The body is a dense, table-driven reference that assumes Claude's competence (referencing config values and APIs without explaining basics) and avoids concept filler; only mild redundancy between inline anti-patterns and the summary table keeps it from being flawless.

As an instruction-only reference it gives concrete, specific guidance: exact config values (maxDiffPixels 50-200, threshold 0.2->0.3), named APIs (caret:'hide', page.waitForSelector), and copy-ready naming templates and breakpoint suffixes.

Decision workflows are clearly sequenced, including the explicit 'wait -> mask -> threshold' preference order, always/never rules for baseline updates, and a stability-based warn->block promotion checkpoint.

No bundle files exist; the skill is a self-contained catalog organized into clear, navigable section headers with no nested file references, which is appropriate for a compact single-file reference.

The description enumerates multiple concrete coverage decisions (which stories/pages get baselines, breakpoint choice, mask vs threshold, add/remove baselines, and an engine selection matrix), matching the 'lists multiple specific concrete actions' anchor.

It explicitly answers 'what' (a reference catalog for coverage decisions) and 'when' via the explicit 'Use when designing visual coverage for a new project or auditing an existing baseline set' trigger clause.

It uses natural terms a user would say for visual regression work (Percy, Chromatic, Playwright, Storybook, baselines, breakpoints, visual coverage), giving good coverage of engine names and core concepts.

It carves a clear 'which baselines / where' niche distinct from engine-specific 'how' skills, with specific engine triggers making overlap with unrelated skills unlikely.