Product Analytics - Instrumentation & Measurement OS

Modern Best Practices (January 2026): PostHog-first, session context registration, strict event naming, North Star activation events, privacy-first attribution.

Primary sources live in data/sources.json. If web search is available, refresh time-sensitive details against official docs before giving definitive advice.

No fluff. Only executable steps, templates, and checklists.

When to Use This Skill

• Event taxonomy design: Naming conventions, event hierarchy, property structure
• Tracking plan creation: What to track, where, and why
• Marketing attribution: UTM capture, campaign tracking, source attribution
• Activation metrics: Defining and measuring user activation
• Retention analysis: Cohort analysis, churn prediction, engagement scoring
• Platform setup: PostHog, Pendo, Amplitude, Mixpanel, Heap configuration
• Data quality: Event validation, debugging, governance