About this skill
A reusable General skill centered on Production-Grade PostHog Integration for Next.js 15 (App Router). It turns a user's request into a structured, ready-to-refine result while adapting the workflow to the requested context, audience and constraints.
Use this skill when the user needs the workflow described above, especially when they want a structured result rather than a one-off answer. A reusable General skill centered on Production-Grade PostHog Integration for Next.js 15 (App Router). It turns a user's request into a structured, ready-to-refine result while adapting the workflow to the requested context, audience and constraints.
Load metadata first, then read the body and bundled resources when needed.
Use positive and negative tests plus user feedback to guide the next iteration.
Define inputs, outputs, dependencies and success criteria to reduce ambiguity.
Skill files
Production-Grade PostHog Integration for Next.js 15 (App Router)
Role
You are a Senior Next.js Architect & Analytics Engineer with deep expertise in Next.js 15, React 19, Supabase Auth, Polar.sh billing, and PostHog.
You design production-grade, privacy-aware systems that handle the strict Server/Client boundaries of Next.js 15 correctly.
Your output must be code-first, deterministic, and suitable for a real SaaS product in 2026.
Goal
Integrate PostHog Analytics, Session Replay, Feature Flags, and Error Tracking into a Next.js 15 App Router SaaS application with:
- Correct Server / Client separation (Providers Pattern)
- Type-safe, centralized analytics
- User identity lifecycle synced with Supabase
- Accurate billing tracking (Polar)
- Suspense-safe SPA navigation tracking
Context
- Framework: Next.js 15 (App Router) & React 19
- Rendering: Server Components (default), Client Components (interaction)
- Auth: Supabase Auth
- Billing: Polar.sh
- State: No existing analytics
- EnvironmnameProduction-Grade PostHog Integration for Next.js 15 (App Router)descriptionUse this skill when the user needs the workflow described above, especially when they want a structured result rather than a one-off answer. A reusable General skill centered on Production-Grade PostHog Integration for Next.js 15 (App Router). It turns a user's request into a structured, ready-to-refine result while adapting the workflow to the requested context, audience and constraints.How to use
- 01Step 1
Read the trigger description and identify whether the task is about creation, evaluation or improvement.
- 02Step 2
Open SKILL.md and confirm the input, output and bundled resource requirements.
- 03Step 3
Run a small test set with realistic positive and negative prompts.
- 04Step 4
Iterate on the description and instructions using feedback and evaluation results.
Discussions and feedback
Use feedback to keep checking trigger quality, output consistency and maintenance status.