Conciseness

The body is dense and opinionated rather than padded — it explains nothing Claude already knows, and the tables (color palettes, font pairings, sizes) are non-obvious domain specifics that earn their tokens. However, there are minor instances of over-explanation: repeated exhortations in the '避免' section restate points already made ('不要创建纯文本幻灯片' repeats the '每张幻灯片都需要视觉元素' rule), and the 10-row palette table plus font tables are bulk inline content that could be trimmed or externalized. This fits 'Efficient; minor instances of over-explanation that could be trimmed' rather than the lean anchor 5.

Actionability

Reading, rendering, and verification are fully copy-paste ready: 'python -m markitdown presentation.pptx', 'python scripts/thumbnail.py presentation.pptx', 'python scripts/office/soffice.py --headless --convert-to pdf output.pptx', 'pdftoppm -jpeg -r 150 output.pdf slide', the placeholder grep, and a complete subagent prompt template. The gap keeping it below 5 is that the two primary workflows defer all executable detail — the editing workflow is only a high-level arrow sequence ('解包 → 操作幻灯片 → 编辑内容 → 清理 → 打包') with no commands, and the creation workflow is a bare pointer — and their targets (editing.md / pptxgenjs.md) are absent from the bundle, so the deferred guidance is unreachable. This fits 'Mostly executable guidance; concrete code or commands with minor gaps' rather than the incomplete/pseudocode anchor 3.

Workflow Clarity

The verification loop is exactly the anchor-5 pattern: generate → convert to images → check (with both a content check command and a visual-check subagent prompt) → list problems → fix → '重新验证受影响的幻灯片' → repeat until a full pass finds nothing new, plus the explicit gate '在完成至少一个修复-验证循环之前，不要宣布成功'. Checklists are provided (the 12-item visual-check list, the placeholder grep). Editing/packing validation is also present via scripts/office/validate.py in the bundle, and the workflow for the destructive unpack/edit/pack cycle has clear checkpoints. It is not below 5 because no validation gaps exist in the written workflows.

Progressive Disclosure

Structure and signaling are good — a quick-reference table routes each task to the right guide, references are one level deep, and scripts referenced in the body (thumbnail.py, office/unpack.py, office/soffice.py) all exist in the bundle. However, the two main workflow guides the body links to, [editing.md](editing.md) and [pptxgenjs.md](pptxgenjs.md), do not exist anywhere in the bundle (no references/ directory), so the primary navigation paths are broken. That lands at 'Some structure but could be better organized; references present but not clearly signaled' territory — the organization is better than that anchor, but the dangling references prevent the good-structure (4) or clear-overview (5) anchors, and a large design section sits fully inline.

Specificity

The description enumerates multiple concrete actions — '创建幻灯片、演示文稿或路旺材料' (create slides/presentations/pitch decks), '读取、解析或提取任何 .pptx 文件中的文本' (read/parse/extract text), '编辑、修改或更新现有演示文稿' (edit/modify/update), '合并或拆分幻灯片文件' (merge/split), plus handling '模板、布局、演讲者备注或批注' (templates, layouts, speaker notes, comments). This matches the anchor 'Lists multiple specific concrete actions; comprehensive coverage' — it is not the level-4 anchor because there are no meaningful gaps in coverage of pptx operations.

Completeness

Both questions are explicitly answered with concrete trigger phrases: what — the enumerated action list above; when — '当用户提到"演示文稿"、"幻灯片"、"PPT"或引用 .pptx 文件名时触发，无论他们之后打算如何使用内容'. This is the anchor-5 pattern (explicit 'what' plus explicit trigger 'when'), not level 4 where the 'when' would be less specific.

Trigger Term Quality

It covers natural user phrasing comprehensively with synonyms and the file extension: '演示文稿' (presentations), '幻灯片' (slides), 'PPT', and '引用 .pptx 文件名' (.pptx file names), plus the derived use case of extracting content for reuse in email or summaries. This matches the anchor-5 example pattern ('PDF files, PDFs, forms, document extraction, .pdf') and exceeds level 4, which only allows 'a few natural terms missing'.

Distinctiveness Conflict Risk

The niche is clearly bounded to .pptx files with distinct triggers (presentation/slide/PPT mentions and .pptx file names), closely mirroring the anchor-5 example 'Extract text and tables from PDF files... Use when working with PDF files or when the user mentions PDFs'. It is not level 4 because there is no meaningful overlap with adjacent skills — the scope deliberately covers all pptx operations in one place rather than sharing them with a sibling skill.