code-yeongyu/free-code

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.

curl -fsSL https://raw.githubusercontent.com/paoloanzn/free-code/main/install.sh | bash

Checks your system, installs Bun if needed, clones, builds with all features enabled, and puts free-code on your PATH. Then just export ANTHROPIC_API_KEY="sk-ant-..." and run free-code.

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:

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

Quick install

curl -fsSL https://raw.githubusercontent.com/paoloanzn/free-code/main/install.sh | bash

This will check your system, install Bun if needed, clone the repo, build the binary with all experimental features enabled, and symlink it as free-code on your PATH.

After install, just run:

export ANTHROPIC_API_KEY="sk-ant-..."
free-code

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

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

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

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

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

Tech stack

IPFS Mirror

A full copy of this repository is permanently pinned on IPFS via Filecoin:

• CID: bafybeiegvef3dt24n2znnnmzcud2vxat7y7rl5ikz7y7yoglxappim54bm
• Gateway: https://w3s.link/ipfs/bafybeiegvef3dt24n2znnnmzcud2vxat7y7rl5ikz7y7yoglxappim54bm

If this repo gets taken down, the code lives on.

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.