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.

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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:

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

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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

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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

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

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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.

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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.