Conciseness

The body is lean and assumes Claude's competence: no basic-concept explanations, no padding, and every section (Quick Reference, When to Use, Workflow Overview, Key Commands, Report Output) instructs rather than describes. Matches the 'lean and efficient; every token earns its place' anchor.

Actionability

Key Commands provides concrete, mostly copy-paste-ready templates (curl/npm view tarball extraction, diff -rq, two grep variants), matching 'mostly executable guidance with minor gaps'. It is not 5 because step 10 ('Post the full report as a PR comment via gh pr comment') never shows the actual command, e.g. 'gh pr comment <PR> --body-file <report>'.

Workflow Clarity

The 10-step Workflow Overview is clearly sequenced from identification through report posting, with verification present (step 7 'Trace each call site to verify argument usage and compatibility'). It stops short of 5 because validation checkpoints are implicit rather than explicit — no 'only proceed when X' gates or error-recovery loops — and the report-writing step has no defined pass/fail check.

Progressive Disclosure

The Quick Reference table cleanly signals three one-level-deep references (review-workflow.md, report-template.md, example-report.md) with descriptions of what each contains, and all three files exist in the bundle. The body stays an overview while details live in the reference files, matching the 'clear overview with well-signaled one-level-deep references' anchor.

Specificity

The description names the domain ('package version upgrades') and three concrete actions ('diffs source between versions, traces call sites, and generates compatibility reports'), matching the 'several specific actions; minor gaps' anchor. It falls short of 5 because coverage is incomplete — e.g., nothing about npm/registry specifics, lockfile changes, or where the report goes.

Completeness

The 'what' is clear (reviews upgrades via diffing, tracing, and reporting), but there is no 'Use when...' clause or equivalent explicit trigger guidance in the description, which per the judging guidelines caps completeness at 3. It is not 2 because the 'what' is concrete rather than vague.

Trigger Term Quality

'package version upgrades' and 'compatibility reports' are relevant keywords, but common natural variations users would say — 'Dependabot', 'Renovate', 'dependency', 'version bump', 'lock file' — are missing from the description (several appear only in the body, which is not the evaluation target). Matches the 'some relevant keywords but missing common variations or synonyms' anchor.

Distinctiveness Conflict Risk

'Reviews package version upgrades — diffs source between versions' carves out a clear niche that is unlikely to trigger for unrelated skills, matching 'mostly distinct; minor overlap risk'. The generic opening verb 'Reviews' leaves minor overlap risk with general code-review skills, so it does not reach 5.