proper formatting', 'pass all validations') without describing any concrete actions or capabilities the skill performs. | 1 / 3 |
Completeness | Fails to answer both 'what does this do' and 'when should Claude use it'. The description is self-referential about being a test/reference rather than describing actual functionality or use cases. | 1 / 3 |
Trigger Term Quality | Contains no natural keywords a user would say when needing this skill. Terms like 'validations', 'reference', and 'expected format' are meta-descriptive rather than task-oriented triggers. | 1 / 3 |
Distinctiveness Conflict Risk | Extremely generic and self-referential. The description provides no distinguishing characteristics that would help Claude select this skill over any other skill in a collection. | 1 / 3 |
Total | 4 / 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 a placeholder/stub that lacks substantive content. While it demonstrates proper markdown structure and section organization, it provides no actionable guidance, concrete examples, or executable instructions. It appears to be a test fixture rather than a functional skill.
Suggestions
Add concrete, executable examples or code snippets that demonstrate the skill's purpose
Replace vague descriptions like 'This skill is used for testing validation' with specific instructions Claude should follow
Define actual rules or guidelines in the Quick Reference section instead of placeholder 'example-rule' entries
If this is meant to test validation, include actual validation steps or criteria that Claude should apply
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is brief but includes some filler phrases like 'A simple valid skill for testing purposes' and 'This skill is used for testing validation' that don't add actionable value. Could be tighter. | 2 / 3 |
Actionability | The skill provides no concrete, executable guidance. It describes what it is ('for testing') rather than instructing Claude how to do anything. No code, commands, or specific examples are provided. | 1 / 3 |
Workflow Clarity | There is no workflow or process defined. The 'How to Use' section simply states the skill is for testing without any steps, sequence, or validation checkpoints. | 1 / 3 |
Progressive Disclosure | The content has some structure with clear section headers (When to Apply, Quick Reference, How to Use), but the sections are essentially empty of meaningful content and there are no references to additional resources. | 2 / 3 |
Total | 6 / 12 Passed |
Validation
68%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 / 16 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
description_trigger_hint | Description may be missing an explicit 'when to use' trigger hint (e.g., 'Use when...') | Warning |
metadata_version | 'metadata' field is not a dictionary | Warning |
license_field | 'license' field is missing | Warning |
body_output_format | No obvious output/return/format terms detected; consider specifying expected outputs | Warning |
body_steps | No step-by-step structure detected (no ordered list); consider adding a simple workflow | Warning |
Total | 11 / 16 Passed | |
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Table of Contents
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