Initial release

launch.sh

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+#!/bin/bash
+# HOT-Step CPP — macOS Launcher (Production)
+#
+# Starts the Node.js server, which in turn spawns ace-server as a child process.
+# Automatically finds a compatible Node.js (bundled > brew > system).
+#
+# Usage:
+#   ./launch.sh                           # Normal launch
+#   HOT_STEP_ROOT=$(pwd) ./launch.sh      # Portable mode
+
+set -e
+
+cd "$(dirname "$0")"
+ROOT_DIR="$(pwd)"
+
+echo ""
+echo "╔══════════════════════════════════════════╗"
+echo "║         HOT-Step 9000 ⚡ CPP            ║"
+echo "║    High-Performance Music Generation     ║"
+echo "╚══════════════════════════════════════════╝"
+echo ""
+
+# ── Find Node.js ────────────────────────────────────────────────────
+# Priority: bundled runtime > brew node@22 > system node (if compatible)
+find_node() {
+    # 1. Bundled Node (portable release)
+    if [ -x "${ROOT_DIR}/runtime/node" ]; then
+        echo "${ROOT_DIR}/runtime"
+        return 0
+    fi
+
+    # 2. Brew node@22
+    local brew_paths=(
+        "/opt/homebrew/opt/node@22/bin"
+        "/usr/local/opt/node@22/bin"
+    )
+    for bp in "${brew_paths[@]}"; do
+        if [ -x "${bp}/node" ]; then
+            echo "$bp"
+            return 0
+        fi
+    done
+
+    # 3. System node (with version check)
+    if command -v node &>/dev/null; then
+        local ver
+        ver="$(node --version 2>/dev/null | tr -d 'v')"
+        local major="${ver%%.*}"
+        if [ "$major" -ge 18 ] && [ "$major" -lt 24 ] 2>/dev/null; then
+            echo "$(dirname "$(command -v node)")"
+            return 0
+        fi
+    fi
+
+    return 1
+}
+
+NODE_DIR=""
+if NODE_DIR=$(find_node); then
+    export PATH="${NODE_DIR}:${PATH}"
+    echo "  Node.js: $(node --version) ($(which node))"
+else
+    echo "❌ No compatible Node.js found (need 18-22)."
+    echo ""
+    echo "   Your system Node: $(node --version 2>/dev/null || echo 'not installed')"
+    echo ""
+    echo "   Fix: brew install node@22"
+    echo "   Or:  Run ./install.sh to set up everything"
+    echo ""
+    exit 1
+fi
+
+# ── Check engine binary ─────────────────────────────────────────────
+ENGINE_BIN=""
+for candidate in \
+    "engine/build/ace-server" \
+    "engine/ace-server" \
+    "engine/build/Release/ace-server"; do
+    if [ -f "$candidate" ]; then
+        ENGINE_BIN="$candidate"
+        break
+    fi
+done
+
+if [ -n "$ENGINE_BIN" ]; then
+    echo "  Engine:  ${ENGINE_BIN}"
+else
+    echo "  ⚠️  ace-server not found — the UI will start but generation won't work."
+    echo "     Build it: cd engine && ./build-mac.sh"
+    echo "     Or run:   ./install.sh"
+    echo ""
+fi
+
+# ── Check server dependencies ────────────────────────────────────────
+if [ ! -d "server/node_modules" ]; then
+    echo ""
+    echo "📦 Installing server dependencies (first run)..."
+    cd server && npm install --loglevel=warn && cd ..
+fi
+
+# ── Build UI if needed ───────────────────────────────────────────────
+if [ ! -d "ui/dist" ]; then
+    if [ -d "ui/node_modules" ]; then
+        echo ""
+        echo "🔨 Building UI (first run)..."
+        cd ui && npx vite build 2>&1 | tail -3 && cd ..
+    else
+        echo "  ⚠️  UI not built. Run ./install.sh or: cd ui && npm install && npx vite build"
+    fi
+fi
+
+# ── Gatekeeper hint ──────────────────────────────────────────────────
+if [ -n "$ENGINE_BIN" ] && xattr -l "$ENGINE_BIN" 2>/dev/null | grep -q "com.apple.quarantine" 2>/dev/null; then
+    echo ""
+    echo "  🔒 macOS is blocking unsigned binaries. Fix with:"
+    echo "     xattr -cr ${ROOT_DIR}"
+    echo ""
+fi
+
+# ── Open browser after delay ─────────────────────────────────────────
+(sleep 4 && open "http://localhost:3001" 2>/dev/null) &
+
+# ── Start the server (with restart loop) ─────────────────────────────
+MARKER="${ROOT_DIR}/.restart-requested"
+rm -f "$MARKER"
+
+start_server() {
+    cd "${ROOT_DIR}/server"
+    if [ -d "node_modules/tsx" ]; then
+        node --import tsx/esm src/index.ts
+    else
+        npx tsx src/index.ts
+    fi
+}
+
+while true; do
+    echo ""
+    echo "  🎵 Starting server..."
+    echo ""
+    start_server
+    EXIT_CODE=$?
+
+    # Check for restart marker
+    if [ -f "$MARKER" ]; then
+        rm -f "$MARKER"
+        echo ""
+        echo "  🔄 Restarting server..."
+        sleep 1
+        continue
+    fi
+
+    # Normal exit
+    echo ""
+    echo "  Server exited (code $EXIT_CODE)."
+    break
+done
+