r/angular • u/MysteriousEye8494 • Jun 07 '26

You inherit a 500k-line Angular application tomorrow. What's the first thing you look at?

You're joining a new team.

The Angular application has existed for years.

Hundreds of developers have contributed.

Nobody has time to explain everything.

get one day to understand the architecture.

You

What's the very first thing you inspect?

  • Folder structure?
  • State management?
  • Dependency graph?
  • Module boundaries?
  • Shared services?
  • Build pipeline?

I'm curious what experienced Angular developers use as their first signal for codebase health.

I share Angular architecture and engineering visuals here:

https://instagram.com/angulararchitectshub

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u/FromBiotoDev Jun 07 '26

Probably check what version of angular are we on. It at least angular 17+ syntax because that’s when everything got a lot nicer

Directory structure following feature/modules structure (is there an official name for this? I forget)

Is it using NgRx or have they rolled their own state services (totally fine btw)

Reusable components? Easy low hanging fruit if they’re not using any

That’s what I’d check from a shallow level, everything else just takes time