Conciseness

The body is directive throughout with no explanation of concepts Claude already knows, but there is repeated material: 'Every SVG must explain structure, flow, comparison, or decision logic' appears in both SVG Diagram Policy ('Avoid decorative SVGs. Every SVG must explain...') and Style Rules ('Every diagram must explain...'), and the SVG safety rules (no JavaScript/foreignObject/external assets) are stated in the SVG Diagram Policy and restated in the Validation Checklist. Efficient with minor trimming opportunities — a 4, not a 5, and far from the noticeable padding of a 3.

Actionability

Highly actionable for a writing skill: a copy-paste article skeleton, a concrete comparison-table template with exact column headers, exact Markdown image syntax, and precise SVG requirements (xmlns, viewBox, width, height, title, desc). A few details remain underspecified — how to derive '<article-slug>' from a Chinese title, and the course outline to 'link back to' is referenced without a location — so it sits at 'mostly executable guidance with minor gaps' rather than fully covering the common cases.

Workflow Clarity

The 8-step Workflow has an explicit validation step ('Validate logic, examples, citations, Markdown rendering, relative image links, and SVG visibility'), the Output section mandates 'Do not save until the article has passed the validation checklist', and a full 16-item Validation Checklist closes the loop before saving. This matches the 5 anchor: clear sequence with explicit validation and a checkpoint before the final write.

Progressive Disclosure

No bundle files exist (no references/, scripts/, or assets/), so everything lives in a single ~220-line SKILL.md. Section structure is clean and navigable (Overview, Inputs, Output, Workflow, Article Structure, Topic Guidance, SVG Diagram Policy, Validation Checklist), but content such as the full article skeleton, the comparison table template, or the per-topic coverage guidance could be offloaded to reference files to keep the main file leaner — good structure with minor organization gaps, i.e., a 4.

Specificity

Concrete actions and attributes are named — 'Write Chinese "数据库筑基课" Markdown articles', 'rigorous, SVG-rich, practice-oriented GitHub-renderable Markdown article saved as a .md file', with a defined audience (architects, DBAs, application developers). It is largely one verb ('write') qualified by output characteristics rather than the multiple distinct concrete actions of a 5, so 4 fits: specific with minor coverage gaps.

Completeness

Both halves are explicit: the 'what' is 'Write Chinese "数据库筑基课" Markdown articles... rigorous, SVG-rich, practice-oriented GitHub-renderable Markdown article saved as a .md file', and the 'when' is a full 'Use when the user provides a database foundation article title and references... and wants...' clause with concrete triggers. This matches the 5 anchor's what-and-when with concrete trigger phrases.

Trigger Term Quality

The 'Use when' clause enumerates natural inputs users would mention: 'technical docs, product manuals, open-source repositories, DeepWiki pages, papers, source code, or related blog posts' plus 'database foundation article title'. Coverage is good but misses some common phrasings and synonyms (e.g., 'write an article', '翻译', Chinese phrasings, .md), so it fits 'good keyword coverage; a few natural terms missing' rather than comprehensive.

Distinctiveness Conflict Risk

The distinctive series name (数据库筑基课), Chinese-language requirement, database-domain focus, and SVG-rich/GitHub-renderable output constraints give it a clear niche with minimal overlap with generic writing or documentation skills. Triggers (title + reference materials provided) would not naturally fire for other skills.