Idriss Chebak idrisschebak

Inside the Claude Code source

Anthropic's Claude Code CLI source code leaked onto GitHub recently. All of it. About 1,900 files and a lot of TypeScript.

I read through the key modules. What follows is a breakdown of the surprising parts: how the system actually works, where Anthropic made clever engineering choices, and where their approach diverges from OpenAI's Codex in ways you wouldn't guess from using either tool.

Lifecycle of a request

Here's what happens when you type a message into Claude Code:

	import random, logging
	from datetime import datetime, timedelta, date
	class ProxiesRotation(object):
	"""docstring for ProxiesRotation"""
	def __init__(self, directory):
	super(ProxiesRotation, self).__init__()
	self.proxies = []
	self.forbidden_proxies = []
	self.directory = directory
	self.usedProxies = {}

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