feat: add one-liner install script

curl | bash installer that checks OS, git, bun, clones, builds with
all experimental features, and symlinks as `free-code` on PATH.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: paoloanzn

README.md

@@ -61,6 +61,22 @@ See [FEATURES.md](FEATURES.md) for the full audit of all 88 flags and their stat
 
 ---
 
+## Quick install
+
+```bash
+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:
+```bash
+export ANTHROPIC_API_KEY="sk-ant-..."
+free-code
+```
+
+---
+
 ## Requirements
 
 - [Bun](https://bun.sh) >= 1.3.11

install.sh

@@ -0,0 +1,179 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# free-code installer
+# Usage: curl -fsSL https://raw.githubusercontent.com/paoloanzn/free-code/main/install.sh | bash
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+CYAN='\033[0;36m'
+BOLD='\033[1m'
+DIM='\033[2m'
+RESET='\033[0m'
+
+REPO="https://github.com/paoloanzn/free-code.git"
+INSTALL_DIR="$HOME/free-code"
+BUN_MIN_VERSION="1.3.11"
+
+info()  { printf "${CYAN}[*]${RESET} %s\n" "$*"; }
+ok()    { printf "${GREEN}[+]${RESET} %s\n" "$*"; }
+warn()  { printf "${YELLOW}[!]${RESET} %s\n" "$*"; }
+fail()  { printf "${RED}[x]${RESET} %s\n" "$*"; exit 1; }
+
+header() {
+  echo ""
+  printf "${BOLD}${CYAN}"
+  cat << 'ART'
+   ___                            _
+  / _|_ __ ___  ___        ___ __| | ___
+ | |_| '__/ _ \/ _ \_____ / __/ _` |/ _ \
+ |  _| | |  __/  __/_____| (_| (_| |  __/
+ |_| |_|  \___|\___|      \___\__,_|\___|
+
+ART
+  printf "${RESET}"
+  printf "${DIM}  The free build of Claude Code${RESET}\n"
+  echo ""
+}
+
+# -------------------------------------------------------------------
+# System checks
+# -------------------------------------------------------------------
+
+check_os() {
+  case "$(uname -s)" in
+    Darwin) OS="macos" ;;
+    Linux)  OS="linux" ;;
+    *)      fail "Unsupported OS: $(uname -s). macOS or Linux required." ;;
+  esac
+  ok "OS: $(uname -s) $(uname -m)"
+}
+
+check_git() {
+  if ! command -v git &>/dev/null; then
+    fail "git is not installed. Install it first:
+    macOS:  xcode-select --install
+    Linux:  sudo apt install git  (or your distro's equivalent)"
+  fi
+  ok "git: $(git --version | head -1)"
+}
+
+# Compare semver: returns 0 if $1 >= $2
+version_gte() {
+  [ "$(printf '%s\n' "$1" "$2" | sort -V | head -1)" = "$2" ]
+}
+
+check_bun() {
+  if command -v bun &>/dev/null; then
+    local ver
+    ver="$(bun --version 2>/dev/null || echo "0.0.0")"
+    if version_gte "$ver" "$BUN_MIN_VERSION"; then
+      ok "bun: v${ver}"
+      return
+    fi
+    warn "bun v${ver} found but v${BUN_MIN_VERSION}+ required. Upgrading..."
+  else
+    info "bun not found. Installing..."
+  fi
+  install_bun
+}
+
+install_bun() {
+  curl -fsSL https://bun.sh/install | bash
+  # Source the updated profile so bun is on PATH for this session
+  export BUN_INSTALL="${BUN_INSTALL:-$HOME/.bun}"
+  export PATH="$BUN_INSTALL/bin:$PATH"
+  if ! command -v bun &>/dev/null; then
+    fail "bun installation succeeded but binary not found on PATH.
+    Add this to your shell profile and restart:
+      export PATH=\"\$HOME/.bun/bin:\$PATH\""
+  fi
+  ok "bun: v$(bun --version) (just installed)"
+}
+
+# -------------------------------------------------------------------
+# Clone & build
+# -------------------------------------------------------------------
+
+clone_repo() {
+  if [ -d "$INSTALL_DIR" ]; then
+    warn "$INSTALL_DIR already exists"
+    if [ -d "$INSTALL_DIR/.git" ]; then
+      info "Pulling latest changes..."
+      git -C "$INSTALL_DIR" pull --ff-only origin main 2>/dev/null || {
+        warn "Pull failed, continuing with existing copy"
+      }
+    fi
+  else
+    info "Cloning repository..."
+    git clone --depth 1 "$REPO" "$INSTALL_DIR"
+  fi
+  ok "Source: $INSTALL_DIR"
+}
+
+install_deps() {
+  info "Installing dependencies..."
+  cd "$INSTALL_DIR"
+  bun install --frozen-lockfile 2>/dev/null || bun install
+  ok "Dependencies installed"
+}
+
+build_binary() {
+  info "Building free-code (all experimental features enabled)..."
+  cd "$INSTALL_DIR"
+  bun run build:dev:full
+  ok "Binary built: $INSTALL_DIR/cli-dev"
+}
+
+link_binary() {
+  local link_dir="$HOME/.local/bin"
+  mkdir -p "$link_dir"
+
+  ln -sf "$INSTALL_DIR/cli-dev" "$link_dir/free-code"
+  ok "Symlinked: $link_dir/free-code"
+
+  if ! echo "$PATH" | tr ':' '\n' | grep -qx "$link_dir"; then
+    warn "$link_dir is not on your PATH"
+    echo ""
+    printf "${YELLOW}  Add this to your shell profile (~/.bashrc, ~/.zshrc, etc.):${RESET}\n"
+    printf "${BOLD}    export PATH=\"\$HOME/.local/bin:\$PATH\"${RESET}\n"
+    echo ""
+  fi
+}
+
+# -------------------------------------------------------------------
+# Main
+# -------------------------------------------------------------------
+
+header
+info "Starting installation..."
+echo ""
+
+check_os
+check_git
+check_bun
+echo ""
+
+clone_repo
+install_deps
+build_binary
+link_binary
+
+echo ""
+printf "${GREEN}${BOLD}  Installation complete!${RESET}\n"
+echo ""
+printf "  ${BOLD}Run it:${RESET}\n"
+printf "    ${CYAN}free-code${RESET}                          # interactive REPL\n"
+printf "    ${CYAN}free-code -p \"your prompt\"${RESET}          # one-shot mode\n"
+echo ""
+printf "  ${BOLD}Set your API key:${RESET}\n"
+printf "    ${CYAN}export ANTHROPIC_API_KEY=\"sk-ant-...\"${RESET}\n"
+echo ""
+printf "  ${BOLD}Or log in with Claude.ai:${RESET}\n"
+printf "    ${CYAN}free-code /login${RESET}\n"
+echo ""
+printf "  ${DIM}Source: $INSTALL_DIR${RESET}\n"
+printf "  ${DIM}Binary: $INSTALL_DIR/cli-dev${RESET}\n"
+printf "  ${DIM}Link:   ~/.local/bin/free-code${RESET}\n"
+echo ""