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validating-api-schemas

Validate API schemas against OpenAPI, JSON Schema, and GraphQL specifications. Use when validating API schemas and contracts. Trigger with phrases like "validate API schema", "check OpenAPI spec", or "verify schema".

Quality

81%

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SecuritybySnyk

Passed

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SKILL.md
Quality
Evals
Security

Quality

Content

78%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.

A well-structured skill body with a clearly sequenced validation workflow, specific tools and checks, and exemplary progressive disclosure to verified one-level-deep reference files. The main improvement opportunities are adding executable tool invocation commands and trimming mild redundancy in the Overview and Error Handling table.

Suggestions

Include one or two concrete tool invocation commands in the Instructions (e.g., the Spectral lint command and an oasdiff invocation) so the validation steps are directly executable rather than implied.

Tighten the Error Handling table by dropping the obvious 'Cause' column entries and leaving diagnosis detail to references/errors.md, which already expands on these patterns.

Add an explicit feedback loop to the workflow (re-run validation after applying fixes and only regenerate the report once findings are re-confirmed) to strengthen the checkpoint structure.

DimensionReasoningScore

Conciseness

The body is dense and assumes Claude's competence — no explanations of what OpenAPI or JSON Schema are, and every section carries actionable content. Minor trimmable redundancy keeps it below anchor 5: the Overview partly restates the description, and the Error Handling table's 'Cause' column spells out fairly obvious facts ('Schema references a component that does not exist or has a typo').

4 / 5

Actionability

Guidance is concrete and specific: named tools (Spectral, graphql-schema-linter, ajv-cli, oasdiff), exact checks (status codes '400, 401, 404, 500', pagination 'page/limit vs offset/count'), and explicit output file paths. Per the instruction-only note, absence of code is not penalized since the guidance is actionable; the minor gap versus anchor 5 is that no actual tool invocation commands (e.g., a Spectral lint command line) appear in the body.

4 / 5

Workflow Clarity

The eight numbered steps form a coherent sequence (locate specs → structural validation → lint → completeness → security → breaking changes → consistency → severity-tagged report with file:line references), and the Error Handling table supplies recovery guidance. It sits at anchor 4 rather than 5 because there is no explicit validate-then-fix-then-re-run feedback loop stated in the workflow itself.

4 / 5

Progressive Disclosure

A clear overview body with well-signaled, one-level-deep references — references/implementation.md, references/errors.md, and references/examples.md are all real files (verified), clearly linked, and contain no nested references — plus a real scripts/validate-schema.sh. Content is appropriately split: workflow in the body, deep detail in the reference files. This matches the anchor-5 example structure.

5 / 5

Total

17

/

20

Passed

Description

78%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.

A well-formed description that explicitly covers what the skill does and when to use it, with concrete trigger phrases and a clearly defined domain across three specification standards. Its main limitations are a single-action 'what' statement and the slightly generic trigger 'verify schema' that could overlap with database schema work.

DimensionReasoningScore

Specificity

The description names the domain precisely ('Validate API schemas against OpenAPI, JSON Schema, and GraphQL specifications') but offers only a single action — 'Validate' — with no concrete sub-actions such as linting, breaking-change detection, or completeness auditing. This matches the anchor 'Names domain and 1-2 concrete actions, but not comprehensive', and falls short of anchor 4, which requires several specific listed actions.

3 / 5

Completeness

It explicitly answers both questions: what ('Validate API schemas against OpenAPI, JSON Schema, and GraphQL specifications') and when ('Use when validating API schemas and contracts' plus 'Trigger with phrases like "validate API schema", "check OpenAPI spec", or "verify schema"'). This mirrors the anchor-5 example structure of what + when + concrete trigger phrases, so it is not anchor 4 where the 'when' is only weakly specified.

5 / 5

Trigger Term Quality

Concrete trigger phrases are given ('validate API schema', 'check OpenAPI spec', 'verify schema') plus 'API schemas and contracts' — good natural keyword coverage. It falls short of anchor 5 because common synonyms ('lint API', 'schema linting') and file extensions (.yaml, .json, .graphql) are missing, but it is well above anchor 3's 'missing common variations'.

4 / 5

Distinctiveness Conflict Risk

The niche is clear — API specification validation against named standards — with distinct triggers like 'check OpenAPI spec'. However, 'verify schema' is generic enough to overlap with database-schema or migration skills, matching anchor 4 ('minor overlap risk with closely related skills') rather than anchor 5's minimal conflict risk.

4 / 5

Total

16

/

20

Passed

Validation

87%

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

Validation — 14 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

allowed_tools_field

'allowed-tools' contains unusual tool name(s)

Warning

frontmatter_unknown_keys

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

Warning

Total

14

/

16

Passed

Repository

jeremylongshore/tons-of-skills-marketplace

Path

plugins/api-development/api-schema-validator/skills/validating-api-schemas/SKILL.md

Reviewed

Table of Contents

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