diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
new file mode 100644
index 0000000..a843646
--- /dev/null
+++ b/.github/workflows/deploy.yml
@@ -0,0 +1,80 @@
+name: Deploy Tools
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+concurrency:
+  group: tools-deploy
+  cancel-in-progress: false
+
+permissions:
+  contents: read
+  id-token: write
+
+env:
+  VPS_HOST: ${{ secrets.VPS_HOST }}
+  VPS_USER: ${{ secrets.VPS_USER }}
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    timeout-minutes: 90
+    strategy:
+      fail-fast: false
+      matrix:
+        service: [tools-gateway, tools-workers, tools-frontend]
+
+    steps:
+      - uses: actions/checkout@v7
+        with:
+          fetch-depth: 0
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v22
+        with:
+          determinate: false
+          extra-conf: |
+            sandbox = false
+            accept-flake-config = true
+
+      - name: Cache Nix
+        uses: DeterminateSystems/magic-nix-cache-action@v14
+        with:
+          use-flakehub: false
+
+      - name: Build ${{ matrix.service }}
+        id: build
+        run: |
+          nix build .#${{ matrix.service }} --impure --option sandbox false --print-build-logs
+          STORE_PATH=$(readlink result)
+          echo "store-path=$STORE_PATH" >> "$GITHUB_OUTPUT"
+          echo "✅ ${{ matrix.service }}: $STORE_PATH"
+
+      - name: Setup SSH key
+        if: github.ref == 'refs/heads/main'
+        env:
+          SSH_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
+        run: |
+          mkdir -p ~/.ssh
+          echo "$SSH_KEY" > ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+          sed -i 's/\r$//' ~/.ssh/id_ed25519
+          ssh-keygen -y -f ~/.ssh/id_ed25519 >/dev/null 2>&1 || { echo "SSH key invalid"; exit 1; }
+          ssh-keyscan -H "$VPS_HOST" >> ~/.ssh/known_hosts 2>/dev/null
+
+      - name: Deploy ${{ matrix.service }} to VPS
+        if: github.ref == 'refs/heads/main'
+        run: |
+          STORE_PATH="${{ steps.build.outputs.store-path }}"
+          echo "=== Copying ${{ matrix.service }}: $STORE_PATH ==="
+          nix copy --to "ssh://${{ secrets.VPS_USER }}@${{ secrets.VPS_HOST }}" "$STORE_PATH"
+
+          echo "=== Updating profile ==="
+          ssh "$VPS_USER@$VPS_HOST" "sudo /nix/var/nix/profiles/default/bin/nix-env --profile /nix/var/nix/profiles/${{ matrix.service }} --set '$STORE_PATH'"
+
+          echo "=== Restarting service ==="
+          ssh "$VPS_USER@$VPS_HOST" "sudo systemctl restart ${{ matrix.service }}" || echo "  ⚠️ restart failed (may not be enabled yet)"
+
+          echo "✅ ${{ matrix.service }} deployed"
\ No newline at end of file
diff --git a/.github/workflows/notify-parent.yml b/.github/workflows/notify-parent.yml
deleted file mode 100644
index 8db6602..0000000
--- a/.github/workflows/notify-parent.yml
+++ /dev/null
@@ -1,25 +0,0 @@
-name: Notify Parent Repo
-
-on:
-  push:
-    branches:
-      - main
-  workflow_dispatch:
-
-jobs:
-  dispatch:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Trigger root monorepo build
-        uses: peter-evans/repository-dispatch@v3
-        with:
-          token: ${{ secrets.DISPATCH_TOKEN }}
-          repository: asepharyana/asepharyana-hub
-          event-type: submodule-updated
-          client-payload: |
-            {
-              "service": "tools",
-              "ref": "${{ github.ref }}",
-              "sha": "${{ github.sha }}",
-              "actor": "${{ github.actor }}"
-            }
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..4e9fff3
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,119 @@
+{
+  description = "Asepharyana Tools — document scanner & media processing tools (Rust gateway/workers + Next.js frontend)";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachSystem [ "x86_64-linux" ] (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          config.allowUnfree = true;
+        };
+
+        # ── mkApp generator ──
+        mkApp = { name, src, buildScript, installScript, nativeBuildInputs ? [], buildInputs ? [] }:
+          pkgs.stdenv.mkDerivation {
+            inherit name src;
+
+            nativeBuildInputs = with pkgs; [
+              cacert curl gcc gnumake openssl pkg-config python3 libclang
+            ] ++ nativeBuildInputs;
+
+            buildInputs = with pkgs; [
+              nodejs openssl stdenv.cc.cc.lib libffi
+            ] ++ buildInputs;
+
+            LIBCLANG_PATH = "${pkgs.libclang.lib}/lib";
+            LD_LIBRARY_PATH = "${pkgs.libclang.lib}/lib:${pkgs.stdenv.cc.cc.lib}/lib:${pkgs.libffi}/lib";
+            NIX_ENFORCE_PURITY = "0";
+
+            SSL_CERT_FILE = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
+            NODE_EXTRA_CA_CERTS = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
+            NODE_ENV = "production";
+
+            phases = [ "unpackPhase" "buildPhase" "installPhase" ];
+            buildPhase = ''
+              export HOME="$TMPDIR" CARGO_HOME="$TMPDIR/.cargo-${name}"
+              SSL_CERT_FILE=${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt
+            '' + buildScript;
+            installPhase = installScript;
+          };
+
+        cargoDeps = with pkgs; [ rustc cargo clang cmake pkg-config openssl.dev zlib ];
+
+        tools-gateway = mkApp {
+          name = "tools-gateway-0.1.0";
+          src = ./.;
+          nativeBuildInputs = cargoDeps ++ [ pkgs.tesseract ];
+
+          buildScript = ''
+            cd backend
+            echo "=== Building tools-gateway ==="
+            cargo build --release --features tesseract --bin tools-gateway 2>&1
+          '';
+
+          installScript = ''
+            mkdir -p $out/bin
+            cp target/release/tools-gateway $out/bin/tools-gateway
+          '';
+        };
+
+        tools-workers = mkApp {
+          name = "tools-workers-0.1.0";
+          src = ./.;
+          nativeBuildInputs = cargoDeps ++ [ pkgs.tesseract pkgs.leptonica ];
+
+          buildScript = ''
+            cd backend
+            echo "=== Building tools-workers ==="
+            cargo build --release --features tesseract --bin tools-workers 2>&1
+          '';
+
+          installScript = ''
+            mkdir -p $out/bin
+            cp target/release/tools-workers $out/bin/tools-workers
+          '';
+        };
+
+        tools-frontend = mkApp {
+          name = "tools-frontend-0.1.0";
+          src = ./.;
+          nativeBuildInputs = with pkgs; [ bun ];
+
+          buildScript = ''
+            cd frontend
+            echo "=== Installing dependencies ==="
+            bun install 2>&1
+            echo "=== Building Next.js ==="
+            bun run build 2>&1
+          '';
+
+          installScript = ''
+            mkdir -p $out/share/tools-frontend $out/bin
+            cp -r .next $out/share/tools-frontend/
+            cp -r public $out/share/tools-frontend/ 2>/dev/null || true
+            cp package.json $out/share/tools-frontend/
+            cp -r node_modules $out/share/tools-frontend/
+            cat > $out/bin/tools-frontend << WRAPPER
+#!${pkgs.runtimeShell}
+exec ${pkgs.bun}/bin/bun run --cwd $out/share/tools-frontend start
+WRAPPER
+            chmod +x $out/bin/tools-frontend
+          '';
+        };
+      in
+      {
+        packages = {
+          inherit tools-gateway tools-workers tools-frontend;
+          default = tools-gateway;
+        };
+
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [ nodejs-slim_22 bun rustc cargo tesseract leptonica ];
+        };
+      });
+}
\ No newline at end of file