The body is dense, domain-specific audit guidance (grep patterns, fix recipes, severity tables) with no padding explaining concepts Claude already knows; every section is operational rather than descriptive, matching the lean score-3 anchor and not the padded score-1 or could-be-tightened score-2 anchors.

It supplies concrete executable grep patterns ('actor ', 'Task\s*\{', 'Task\.detached'), specific fix snippets ('Task { [weak self] in ... }'), and named commands ('xcsym crash --format=summary <file>'), meeting the copy-paste-ready score-3 anchor rather than the pseudocode or abstract score-2/score-1 anchors.

Phases 1-5 are explicitly sequenced with verification checkpoints such as 'use Read to verify the surrounding context before reporting' and 'Require evidence from the Phase 1 map - don't speculate without reading the code', satisfying the score-3 explicit-validation anchor rather than the sequence-with-gaps score-2 anchor.

The skill is well-organized into clear phases but is a monolithic ~230-line SKILL.md with no bundle files; the detailed 8-pattern catalog, compound-finding tables, and full output template are inline content that could be split into reference files, matching the score-2 'some structure, content that should be separate is inline' anchor rather than the score-3 split-with-references anchor.

Names the domain ('Swift 6 compliance, data race prevention') and vague activities ('concurrency checking', 'async code review') but never states concrete capability actions the skill performs such as detecting anti-patterns or flagging missing @MainActor, so it lands above the vague score-1 anchor but below the multi-concrete-action score-3 anchor.

The description gives an explicit 'when' ('Use when the user mentions...') but entirely lacks a 'what does this skill do' capability statement; the score-1 anchor explicitly covers 'Missing what OR when', and the strong trigger clause does not rescue the absent what.

Phrases like 'Swift 6 compliance', 'data race prevention', and 'async code review' are natural terms a Swift developer would actually say, giving good coverage comparable to the score-3 anchor rather than the jargon-only or partial-variation anchors.

Swift-specific triggers give it a niche, but the generic terms 'concurrency checking' and 'async code review' could plausibly fire for non-Swift or general code-review skills, matching the score-2 'somewhat specific but could still overlap' anchor rather than the clearly-non-conflicting score-3 anchor.