Conciseness

The body is lean — mode tables, numbered steps, one-line anti-patterns — and explains nothing Claude already knows. The one trim opportunity is duplication: the Workflow-by-Mode steps restate the exact file lists that the Required Reading by Mode table already carries. Efficient with minor instances that could be tightened, so 4 rather than 5.

Actionability

The in-body guidance is concrete (explicit gates like "gate the user before writing instrumentation", "PII gate... on every property before the diff is final", "Mark `deprecated` first, set a sunset date, then remove"), but nearly all executable detail is deferred to `rules/*.md` and `templates/*.md`, and 12 of the 14 referenced paths do not exist in the bundle. Every mode's first step ("Load rules/what-to-track.md") points at a missing file, leaving key implementation details unavailable — some concrete guidance but incomplete.

Workflow Clarity

Five modes each get a clear numbered sequence with explicit validation checkpoints: the plan-exists gate before instrumentation, the PII gate before the diff is final, downstream-consumer identification before deletion, and a Definition of Done checklist closing the loop. Remove mode's destructive risk is explicitly safeguarded (deprecate first, sunset date, update plan in same PR), so the destructive-operation cap does not apply.

Progressive Disclosure

The index design itself is excellent — one level deep, clearly signaled, organized by mode — but scored against the actual bundle: only `references/event-catalog.md` and `references/platforms.md` exist. All ten `rules/*.md` files and both `templates/*` files referenced throughout the body are dangling, so navigation leads to dead ends for 12 of 14 paths. The claimed structure is not realized on disk, which is as broken as buried or missing references.

Specificity

The description lists multiple concrete actions spanning the full lifecycle — "Decides what user interactions are valuable to capture, what's noise, what's PII to avoid, and how to implement, audit, update, and remove tracking code cleanly" — plus concrete coverage areas (event naming, property schemas, tracking plans, GDPR/CCPA/DPDPA compliance, named platforms). Coverage is comprehensive with no gaps, matching the 5 anchor rather than 4.

Completeness

Both what ("Guides product analytics and RUM event tracking... implement, audit, update, and remove tracking code") and when (the explicit "Triggers on..." clause with concrete phrases) are clearly stated, matching the 5 anchor. Third-person voice is used throughout ("Guides", "Decides", "Covers"), so no voice penalty applies.

Trigger Term Quality

An explicit trigger list of eight natural phrases users would actually say — "track this event", "add analytics", "what should I track", "is this PII", "tracking plan", "remove tracking", "audit analytics", "/rum-tracking" — covering synonyms across all five modes. Nothing significant is missing for the domain, so it fits the comprehensive 5 anchor over 4.

Distinctiveness Conflict Risk

A clear niche — product-analytics/RUM event tracking for React/Next.js and React Native/Expo — with named platforms (PostHog, Segment, Mixpanel, Amplitude, Datadog RUM, Sentry, OTel, Dash0) and analytics-specific triggers unlikely to fire for unrelated skills. Minor overlap with dedicated OTel instrumentation skills exists but the scoping to analytics events keeps conflict risk minimal.