Conciseness

The body is knowledgeable and mostly dense, but the composition rule is restated several times ('start with 3-4 support bands' in Preflight, the 'Composition starting point' bullet in Canvas Grammar, and again in Repair), and the font-size floors are explained twice with both Tailwind and inline-style spellings ('text-[32px] or style="font-size:32px"'). This fits 'mostly efficient but includes some unnecessary explanation or could be tightened' rather than score 4's 'minor instances', though it never drops to score 2's padded/explanatory level.

Actionability

Guidance is concrete and executable throughout: exact pixel floors (32px/28px/43px/21px), specific class and marker names ('flex flex-col', 'flex-1', 'data-ppt-density="high"', '@ppt-chart-height=N' aligned with 'h-[Npx]'), numeric budget ranges (72-128px padding, 240-420px hero, 80-240px bottom), a pattern lookup table, and a prioritized 4-step density resolution. For an instruction-only skill this fully satisfies the top anchor's 'specific examples cover the common cases'.

Workflow Clarity

There is a coherent sequence — numbered Preflight decisions, a numbered Poster Budget calculation, a Repair section with conditional fixes, and 'Before delivery, run references/checklist.md' as an explicit validation checkpoint — matching 'clear sequence with most checkpoints present'. It falls short of 5 because the phases live in separate sections with no explicit end-to-end order, and the repair guidance describes what to fix without a re-check loop after each fix (the checklist is run once, at the end).

Progressive Disclosure

The body is a genuine overview that offloads deep detail to two real, one-level-deep bundle files, each clearly signaled with purpose ('references/catalog.md - named poster-card patterns and 1200x1600 zone skeletons', 'references/checklist.md - P0/P1/P2 structural self-check'), plus a compact inline quick-lookup table. This matches the top anchor: clear overview, well-signaled references, easy navigation, no nested references.

Specificity

The description enumerates multiple concrete capabilities — 'poster-card layout, focal hierarchy, vertical section planning, evidence grouping, compact two-column pockets, chart/list budgeting' — which comprehensively mirror the body's actual content, matching the anchor 'lists multiple specific concrete actions; comprehensive coverage'. It sits above score 4 because coverage is broad rather than having minor gaps, and far above score 3's '1-2 concrete actions'.

Completeness

It explicitly answers 'when' with a concrete trigger clause — 'Must be read before creating, relaying out, or repairing 3:4 vertical Oh My PPT pages' — and 'what' with the enumerated layout capabilities and 'catalog and checklist references'. This matches the top anchor (both what and when with concrete trigger phrases) and exceeds score 4, whose 'when' is only serviceable; the 'Use when' cap does not apply because an equivalent explicit trigger clause is present.

Trigger Term Quality

Good keyword coverage: '3:4 vertical', 'Oh My PPT pages', 'poster-card', '1200x1600', and the action verbs 'creating, relaying out, or repairing' are phrases a user would plausibly say. It falls short of 5 because natural synonyms like 'portrait page', 'vertical slide/poster', or aspect-ratio variants are absent, matching 'good keyword coverage; a few natural terms missing' rather than comprehensive synonym coverage.

Distinctiveness Conflict Risk

The niche is unmistakable — '3:4 vertical Oh My PPT pages' pinned to a '1200x1600' canvas — giving it distinct triggers with minimal conflict risk against generic layout or presentation skills. It is not score 4, because the ratio, product name, and canvas dimensions together leave almost no overlap ambiguity with closely related skills.