Conciseness

The body is short with no concept-explanation padding (no "what is OpenAPI" material), but the "Do not use this skill when" bullets ("The task is unrelated to openapi spec generation", "You need a different domain or tool outside this scope") are tautological template filler that could be trimmed. Not 5 because those vacuous tokens do not earn their place; not 3 because it is otherwise efficient.

Actionability

"Clarify goals, constraints, and required inputs" and "Apply relevant best practices and validate outcomes" are vague platitudes with no code, commands, tool names, or spec structure to produce; the only concrete directive — "open `resources/implementation-playbook.md`" — points to a file that does not exist in the bundle. Not 3 because there is no usable executable guidance; not 1 because high-level hints and one specific file pointer are present.

Workflow Clarity

"Clarify goals → Apply best practices → Provide actionable steps and verification" is a rough generic sequence with many gaps; no OpenAPI-specific steps and no validation checkpoints (e.g., spec linting, round-trip verification, error recovery). Not 3 because the sequence present is template boilerplate rather than an actual OpenAPI workflow; not 1 because a rough order of operations does exist.

Progressive Disclosure

The single reference ("`resources/implementation-playbook.md` for detailed patterns and examples") is clearly signaled and one level deep, but no `resources/` directory or playbook file exists in the bundle — all substance is delegated to a missing file, breaking navigation. Not 3 because a dangling reference is a worse defect than unclear signaling; not 1 because the section structure and reference signaling themselves are correct.

Specificity

"Generate and maintain OpenAPI 3.1 specifications from code, design-first specs, and validation patterns" names the domain and several concrete actions across three input patterns. Not 5 because coverage has minor gaps (what "maintain" concretely involves, which validation tooling); not 3 because it lists more than 1-2 specific actions.

Completeness

It explicitly answers "what" ("Generate and maintain OpenAPI 3.1 specifications from code, design-first specs, and validation patterns") and "when" ("Use when creating API documentation, generating SDKs, or ensuring API contract compliance") with concrete trigger phrases, matching the top anchor. Not 4 because the "when" clause is explicit and specific rather than weakly implied.

Trigger Term Quality

"API documentation", "generating SDKs", "API contract compliance", and "OpenAPI 3.1" are natural user phrases with good coverage. Not 5 because the common synonym "Swagger" and file extensions (openapi.json, swagger.yaml) are missing; not 3 because keyword coverage is solid rather than partial.

Distinctiveness Conflict Risk

"OpenAPI 3.1" establishes a clear niche with distinct triggers. Not 5 because "creating API documentation" and "generating SDKs" are broad enough to create minor overlap risk with general API-documentation or SDK tooling skills; not 3 because the explicit OpenAPI 3.1 scope keeps it mostly distinct.