Conciseness

The body is lean and table-driven with no explanations of concepts Claude already knows; constraints carry non-obvious justification ("added directly — never `@portaljs/components`"). Only trivial overlap exists between the Error Handling table and reference.md's troubleshooting, so it sits at the every-token-earns-its-place anchor rather than the minor-trimming one.

Actionability

Concrete, executable guidance throughout: "npm install recharts@^2.15.0", "npx tsc --noEmit", "npm run i18n:check", exact paths (components/Chart.tsx, pages/[owner]/[slug].tsx, locales/*.json), and three example invocations. However, the actual Chart.tsx code and gating JSX are delegated to an external GitHub URL ("the single source of truth"), so the bundle alone is not copy-paste complete — a minor gap that keeps it below the fully-executable anchor.

Workflow Clarity

Eight clearly sequenced steps with explicit validation checkpoints at both stages — "Validate that the X and every Y column exist in the data file's header" (step 3) and "Verify with `npx tsc --noEmit`" (step 7) — plus an explicit recovery loop ("Fix the first reported error before reporting success"). The operation is additive, so the destructive/batch cap does not apply, and it matches the feedback-loop anchor better than the minor-validation-gaps one.

Progressive Disclosure

Good structure: a single one-level-deep bundle reference (references/reference.md, verified to exist and to match its billing as a chart-type and prop reference) is clearly signaled in Resources, and sections are well organized. The gap is that the canonical full workflow lives at an external GitHub URL rather than in the bundle, so the most detailed layer of content sits outside the skill — good placement with a minor organization gap, not the fully self-contained split of the top anchor.

Specificity

"Installs recharts, writes a reusable Chart component, and renders it in the showcase Views section" lists multiple concrete actions covering the full workflow, and all five chart types ("line, bar, area, pie, or scatter") are enumerated. It matches the comprehensive-coverage anchor rather than the minor-gaps anchor below it.

Completeness

Both questions are answered explicitly: the what ("Installs recharts, writes a reusable Chart component, and renders it in the showcase Views section") and a concrete when ("Use when visualizing a dataset already registered in datasets.json"). The when-clause is specific rather than generic, so it fits the top anchor rather than the 4 anchor whose when is vague.

Trigger Term Quality

"chart", "visualizing", and the natural type names ("line, bar, area, pie, or scatter") are terms users would say, but common synonyms like "graph" or "plot" are absent. Good keyword coverage with a few natural terms missing — not the comprehensive synonym coverage of the top anchor.

Distinctiveness Conflict Risk

"a dataset's showcase in a PortalJS portal" and "datasets.json" carve a clear niche with distinct triggers and minimal conflict risk. The only overlap is with closely related sibling skills (e.g. portaljs-add-map), whose triggers differ, so the clear-niche anchor fits better than the minor-overlap anchor.