Lightweight analytics integration

Lightweight Analytics Integration

This skill dictates the process of stripping massive analytics SDKs down to their absolute core REST/HTTP layers. It allows the integration of complex tracking systems into hyper-constrained environments (like Playable Ads) without blowing up the payload size.

When to Use

• Use when a client mandates a specific analytics provider (e.g., Mixpanel, Amplitude) but the official SDK exceeds 100KB.
• Use when tracking custom funnels directly via REST endpoints.
• NOT for standard web/mobile apps with no payload limits.

Core Process

Phase 1: SDK Deconstruction

• Do not use npm install <analytics-sdk>.
• Read the provider's REST API documentation directly.

Phase 2: The Custom HTTP Wrapper

• Write a 50-line custom wrapper utilizing the native fetch API.
• Construct the JSON payload exactly as the REST API expects it.
• E.g., fetch('https://api.amplitude.com/2/httpapi', { method: 'POST', body: JSON.stringify(payload) });

Phase 3: Session & ID Management

• Official SDKs handle UUID generation and session tracking automatically. You must implement this manually.
• Generate a lightweight UUIDv4 or use crypto.randomUUID().
• Store the session ID in local variables for the duration of the ad lifecycle.

Common Rationalizations

Rationalization	Reality
"I'll just import the core module of the SDK, it should be small."	Even core modules often bundle polyfills, heavy JSON parsers, and retry queues. A custom fetch wrapper is the only way to guarantee a < 5KB footprint.
"I don't need a session ID for these events."	Analytics dashboards cannot stitch together user journeys without a consistent Session ID or User ID sent with every custom HTTP request.

Red Flags

• package.json containing heavyweight analytics dependencies for a playable ad.
• Fetch wrappers failing to send a consistent session_id across multiple events.

Verification

Before finalizing the lightweight analytics integration:

• The integration bypasses the official NPM SDK in favor of a raw fetch or Image pixel.
• A custom Session ID is generated and attached to all events.
• The total byte footprint of the analytics script is under 5KB.