Content
77%Weight 40%Scale 1-5Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
An excellent, fully executable single-file skill with an outstanding verification checklist, held back by token inefficiency (boilerplate and triple-repeated warnings) and a monolithic structure with zero reference files. The core Server Action guidance is among the strongest possible; the packaging around it could be tightened.
Suggestions
Deduplicate the zero-decimal-currency and mandatory-customerId warnings: keep each in one authoritative section (Common pitfalls) and reference it tersely elsewhere, and trim the @supabase/ssr boilerplate to the import plus a one-line note — this targets the conciseness score.
Move the Supabase helper implementations, parse-money.ts, and the client component into references/ files with clear 'See [X](references/x.md)' pointers from the body — this targets progressive_disclosure and further reduces tokens.
Give the cited sibling skills (subscription-sync, webhooks, customer-portal, pricing-pages) concrete paths or links so the pairing guidance is navigable rather than nominal.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The body is expert-level and largely earns its tokens, but it inlines ~50 lines of @supabase/ssr client boilerplate Claude already knows, and repeats the zero-decimal-currency rule three times (the 'Common formatting traps' bullet is nearly duplicated verbatim in 'Common pitfalls') and the mandatory-customerId warning in four places. This matches 'mostly efficient but includes some unnecessary explanation or could be tightened' rather than the minor-instances 4 anchor. | 3 / 5 |
Actionability | Fully executable, copy-paste-ready code throughout: the complete getBillingHistory Server Action, the getInvoiceUrl action with an ownership check, the full parse-money.ts utility (fetch + conversion + Intl formatting with fallbacks), and the client component with Load-more and invoice download. Specific examples cover the common cases, matching the 5 anchor. | 5 / 5 |
Workflow Clarity | The main action sequences its steps explicitly (1. Authenticate → 2. Look up customer_id → 3. Resolve locale → 4. List scoped transactions → 5. Fetch one page → 6. Slim to DTO), and the 'Verify the integration' section is an 8-item validation checklist including the critical cross-customer security check, logged-out behavior, and cursor advancement. Clear sequence, explicit validation steps, and a checklist — the 5 anchor. | 5 / 5 |
Progressive Disclosure | Section structure and headers are good and external links are one level deep, but there are no bundle/reference files at all: the Supabase helper implementations, the parse-money utility, and the client component (~150 lines) are inlined where a references/ file would fit, and sibling skills (subscription-sync, webhooks, customer-portal, pricing-pages) are cited without paths. This matches 'content that should be separate is inline' (3) rather than 'most content appropriately placed' (4). | 3 / 5 |
Total | 16 / 20 Passed |