feat: add Windows (NSIS) build support

Author: akemmanuel

.github/workflows/build.yml

@@ -73,9 +73,40 @@ jobs:
           path: release/*.dmg
           retention-days: 30
 
+  build-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Lint
+        run: bun run lint:check
+
+      - name: Typecheck
+        run: bun run typecheck
+
+      - name: Build frontend
+        run: bun run build
+
+      - name: Package .exe (NSIS)
+        run: bunx electron-builder --win nsis --publish never
+
+      - name: Upload .exe artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: windows-nsis
+          path: release/*.exe
+          retention-days: 30
+
   release:
     if: startsWith(github.ref, 'refs/tags/v')
-    needs: [build-linux, build-mac]
+    needs: [build-linux, build-mac, build-windows]
     runs-on: ubuntu-latest
     permissions:
       contents: write
@@ -93,3 +124,4 @@ jobs:
             artifacts/linux-deb/*.deb
             artifacts/mac-dmg-x64/*.dmg
             artifacts/mac-dmg-arm64/*.dmg
+            artifacts/windows-nsis/*.exe

README.md

@@ -36,7 +36,7 @@ OpenGUI wraps the OpenCode server in an Electron shell with a React frontend, gi
 - **Syntax highlighting** - code blocks rendered with shiki, theme-aware
 - **Math rendering** - LaTeX/KaTeX support in assistant responses
 - **Dark/light theme** - system-aware with manual toggle
-- **Cross-platform** - builds for Linux (.deb) and macOS (.dmg)
+- **Cross-platform** - builds for Linux (.deb), macOS (.dmg), and Windows (.exe NSIS installer)
 
 ## Prerequisites
 
@@ -96,6 +96,16 @@ Build a `.dmg` installer (macOS):
 bun run dist:mac
 ```
 
+Build a `.exe` installer (Windows):
+
+```bash
+bun run dist:win
+```
+
+> **Windows prerequisite**: The [OpenCode CLI](https://opencode.ai) must be installed and available on your PATH (or at `%USERPROFILE%\.opencode\bin\opencode.exe`). OpenGUI does not bundle the CLI.
+
+> **Note**: Windows builds are unsigned. Windows SmartScreen will warn on first launch - click "More info" then "Run anyway".
+
 ## Architecture
 
 ```

package.json

@@ -20,6 +20,8 @@
 		"dist": "bunx electron-builder --linux deb",
 		"dist:mac": "bunx electron-builder --mac dmg",
 		"dist:mac:arm64": "bunx electron-builder --mac dmg --arm64",
+		"dist:win": "bunx electron-builder --win nsis",
+		"dist:win:portable": "bunx electron-builder --win portable",
 		"typecheck": "bunx tsc --noEmit",
 		"lint": "bunx --bun biome check --write",
 		"lint:check": "bunx --bun biome check",
@@ -46,6 +48,17 @@
 		"dmg": {
 			"icon": "assets/icon.icns"
 		},
+		"win": {
+			"target": "nsis",
+			"icon": "assets/icon.png"
+		},
+		"nsis": {
+			"oneClick": false,
+			"allowToChangeInstallationDirectory": true,
+			"createDesktopShortcut": true,
+			"createStartMenuShortcut": true,
+			"shortcutName": "OpenGUI"
+		},
 		"files": [
 			"dist/**/*",
 			"!dist/**/*.map",

src/lib/utils.ts

@@ -66,9 +66,9 @@ export function getPrimaryAgents(agents: Agent[]): Agent[] {
 	});
 }
 
-/** Extract the trailing directory name from an absolute path. */
+/** Extract the trailing directory name from an absolute path (cross-platform). */
 export function getProjectName(directory: string, fallback = "repo"): string {
-	const parts = directory.replace(/\/+$/, "").split("/");
+	const parts = directory.replace(/[/\\]+$/, "").split(/[/\\]/);
 	return parts[parts.length - 1] || fallback;
 }