Conciseness

The body is dense and assumes competence — no concept explanations, every section carries non-obvious interpretive judgment (e.g., "A silent or changing hop is an observation, not proof that the hop is broken"). It falls just short of anchor 5 because the non-mutation constraint is stated three times (intro, "When to Use", "Safety and Boundaries") and a few sentences restate the flow diagram, i.e., minor instances that could be trimmed — anchor 4.

Actionability

Every step ships a complete, executable, bounded command: `ping -c 5`, `scutil --dns`, `dig +time=2 +tries=1`, `traceroute -n -q 1 -m 20`, `nettop -n -L 3 -p`, and a full copy-paste-ready `curl -sS -w '...' --connect-timeout 5 --max-time 15 '<url>'` invocation, with placeholders clearly marked. This matches anchor 5.

Workflow Clarity

The sequence is explicit (symptom → LAN → DNS → reachability → app activity → timing → assessment, mirrored by numbered steps 1-6) with real validation checkpoints: stop-early guidance, Observed/Inferred/Unknown evidence labeling, "Return exactly one primary category", conflict handling ("prefer inconclusive"), and a structured incident result format. This is a read-only diagnostic workflow, so the destructive-operation validation cap does not apply. Anchor 5 fits.

Progressive Disclosure

The body is a genuine overview (workflow, evidence rules, output format, safety) while per-command interpretation, ambiguity cases, and worked examples are split into `references/details.md`, which exists, is referenced exactly once, clearly signaled ("Read `references/details.md` for command-by-command interpretation, ambiguity handling, intermittent-failure guidance, and worked examples"), and is one level deep — `details.md` contains no nested references. Anchor 5 fits the actual bundle structure.

Specificity

The description names the domain and several concrete capability areas — "Isolate local-LAN, DNS, upstream-path, and remote-service/application fault domains with built-in, non-destructive tools" — but stops at the fault-domain level without naming the actual diagnostic actions or tools (e.g., ping, DNS queries, path tracing, HTTP timing). It fits anchor 4 (several specific actions, minor gaps) rather than 5, which expects a comprehensive enumeration of concrete actions, and is clearly above anchor 3 (only 1-2 concrete actions).

Completeness

Both halves are explicit: an explicit "Use this skill when..." clause enumerating four concrete trigger scenarios, followed by a clear what-it-does statement ("Isolate local-LAN, DNS, upstream-path, and remote-service/application fault domains with built-in, non-destructive tools"). This matches anchor 5 exactly; nothing is merely implied.

Trigger Term Quality

Strong natural trigger phrasing with variations — "an API or MCP service times out or disconnects", "DNS resolution is failing or inconsistent", "video calls or other interactive traffic show packet loss or latency" — which are phrases users would genuinely say. It falls short of anchor 5's comprehensiveness because common user phrasings like "no internet", "network is slow", "Wi-Fi keeps dropping", or "site is down" are absent, but it is well above anchor 3's partial keyword coverage.

Distinctiveness Conflict Risk

A clear, narrow niche — active macOS connectivity failure triage that isolates fault domains diagnostically without remediation — with trigger terms (timeouts, disconnects, DNS, packet loss) that are unlikely to fire for unrelated skills. Anchor 5 fits: distinct triggers, minimal conflict risk.