Conciseness

Every line earns its place: a one-sentence role statement, a five-item checklist, a compact output template, four rules, and a dense safety block — no explanations of concepts Claude already knows and no padding, matching the anchor-5 lean example.

Actionability

For an instruction-only skill the guidance is fully actionable: a copy-paste-ready output template with enumerated verdicts (APPROVE | REJECT | ESCALATE_HUMAN), concrete checks ("no disabled tests, skipped assertions, or commented-out checks"), and an explicit fallback ("If you cannot run tests (env issue) → ESCALATE_HUMAN").

Workflow Clarity

The process is a numbered validation checklist with explicit checkpoints (all must pass for APPROVE), a feedback loop for error recovery (REJECT requires numbered reasons plus a suggested next step for the implementer), and an escalation path — matching the anchor-5 pattern. No destructive/batch cap applies since the skill reviews rather than mutates.

Progressive Disclosure

This is a simple, single-purpose skill of roughly 50 lines with no need for external references, and its sections (role, Inputs, Checklist, Output, Rules, Untrusted input) are clearly organized, so it earns 5 under the simple-skill exception. The only path mentioned, scripts/sync-untrusted-input.mjs, sits in a maintainer's HTML provenance comment rather than serving as content navigation.

Specificity

"Finds reasons to reject. Runs tests. Confirms diff scope." lists several concrete third-person actions in the verification domain, but coverage has a minor gap — the escalate-to-human capability central to the skill body is not mentioned, so it matches anchor 4 rather than the comprehensive coverage of anchor 5.

Completeness

The description explicitly answers both questions: what ("Independent verification agent for loop-produced changes. Finds reasons to reject. Runs tests. Confirms diff scope.") and when with concrete trigger phrases ("Use after minimal-fix or any implementer sub-agent"), matching anchor 5; the when-clause is specific and unconditional, well above the anchor-4 case where 'when' could be more explicit.

Trigger Term Quality

Keywords like "verification", "tests", "diff scope", "reject", "implementer sub-agent", and "minimal-fix" give good natural-term coverage for this domain, but common synonyms such as "verify", "review", or "check the changes" are missing, matching anchor 4 rather than the comprehensive synonym coverage of anchor 5.

Distinctiveness Conflict Risk

It carves a clear niche — post-implementation verification of loop-produced changes in a maker/checker split — with a distinct negative trigger ("never in the same role as the implementer"), giving minimal conflict risk with other skills, matching anchor 5.