As web developers, we rarely get to play with raw automotive hardware. But when I started messing around with my Tesla's CAN bus network to monitor FSD performance metrics, I realized the software ecosystem for tracking these hardware mods was non-existent. Most enthusiasts rely on static PDFs or outdated forum wikis.

To fix this, I built FSD CAN Mod Tracker (fsdcanmod.com). I wanted it to be incredibly lightweight, responsive on mobile (crucial when you're working inside a car), and highly structured.

The Tech Stack

I chose SvelteKit for the frontend because of its lightning-fast load times and reactivity. The app parses and displays complex telemetry mappings, configuration profiles, and hardware compatibility lists.…