fix(mcp): bundle stdio shim sidecar

.github/workflows/build-windows.yml

@@ -29,11 +29,14 @@ jobs:
         run: |
           cd backend
           python build_binary.py
+          python build_binary.py --shim
 
           PLATFORM=$(rustc --print host-tuple)
           mkdir -p ../tauri/src-tauri/binaries
           cp dist/voicebox-server.exe ../tauri/src-tauri/binaries/voicebox-server-${PLATFORM}.exe
+          cp dist/voicebox-mcp.exe ../tauri/src-tauri/binaries/voicebox-mcp-${PLATFORM}.exe
           echo "Built voicebox-server-${PLATFORM}.exe"
+          echo "Built voicebox-mcp-${PLATFORM}.exe"
 
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2

.github/workflows/release.yml

@@ -114,6 +114,7 @@ jobs:
         run: |
           cd backend
           python build_binary.py
+          python build_binary.py --shim
 
           # Get platform tuple
           PLATFORM=$(rustc --print host-tuple)
@@ -123,7 +124,9 @@ jobs:
 
           # Copy with platform suffix
           cp dist/voicebox-server.exe ../tauri/src-tauri/binaries/voicebox-server-${PLATFORM}.exe
+          cp dist/voicebox-mcp.exe ../tauri/src-tauri/binaries/voicebox-mcp-${PLATFORM}.exe
           echo "Built voicebox-server-${PLATFORM}.exe"
+          echo "Built voicebox-mcp-${PLATFORM}.exe"
 
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2

app/src/components/ServerTab/MCPPage.tsx

@@ -16,6 +16,21 @@ import { useServerStore } from '@/stores/serverStore';
 import { formatDate } from '@/lib/utils/format';
 import { SettingRow, SettingSection } from './SettingRow';
 
+function getStdioShimCommand(): string {
+  if (typeof navigator === 'undefined') {
+    return '/Applications/Voicebox.app/Contents/MacOS/voicebox-mcp';
+  }
+
+  const platform = `${navigator.platform} ${navigator.userAgent}`.toLowerCase();
+  if (platform.includes('win')) {
+    return 'C:\\Program Files\\Voicebox\\voicebox-mcp.exe';
+  }
+  if (platform.includes('linux')) {
+    return '/opt/voicebox/voicebox-mcp';
+  }
+  return '/Applications/Voicebox.app/Contents/MacOS/voicebox-mcp';
+}
+
 /**
  * Settings → MCP — configure per-agent voice binding and show copy-paste
  * install snippets for major MCP clients. Backend runs at /mcp on the
@@ -30,6 +45,7 @@ export function MCPPage() {
 
   const defaultProfileId = captureSettings?.default_playback_voice_id ?? '';
   const mcpUrl = `${serverUrl}/mcp`;
+  const stdioShimCommand = getStdioShimCommand();
 
   const [newClientId, setNewClientId] = useState('');
   const [newLabel, setNewLabel] = useState('');
@@ -88,8 +104,7 @@ export function MCPPage() {
               {
                 mcpServers: {
                   voicebox: {
-                    command:
-                      '/Applications/Voicebox.app/Contents/MacOS/voicebox-mcp',
+                    command: stdioShimCommand,
                     env: { VOICEBOX_CLIENT_ID: 'claude-code' },
                   },
                 },

scripts/build-server.sh

@@ -6,7 +6,7 @@ set -e
 # Determine platform
 PLATFORM=$(rustc --print host-tuple 2>/dev/null || echo "unknown")
 
-echo "Building voicebox-server for platform: $PLATFORM"
+echo "Building Voicebox sidecars for platform: $PLATFORM"
 
 # Build Python binary
 # Resolve PATH to absolute paths before changing directory
@@ -19,23 +19,29 @@ if ! python -c "import PyInstaller" 2>/dev/null; then
     python -m pip install pyinstaller
 fi
 
-# Build binary
-python build_binary.py
-
 # Create binaries directory if it doesn't exist
 mkdir -p ../tauri/src-tauri/binaries
 
-# Copy binary with platform suffix
-if [ -f dist/voicebox-server ]; then
-    cp dist/voicebox-server ../tauri/src-tauri/binaries/voicebox-server-${PLATFORM}
-    chmod +x ../tauri/src-tauri/binaries/voicebox-server-${PLATFORM}
-    echo "Built voicebox-server-${PLATFORM}"
-elif [ -f dist/voicebox-server.exe ]; then
-    cp dist/voicebox-server.exe ../tauri/src-tauri/binaries/voicebox-server-${PLATFORM}.exe
-    echo "Built voicebox-server-${PLATFORM}.exe"
-else
-    echo "Error: Binary not found in dist/"
-    exit 1
-fi
+copy_sidecar() {
+    local name="$1"
+
+    if [ -f "dist/${name}" ]; then
+        cp "dist/${name}" "../tauri/src-tauri/binaries/${name}-${PLATFORM}"
+        chmod +x "../tauri/src-tauri/binaries/${name}-${PLATFORM}"
+        echo "Built ${name}-${PLATFORM}"
+    elif [ -f "dist/${name}.exe" ]; then
+        cp "dist/${name}.exe" "../tauri/src-tauri/binaries/${name}-${PLATFORM}.exe"
+        echo "Built ${name}-${PLATFORM}.exe"
+    else
+        echo "Error: ${name} binary not found in dist/"
+        exit 1
+    fi
+}
+
+python build_binary.py
+copy_sidecar voicebox-server
+
+python build_binary.py --shim
+copy_sidecar voicebox-mcp
 
 echo "Build complete!"