The body is largely efficient tool-specific guidance, but the Overview's corpus explanation ('a community-maintained YAML corpus of CVE, GHSA, and OSVDB advisories for RubyGems and Ruby runtimes'), the Differentiation-vs-npm-pip-maven-audit narrative, and the full worked-example output block could be tightened; not 3 because not every token earns its place, not 1 because it avoids explaining generic concepts Claude already knows.

Provides fully executable, copy-paste-ready commands — 'gem install bundler-audit', 'bundle-audit check --update --format json --output bundle-audit.json', the .bundler-audit.yml YAML block, and 'bundle update nokogiri' to 1.13.4 — with specific examples; not 2 because nothing is pseudocode or missing key details.

The worked example sequences scan → triage (patch reachable, suppress unreachable) → re-run offline → 'both findings resolved, exit 0, CI passes', giving an explicit re-run validation checkpoint, and the Anti-patterns table serves as a failure-mode checklist; not 2 because validation is explicit rather than implicit.

SKILL.md keeps install + first scan + quick suppression inline and points to a real, one-level-deep references/bundle-audit-ci.md (verified to contain the waiver template, Rake integration, and CI gating); not 2 because the split is well-signaled and shallow, with no nested references.

Lists multiple concrete actions — 'Installs and runs bundler-audit', 'updating the ruby-advisory-db corpus', 'scanning for vulnerable gem versions and insecure sources', 'suppressing false positives via .bundler-audit.yml', 'gating CI on non-zero exit' — matching the 'multiple specific concrete actions' anchor; not below 3 as it goes well beyond naming a domain.

Explicitly answers both 'what' (the concrete action list) and 'when' ('Use when a Ruby project has a Gemfile.lock and needs CVE/GHSA scanning or a CI SCA gate') with an explicit trigger clause; not 2 because the 'when' is stated, not merely implied.

'Use when a Ruby project has a Gemfile.lock and needs CVE/GHSA scanning or a CI SCA gate' supplies natural terms a Ruby developer would actually say (Ruby project, Gemfile.lock, CVE/GHSA scanning, CI SCA gate); not 2 because common variations are well covered rather than partial.

'Ruby-only SCA scanner: for other ecosystems use npm-pip-maven-audit... cargo-audit-rust is the Rust analog; ... reachability-analyzer downranks unreachable gems - not this' carves a clear niche and explicitly disambiguates sibling skills; not 2 because conflict risk is directly addressed rather than merely reduced.