Conciseness

The body is lean with zero padding: every line is instruction (file paths, ordering, constraints, one validation command) and it assumes Claude's competence, e.g. "Service: NO try/catch, NO .map()/.filter()/new Date()" with no concept explanations. This matches the 5 anchor where every token earns its place.

Actionability

Concrete guidance includes exact file patterns ("types/[resource].types.ts", "adapters/[resource]-adapter.ts"), an executable validation command ("npx tsc --noEmit"), and specific user questions to ask. It stops short of fully copy-paste-ready content since it delegates file contents to docs/ARCHITECTURE.md sections 4.1-4.3 without inline examples, matching the 4 anchor's 'minor gaps' rather than the 5 anchor.

Workflow Clarity

Steps 1-5 are clearly sequenced (read docs, gather requirements, create files in order, apply rules, validate with tsc) with a concrete validation checkpoint. It lacks an explicit error-recovery feedback loop (e.g. 'if tsc fails, fix and re-run'), which the 5 anchor requires, so it fits the 4 anchor of clear sequence with minor validation gaps.

Progressive Disclosure

This is a simple single-purpose skill under 50 lines with no bundle files, organized under a clear "## Steps" section, which the rubric's simple-skill guideline says can score 5 with just well-organized sections. Its single reference (docs/ARCHITECTURE.md sections 4.1-4.3) is clearly signaled and one level deep.

Specificity

Phrases like "creates types, contracts, adapter, and service layer" list four concrete deliverables, matching the anchor for several specific actions with minor gaps. It falls short of a 5 because only one generic verb ("creates") is used and the full range of actions (asking for endpoint details, validating) is not covered.

Completeness

It explicitly answers both questions: "Use when adding API integration to a module" is a concrete when-trigger, and "creates types, contracts, adapter, and service layer" is a clear what. This matches the 5 anchor's structure of explicit what AND when with concrete trigger phrases, and exceeds the 4 anchor where the 'when' is less specific.

Trigger Term Quality

"adding API integration", "module", "adapter", and "service layer" are natural developer phrases a user would plausibly say, giving good keyword coverage. It misses common synonyms such as "endpoint", "REST", or "data layer", so it does not reach the comprehensive 5 anchor.

Distinctiveness Conflict Risk

The niche (scaffolding types/contracts/adapter/service layer for a module) is mostly distinct with specific architectural terms. Minor overlap risk remains with related skills for consuming or building APIs, keeping it below the minimal-conflict 5 anchor.