Conciseness

The body is dense, telegraphic and free of basic-concept padding ('Names only.', 'A workflow that doesn't parse can't be reasoned about; fix that first'), so it clears anchor 3's 'some unnecessary explanation'. It stops short of anchor 5's 'every token earns its place': the ~320-line body carries long multi-sentence worked examples inside the Step 6 verdict table, an eight-skill cross-reference list that substantially repeats the 'Not for' lines, an elaborate Output Format template, and time-sensitive dates inline ('Since 8 December 2025 ...', 'CVE-2025-30066', 'Ultralytics (December 2024)') rather than quarantined in a dated section, which the rubric says should penalize conciseness.

Actionability

Guidance is copy-paste ready throughout: 'rg -n' inventory greps matching trigger names like pull_request_target and workflow_run, 'zizmor --offline --format=json .', 'actionlint -format '{{json .}}'', seven exact 'gh api ... --jq' reads, exact fingerprint formats with six examples, a full ext-keys table, and 'node references/validate-findings.mjs findings.json'. Common cases get worked verdict examples ('pr-preview.yml runs on pull_request_target, checks out github.event.pull_request.head.sha ...'). This matches anchor 5; nothing is the pseudocode or high-level-hint shape of anchors 2-3.

Workflow Clarity

Six explicitly sequenced steps (Inventory → Run the tools → Who can trigger it → Checks → Platform facts → Verify, then record) with real validation checkpoints: fix parse failures before reasoning ('A workflow that doesn't parse can't be reasoned about'), a mandatory refutation step before any verdict, JSON validation via 'node references/validate-findings.mjs findings.json', and re-run feedback ('a rejected record stays rejected unless the line in ruled_out_by.location changed'). The 12-class checklist and inventory-as-coverage-record match anchor 5's checklists and feedback loops; anchor 4's 'minor validation gaps' does not apply.

Progressive Disclosure

Scored against the actual bundle: all ten files cited from the body (checks.md, ai-agents-in-ci.md, gitlab-circleci.md, findings-format.md, verification.md, severity-calibration.md, worked-examples.md, validate-findings.mjs, to-sarif.mjs, findings.schema.json) exist in references/, are one level deep, and each citation states its purpose ('Each class below has its grep, the attacker-controlled contexts, safe shapes and GitLab/CircleCI equivalents in references/checks.md'). The only non-resolving mentions (validate-coverage.mjs, ai-prompt-injection-via-ci.md) sit in shared bundle files explicitly scoped to other skills or in an attribution note, so navigation for this skill is unbroken — matching anchor 5 rather than anchor 4's 'minor organization gaps'.

Specificity

Concrete capabilities are listed comprehensively: 'pull_request_target and workflow_run running untrusted code, expression injection into run steps, missing or broad workflow permissions, third-party actions not pinned to a commit SHA, OIDC trust policies with wildcard subjects, self-hosted runners on public repos ... cache and artifact trust between workflows, and AI agents in CI', plus the concrete actions 'Runs zizmor and actionlint read-only and writes findings.json'. This matches anchor 5 (multiple specific concrete actions, comprehensive coverage) rather than anchor 4, which still allows 'minor gaps in coverage'; nothing here is the generic 'Processes data' vagueness of anchor 1-2.

Completeness

Both halves are explicit: what it does ('Audit CI/CD pipelines ... for the paths that give an outsider code execution, secrets or a write token ... Runs zizmor and actionlint read-only and writes findings.json') and when to use it ('Use when the user mentions 'pull_request_target,' ... or needs to secure a build pipeline'). This is exactly the anchor-5 pattern of the rubric's own good example, with concrete trigger phrases; anchor 4 would require the 'when' to be less explicit.

Trigger Term Quality

Fourteen quoted natural triggers cover jargon ('pull_request_target,' 'pwn request,' 'workflow injection'), tool names ('zizmor,' 'actionlint,' 'claude-code-action'), practitioner phrases ('pin actions to SHA,' 'GITHUB_TOKEN permissions,' 'self-hosted runner'), a plain-English question ('is this workflow safe'), and platform variants ('GitLab CI security,' 'CircleCI security'). Coverage including synonyms matches anchor 5; it does not fall to anchor 4's 'a few natural terms missing' because the only near-miss ('GitHub Actions' as a quoted phrase) is still prominent in the opening sentence.

Distinctiveness Conflict Risk

The niche is unambiguous — CI/CD pipeline authorization auditing with triggers like 'pull_request_target,' 'zizmor,' and 'OIDC trust policies with wildcard subjects' — and adjacent concerns (package vulns, leaked secrets, prompt injection in a product chatbot) are excluded from scope by the opening framing. Distinct triggers and minimal conflict risk match anchor 5 rather than anchor 4's 'minor overlap risk with closely related skills.'