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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.

63

1.19x
Quality

57%

Does it follow best practices?

Impact

86%

1.19x

Average score across 3 eval scenarios

SecuritybySnyk

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./plugins/AI-Agents-Safe-Coding-Skills-claude/skills/api-testing-observability-api-mock/SKILL.md

The canonical home for this skill is api-testing-observability-api-mock in rmyndharis/antigravity-skills

SKILL.md
Quality
Evals
Security

Quality

Content

50%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is a clean, well-sectioned instruction skill with sensible use/don't-use and safety boundaries, but it restates the frontmatter role redundantly, offers no concrete examples or tools, and points to a bundle file that is missing from the skill directory. It reads as a well-organized skeleton whose payload lives in a reference that was never shipped.

Suggestions

Create the referenced `references/implementation-playbook.md` (or fix the path) so the Instructions and Resources sections point at a file that actually exists in the bundle.

Add one concrete anchor example, such as a sample mock route/scenario definition or a command to start a common mock server (WireMock, Prism, nock), to lift actionability.

Delete the opening role paragraph and the "## Context" section, which duplicate the frontmatter description nearly verbatim.

DimensionReasoningScore

Conciseness

The body is mostly efficient with well-scoped sections, but the opening paragraph ("You are an API mocking expert... Design comprehensive mocking solutions...") and the "## Context" section restate the frontmatter role almost verbatim, adding unnecessary tokens that could be trimmed.

3 / 5

Actionability

Bullets like "Define mock routes, scenarios, and state transitions before generating responses" and "Provide deterministic fixtures with optional randomness toggles" are reasonably specific directives, but there is no concrete code, tool choice, or runnable command (e.g., no WireMock/Prism/nock example, no sample route definition), leaving guidance incomplete.

3 / 5

Workflow Clarity

The instruction bullets imply a sensible order (clarify contract → define routes/scenarios → fixtures → document), matching the "sequence present but checkpoints missing or implicit" anchor; no validation steps exist, though the skill is not destructive/batch so the hard cap does not apply.

3 / 5

Progressive Disclosure

Sections are well organized and the playbook reference is clearly signaled in both Instructions and Resources, but `resources/implementation-playbook.md` does not exist in the bundle (no references/, scripts/, assets/, or resources/ directories), and the nonstandard `resources/` path deviates from convention — so the disclosure structure is aspirational rather than functional.

3 / 5

Total

12

/

20

Passed

Description

48%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description communicates a clear niche (API mocking for dev/test/demo) with a couple of concrete actions, but it uses second-person voice, lacks any "Use when..." trigger clause, and misses common synonyms like stub or fake API. It is serviceable but below the quality of the reference good examples.

Suggestions

Rewrite in third person (e.g., "Designs and builds realistic mock APIs...") to avoid the second-person specificity penalty.

Append an explicit trigger clause: "Use when the user needs to mock, stub, or fake an API, or when frontend work must proceed before the backend is ready."

Include natural synonyms and terms users actually say: mock server, stub, fake API, contract testing.

DimensionReasoningScore

Specificity

"Design mocks that simulate real API behavior and enable parallel development" names the domain with 2-3 concrete actions, which alone fits anchor 3, but the description opens with second person ("You are an API mocking expert"), which the guidelines penalize by reducing specificity by 1.

2 / 5

Completeness

The "what" is clear (design realistic mock services simulating real API behavior), but there is no "Use when..." clause or equivalent explicit trigger guidance, capping completeness at 3 per the judging guidelines.

3 / 5

Trigger Term Quality

"API mocking", "mock services", and "development, testing, and demos" are relevant keywords, but common variations users would naturally say — stub, fake API, mock server, contract testing — are missing, matching the "some relevant keywords but missing common variations" anchor.

3 / 5

Distinctiveness Conflict Risk

"API mocking" and "mock services" carve out a fairly distinct niche with clear triggers, though there is minor overlap risk with general API-testing or testing-framework skills.

4 / 5

Total

12

/

20

Passed

Validation

93%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

15

/

16

Passed

Repository

administrakt0r/AI-Agents-Safe-Coding-Skills

Path

plugins/AI-Agents-Safe-Coding-Skills-claude/skills/api-testing-observability-api-mock/SKILL.md

Reviewed

Table of Contents

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