Claude-CN

free-code

The free build of Claude Code.

All telemetry stripped. All injected security-prompt guardrails removed. All experimental features unlocked. One binary, zero callbacks home.

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What is this

This is a clean, buildable fork of Anthropic's Claude Code CLI -- the terminal-native AI coding agent. The upstream source became publicly available on March 31, 2026 through a source map exposure in the npm distribution.

This fork applies three categories of changes on top of that snapshot:

1. Telemetry removed

The upstream binary phones home through OpenTelemetry/gRPC, GrowthBook analytics, Sentry error reporting, and custom event logging. In this build:

• All outbound telemetry endpoints are dead-code-eliminated or stubbed
• GrowthBook feature flag evaluation still works locally (needed for runtime feature gates) but does not report back
• No crash reports, no usage analytics, no session fingerprinting

2. Security-prompt guardrails removed

Anthropic injects system-level instructions into every conversation that constrain Claude's behavior beyond what the model itself enforces. These include:

• Hardcoded refusal patterns for certain categories of prompts
• Injected "cyber risk" instruction blocks
• Managed-settings security overlays pushed from Anthropic's servers

This build strips those injections. The model's own safety training still applies -- this just removes the extra layer of prompt-level restrictions that the CLI wraps around it.

3. Experimental features enabled

Claude Code ships with dozens of feature flags gated behind bun:bundle compile-time switches. Most are disabled in the public npm release. This build unlocks all 45+ flags that compile cleanly, including:

Feature	What it does
ULTRAPLAN	Remote multi-agent planning on Claude Code web (Opus-class)
ULTRATHINK	Deep thinking mode -- type "ultrathink" to boost reasoning effort
VOICE_MODE	Push-to-talk voice input and dictation
AGENT_TRIGGERS	Local cron/trigger tools for background automation
BRIDGE_MODE	IDE remote-control bridge (VS Code, JetBrains)
TOKEN_BUDGET	Token budget tracking and usage warnings
BUILTIN_EXPLORE_PLAN_AGENTS	Built-in explore/plan agent presets
VERIFICATION_AGENT	Verification agent for task validation
BASH_CLASSIFIER	Classifier-assisted bash permission decisions
EXTRACT_MEMORIES	Post-query automatic memory extraction
HISTORY_PICKER	Interactive prompt history picker
MESSAGE_ACTIONS	Message action entrypoints in the UI
QUICK_SEARCH	Prompt quick-search
SHOT_STATS	Shot-distribution stats
COMPACTION_REMINDERS	Smart reminders around context compaction
CACHED_MICROCOMPACT	Cached microcompact state through query flows

See FEATURES.md for the full audit of all 88 flags and their status.

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Requirements

• Bun >= 1.3.11
• macOS or Linux (Windows via WSL)

• An Anthropic API key (set ANTHROPIC_API_KEY in your environment)

  # Install Bun if you don't have it
  curl -fsSL https://bun.sh/install | bash
  

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Build

# Clone the repo
git clone https://github.com/paoloanzn/claude-code.git
cd claude-code

# Install dependencies
bun install

# Standard build -- produces ./cli
bun run build

# Dev build -- dev version stamp, experimental GrowthBook key
bun run build:dev

# Dev build with ALL experimental features enabled -- produces ./cli-dev
bun run build:dev:full

# Compiled build (alternative output path) -- produces ./dist/cli
bun run compile

Build variants

Command	Output	Features	Notes
bun run build	./cli	VOICE_MODE only	Production-like binary
bun run build:dev	./cli-dev	VOICE_MODE only	Dev version stamp
bun run build:dev:full	./cli-dev	All 45+ experimental flags	The full unlock build
bun run compile	./dist/cli	VOICE_MODE only	Alternative output directory

Individual feature flags

You can enable specific flags without the full bundle:

# Enable just ultraplan and ultrathink
bun run ./scripts/build.ts --feature=ULTRAPLAN --feature=ULTRATHINK

# Enable a specific flag on top of the dev build
bun run ./scripts/build.ts --dev --feature=BRIDGE_MODE

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Run

# Run the built binary directly
./cli

# Or the dev binary
./cli-dev

# Or run from source without compiling (slower startup)
bun run dev

# Set your API key
export ANTHROPIC_API_KEY="sk-ant-..."

# Or use Claude.ai OAuth
./cli /login

Quick test

# One-shot mode
./cli -p "what files are in this directory?"

# Interactive REPL (default)
./cli

# With specific model
./cli --model claude-sonnet-4-6-20250514

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Project structure

scripts/
  build.ts              # Build script with feature flag system

src/
  entrypoints/cli.tsx   # CLI entrypoint
  commands.ts           # Command registry (slash commands)
  tools.ts              # Tool registry (agent tools)
  QueryEngine.ts        # LLM query engine
  screens/REPL.tsx      # Main interactive UI

  commands/             # /slash command implementations
  tools/                # Agent tool implementations (Bash, Read, Edit, etc.)
  components/           # Ink/React terminal UI components
  hooks/                # React hooks
  services/             # API client, MCP, OAuth, analytics
  state/                # App state store
  utils/                # Utilities
  skills/               # Skill system
  plugins/              # Plugin system
  bridge/               # IDE bridge
  voice/                # Voice input
  tasks/                # Background task management

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Tech stack

Runtime	Bun
Language	TypeScript
Terminal UI	React + Ink
CLI parsing	Commander.js
Schema validation	Zod v4
Code search	ripgrep (bundled)
Protocols	MCP, LSP
API	Anthropic Messages API

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License

The original Claude Code source is the property of Anthropic. This fork exists because the source was publicly exposed through their npm distribution. Use at your own discretion.