The body is lean and assumes Claude's competence — it avoids defining what Apex, SOQL, or SAST are, jumps straight to executable commands and tables, and every section earns its tokens; it matches the score-3 'lean and efficient' anchor rather than the padded score-2 example.

Provides fully executable, copy-paste-ready commands and code — 'pmd check -d . -R category/apex/security.xml -f sarif -r pmd-apex.sarif', a complete custom-ruleset XML, a GitHub Actions YAML job, and an Apex suppression example — matching the score-3 anchor rather than the pseudocode score-2 example.

Seven sequentially numbered steps with explicit validation checkpoints — 'Verify' after install, exit-code-4 gate semantics with 'continue-on-error: false', suppression-with-justification feedback loop, and an Anti-patterns table of error recovery — matching the score-3 anchor with feedback loops for the batch/destructive CI context.

The body is a clear overview that pushes the full 10-rule detail to a single one-level-deep, clearly signaled reference ([references/apex-security-rules.md](references/apex-security-rules.md), a real file confirmed in ./references/), matching the score-3 anchor of well-signaled one-level references rather than inline bloat (score 2) or nested chains (score 1).

Lists multiple concrete actions — 'Runs PMD's built-in Apex security ruleset', 'configures custom rulesets', 'emits SARIF for GitHub Code Scanning upload', 'integrates pmd check as a PR-blocking CI gate' — matching the score-3 anchor of multiple specific actions rather than the single-action score-2 example.

Explicitly answers both what (runs/configures/emits/integrates the Apex security ruleset) and when ('Use when the codebase contains Salesforce Apex and the team needs SAST coverage'), which matches the score-3 anchor; a missing Use-when clause would have capped it at 2, but the trigger is present.

Covers natural terms users would say — 'Salesforce Apex', 'SOQL injection', 'ApexSOQLInjection, ApexCRUDViolation, ApexSharingViolations', 'SAST coverage' — matching the score-3 anchor of good coverage of natural terms; it is not merely technical jargon (score 1) nor partial (score 2).

Has a clear niche (PMD Apex security) with distinct triggers tied to Salesforce Apex and named Apex security rules, and explicitly distinguishes itself from sibling semgrep/sonarqube skills, so it is unlikely to conflict — matching the score-3 anchor rather than the overlapping score-2 example.