Conciseness

The body is a lean transformation table ('this.state / this.setState -> useState()', 'componentDidMount -> useEffect(() => {}, [])') plus three copy-paste validation commands, with zero explanation of React/TypeScript concepts Claude already knows. This matches anchor 5 (lean and efficient, every token earns its place) — there is nothing to trim, so 4's 'minor instances of over-explanation' does not apply.

Actionability

Concrete pattern mappings cover every common class-component feature (lifecycle, bindings, HOCs, Redux connect) and the validation block is executable as-is. Minor gaps keep it at anchor 4 rather than 5: step 4 'Apply composition pattern if there is prop drilling' and step 5 'Decompose if > 200 lines' give no how, and there is no complete converted-component example.

Workflow Clarity

A clear numbered sequence (read spec, analyze, convert, compose, decompose, validate) ends with an explicit validation step of three concrete commands. It falls short of anchor 5 because there is no error-recovery feedback loop (what to do when tsc or the build fails); the anchor-3 cap does not apply since validation is present.

Progressive Disclosure

The skill is 36 lines, single-task, with no bundle files and no content that belongs in separate references; per the rubric's simple-skill note it can score 5 with well-organized sections alone. The '## Steps' structure is clean and the one external pointer (docs/ARCHITECTURE.md section 5) is clearly signaled and one level deep.

Specificity

The description names the domain ('component needs migration to the target architecture or framework version') but lists no concrete actions — nothing about class-to-functional conversion, TypeScript, hooks, or state-management migration. It sits between anchor 1 (entirely vague) and anchor 2 (domain named, actions minimal/generic); it is not vague enough for 1 and lacks the 1-2 concrete actions required for 3.

Completeness

The 'when' is explicit ('Use when a component needs migration to the target architecture or framework version') but the 'what' is missing entirely — the description never states what the skill does. Per the anchors this is 'only when is present without what' (anchor 2, example 'Use when working with documents'); it cannot reach 3, which requires a clear 'what'.

Trigger Term Quality

Terms like 'component', 'migration', and 'framework version' are plausible user phrasings, but common natural variations are missing: 'class component', 'functional component', 'hooks', 'React', 'TypeScript', 'upgrade', 'rewrite'. This matches anchor 3 (some relevant keywords but missing common variations) — better than the one-or-two generic keywords of anchor 2, short of the good coverage of anchor 4.

Distinctiveness Conflict Risk

'Component' and 'migration' give it some specificity, but 'target architecture or framework version' is undefined and broad, creating overlap risk with other migration/upgrade skills (API migrations, framework upgrades, non-React migrations). Matches anchor 3 (somewhat specific but could still overlap with similar skills) rather than 4's 'mostly distinct' or 2's 'very broad'.