Conciseness

The body is a lean router — "Use the smallest reference that matches the task.", a task-to-file table, five one-line cross-task rules, and two resource links — with no concept explanations, padding, or hardcoded dates/versions, so every token earns its place and there is nothing to trim for the level-4 anchor.

Actionability

The routing action is fully specified by the task table, and the cross-task rules name exact executable APIs (`requireUserSession(event)`, `refreshSessionCookieCache(event)`, `runWithSessionRefresh()`, `clientOnly` mode) plus a concrete finish criterion ("run the consumer's typecheck and the narrowest relevant auth test"); per the instruction-only scoring note, the absence of code blocks is not penalized since the guidance is directly actionable.

Workflow Clarity

The sequence is unambiguous — select a reference via the table, apply the cross-task rules, then an explicit validation gate before finishing (typecheck plus narrowest relevant auth test). This is not a destructive/batch/XML/database context, so no feedback-loop cap applies, and the routing decision itself is single-action unambiguous.

Progressive Disclosure

SKILL.md is a pure overview router with well-signaled, one-level-deep references: all eight linked files exist in references/, and their cross-links point only to siblings that are directly reachable from SKILL.md (a flat graph with no nested chains), giving clear navigation with appropriately split content.

Specificity

"Guides authentication in Nuxt apps using @nuxtjs/better-auth" names the domain and package, and "installing or configuring the module, using its client or server APIs, protecting routes, refreshing sessions, or integrating Better Auth plugins" lists multiple concrete actions comprehensively covering the module's scope, matching the anchor for comprehensive coverage rather than the anchor with 'minor gaps'.

Completeness

The "what" is explicit ("Guides authentication in Nuxt apps using @nuxtjs/better-auth") and the "when" is an explicit "Use when..." clause with concrete trigger phrases, exactly matching the top anchor for both; it is not the anchor where 'when' could be more explicit.

Trigger Term Quality

Triggers like "installing", "protecting routes", "refreshing sessions", "integrating Better Auth plugins", and the package name are natural and relevant, but common user phrasings such as "login", "sign in", or "auth middleware" are missing, matching the anchor for good coverage with a few natural terms absent rather than comprehensive synonym coverage.

Distinctiveness Conflict Risk

The scope is tightly pinned to Nuxt apps and the named @nuxtjs/better-auth module, giving a clear niche with distinct triggers and minimal conflict risk; no realistic wrong-skill trigger stands out, so it fits the top anchor rather than the 'minor overlap risk' anchor.