Conciseness

The body is efficient — a selection table, terse output rules, and a 6-step workflow with no explanation of concepts Claude already knows. Not 5 because a few lines justify rather than instruct ("The value of this skill is that the output stays editable, reviewable, and renderable from Markdown", "Prefer a clear, accurate first version over decorative complexity") and the Delivery section partially restates the Workflow.

Actionability

Mostly executable guidance: a concrete install command (`npx skills add markdown-viewer/skills`), an explicit goal→renderer mapping table, and an exact code-fence-to-renderer mapping. Not 5 because the core instruction — read the upstream skill for syntax — never shows even one example artifact block, and the upstream skill paths are never named, so a fresh agent can't execute step 3 without external installation; well above the 3 anchor's pseudocode-level guidance.

Workflow Clarity

A clear 6-step sequence with a validation checkpoint: "Check syntax before delivery: matching fences, valid JSON/YAML where required, PlantUML starts and ends correctly, and labels are readable". Not 5 because there is no error-recovery loop (what to do when the check fails) and the delivery reporting list is a checklist without verification; not 3 because the checkpoint is explicit and concrete, unlike the 3 anchor's merely-implied validation.

Progressive Disclosure

Sections are well-organized, but the body's key reference — "read the corresponding upstream `SKILL.md` for exact syntax and pitfalls" — points at files that do not exist in this bundle (no references/, scripts/, or assets/ directories) and gives no paths or links, so navigation to the detailed material is not actionable. This matches the 3 anchor ("references present but not clearly signaled") and is below 4, where references would be mostly clear and resolvable.

Specificity

Quotes several concrete actions — "Create rich diagrams, data visualizations, technical architecture views, and editorial content cards directly in Markdown" — plus named renderers (PlantUML, Vega, JSON Canvas). Not 5 because "rich" and "polished" introduce mild puffery and the action list stops short of full coverage (e.g., no mind map or timeline creation verbs); not 3 because well more than 1-2 concrete actions are named.

Completeness

Explicitly answers both questions: the "what" ("Create rich diagrams, data visualizations, technical architecture views, and editorial content cards directly in Markdown") and the "when" ("Use for Mermaid-like diagram requests, PlantUML architecture diagrams, Vega charts, JSON Canvas maps, infographics, UML, cloud/network/security/data/IoT diagrams, and polished Markdown documentation visuals") with concrete trigger phrases, matching the 5 anchor.

Trigger Term Quality

Good natural-term coverage: "diagram requests", "architecture diagrams", "charts", "infographics", "UML", "cloud/network/security/data/IoT diagrams" — phrases users would actually say. Not 5 because it misses common synonyms and extensions users plausibly say ("flowchart", "mind map", "timeline", "roadmap", ".puml", ".md") and "Mermaid-like" is a roundabout way to say "Mermaid".

Distinctiveness Conflict Risk

The niche — Markdown-native diagram/visualization rendering via a specific skill pack with named renderers — is distinct, and renderer-specific triggers (Vega, PlantUML, JSON Canvas) disambiguate well. Not 5 because generic triggers like "data visualizations" and "documentation visuals" overlap with general charting/dataviz skills; clearly above the 3 anchor's "could still overlap with similar skills" given how many renderer-specific triggers are present.