PostHog Instrumentation Skill

Help users add PostHog analytics, event tracking, and feature flags to their code.

When to Use User asks to "add PostHog" or "add analytics" User wants to track events or user actions User needs to implement feature flags User asks about instrumenting their code Workflow Identify the framework (React, Next.js, Python, Node.js, etc.) Check for existing PostHog setup Add appropriate instrumentation Code Patterns JavaScript/TypeScript // Event tracking posthog.capture('button_clicked', { button_name: 'signup' })

// Feature flags if (posthog.isFeatureEnabled('new-feature')) { // Show new feature }

// User identification posthog.identify(userId, { email: user.email })

Python from posthog import Posthog posthog = Posthog(api_key='')

Event tracking

posthog.capture(distinct_id='user_123', event='purchase_completed')

Feature flags

if posthog.feature_enabled('new-feature', 'user_123'): # Show new feature

React import { usePostHog } from 'posthog-js/react'

function MyComponent() { const posthog = usePostHog()

const handleClick = () => { posthog.capture('button_clicked') } }

Best Practices Use consistent event naming (snake_case recommended) Include relevant properties with events Identify users early in their session Use feature flags for gradual rollouts