Conciseness

The body is efficient and assumes Claude's competence — no padding, no explaining what OpenAPI or Faker is; instructions carry concrete specifics ("50-500ms per endpoint", "400, 401, 404, 429, or 500") and the error table is compact. Minor instances could be trimmed (the Prerequisites list mixes requirements with context like "Frontend ... needing API stubs"), so it fits anchor 4 rather than the fully lean anchor 5.

Actionability

The body gives specific guidance (tools to use, latency ranges, status codes, exact output file layout) but contains no executable code or commands at all — even a one-line quick start like `npx @stoplight/prism-cli mock openapi.yaml` lives only in references/examples.md. Worse, the deferred "full implementation guide" (references/implementation.md) actually describes building a production API (ORM models, rate limiting, load testing) rather than mock servers, so key execution details are effectively missing. This fits anchor 3 (some concrete guidance but incomplete); it is not 4 because no executable command or code sample appears in the body.

Workflow Clarity

Steps 1-8 form a clear, logical sequence (read spec → generate fixtures → configure matching → stateful CRUD → latency → error scenarios → recording → startup script), but no validation checkpoint exists in the workflow — there is no step to verify generated fixtures conform to the OpenAPI schema or to smoke-test the running server; fixture-vs-schema checking appears only reactively in the error-handling table. That matches anchor 3 (steps listed, checkpoints missing or implicit); it is not 4 because a verify step is wholly absent rather than a minor gap.

Progressive Disclosure

Good structure: a ~65-line overview with three clearly signaled, one-level-deep markdown-linked references (implementation.md, errors.md, examples.md), all of which exist, with bulk detail appropriately pushed out of SKILL.md. It falls short of anchor 5 because two of the three referenced files (implementation.md, errors.md) drift from the mock-server topic — they cover production API development and real API error handling — so the "See ... for the full implementation guide" navigation does not deliver matching content.

Specificity

The description names the domain and a single concrete action — "Generate mock API servers ... with realistic response data" — but does not list the several specific capabilities the skill actually covers (OpenAPI-spec-driven generation, stateful CRUD, latency simulation, request recording). It fits anchor 3 (domain + 1-2 concrete actions, not comprehensive); it is not 4 because no list of several specific actions is present.

Completeness

It clearly answers "what" ("Generate mock API servers for testing and development with realistic response data") and explicitly answers "when" with an explicit Use-when clause plus concrete trigger phrases ("Use when creating mock APIs for development and testing. Trigger with phrases like 'create mock API', 'generate API mock', or 'setup mock server'"). This matches anchor 5; it is not 4 because the 'when' is fully explicit with concrete triggers rather than merely present.

Trigger Term Quality

Explicit natural trigger phrases ("create mock API", "generate API mock", "setup mock server") match what a user would actually say, but common synonyms and variations like "stub", "fake API", "mock endpoints", or "API stubbing" are missing. Good coverage with a few natural terms absent fits anchor 4; not 5 because synonym coverage is incomplete.

Distinctiveness Conflict Risk

"Mock API servers" with triggers like "setup mock server" is a fairly distinct niche unlikely to hijack unrelated skills. There is minor overlap risk with general testing, server-setup, or API-development skills ("setup mock server" could match broader server-setup requests), so it fits anchor 4 rather than 5; it is clearly not 3 since the mock-API focus is specific.