Content
78%Weight 40%Scale 1-5Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
The body is an exemplary lean, well-organized instruction set with a clear sequence and sensible guardrails, appropriate for a simple single-purpose skill. Its main weakness is actionability: steps state what to do without the concrete CSS/property-level details that would make them executable without guesswork.
Suggestions
Add a minimal HTML/CSS snippet showing the duplicated track, @keyframes, and translateX(0 to -50%) animation so the core loop is copy-paste ready.
Make vague steps concrete: specify flex-shrink: 0 (or fixed widths) for 'Keep item widths stable', and mask-image or a gradient overlay for 'Mask or fade the edges'.
Add a verification step, e.g., 'Confirm the first and last items align exactly at -50% so the loop has no visible seam.'
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The ~15-line body is lean with zero padding: no explanations of concepts Claude already knows, no library comparisons, and every line instructs or constrains. It matches anchor 5 ('every token earns its place') and is clearly above anchor 4, which would require trimmable over-explanation. | 5 / 5 |
Actionability | Steps like 'Animate the track with a linear transform from 0 to -50%' and 'Respect prefers-reduced-motion' are directionally concrete, but no property-level or code-level detail is given — no @keyframes snippet, no flex-shrink: 0 for stable widths, no mask-image/gradient for edge fading. This fits anchor 3 (some concrete guidance but incomplete, missing key details) rather than 4, since several steps leave the executable specifics unstated. | 3 / 5 |
Workflow Clarity | The six workflow steps are clearly sequenced and each names its purpose (duplicate, animate, stabilize widths, mask edges, hover behavior, reduced-motion fallback). It is below anchor 5 because there is no explicit validation step (e.g., verify the seam at -50% is invisible), but above anchor 3 since the sequence and most checkpoints are present — the operation is non-destructive, so the validation cap does not apply. | 4 / 5 |
Progressive Disclosure | The skill is under 50 lines, self-contained with no external references needed, and organized into clear sections (Use When, Workflow, Guardrails). Per the judging guidelines, skills under 50 lines with no need for external references can score 5 with just well-organized sections. | 5 / 5 |
Total | 17 / 20 Passed |