Conciseness

The body is ~25 lines of pure routing: a task-to-API table, one directive ('Read the relevant reference file before answering any integration question or writing code'), and three external doc links. Every token earns its place; no concepts Claude already knows are explained. The single time-sensitive line ('Latest Stripe API version: 2026-02-25.clover') states a version pin with a clear default rule rather than branching date logic, so it does not trigger the date-penalty.

Actionability

The routing table gives concrete decision guidance — it names exact APIs ('Checkout Sessions + Payment Element', 'Accounts v2 (/v2/core/accounts)', 'Setup Intents') and exact file paths per task. It is instruction-only with no inline code, but the guidance is specific and actionable, so absence of code is not penalized; however, executable detail is deferred entirely to the reference files, which fits 'mostly executable guidance with minor gaps' rather than fully copy-paste-ready coverage of common cases.

Workflow Clarity

This is a simple routing skill and the single action is unambiguous: identify what is being built in the table, then 'Read the relevant reference file before answering any integration question or writing code'. No destructive or batch operations exist, so no validation checkpoints are required, and the simple-skill exception applies — the sequence (route → read reference → answer/build) is fully explicit with a fallback section ('When the user's request does not clearly fit a single domain above, consult:') covering the ambiguous case.

Progressive Disclosure

Clear overview with well-signaled one-level-deep references: all four referenced files (references/payments.md, connect.md, billing.md, treasury.md) exist in the bundle, are directly linked from the routing table by task, and none nest further references. The 'Key documentation' section adds labeled external links for out-of-scope cases. This matches the top anchor for easy navigation with appropriately split content.

Specificity

Lists multiple specific concrete actions with comprehensive coverage: 'API selection (Checkout Sessions vs PaymentIntents)', 'Connect platform setup (Accounts v2, controller properties)', 'billing/subscriptions', 'Treasury financial accounts', 'integration surfaces', and 'migrating from deprecated Stripe APIs'. This matches the anchor for multiple specific actions with comprehensive coverage, and is not merely the 4-anchor ('minor gaps in coverage') since all major Stripe integration domains are enumerated.

Completeness

Explicitly answers both questions: the 'what' is 'Guides Stripe integration decisions' with enumerated domains, and the 'when' is the explicit 'Use when building, modifying, or reviewing any Stripe integration' clause with concrete trigger phrases. This matches the top anchor; it is not the 4-anchor case because the 'when' is fully explicit and specific rather than improvable.

Trigger Term Quality

The 'Use when' clause enumerates natural user phrasings: 'accepting payments, building marketplaces, integrating Stripe, processing payments, setting up subscriptions, or creating connected accounts'. These cover the natural synonyms a user would say, matching the comprehensive-coverage anchor rather than the 4-anchor where 'a few natural terms missing' applies — none of the common Stripe request phrasings are absent.

Distinctiveness Conflict Risk

The description has a clear niche (Stripe integrations specifically) with distinct triggers tied to Stripe product vocabulary ('Checkout Sessions', 'PaymentIntents', 'Accounts v2', 'connected accounts'), minimizing conflict risk with generic payment or documentation skills. It matches the clear-niche/minimal-conflict anchor, not the 4-anchor 'minor overlap risk with closely related skills', since the Stripe-specific terminology disambiguates it from any neighboring skill.