Conciseness

The body is dense and library-specific with terse bullets that assume competence ('Override pk() only when the primary key ≠ id', 'pk() return type is number | string | undefined'), with no generic-library filler. However, section 5 inlines ~50 lines of pk-routing/nonFilterArgumentKeys detail — including an example duplicated verbatim in references/Collection.md (lines 266–267) — that could be trimmed to the key insight plus a link.

Actionability

Mostly concrete and executable: copy-paste snippets for Query, Union, and Collection's argsKey/nestKey trick, a full extenders table (push/unshift/assign/remove/move/addWith/moveWith), and named API options ('static indexes', 'nonFilterArgumentKeys: /orderBy|sortDir/'). Minor gaps: the most common cases (Entity with defaults, pk override, static schema) get directive-only bullets with no inline example, and the 'define Query in src/resources/, not in hooks' guidance lacks a counter-example.

Workflow Clarity

This is a reference/decision-guide rather than a sequential workflow, and its topic order is coherent (define → entity rules → lifecycle → patterns → pitfalls), with explicit decision rules ('use the same Entity as the schema — don't create a wrapper entity') and a 'Common Mistakes to Avoid' section acting as error avoidance. No validation checkpoints are needed since it covers no destructive or batch operations, but the lifecycle and normalize/denormalize orders read as prose rather than a checkable sequence, keeping it below a 5.

Progressive Disclosure

Good structure: a well-annotated References section, all 20 referenced files verified to exist, references exactly one level deep (no reference file chains onward), a clear Vue '<name>.vue.md' convention, and one justifiable external link. The gap is that section 5's Collection routing detail duplicates content in references/Collection.md, so some content that belongs in the reference is inlined in the overview.

Specificity

It names the concrete toolkit (Entity, EntityMixin, Collection, Union, Query, Values, All, Invalidate, Lazy, Scalar) and concrete operations (defining or editing pk, static schema, resource()/RestEndpoint schema, push/unshift/assign/remove/move, cache invalidation) — comprehensive and specific, not a 4 since coverage spans the full schema surface. It is not a 5-tier over-claim; every listed action is a real capability of the skill.

Completeness

Explicitly answers both halves: what ('Model data with @data-client schemas... via normalization, identity-based caching, and a single source of truth') and when, with two concrete trigger clauses ('Use when defining or editing...' and 'Apply proactively when discussing...'). This matches the 5 anchor's pattern of concrete what + explicit trigger phrases.

Trigger Term Quality

Comprehensive natural-term coverage with explicit synonyms: 'relational/nested/joined data', 'mutable lists/maps' and 'mutable collections', 'memoized selectors / derived data', 'polymorphic/discriminated types', 'partial/supplementary entities', plus 'data models, remote data shape, caching, normalization, identity, joins, polymorphism, store consistency'. These are the phrases a developer would naturally say; not a 4 because no common synonym family is missing.

Distinctiveness Conflict Risk

The description is anchored to the @data-client package family (@data-client/rest, /endpoint, /graphql, /normalizr) with library-specific vocabulary (pk, referentially-equal, resource()), giving it a clear niche. Not a 5: the proactive-trigger tail ('data models, caching, normalization, store consistency') is broad enough to overlap with generic state-management or caching skills in a large skill collection.