Conciseness

The body is mostly efficient and project-specific (no explanations of concepts Claude already knows), but it carries clear waste: a checkbox "Quality checks" section ("Keyboard fits in 518px…", "No JS — pure HTML/CSS…") that substantially duplicates the later detailed "Quality Checks" section, and an "Output" table that restates what steps 4–5 of the workflow already said. This matches "mostly efficient but could be tightened" rather than level 4, which presumes only minor trims.

Actionability

Guidance is fully executable: a copy-paste `require('./generate')` call with concrete options and defaults (`suggestions: ['"He"', 'Hey', 'Heating']`, `layout: 'qwerty-lower'`), a runnable CLI (`node render.js --out /tmp/kb.html`), exact output shapes, and concrete behavioral specs like "passing `'<b>'` … yields `&lt;b&gt;` …, never raw markup". Specific examples cover the common cases, matching the level-5 anchor.

Workflow Clarity

The 7-step workflow is clearly sequenced (require → pick layout → pass suggestions → receive fragment → inject CSS → animate externally → optional preview), and the "Quality Checks" section provides explicit validation (single root element, exact DOM order, escaping behavior, 518px footprint, no `<script>`), while "Failure Modes" gives symptom→fix recovery loops (e.g., unknown `layout` fallback, missing CSS → ENOENT). This is a non-destructive single-purpose skill whose sequence plus checklist plus error recovery matches the level-5 anchor.

Progressive Disclosure

Section structure is clean and the Files table clearly signals one-level-deep references (`generate.js`, `render.js`, `templates/keyboard.css`), but none of those files exist in the bundle (no references/, scripts/, or assets/ directories are present), so the navigation targets are unresolvable. Combined with inline duplicated quality-check content that should be consolidated, this fits "some structure but could be better organized" rather than level 4, which requires references to be mostly clear and resolvable.

Specificity

"Render a static iOS QWERTY keyboard as inline HTML+CSS sized for the 750-wide 9:16 stage" names a concrete deliverable, and the description enumerates the full component inventory ("3-suggestion bar, alpha keys, shift/backspace, 123/emoji/space/return row, and the bottom globe+mic strip") plus an explicit non-goal ("No animation logic"). Coverage of what the render includes is comprehensive for its narrow domain, matching the level-5 anchor; it is above level 4 because nothing in scope is left as a minor gap.

Completeness

The "what" is clear and concrete (render a static iOS QWERTY keyboard as HTML+CSS), but there is no "Use when…" clause or equivalent explicit trigger guidance anywhere in the description — the pairing context with mockup molecules lives only in the body. Per the judging guideline, a missing explicit trigger clause caps completeness at 3.

Trigger Term Quality

"iOS QWERTY keyboard", "suggestion bar", and "HTML+CSS" are natural phrases a user would say when needing this skill, giving good keyword coverage. It falls short of level 5 because common variations like "iPhone keyboard", "typing", "texting", or "message mockup" are absent, leaving a few natural terms missing.

Distinctiveness Conflict Risk

"Render a static iOS QWERTY keyboard as inline HTML+CSS sized for the 750-wide 9:16 stage" carves out a clear niche (a static keyboard fragment, explicitly not an interactive component) with distinct triggers and minimal overlap with sibling mockup-page skills. It clearly fits the level-5 anchor rather than level 4, which implies residual overlap with closely related skills.