rune-ext-analytics

Create a typed analytics wrapper that queues events until consent is granted, then flushes them to providers like GA4 or PostHog. Denied consent discards the queue, and a server-side sendBeacon proxy recovers events lost to ad blockers.

Use a two-proportion z-test formula with baseline conversion rate, minimum detectable effect, power of 0.8, and alpha of 0.05. The Skill provides a requiredSampleSize function that returns the per-variant count needed before results become meaningful.

Plausible suits privacy-first lightweight tracking, PostHog covers full product analytics with funnels and feature flags, and Mixpanel focuses on event-based user analytics. The Skill supports all four providers including GA4 through a common typed event taxonomy.

Funnel steps usually fail to correlate because step events lack a shared flow ID tying them to one user journey. Generate a flow ID at funnel entry, pass it through every step event, and validate correlation in the aggregation query.

Dashboards freeze when raw events are sent to the browser for client-side aggregation. Pre-aggregate with SQL DATE_TRUNC and window functions server-side, paginate time series with keyset cursors, and lazy-load off-screen charts.

Assign variants deterministically by hashing the user ID combined with the experiment ID, then persist the assignment in a cookie. This guarantees consistent variant exposure and keeps experiment results valid.