api-testing-observability-api-mock
You are an API mocking expert specializing in realistic mock services for development, testing, and demos. Design mocks that simulate real API behavior and enable parallel development.
42
28%
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 ./.agent/skills/api-testing-observability-api-mock/SKILL.mdQuality
Discovery
22%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 uses second person voice ('You are') which violates the style guidelines, and reads more like a persona prompt than a skill description. It lacks concrete actions, explicit trigger conditions, and natural user keywords. The description would struggle to differentiate itself in a large skill library.
Suggestions
Rewrite in third person voice describing capabilities (e.g., 'Creates mock API endpoints, generates realistic response data, simulates error conditions and latency')
Add an explicit 'Use when...' clause with trigger terms like 'mock API', 'stub endpoint', 'fake server', 'API testing', 'parallel development'
List specific concrete actions such as 'define mock endpoints', 'configure response schemas', 'simulate authentication flows', 'generate sample payloads'
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Uses vague language like 'realistic mock services' and 'simulate real API behavior' without listing concrete actions. No specific capabilities like 'create mock endpoints', 'generate response schemas', or 'configure latency simulation' are mentioned. | 1 / 3 |
Completeness | Describes a general 'what' (API mocking) but lacks any explicit 'when' clause or trigger guidance. No 'Use when...' statement is present, and the use cases mentioned (development, testing, demos) are too vague to serve as clear triggers. | 1 / 3 |
Trigger Term Quality | Contains some relevant keywords ('API mocking', 'mock services', 'development', 'testing', 'demos') but misses common variations users might say like 'stub', 'fake API', 'mock server', 'API simulation', or specific tools/formats. | 2 / 3 |
Distinctiveness Conflict Risk | The 'API mocking' focus provides some distinction, but terms like 'development' and 'testing' are generic and could overlap with many other skills. Could conflict with general API development or testing skills. | 2 / 3 |
Total | 6 / 12 Passed |
Implementation
35%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This skill provides a reasonable structure and appropriate scoping (when to use/not use) but fails to deliver actionable, concrete guidance. The main content is abstract instructions that defer all implementation details to a sub-skill, making the primary skill file nearly useless on its own. The skill would benefit significantly from inline code examples and a quick-start section.
Suggestions
Add a concrete Quick Start section with an executable mock server example (e.g., using msw, json-server, or Express) directly in the main skill file
Replace abstract instructions like 'Define mock routes' with specific code patterns or templates showing how to define routes with different response scenarios
Include at least one complete example showing mock setup, a sample request, and expected response
Add validation steps to the workflow, such as 'Verify mock returns expected status codes' or 'Test error scenarios before integration'
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is reasonably efficient but includes some unnecessary framing ('You are an API mocking expert...') and context that Claude already knows. The 'Context' section restates what's already clear from the title and description. | 2 / 3 |
Actionability | The instructions are vague and abstract ('Clarify the API contract', 'Define mock routes') without any concrete code, commands, or executable examples. No copy-paste ready content is provided in the main skill file. | 1 / 3 |
Workflow Clarity | Steps are listed in the Instructions section but lack explicit validation checkpoints or feedback loops. The sequence is present but there's no guidance on verifying mock correctness or handling errors. | 2 / 3 |
Progressive Disclosure | References to external resources exist (implementation-playbook.md) but the main skill lacks any quick-start content. The skill is essentially a pointer to another file without providing immediate value or examples upfront. | 2 / 3 |
Total | 7 / 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 |
|---|---|---|
frontmatter_unknown_keys | Unknown frontmatter key(s) found; consider removing or moving to metadata | Warning |
Total | 10 / 11 Passed | |
- Repository
- Dokhacgiakhoa/antigravity-ide
- Commit
332e58b
- Reviewed
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