Conciseness

The body is mostly efficient — terse file-based discovery steps, question checklists, and a copy-paste template with no explanations of concepts Claude already knows. However, it contains unnecessary padding: the trailing "## When to Use — This skill is applicable to execute the workflow or actions described in the overview" is meaningless boilerplate, the promotional footer adds no instructional value, and "Check for .claude/apple-design-context.md before asking questions" duplicates the line above it. This lands on 'mostly efficient but includes some unnecessary... or could be tightened' rather than 4.

Actionability

Guidance is highly concrete for an instruction-only skill: named files to inspect (README.md, Package.swift/.xcodeproj, Info.plist, Assets.xcassets), a ready-to-use question bank, and a fully specified markdown template. It sits at 4 rather than 5 only because a few steps remain high-level — e.g. "Grep for accessibility modifiers/attributes" names no actual modifiers or grep pattern, and no example commands are given for the discovery steps.

Workflow Clarity

The sequence is explicit and well-ordered: check for existing context → auto-discover from the repo → present findings and ask the user to confirm or correct → gather missing items → generate the document, plus a separate four-step update flow. The user-confirmation step is a real checkpoint, matching 'clear sequence with most checkpoints present'. It is not 5 because there is no final validation that the generated document is complete/consistent (e.g., verifying every template section was filled) before finishing.

Progressive Disclosure

With no bundle files present, the skill is judged as a self-contained body: it has clear hierarchical sections (Gathering Context, question categories, Template, Updating, Related Skills) and all content is one level deep. It scores 4 rather than 5 because at ~130 lines the question bank and document template are candidates for a references/ file, keeping the overview leaner — though the current organization is good and easy to navigate.

Specificity

The description names its domain ("shared Apple design context document") with two concrete actions ("Create or update") and a stated consumer ("other HIG skills use to tailor guidance"), matching the 'names domain and 1-2 concrete actions' anchor. It stays at 3 rather than 4 because it lists only two verbs and never says what the document contains or how it's used; it is not 2 because the actions are concrete on a specific artifact rather than generic.

Completeness

The 'what' is clear (create/update a shared context document), but 'when' is entirely absent — there is no "Use when..." clause or equivalent, capping completeness at 3 per the judging guidelines. It is not 4 because the timing is not even weakly stated as a condition, only implied through the purpose clause.

Trigger Term Quality

The only candidate keywords are "Apple design context" and "HIG skills" — a couple of domain terms with zero natural trigger phrases a user would say (no "Use when setting up HIG guidance", "Apple design context", "HIG", etc.). This matches the anchor 'one or two generic keywords; missing the natural phrases users say'; it is above 1 only because the terms are topically relevant rather than pure jargon or generic filler.

Distinctiveness Conflict Risk

The phrase "that other HIG skills use to tailor guidance" carves out a distinct setup/maintenance niche within the HIG skill family, so overlap risk with the sibling guidance skills (hig-platforms, hig-foundations, etc.) is minor — matching 'mostly distinct'. It falls short of 5 because the absence of any explicit trigger phrases means triggering depends entirely on interpretation of the 'what', leaving some conflict risk among closely related skills.