Conciseness

The body is mostly lean bullet-style guidance with no over-explanation of known concepts, but the 'Use When' section repeats the frontmatter description verbatim, 'Scope' overlaps it, and '## Workflow' is a completely empty header. That waste is more than anchor 4's 'minor instances that could be trimmed' but well short of anchor 2's pervasive padding.

Actionability

Concrete structural guidance is present ('border-gradient wrappers', 'border-x container lines', 'small corner squares', 'high-impact contrast block, then quieter index areas'), but nothing is executable to spec — no hex or RGB color values, font stacks, spacing scale, or code snippets. Anchor 3 ('some concrete guidance but incomplete, missing key details') fits; it exceeds anchor 2's high-level-hints level because specific patterns and treatments are named.

Workflow Clarity

This is a single-purpose aesthetic skill (no destructive/batch operations, so no hard cap), but the '## Workflow' section is literally empty and the guidance is thematic rather than sequenced — there is no build order and no checkpoints such as verifying contrast or readability. The simple-skill score of 5 requires an unambiguous single action with clear organization; the dead header and unordered guidance place it at anchor 3.

Progressive Disclosure

The body is under 50 lines, needs no external references, references none (no references/scripts/assets bundle exists), and is organized into cleanly headed sections (Use When, Scope, Visual target, Implementation guidance, Recommended patterns, Tuning knobs, Avoid). This matches the rubric's exception for short simple skills: well-organized sections alone earn a 5.

Specificity

Names the domain ('dark-blue clean design system') and concrete stylistic components ('cobalt gradient feature blocks', 'crisp framed structure', 'restrained premium glow'), but the only action is 'Create' — the remaining phrases are attributes of the output rather than capabilities. It does not list several distinct actions, so it sits at 'domain plus 1-2 concrete actions' rather than anchor 4.

Completeness

It clearly answers 'what' (create a dark-blue design system with the listed traits) but contains no 'Use when...' clause or equivalent explicit trigger guidance, which the judging guidelines cap at 3. This exactly matches anchor 3: clear 'what', 'when' missing.

Trigger Term Quality

Some natural terms are present ('dark blue', 'clean', 'contrast', 'gradient', 'premium'), but the phrases a user would naturally say are missing — 'dark mode', 'navy', 'landing page', 'hero section', 'blue theme'. Anchor 3 ('some relevant keywords but missing common variations or synonyms') is the closest fit; it is above anchor 2 because the included terms are domain-relevant, not generic.

Distinctiveness Conflict Risk

The niche is distinct — dark navy surfaces with cobalt contrast blocks, framed structure, and restrained glow clearly separates it from light sky-blue or neon sci-fi systems. Minor overlap risk remains with other generic dark-theme design skills because the description includes no negative triggers ('not dark mode dashboards', etc.), keeping it below anchor 5.