Conciseness

The intro paragraph ('Media queries respond to viewport width... making the component genuinely reusable in any layout context') and the Quick Reference bullets restate a CSS concept Claude already knows, and that same paragraph is duplicated verbatim as 'Why It Matters' in references/rule.md — so those tokens are spent twice. This matches anchor 3 ('mostly efficient but includes some unnecessary explanation or could be tightened'); it is not 2 because the body is genuinely short and the section scaffolding is lean, and not 4 because roughly a third of the body is over-explanation or duplication.

Actionability

The guidance is concrete and specific: 'Convert this component from media query-based to container query-based responsiveness using container-type and @container', 'Look for components in this CSS that have media query breakpoints', and 'Flag exact selectors, declarations, or breakpoints' name the exact constructs and outputs, with complete executable CSS one reference hop away. It matches anchor 4 ('mostly executable guidance... minor gaps') — not 5 because the body itself contains no minimal inline example (e.g. a two-line container-type + @container snippet) and the 'Explain' section only describes what to explain.

Workflow Clarity

A rough sequence is present (Check → Fix → Explain / Code Review), matching anchor 3 ('steps listed but validation gaps... checkpoints missing or implicit') — the skill's own description demands 'Check the rendered layout across breakpoints and interaction states before proposing a fix', yet no post-fix verification step appears in the body; verification guidance exists only in references/rule.md's Verification section. It is not 2 because the sections are well-defined and unambiguous, and not 4+ because the key checkpoint the description promises is absent from the body's own workflow.

Progressive Disclosure

The body is a clear overview with well-signaled, one-level-deep references: 'For full implementation details, code examples, and framework-specific guidance, see references/rule.md' — and references/rule.md exists, contains the details, and points no further. This matches the anchor-5 pattern (clear overview, well-signaled single-hop reference, easy navigation) and the rubric's note that short, well-organized skills can score 5 on structure alone; the minor quibbles (the pointer promises 'framework-specific guidance' that rule.md does not actually contain) are content-accuracy, not navigation, issues.

Specificity

The description lists several concrete actions — 'reviewing stylesheets, component styles, and responsive behavior', applying 'container queries for component-level responsiveness', and 'Check the rendered layout across breakpoints and interaction states before proposing a fix' — naming specific artifacts (selectors, breakpoints, rendered layout). It sits at the anchor-4 level ('several specific actions; minor gaps') rather than 5 because the core capability is embedded as a garbled rule title rather than stated as a clean action, and it is not below 3 since it goes well beyond naming a domain with 1-2 generic actions.

Completeness

Both halves are present: an explicit 'Use when reviewing stylesheets, component styles, and responsive behavior...' trigger clause, and a 'what' conveyed via 'Use container queries for component-level responsiveness' plus 'Check the rendered layout across breakpoints and interaction states'. It does not reach anchor 5 because the 'what' is not cleanly stated as a capability — the phrase 'related to Use container queries for component-level responsiveness' reads as a template artifact gluing the rule title into the sentence — but it is well above anchor 4's weaker cases since the 'when' is explicit and specific.

Trigger Term Quality

Natural trigger terms are present: 'stylesheets', 'component styles', 'responsive behavior', 'container queries', 'breakpoints', 'component-level responsiveness' — terms a user doing CSS review would plausibly say. It falls short of the anchor-5 'comprehensive coverage including synonyms and file extensions' because obvious variations like 'CSS', '.css', 'media queries', and 'responsive components' are missing, and it exceeds anchor 3's 'missing common variations' only partially.

Distinctiveness Conflict Risk

'Container queries' and 'component-level responsiveness' carve out a clear niche, but the trigger clause 'reviewing stylesheets, component styles, and responsive behavior' is broad enough to overlap with sibling CSS/responsive-review rules (e.g. media query or layout checklists). This matches anchor 4 ('mostly distinct; minor overlap risk with closely related skills') — not 5, since the opening trigger terms alone would fire for many CSS-review skills.