Ask Claude to Explain Unfamiliar Code Patterns You Encounter in a Codebase

Every codebase has patterns you haven't seen before — a framework convention you're new to, a design pattern you can't name, or a technique that looks like magic. Instead of Googling fragments, point Claude at the code and ask it to teach you.

Explain this code in src/services/EventBus.ts. I don't understand the 
pattern being used — what design pattern is this, why was it chosen here, 
and how does data flow through it?

Claude reads the implementation, identifies the pattern (pub/sub, observer, mediator, etc.), and explains it in terms of your codebase — not a generic Wikipedia definition:

• What the pattern does in this specific context
• Why it was chosen over simpler alternatives
• How the other parts of the codebase use it
• When you'd add to it vs when to use something else

This works for all kinds of unfamiliar code:

# Framework magic
Explain how this Laravel service provider works. What's the lifecycle, 
when does register() run vs boot(), and why is it structured this way?

# Metaprogramming
What's happening in this Python metaclass? Walk me through what __new__ 
does here and why they didn't just use a regular class.

# Functional patterns
Explain the compose() and pipe() functions in src/utils/fp.ts. 
How do they work, and show me how they're used elsewhere in the codebase.

# Advanced TypeScript
What does this TypeScript generic do? Break down each type parameter 
and show me what concrete types it produces for the cases in this file.

The key advantage over documentation: Claude explains the pattern using your code as the example. You see how it's applied in the context you're actually working in, not in a toy example from a tutorial.

Every unfamiliar pattern is a learning opportunity — let Claude turn the code you're reading into a lesson you'll remember.

via Claude Code