Conciseness

The body is a lean numbered checklist with no explanation of concepts Claude already knows; it delegates detail to "docs/ARCHITECTURE.md" and "@builder", so every token earns its place.

Actionability

Concrete artifacts are given (directory tree, index.ts template, "npx astro check && npx astro build"), but "@builder" is never defined and the index.ts snippet shows only comments rather than an actual export statement — minor gaps that keep it below fully copy-paste ready.

Workflow Clarity

Steps 1-7 are clearly sequenced and a validation checkpoint exists (step 7), but there is no error-recovery loop (what to do when astro check fails) and the user-questions step comes after the directory structure is already created.

Progressive Disclosure

With no bundle files, the under-50-line body is well organized and its single external reference is clearly signaled with pinpoint sections ("Read docs/ARCHITECTURE.md sections 2, 3 and 4"), matching the simple-skill exception for a top score.

Specificity

The description enumerates concrete deliverables ("service, adapter, types, pages, components, and tests") making the scope specific, but rests on a single action verb ("creating"), so it is not the comprehensive multi-action coverage of a 5.

Completeness

An explicit "Use when..." clause answers when, and the what (a module with all layers) is clear, but both are merged into a single clause rather than distinct statements with concrete trigger phrases.

Trigger Term Quality

"creating a new feature module" is a natural phrase a user would say, but common variations and synonyms ("add", "scaffold", "generate", "new module") are missing, matching the anchor for some relevant keywords without variations.

Distinctiveness Conflict Risk

The description carves out a clear niche — greenfield full-stack module scaffolding for a specific service/adapter/pages architecture — and "with all layers" distinguishes it from single-component or single-file skills, giving minimal conflict risk.