Conciseness

Every line is a directive or spec — env precedence chain, Zod-at-startup rule, "install (always --frozen-lockfile in CI)", exact Cache-Control values, the curl verification one-liner. No concept explanations, no padding; assumes Claude's competence. Matches the lean anchor-5 example.

Actionability

Mostly executable: exact header values in a table, "return 401 unless the authorization header equals Bearer ${process.env.CRON_SECRET}", "curl -sI https://example.com | grep -E 'HTTP|Strict'", and a concrete rollback preference (platform promote over "git revert -m 1 HEAD && git push"). Not 5 because "full architecture, env vars, cron jobs, caching headers" and the CSP inventory are deferred to references, leaving the actual env-var list and cron-job definitions absent from the body.

Workflow Clarity

CI stages are explicitly ordered ("install → lint → test → production build → deploy"), the release gate is a checklist ("lint + test + build all exiting 0 and no draft PRs"), and rollback is a feedback loop ("rolled back immediately, not patched forward... re-run the curl -sI check before calling it resolved"). Destructive release/rollback operations do have validation and re-verification, so the cap does not apply.

Progressive Disclosure

Sections are well organized and the body is short, but the two deferral pointers are unresolvable: ".opencastle/stack/deployment-config.md" — the designated home for "full architecture, env vars, cron jobs, caching headers" — does not exist in the bundle (no references/, scripts/, or assets/ directories), and the **security-hardening** skill reference is external/unverifiable. Matches anchor 3 (references present but the organization leaves deferred content inaccessible); not 4 because a signaled-but-missing reference is a real navigation failure, not a minor gap.

Specificity

Five concrete verb+object actions — "Configures deployment pipelines, manages environment variables, schedules cron jobs, applies security headers, implements caching strategies" — comprehensively cover the skill's domain at the same concreteness as the anchor-5 example. Not 4 because no material coverage gap is evident relative to the body's topics.

Completeness

Explicitly answers both questions: the "what" is the five named actions and the "when" is the "Use when working with..." clause with concrete trigger terms. Matches the anchor-5 example structure exactly.

Trigger Term Quality

"Use when working with Docker, Vercel, AWS, Dockerfile, nginx.conf, or platform deployment configs" gives good coverage including concrete file names, but misses natural variations like "CI/CD", "GitHub Actions", "deploy", or "environment variables". Not 5 because synonym coverage is incomplete; not 3 because the included terms are ones users actually say.

Distinctiveness Conflict Risk

Platform-specific triggers (Docker, Vercel, AWS, Dockerfile, nginx.conf) carve out a mostly distinct niche, but "applies security headers" overlaps with a closely related security-hardening domain the body itself defers to. Not 5 due to that overlap risk; not 3 since the infra triggers are specific.