Conciseness

The body is short and lean with no explanation of concepts Claude already knows; the one redundancy is the 'What it does' section repeating the frontmatter description verbatim. Not 5 because that duplicated block does not earn its tokens; not 3 because there is no padding or unnecessary explanation beyond that.

Actionability

The core instruction 'install the upstream bundle into your active agent's skills directory' is a high-level hint with no specific steps or commands; the only concrete command is 'open https://github.com/raintree-technology/apple-hig-skills', which inspects rather than executes anything. Anchor 2 ('minimal concrete guidance; high-level hints but missing the specific steps') fits; not 3 because there is no executable step toward the actual task, and not 1 because a concrete command and a concrete next action (invoke by name) do exist.

Workflow Clarity

A rough sequence is present (inspect upstream README, install bundle, invoke by name or trigger phrase) but the steps are loosely defined and there are no checkpoints or validation. Not 4 because 'install the upstream bundle' has no concrete sub-steps; not 2 because the ordering is coherent and the final invocation step is specific. This is a non-destructive skill, so no hard cap applies.

Progressive Disclosure

No bundle files exist (no references/, scripts/, or assets/), and the body is under 50 lines with well-organized sections ('What it does', 'Source', 'How to use'). Not 5 because all substantive content is deferred to an external URL rather than to clearly signaled one-level-deep bundled references, leaving the skill with no local detail layer; not 3 because what is present is well structured and the deferral is explicitly signaled.

Specificity

The description names the domain ("Apple Human Interface Guidelines as 14 agent skills") and enumerates coverage areas ("platforms, foundations, components, patterns, inputs, and technologies") but contains no concrete actions or verbs describing what the skill actually does. Anchor 2 ('names the domain but actions are minimal or generic') is the closest fit; not 3 because even one or two concrete actions are absent, and not 1 because the domain and coverage are specifically enumerated.

Completeness

There is a clear 'what' ("Apple Human Interface Guidelines as 14 agent skills covering platforms, foundations, components, patterns, inputs, and technologies") but no 'Use when...' clause or equivalent explicit trigger guidance anywhere in the description, which per judging guidelines caps completeness at 3. Not 4 because the 'when' is entirely absent rather than merely improvable.

Trigger Term Quality

Natural terms users would say are present: "Apple Human Interface Guidelines" plus all five platforms (iOS, macOS, visionOS, watchOS, tvOS). Not 5 because common synonyms and variations are missing (e.g. "HIG", "SwiftUI", "UI guidelines", "app design"); not 3 because coverage of the primary platform names is good rather than partial.

Distinctiveness Conflict Risk

"Apple Human Interface Guidelines" names a clear niche with distinct triggers for iOS, macOS, visionOS, watchOS, and tvOS, giving minimal conflict risk with other skills. Not 4 because the enumerated platform list makes overlap with non-Apple design skills unlikely; the only slightly generic term is "human interface".