Conciseness

The body is dense domain-specific material Claude would not already know (benchmarks like "M1 renewal > 70%", "iOS: 6 days (configurable up to 16)"), with tables instead of prose and no concept re-explanation. A few lines ("Messages should show value, not just create pressure", "Maximize grace period length — every extra day recovers more subscribers") are mild commentary that could be trimmed, so anchor 4 rather than a perfectly lean 5.

Actionability

For an instruction-only skill the guidance is fully concrete and executable: a day-by-day dunning schedule ("Day 7 — retry #3 — show in-app 'Update payment method' banner"), a week-by-week win-back offer ladder with specific discounts ("Week 6: 3 months at 50% off"), exact survey options, config paths, and a copy-paste Output Format template — matching anchor 5's specific-examples-covering-common-cases.

Workflow Clarity

The four lifecycle stages are clearly sequenced and the Output Format template functions as a checkpoint (each metric compared to its benchmark to derive "Top issues" and a "Priority action"). There is no explicit validate→fix→retry feedback loop, so this sits at anchor 4 rather than 5; it is not capped at 3 because the skill involves no destructive or batch operations.

Progressive Disclosure

Sections are well-organized, but everything is inlined in one ~200-line file, and the only bundle reference — "See `revenuecat.md` integration guide" — points to a file that does not exist anywhere in the skill directory (no references/, scripts/, or assets/ folders). Per the guideline to score against the actual bundle structure, a dangling reference plus inline content that could be split (RevenueCat/dunning details) matches anchor 3's 'references present but not clearly signaled / content that should be separate is inline'.

Specificity

"optimize their subscription business end-to-end — from trial start through renewal, cancellation, and win-back" names the domain and lifecycle stages, but the action verb is a single generic 'optimize' rather than several concrete actions, matching anchor 3. Not anchor 2 (domain plus stage range exceeds 'minimal or generic'), not anchor 4 (no list of several distinct actions).

Completeness

Explicitly answers 'what' ("optimize their subscription business end-to-end — from trial start through renewal, cancellation, and win-back") and 'when' ("Use when the user mentions 'subscription lifecycle', 'trial conversion'..."), matching anchor 5's what-and-when-with-concrete-triggers example exactly. Uses third person voice as required.

Trigger Term Quality

The 'Use when the user mentions' clause lists eleven natural terms including synonyms and colloquial variations ("churn", "win-back", "lapsed subscribers", "dunning", "billing retry", "resubscribe"), matching the comprehensive-synonyms anchor. Neighboring anchor 4 requires missing natural terms, which is not the case here.

Distinctiveness Conflict Risk

A clear subscription-lifecycle niche with active disambiguation ("For paywall design and pricing strategy, see monetization-strategy. For subscription analytics dashboards, see app-analytics."), but triggers like "churn" and "renewal rate" could also plausibly fire a retention-focused skill that is not disambiguated in the description — minor overlap risk with closely related skills, i.e. anchor 4 rather than 5.