Conciseness

The body is lean with no explanations of concepts Claude already knows, but the Rules section restates content from the numbered steps (e.g., restart requirements in step 6 reappear as a rule, and blocked/stopped dispositions from step 5 are repeated). This matches anchor 4 (minor instances that could be trimmed) rather than anchor 5's every-token-earns-its-place.

Actionability

As an instruction-only skill it gives concrete, prescriptive guidance: named modes, specific dispositions (blocked vs stopped), explicit restart preconditions, and referenced field names (engagement_scope_ref, GateDecision). It fits anchor 4 rather than 5 because common cases lack a worked example (e.g., a sample GateDecision emission) and some application detail lives only in the reference file.

Workflow Clarity

The six-step sequence is clear with explicit validation checkpoints: "Evaluate fresh ActionRequest and emit GateDecision immediately before each active action", pre-dispatch vs running failure dispositions, and restart discipline requiring fresh proofs and a new attempt. Error recovery and gating are explicit throughout, matching anchor 5; anchor 4 would understate the presence of per-action validation and feedback loops.

Progressive Disclosure

The body is a clear overview with a well-signaled, verified one-level reference (references/runtime-authorization-matrix.md exists and holds the detailed matrix). It matches anchor 4 rather than 5 because the Structure tree claims evals/evals.json which is absent from the bundle, and two references point to files outside the bundle (../cyber-evidence, ../cyber-lab-validation) that cannot be verified.

Specificity

"Validates cyber exercise authorization, scope, exclusions, runtime controls, expiry, stop and restart gates" lists several specific validation targets with only minor coverage gaps. It falls short of anchor 5 because it enumerates object areas rather than multiple fully concrete actions, and exceeds anchor 3 since it covers well more than 1-2 actions.

Completeness

It explicitly answers both "what" (validates authorization, scope, exclusions, runtime controls, expiry, stop/restart gates) and "when" ("Use when planning or reviewing authorized security activity, scope drift, or unsupported execution environments") with concrete trigger phrases, matching anchor 5. Anchor 4 is ruled out because the "when" clause is explicit and specific rather than merely adequate.

Trigger Term Quality

The "Use when planning or reviewing authorized security activity, scope drift, or unsupported execution environments" clause supplies good natural keyword coverage. A few natural terms are missing (e.g., penetration test, red team, rules of engagement appears only in metadata triggers, not the description), so it fits anchor 4 rather than 5 and is clearly above anchor 3's partial coverage.

Distinctiveness Conflict Risk

"Cyber exercise authorization" is a clear niche with distinct triggers (scope drift, stop/restart gates, unsupported execution environments) and minimal conflict risk with unrelated skills. It matches anchor 5; anchor 4's minor-overlap framing would understate how narrowly scoped the trigger set is.