Conciseness

The body is lean and directive with zero concept explanations — "Determine whether the implementation solves the stated problem. Be adversarial about evidence. Stay inside the task's scope." assumes Claude's competence throughout. The read-only constraint is stated several times ("Remain read-only. Never edit code, tests, plans, or state.", "Never edit or write.", "Do not edit the controller database."), which is minor repetition that could be trimmed, matching anchor 4 rather than 5.

Actionability

Guidance is fully executable for an instruction-only skill: exact blocked conditions ("If the model matches the work model, return `blocked`"), exact output contract ("Return only the `factory.review.v4` template in references/output.md. Do not emit a JSON object. Do not wrap the result in a Markdown fence."), and exact protocol handling ("call `subagent_done` once", shutdown-reply behavior). No gaps; every branch has a concrete instruction.

Workflow Clarity

A clear three-stage sequence — isolate the session, review the task, return the verdict — with explicit validation checkpoints up front (model mismatch, mutation tools present, missing packet/diff each produce a named `blocked` outcome) and an error-recovery protocol for the shutdown edge case. Not a destructive/batch operation, so no validation cap applies.

Progressive Disclosure

The body is a clean overview with well-signaled, one-level-deep markdown links to references/reviewer-prompt.md, references/code-quality.md, and references/output.md, all of which exist. Scored against the actual bundle: references/review-contract.md is only reachable via a second hop from reviewer-prompt.md and is never linked from SKILL.md, and scripts/review-packet.py (plus its test) is orphaned with no navigation path — minor organization gaps that fit anchor 4 rather than 5.

Specificity

"Adversarially review one ready-for-review ticket task", "in a read-only Pi subagent using a model different from the worker", and "return a structured markdown findings list and a verdict" list several concrete actions with only minor gaps (what the review covers — behavior, acceptance criteria — is left to the body). It exceeds anchor 3's "1-2 concrete actions" but falls short of anchor 5's comprehensive coverage.

Completeness

The what is explicit (adversarial review in a read-only, model-different subagent returning findings plus verdict) and a "Use only for the review stage" clause supplies the when. This matches anchor 4 (both present, when could be more explicit or specific — e.g. no concrete trigger phrases like "when a ticket task is marked ready-for-review"), not anchor 5.

Trigger Term Quality

Natural keywords like "review", "ready-for-review", and "ticket task" are present, but the description leans on pipeline jargon ("Pi subagent", "the worker") and misses common variations users would say, such as "review the diff/change" or "re-review after fixes". It fits anchor 3's "some relevant keywords but missing common variations or synonyms" better than anchor 4's "good keyword coverage".

Distinctiveness Conflict Risk

"Use only for the review stage; it never edits code or applies its own findings" plus the read-only and different-model constraints carve out a clear niche with distinct triggers, separating it from general code-review and fix/apply skills with minimal conflict risk.