Conciseness

The body is dense with Stripe-specific, non-generic facts (monthly release cadence, thin vs. snapshot events, fixed versions in strongly-typed SDKs, 255-char object IDs, 72-hour rollback window), and hard-coded example versions are mitigated by the explicit instruction to "Replace bundled API versions shown in those examples with the selected target". Not 5 because a few passages explain things Claude already knows, notably the generic MAJOR/MINOR/PATCH semantic-versioning bullets in the mobile SDK section, and the prose could be tightened in places. Not 3 because these are minor, isolated instances rather than padded sections.

Actionability

Mostly executable guidance: copy-paste code for global config (Python, Ruby, Node), per-request override, the curl Stripe-Version test header, script-tag/npm install for Stripe.js, and concrete update commands ("npm update stripe", "pip install --upgrade stripe"). Not 5 because two common paths are prose-only: the strongly-typed SDK (Java/Go/.NET) update is described as "update the SDK to target a new API version" with no package/release mechanics, and the webhook signing-secret cutover has no code or commands.

Workflow Clarity

The 9-step Upgrade Checklist gives a clear sequence with explicit validation checkpoints — "Test your integration against the new API version using the Stripe-Version header", "create and test a replacement destination", dual-secret acceptance "during testing and cutover", and disabling the old destination after cutover — plus an explicit error-recovery path ("For 72 hours after upgrading, you can roll back to your previous API version in Workbench"). The destructive/batch cap does not apply since validation and rollback steps are present.

Progressive Disclosure

No bundle files exist, so the skill is a single ~200-line file with well-organized section headers and clearly signaled one-level-deep external links (docs.stripe.com). This exceeds the under-50-line simple-skill exception, and sections like Stripe.js and Mobile SDK versioning could be split into reference files if the skill grows, so it is not 5 — but structure and navigation are good with no buried or nested references.

Specificity

The description enumerates concrete upgrade targets — "Stripe API versions, webhook endpoints, server-side SDKs, Stripe.js, and mobile SDKs" — giving the scope real specificity, but "upgrading" is the only verb and the concrete actions of the upgrade process itself (e.g., checking the changelog, updating version pins, testing) are not listed. This sits between anchor 3 (1-2 concrete actions) and anchor 5 (multiple distinct actions), noticeably above the midpoint.

Completeness

The "what" is clear ("Guide for upgrading Stripe API versions, webhook endpoints, server-side SDKs, Stripe.js, and mobile SDKs"), but there is no "Use when..." clause or any equivalent explicit trigger guidance. Per the judging guidelines, a missing trigger clause caps completeness at 3.

Trigger Term Quality

"upgrading", "Stripe API versions", "webhook endpoints", "server-side SDKs", "Stripe.js", and "mobile SDKs" are natural phrases a user with this need would say. Common synonyms and variations such as "update", "migrate", or "bump" a Stripe version/SDK are missing, so it falls just short of comprehensive keyword coverage.

Distinctiveness Conflict Risk

"Guide for upgrading Stripe API versions, webhook endpoints, server-side SDKs, Stripe.js, and mobile SDKs" names a narrow, well-defined niche with distinct Stripe-specific triggers; minimal risk of firing for an unrelated skill. Not 4 because there is no meaningful overlap with adjacent skills — the Stripe framing fully disambiguates.