Claude Code v2.1.88 — Full Source

Source code extracted from @anthropic-ai/claude-code@2.1.88 npm package via source maps.

The 57MB source map (cli.js.map) shipped inside the npm package and pointed to a Cloudflare R2 bucket containing the full TypeScript source. No reverse engineering was performed — Anthropic published it themselves.

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Quick Start

Requirements: Node.js 18+

git clone https://github.com/antonoly/claude-code.git
cd claude-code
node cli.js

On first launch, you'll be prompted to log in with your Anthropic account. If you have a Claude Max/Pro subscription, it works immediately — no API key needed.

With an API Key

export ANTHROPIC_API_KEY=sk-ant-...
node cli.js

With AWS Bedrock

export CLAUDE_CODE_USE_BEDROCK=1
export AWS_REGION=us-east-1
node cli.js

With Google Vertex AI

export CLAUDE_CODE_USE_VERTEX=1
export CLOUD_ML_REGION=us-east5
node cli.js

Custom API Endpoint

export ANTHROPIC_BASE_URL=https://your-proxy.example.com
export ANTHROPIC_API_KEY=your-key
node cli.js

With Local Models (Ollama, LM Studio)

Claude Code uses the Anthropic Messages API format. To use local models, run litellm as a translation proxy:

# Terminal 1: Start litellm proxy
pip install litellm
litellm --model ollama/llama3.1:8b --port 8080

# Terminal 2: Point Claude Code at the proxy
export ANTHROPIC_BASE_URL=http://localhost:8080
export ANTHROPIC_API_KEY=not-needed
node cli.js

Works with any model Ollama supports — llama3.1, codellama, deepseek-coder, mistral, etc.

With OpenAI / GPT Models

# Via litellm proxy
litellm --model openai/gpt-4o --port 8080

# Or any OpenAI-compatible endpoint (Codex, GPT-5.4, etc.)
litellm --model openai/o3 --port 8080

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What's Inside

Stat	Value
Lines of TypeScript	512K
Source files	1,923
Built-in tools	43
Package version	2.1.88

Key Findings

• buddy/ — Full Tamagotchi pet system: 18 species, rarity tiers (1% legendary, 0.01% shiny legendary), 5 stats, gacha PRNG seeded per-user, ASCII art sprites
• utils/undercover.ts — Auto-activates on public repos. Injects system prompt: "Do not blow your cover." No force-OFF switch
• outputStyles/ — Anti-distillation defenses: strips tool lists, model info, and thinking content to prevent competitors from scraping behavior
• coordinator/ — KAIROS/Auto-Dream: autonomous multi-step planning with self-reflection loops
• context/ — 4-layer context compression: pruning → summarization → truncation → eviction

Source Tree

├── cli.js              # Bundled CLI entry point (12MB)
├── package.json        # Original npm package metadata
├── vendor/             # Native binaries (ripgrep, audio-capture)
├── buddy/              # BUDDY pet system
├── tools/              # 43 built-in tools
├── commands/           # Slash commands
├── components/         # React/Ink terminal UI
├── context/            # Context window management
├── coordinator/        # Multi-agent orchestration
├── hooks/              # Pre/post tool execution hooks
├── plugins/            # Plugin/skill marketplace
├── services/           # API clients, auth, billing
├── skills/             # Built-in skills
├── utils/              # Undercover mode, anti-distillation, models
│   ├── undercover.ts   # "Do not blow your cover"
│   └── model/          # Model definitions, codename stripping
├── voice/              # Voice mode
└── vim/                # Vim keybindings

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Full Analysis

Independent architecture analysis with source code evidence:

verified-skill.com/insights/claude-code

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Disclaimer

This repository contains source code that was publicly exposed via npm source maps on March 31, 2026. All code was directly readable from the published npm package @anthropic-ai/claude-code@2.1.88. No reverse engineering, decompilation, or circumvention of technical protection measures was performed.