The body is lean and prescriptive (e.g., 'Width: 1px; use 2px only for large hero cards', 'Opacity: keep most stops below 0.4; subtle beats shiny') with no padding explaining CSS or gradient concepts Claude already knows.

Three complete, copy-paste-ready patterns are provided: a full .gradient-border CSS block, a masked ::before pattern with mask-composite code, and a Tailwind arbitrary-property string.

As a simple single-purpose styling skill, the single action is unambiguous, and the 'Quick Checks' section supplies concrete validation checkpoints (no double border, exact radius match, accessible focus states); no destructive/batch feedback loop is required.

No bundle files exist and the body is well-organized into clearly signaled sections (Use When, Defaults, Simple CSS Pattern, Masked Pattern, Tailwind Shortcut, Taste Rules, Quick Checks), so progressive disclosure is satisfied through organization alone.

Names the domain ('gradient-border treatments for premium web surfaces') and the concrete action 'Apply', but gives a single primary action rather than a list of multiple distinct actions, so it is comprehensive-incomplete rather than fully specific.

It explicitly answers what ('Apply subtle gradient-border treatments for premium web surfaces') and when ('Use when cards, pricing panels... need a refined edge highlight'), with an explicit 'Use when' trigger clause.

The 'Use when' clause lists a broad set of natural UI surface terms users would actually mention ('cards, pricing panels, nav bars, modals, buttons, or hero surfaces'), giving strong keyword coverage.

The narrow niche of gradient borders tied to specific premium UI surfaces has distinct triggers and is unlikely to fire for unrelated skills.