# adding-analytics

Guides the AI agent in setting up PostHog analytics, page view tracking, feature flags, and session replay across web apps.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 371 installs · ★ 866
- Author: spencerpauly
- License: CC0-1.0 · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/spencerpauly/awesome-cursor-skills/tree/HEAD/resources/adding-analytics/SKILL.md
- Updated: 2026-08-02
- HTML: https://affpapa.org/en/nevibecode/skills/adding-analytics

## What it does

The skill inspects configuration files like `next.config.*`, `vite.config.*`, or `package.json` to detect the framework. It covers Next.js, React, Vue, and Svelte. For backend telemetry, it installs `posthog-node` or the Python `posthog` package.

The agent creates an initialization module, such as `app/providers.tsx` with `PostHogProvider` for Next.js App Router or an initialization hook in `_app.tsx`. In single-page applications, route changes trigger manual `$pageview` captures. It also sets up feature flags through `isFeatureEnabled` and configures session recording.

You must provide `NEXT_PUBLIC_POSTHOG_KEY` and host settings in `.env`. In monorepos, install the client dependency directly into the UI package rather than the root workspace. Projects with a Content Security Policy must explicitly allow `posthog-js` endpoints.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add spencerpauly/awesome-cursor-skills --skill adding-analytics -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/adding-analytics/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/adding-analytics/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add spencerpauly/awesome-cursor-skills --skill adding-analytics -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/adding-analytics/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add spencerpauly/awesome-cursor-skills --skill adding-analytics -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/adding-analytics/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install spencerpauly/awesome-cursor-skills adding-analytics
```

2. **Manually: put the files in place**
- File: `.github/skills/adding-analytics/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add spencerpauly/awesome-cursor-skills --skill adding-analytics -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/spencerpauly/awesome-cursor-skills --path resources/adding-analytics
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/adding-analytics/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add spencerpauly/awesome-cursor-skills --skill adding-analytics -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/spencerpauly/awesome-cursor-skills/tree/HEAD/resources/adding-analytics/SKILL.md

## When to use it
- integrate PostHog into Next.js or React applications
- track single-page app route changes manually
- wire custom event handlers for user actions
- enable session replay and PostHog feature flags

## Example prompts
- Add PostHog analytics to our Next.js App Router project
- Track signup button clicks as custom PostHog events
- Set up session replay and feature flags using PostHog

## Source text · SKILL.md · CC0-1.0

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````text
---
name: adding-analytics
description: Add PostHog analytics to a web application, including event tracking, page views, feature flags, and session replay.
---

# Add Analytics (PostHog)

Use this skill when the user asks to add analytics, event tracking, page views, feature flags, or session replay to a web application.

## Steps

1. **Detect the framework** — check for `next.config.*`, `vite.config.*`, `package.json` scripts, or `index.html` to determine if this is Next.js, React (Vite/CRA), Vue, Svelte, or plain HTML.

2. **Install the SDK**

   - Next.js / React: `npm install posthog-js`
   - Next.js (server-side): `npm install posthog-js posthog-node`
   - Python: `pip install posthog`
   - Node.js backend: `npm install posthog-node`

3. **Create a provider / init module**

   - For Next.js App Router, create `app/providers.tsx`:

     ```tsx
     "use client";
     import posthog from "posthog-js";
     import { PostHogProvider as PHProvider } from "posthog-js/react";
     import { useEffect } from "react";

     export function PostHogProvider({ children }: { children: React.ReactNode }) {
       useEffect(() => {
         posthog.init(process.env.NEXT_PUBLIC_POSTHOG_KEY!, {
           api_host: process.env.NEXT_PUBLIC_POSTHOG_HOST ?? "https://us.i.posthog.com",
           capture_pageview: false, // we capture manually for SPAs
         });
       }, []);
       return <PHProvider client={posthog}>{children}</PHProvider>;
     }
     ```

   - Wrap `{children}` in the root layout with `<PostHogProvider>`.

   - For Pages Router, init in `_app.tsx` inside a `useEffect`.

4. **Add page-view tracking** — for SPAs, create a component that calls `posthog.capture('$pageview')` on route change using the framework's router events.

5. **Add `.env` variables** — prompt the user for their PostHog project API key and host:

   ```
   NEXT_PUBLIC_POSTHOG_KEY=phc_...
   NEXT_PUBLIC_POSTHOG_HOST=https://us.i.posthog.com
   ```

   Add these keys to `.env.example` as well.

6. **Add custom events** — if the user specifies events to track (e.g. sign-up, purchase), add `posthog.capture("event_name", { ...properties })` calls in the relevant handlers.

7. **Feature flags (optional)** — if requested, show how to use `posthog.isFeatureEnabled("flag-name")` or the `useFeatureFlagEnabled` hook.

8. **Session replay (optional)** — enable by adding `session_recording: { maskAllInputs: false }` to the init config if requested.

## Notes

- Never hardcode API keys — always use environment variables.
- Add `posthog-js` to the Content Security Policy if the project has one.
- For monorepos, install in the package that renders the UI, not the root.
````
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© spencerpauly · CC0-1.0 · https://github.com/spencerpauly/awesome-cursor-skills/tree/HEAD/resources/adding-analytics/SKILL.md

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