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wtf is claude-code?

apeforest/claude-code — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2026-04-02

Audience · developerComplexity · 5/5MaintainedSetup · hard

TL;DR

An archived copy of Claude Code's leaked internal source, accidentally published via npm source maps, showing how Anthropic's AI coding assistant is built.

Mindmap

mindmap
  root((repo))
    What it does
      AI coding CLI
      Archived leaked source
      Runs terminal commands
    Tech stack
      Node.js
      JavaScript
      npm package
    Use cases
      Study AI agent design
      Learn multi-agent systems
      Research hidden features
    Audience
      Developers
      AI researchers
      Curious technologists
    Notable features
      Buddy pet system
      Undercover mode
      KAIROS background agent
      ULTRAPLAN offload

Code map

Detail Auto

An interactive map of this repo's files and how they connect — its source is parsed live in your browser. Click Visualize to build it.

filefunction / class

Why would anyone build with this?

REASON 1

Study how a production AI coding agent is architected internally.

REASON 2

Learn how multi-agent systems coordinate a fast agent with a background planner.

REASON 3

Explore how tool-calling frameworks expose 40+ capabilities to an AI.

REASON 4

Research undocumented features hidden in a leaked production codebase.

What's in the stack?

Node.jsJavaScriptCLI

How it stacks up

apeforest/claude-code0verflowme/alarm-clock0verflowme/seclists
Language—CSS—
Last pushed2026-04-022022-10-032020-05-03
MaintenanceMaintainedDormantDormant
Setup difficultyhardeasyeasy
Complexity5/52/51/5
Audiencedevelopervibe coderops devops

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · hard Time to first run · 1h+

Archived leaked source, not an installable package.

Yoink these prompts

Prompt 1
Walk me through how the main agent, KAIROS, and ULTRAPLAN divide work in this leaked Claude Code codebase.
Prompt 2
Summarize the tool-calling framework this repo reveals and how a bash executor or file editor tool would be implemented.
Prompt 3
Explain the background 'dream' memory-consolidation system described in this repo in plain English.
Prompt 4
List the biggest architectural takeaways from this leak for someone building their own AI coding assistant.

Frequently asked questions

wtf is claude-code?

An archived copy of Claude Code's leaked internal source, accidentally published via npm source maps, showing how Anthropic's AI coding assistant is built.

Is claude-code actively maintained?

Maintained — commit in last 6 months (last push 2026-04-02).

How hard is claude-code to set up?

Setup difficulty is rated hard, with roughly 1h+ to a first successful run.

Who is claude-code for?

Mainly developer.

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