Agent skill

posthog-instrumentation

Automatically add PostHog analytics instrumentation to code. Triggers when user asks to add tracking, instrument events, add analytics, or implement feature flags in their codebase.

View SKILL.md on GitHub Repository
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Install this agent skill to your Project

npx add-skill https://github.com/PostHog/posthog-for-claude/tree/main/skills/posthog-instrumentation

SKILL.md

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

  1. Identify the framework (React, Next.js, Python, Node.js, etc.)
  2. Check for existing PostHog setup
  3. Add appropriate instrumentation

Code Patterns

JavaScript/TypeScript

javascript
// 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

python
from posthog import Posthog
posthog = Posthog(api_key='<ph_project_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

jsx
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

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