Conciseness

The ~50-line body is lean and assumes Claude's competence: no concept explanations, no padding — just scope resolution ("Resolve the repo dynamically; never hardcode it"), the six-step pipeline, hard gates, and agent names. Every section carries operational weight; the one apparent duplication (gates appearing in both the pipeline and Non-negotiables sections) adds distinct enforcement detail rather than restating, so it fits the 5 anchor better than the 4 anchor's "could be trimmed".

Actionability

Concrete, executable guidance dominates: exact input modes ("<PR number>", "--diff", "--files <a> <b> ..."), named agents ("security-paranoid-reviewer", "security-critical-reviewer"), and specific gates with enforcement rules ("re-dispatch the finder if not", "no finding ships at MEDIUM+ without a concrete, code-traced attack example"). Not a 5 because the actual execution mechanics (how to dispatch agents, exact commands) live in references/pipeline.md, so the body alone is not copy-paste ready — acceptable for a progressive-disclosure entry point, placing it at the 4 anchor's "minor gaps".

Workflow Clarity

The six-step pipeline is clearly sequenced with explicit validation checkpoints and a feedback loop: the coverage gate ("re-dispatch the finder if not. Do not advance with incomplete coverage"), the attack-example gate, and the verification step that independently re-traces every MEDIUM+ TRUE POSITIVE and drops what does not hold. This matches the 5 anchor (clear sequence, explicit validation, error-recovery loop); the destructive/batch cap does not apply since validation steps are present.

Progressive Disclosure

The body is a clear overview that delegates detail to three real, clearly signaled, one-level-deep references: "The canonical, authoritative procedure is in references/pipeline.md", plus references/coverage-inventory.md and references/findings-format.md — all verified to exist in references/. Each step that needs detail points to the right file, and no content that belongs in a reference is inlined; navigation is trivial. This matches the 5 anchor.

Specificity

The description names concrete capabilities — "running an adversarial security review of a code change — a GitHub PR, a local working-tree diff, or an explicit file list" and "wiring security review into a teamimplement run" — which are specific actions with enumerated input modes. It falls short of the 5 anchor because it describes scope and triggers rather than enumerating the concrete operations the skill performs (spawn finder/validator agents, coverage gate, write findings file).

Completeness

Both what and when are explicit: the what is "running an adversarial security review of a code change" with the three concrete scopes, and the when is given by two full "Use when..." clauses ("Use when running an adversarial security review..." and "Use when asked to security-review, audit, or vulnerability-assess freshly written or proposed code") with concrete trigger phrases. This matches the 5 anchor directly.

Trigger Term Quality

Natural trigger phrases are present: "security review", "audit", "vulnerability-assess", "PR", "diff", "code change" — a user asking to "security-review this PR" or "audit this change" would match. Not a 5 because common variations like "penetration test", "is this code secure", or "check for vulnerabilities" are absent, though the core synonyms are covered.

Distinctiveness Conflict Risk

The niche is clear — adversarial review of a code change with PR/diff/file-list inputs and teamimplement integration — making it mostly distinct with specific triggers like "adversarial security review" and "vulnerability-assess". Minor overlap risk remains with a generic security-review or code-review skill, since plain "security review" is a trigger either could claim; not a 5 for that reason.