Conciseness

The body is dense, rule-based prose with no explanation of concepts Claude already knows, but the landed-cost component list is repeated nearly verbatim ('origin shipping, international shipping, insurance, tax or VAT, duty, brokerage, currency conversion, payment fees, final-mile delivery' at line 50 and again at line 86) and a few rhetorical framing lines ('This is a core pillar, not a footnote on price') could be trimmed. Minor trims only, so it is efficient-but-not-lean (score 4), not the every-token-earns-its-place score 5.

Actionability

Concrete guidance throughout: a 9-level ordered savings hierarchy, named stop conditions, enumerated output shapes with exact fields, evidence levels (A–D), and specific tooling instructions ('use `contract/src/landed-cost.ts`. Money is integer cents'; 'score that match with `typesafe/jev-1.13` on `https://openrouter.ai/api/alpha/decisions`'). Not score 5 because the research-phase mechanics and any worked example are deferred to specification.md — no sample dossier or brief is shown in-body — leaving minor gaps between direction and execution.

Workflow Clarity

The 'Run a case' section gives a clear ordered sequence ('Work the savings hierarchy in order and stop at the first level that meets the need'), an explicit termination checkpoint ('End when a stop condition is met and name it: sufficiently resolved, diminishing returns, evidence ceiling, identity unresolved, constraint blocked, or effort exceeded'), and a named research-pillar checklist with an unknown-is-valid rule. Not score 5 because per-phase validation checkpoints are deferred to the specification rather than stated inline; not score 3 because sequence, checkpoints, and end conditions are explicit in the body.

Progressive Disclosure

The single external reference is clearly signaled, versioned, and one level deep ('The full doctrine is [references/specification.md](references/specification.md), version 1.1... If this file and the specification disagree, the specification wins'), and the body is well sectioned. Not score 5 because the body also directs the reader to `contract/src/landed-cost.ts`, which is not present in the skill's bundle (references/ contains only specification.md) — a referenced path that does not resolve.

Specificity

The description lists multiple concrete capabilities — 'landed cost, private-label or OEM equivalents, buy-price alerts, basket or annual procurement plans, and the savings ledger' — covering what, whether, where, when, how much, and how delivered. Coverage is comprehensive rather than minor-gapped, matching the score-5 anchor rather than score 4.

Completeness

It explicitly answers what ('Act as the professional purchasing department for a household') and when ('Use this skill whenever someone asks...') with concrete trigger phrases. This matches the score-5 anchor exactly; score 4 would require the 'when' to be less explicit or specific, which it is not.

Trigger Term Quality

Natural question-form triggers ('what to buy, whether to buy, where to source it, when to buy, how much to order, how it should be delivered') are paired with noun-form synonyms ('professional buyer, household procurement, annual savings, a buying brief, global or cross-border sourcing, delivery windows, or consolidating orders'). Both question and synonym coverage are present, so it fits the comprehensive score-5 anchor rather than the few-terms-missing score-4 anchor.

Distinctiveness Conflict Risk

A clear niche (household procurement strategy) with distinct triggers and explicit negative delimitation — 'This is not a coupon bot and not a sticker-price comparison' — minimizes mis-triggering onto adjacent shopping/coupon skills. It sits at the clear-niche score-5 anchor, not the minor-overlap score-4 anchor.