Conciseness

The body contains no explanations of concepts Claude already knows and is dense with non-obvious operational specifics (key prefixes appl_/goog_/amzn_, exact MCP tool and rc command names, detection ordering, store-console permission names like "View financial data"). Every section carries project-specific knowledge, fitting the lean-and-efficient anchor rather than the minor-trimming anchor at 4.

Actionability

Guidance is copy-paste executable throughout: `list-projects` / `rc projects list`, `create-app` with concrete type/bundle_id/package_name fields, `rc apps keys <app-id>`, and a file-pattern platform-detection algorithm with an explicit precedence order. Code snippets are deliberately delegated to self-contained platform files, which the rubric's scoring notes accept for instruction-only skills with actionable guidance.

Workflow Clarity

A clearly numbered pipeline (status quo → dashboard → SDK → verify → next steps) with an explicit validation gate — "Do not claim setup is complete until: builds / configure log line / no credentials errors" — plus ambiguity handling (outermost-project rule, ask-if-ambiguous) and error diagnostics (a wrong API key surfaces on the SDK's first network calls). This is not a destructive or batch operation, so the cap-3 rule does not apply.

Progressive Disclosure

The overview keeps shared concepts inline and splits platform-specific detail one level deep into clearly signaled platforms/*.md files, each with an explicit read trigger and a stated self-containment contract ("install command, exact configure snippet, and where to place it"), plus well-signposted handoffs to sibling skills. Note: no bundle files were present in the review workspace, so this score reflects the body's reference architecture; the anchors for structure and navigation are fully met.

Specificity

"sets up the dashboard side via the RevenueCat MCP or the `rc` CLI (project, app, public API key) and installs/configures the Purchases SDK in the app" lists multiple concrete actions covering both halves of the integration (create project, register app, obtain public API key, install SDK, configure on launch), matching the comprehensive-coverage anchor rather than the minor-gaps anchor at 4.

Completeness

It explicitly answers both questions: the "what" (dashboard-side setup via MCP or rc CLI for project/app/API key, plus SDK install and configuration) and the "when" via a literal "Use when the user asks to…" clause with concrete trigger phrases, exactly matching the anchor 5 example structure.

Trigger Term Quality

"add RevenueCat, hook up RevenueCat, add subscriptions or in-app purchases, integrate Purchases, install the RevenueCat SDK, set up a RevenueCat API key, configure Purchases on launch" covers natural user phrasings including synonyms (hook up / add / integrate / install / set up), plus all five platform names — comprehensive natural-term coverage per the anchor 5 example.

Distinctiveness Conflict Risk

The RevenueCat niche is clear and product-named, but the trigger "set up a brand new RevenueCat integration" overlaps the sibling `create-revenuecat-project` skill that the body actually delegates bootstrap to — minor overlap risk with a closely related skill, fitting anchor 4 rather than the minimal-conflict anchor 5.