The same five references are restated four ways (Quick Reference table, DOT decision tree, numbered list, Example Invocations) plus again in Critical Patterns, so it could be tightened; not a 1 because it avoids explaining concepts Claude already knows.

Routing guidance is concrete and copy-paste ready — exact paths like 'skills/swift-modern.md' and commands like '/axiom:audit swift-simplify' — which is fully actionable for a router skill.

The decision tree (DOT graph plus numbered if-then list) gives an unambiguous routing sequence, and the skill involves no destructive/batch operations that would require validation checkpoints.

The overview is well-signaled and references are one level deep, but the referenced files (skills/swift-modern.md, ownership-conventions.md, transferable-ref.md, deep-link-debugging.md, tvos.md) are absent from the bundle, so navigation cannot be completed; not a 3 because the disclosure chain is broken, not a 1 because structure and signaling are clearly good.

Lists multiple specific concrete actions ('reviewing Swift code for modern idioms', 'working with noncopyable types', 'implementing drag and drop', 'adding debug deep links', 'building for tvOS'), matching the multi-action anchor.

The explicit 'Use when ...' clause supplies the trigger and the enumerated gerund phrases convey what the skill does, answering both what and when.

Uses natural terms a Swift user would actually say ('modern idioms', 'noncopyable types', 'drag and drop', 'debug deep links', 'tvOS') with good coverage of phrasings.

Niches like noncopyable types, debug deep links, and tvOS are distinct and unlikely to fire for the wrong skill; not a 2 because the triggers are specific rather than merely 'somewhat specific'.