Conciseness

Roughly 50 lean lines with no padded explanations or concepts Claude already knows; even tips are one-liners ('Size the container with CSS; the globe fills its parent element.'). Every token earns its place, matching the level 5 anchor rather than level 4's minor over-explanation.

Actionability

Two executable quick-start snippets (ESM and CDN script tag) with real API calls ('.globeImageUrl(myImageUrl)', '.pointsData(myData)'). However, 'Common layers to mention' is a bare name list with no layer-specific fields (e.g. arcsData, pointRadius, polygonsData) despite the workflow promising 'layer-specific fields'. Not level 3 (code is executable, not pseudocode) and not level 5 (common cases beyond points are uncovered).

Workflow Clarity

Four clearly sequenced steps (confirm environment, minimal snippet plus layer fields, extras only if requested, sizing/performance callouts) plus a 'Questions to ask when specs are missing' clarification checkpoint. This is a non-destructive guidance task so no validation loop is needed, and the simple-skill exception applies.

Progressive Disclosure

Single-file skill with no references/scripts/assets bundle to verify, well-organized sections, and no buried or nested references. Per the guideline that skills under 50 lines with no need for external references can score 5 on well-organized sections alone.

Specificity

Names the domain and several concrete actions ('setup, data layers (points, arcs, polygons, labels), and integration patterns in plain HTML or React'), with minor gaps such as no method-level API terms. It is not level 3 (more than 1-2 actions) nor level 5 (coverage is not comprehensive).

Completeness

Explicitly answers both what ('implementing globe.gl... including setup, data layers..., and integration patterns in plain HTML or React') and when ('Use when implementing globe.gl (Globe.GL) for 3D globe data visualization...') with concrete trigger phrases. Not level 4 because the when-clause is fully explicit rather than merely present.

Trigger Term Quality

Good natural keyword coverage: 'globe.gl', 'Globe.GL', '3D globe data visualization', 'WebGL/ThreeJS', 'points, arcs, polygons, labels', 'React'. A few natural variations are missing (e.g. 'earth', 'world map', 'react-globe.gl'), so it falls just below the comprehensive-synonym level 5.

Distinctiveness Conflict Risk

Clear niche naming a specific library (globe.gl) with distinct triggers; minimal conflict risk with other visualization skills. Matches the level 5 anchor rather than level 4, which implies overlap with closely related skills.