Conciseness

The body is dense with Stripe-specific facts Claude cannot reliably know (monthly no-breaking-change cadence, thin vs. snapshot events, snapshot_api_version immutability, 72-hour rollback), and time-sensitive versions are handled self-awarely ('a fallback version dated more than a month ago is probably stale', 'Replace bundled API versions shown in those examples with the selected target'). Minor over-explanation remains — the generic MAJOR.MINOR.PATCH semver bullets and the backward-compatible/breaking-change taxonomy — so it fits 'efficient with minor trimming' rather than the lean anchor.

Actionability

Fully executable guidance throughout: copy-paste-ready client config in Python/Ruby/JavaScript, a curl example with the Stripe-Version test header, concrete update commands ('npm update stripe', 'pip install --upgrade stripe', 'npm install @stripe/stripe-js'), per-language version-pinning rules, and specific doc URLs — covering the common cases.

Workflow Clarity

The 9-step Upgrade Checklist is clearly sequenced with explicit validation checkpoints: test with the Stripe-Version header before switching, 'create and test a replacement destination', dual signing secrets 'during testing and cutover', 'disable or delete the old destination' after cutover, and a 72-hour rollback path, plus conditional branches for unchanged pins and unverified versions.

Progressive Disclosure

No bundle files exist, so inline content is the only option; sections are well-organized with clear headers and one-level-deep external references to docs.stripe.com. Some per-platform detail (SDK snippets, mobile versioning specifics) could live in reference files to slim the main skill, which is the minor gap keeping it below the top anchor.

Specificity

Names the domain and enumerates concrete targets — 'API versions, webhook endpoints, server-side SDKs, Stripe.js, and mobile SDKs' — which goes beyond 1-2 actions, but a single generic verb ('Guide for upgrading') governs all of them, leaving minor coverage gaps (testing, rollback) that keep it below the comprehensive anchor.

Completeness

The 'what' is clear (upgrading Stripe API versions, webhooks, and SDKs), but there is no 'Use when...' clause or equivalent explicit trigger guidance, which the rubric guideline caps at 3; the 'when' is only weakly implied by the domain itself.

Trigger Term Quality

Includes natural terms users would say ('upgrading', 'Stripe', 'API versions', 'webhook', 'SDKs', 'Stripe.js') with good coverage, but misses common variations and synonyms such as 'update', 'migrate', or 'API version pin', so it falls short of the comprehensive anchor.

Distinctiveness Conflict Risk

'Stripe' combined with specific artifacts (webhook endpoints, Stripe.js, mobile SDKs) carves a clear niche with distinct triggers and minimal risk of firing for the wrong skill.