Conciseness

The body is lean and declarative throughout ("Swagger 2.0 fails.", "Standalone SSE and stdio servers fail.", "Done when you hold at least one usable source URL"), with no explanation of concepts Claude already knows and every sentence carrying non-obvious domain rules. It matches the level-5 anchor 'lean and efficient; assumes Claude's competence; every token earns its place'.

Actionability

Guidance is copy-paste executable: exact commands ("npx vitest run --project server recipes.server", "npm run check --prefix apps/reef", "./dev run"), exact file paths, a URL pattern for live testing, and a warning against a broken command ("Do not use `npm test -- recipes.server`"). Concrete examples (linear, github, sentry, hubspot, attio) anchor each decision rule, matching the level-5 anchor for fully executable, ready guidance.

Workflow Clarity

Six clearly sequenced numbered sections with explicit checkpoints and feedback loops: a stop-and-ask gate for existing ids, 'Done when' criteria in sections 2 and 4, a plan-then-wait-for-approval gate before writing, and 'Run, and fix until both pass' plus direct source verification (fetch the URL, POST an initialize request). This matches the level-5 anchor of clear sequencing with explicit validation and error-recovery loops.

Progressive Disclosure

The skill ships no bundle files and keeps the body well-sectioned, pushing detail to one-level-deep repo artifacts clearly signaled up front (GLOSSARY.md, ADRs, schema.json, example recipes, docs/development.md). It falls short of level 5 because sizable decision-rule blocks (the seven authentication rules and the icon/light-dark variant guidance) are fully inlined and could live in a small reference file, and there are no bundled references of its own.

Specificity

The description names two concrete actions ("Research an upstream service" and "write a Provider Recipe for it in apps/reef/recipes") with a concrete artifact and location, matching the 'names domain and 1-2 concrete actions' anchor. It does not list the several specific actions a recipe involves (auth methods, sources, icons), so it falls short of the level-4 anchor 'lists several specific actions'.

Completeness

The 'what' is clear (research a service, write a Provider Recipe at a specific path), but there is no 'Use when...' or equivalent trigger guidance, capping completeness at 3 per the judging guidelines. Level 4 requires both 'what' and an explicit 'when'; level 2 would require a vague 'what', which does not apply.

Trigger Term Quality

Relevant keywords are present ("Research", "upstream service", "Provider Recipe", "recipes") but common variations a user might say are missing (e.g. "add a provider", "integrate a service", "new integration"). This fits the level-3 anchor 'some relevant keywords but missing common variations or synonyms' rather than level 4's 'good keyword coverage'.

Distinctiveness Conflict Risk

The artifact-specific terms "Provider Recipe" and "apps/reef/recipes" carve out a clear niche with minimal overlap risk. It is not quite level 5 because "Research an upstream service" is somewhat generic on its own and the description lacks distinct trigger phrases, leaving minor overlap risk with research-oriented skills.