Conciseness

The ~30-line body is lean with zero padding: no explanation of what SwiftData is, no restating known concepts; every line either sets constraints ("Target Swift 6.2 or later") or routes to a reference. Every token earns its place.

Actionability

The review process is concrete and executable — each step names an exact file ("references/predicates.md") gated on checkable conditions ("If the project targets iOS 18+"). It is not anchor 5 because no inline example or quick-start snippet is present; all substantive guidance is deferred to the reference files, leaving minor gaps if a reference is not loaded.

Workflow Clarity

A clear 5-step conditional review sequence with explicit gating (CloudKit usage, iOS 18+, iOS 26+) and partial-work guidance ("If doing partial work, load only the relevant reference files"). Not anchor 5 because there are no validation checkpoints or guidance on how to prioritize and report findings after checking each reference.

Progressive Disclosure

SKILL.md is a pure overview; all five referenced files (core-rules, predicates, cloudkit, indexing, class-inheritance) exist in references/ and are one level deep, clearly signaled both in the numbered process and the topic table, making navigation easy.

Specificity

Names the SwiftData domain and six concrete topic areas ("autosave, relationships, dangerous predicates, CloudKit constraints, indexing, class inheritance"), exceeding the 1-2 actions of anchor 3. It falls short of anchor 5 because topics are listed as nouns rather than framed as comprehensive concrete actions.

Completeness

Explicitly answers both questions: the "what" is the enumerated SwiftData pattern areas, and the "when" is a concrete trigger phrase — "Use when writing, reviewing, or debugging SwiftData code" — matching the anchor 5 example structure exactly.

Trigger Term Quality

Includes natural terms users would say — "SwiftData", "CloudKit", "writing, reviewing, or debugging" — giving good keyword coverage. Not anchor 5 because synonyms (e.g., "@Model", "persistent model") and file extensions are absent.

Distinctiveness Conflict Risk

"SwiftData" is an unambiguous niche trigger that would not naturally fire for other skills, and the enumerated subtopics reinforce the clear niche with minimal conflict risk.