diff --git a/Projects/hello_ros/docker-compose.yml b/Projects/hello_ros/docker-compose.yml
index 20c58e0..7d80b73 100644
--- a/Projects/hello_ros/docker-compose.yml
+++ b/Projects/hello_ros/docker-compose.yml
@@ -6,4 +6,4 @@ services:
     working_dir: /workspace
     tty: true
     volumes:
-      - "/Users/trieutran/BROS/Projects/hello_ros/workspace:/workspace"
+      - "/Users/trieutran/BROS2/Projects/hello_ros/workspace:/workspace"
diff --git a/README.md b/README.md
index 6ca965e..4c64672 100644
--- a/README.md
+++ b/README.md
@@ -26,8 +26,8 @@ docker ps
 ## 🧱 First-Time Setup
 
 ```bash
-git clone https://github.com/nhathout/BROS.git
-cd BROS
+git clone https://github.com/nhathout/BROS2.git
+cd BROS2
 ./apps/desktop-app/scripts/bootstrap.sh
 ```
 
@@ -41,20 +41,54 @@ It launches the packaged app once everything compiles. If the script adds an `nv
 
 ## ⏳ Daily Development
 
-From a bootstrapped workspace, start the dev environment from the desktop app folder:
+1. **Select Node 20.19.x** (every new shell resets your `nvm` version):
 
-```bash
-cd apps/desktop-app
-node node_modules/electron/install.js  
-pnpm dev
-```
+   ```bash
+   source ~/.nvm/nvm.sh
+   nvm use 20.19.0
+   ```
+
+2. **Refresh dependencies** after pulling changes:
+
+   ```bash
+   pnpm install -r
+   ```
+
+3. **Build the workspace libraries** so their `.d.ts` files exist for the Electron main process. Run each filter separately from the repo root (brace expansion is not supported):
+
+   ```bash
+   pnpm --filter @bros2/runtime build
+   pnpm --filter @bros2/shared build
+   pnpm --filter @bros2/ui build
+   pnpm --filter @bros2/validation build
+   pnpm --filter @bros2/runner build
+   ```
+
+4. **Emit the desktop main + preload bundle** (run from the repo root so the filter resolves):
+
+   ```bash
+   pnpm --filter ./apps/desktop-app build:main
+   ```
+
+   (Optional) Build the renderer bundle for production checks — also from the repo root:
+
+   ```bash
+   pnpm --filter ./apps/desktop-app build:renderer
+   ```
+
+5. **Start the dev environment** (Electron main + Vite renderer):
+
+   ```bash
+   pnpm --filter ./apps/desktop-app dev
+   ```
 
-`pnpm dev` runs the Electron main process (`dev:main`) and the Vite renderer (`dev:renderer`) concurrently. Keep this terminal open while developing. You can also run the same command from the repo root with `pnpm --filter ./apps/desktop-app dev`.
+   Keep this process running while you iterate. You can still `cd apps/desktop-app && pnpm dev`, but the filtered form avoids path mistakes.
 
-If you pull dependency changes later, refresh them with:
+If Electron complains about missing binaries, reinstall them once:
 
 ```bash
-pnpm install -r
+cd apps/desktop-app
+node node_modules/electron/install.js
 ```
 
 ## 🤖 ROS 2 Dev Notes
@@ -98,23 +132,54 @@ const { errors, warnings } = await window.ir.validate(ir);
 console.log({ issues, errors, warnings });
 ```
 
-## 🧹 Cleaning
+### Runtime bridge & ArrowKey publisher smoke test
 
-Wipe compiled artifacts across every workspace when you need a fresh build:
+The preload now exposes `window.runtime` alongside the runner and IR bridges. With the dev app running:
 
-```bash
-pnpm -r clean
+```js
+typeof window.runtime; // "object"
+const id = window.runtime.create("ArrowKeyPub", { topic: "keys/arrows" });
+window.runtime.start(id);
+// Press arrow keys while the Electron window is focused:
+// [publish] keys/arrows <- { key: "left", ts: ... }
+// [node:ArrowKeyPub_1] pressed: left
+window.runtime.stop(id);
+window.runtime.list(); // ["ArrowKeyPub_1"]
 ```
 
-To reset dependencies as well:
+If `window.runtime` is missing, run `pnpm --filter ./apps/desktop-app build:main` again to regenerate the preload bridges.
 
-```bash
-pnpm store prune
-rm -rf node_modules
-pnpm install -r
-```
+## 🧹 Cleaning & Full Rebuild
+
+1. Remove build outputs everywhere (this clears `dist/` folders and `tsconfig.main.tsbuildinfo`, ensuring the desktop main bundle re-emits `dist/main.js`):
+
+   ```bash
+   pnpm -r clean
+   ```
+
+2. Reset dependencies if things get out of sync:
+
+   ```bash
+   pnpm store prune   # optional
+   rm -rf node_modules
+   pnpm install -r
+   ```
+
+3. Rebuild the workspaces and desktop app using the daily workflow above. When `build:main` succeeds you should have:
+
+   ```
+   apps/desktop-app/dist/main.js
+   apps/desktop-app/dist/preload.js
+   apps/desktop-app/dist/remote/runtime-bridge.cjs
+   ```
+
+4. (Optional) Produce installers:
+
+   ```bash
+   pnpm -r build
+   ```
 
-After cleaning, rerun `pnpm dev` (or `./apps/desktop-app/scripts/bootstrap.sh`) to rebuild the app.
+   You may ignore macOS code-sign warnings on local development machines.
 
 ## 💡 Tips
 - Keep Docker running whenever you use `window.runner.*`; the runner manages containers in `Projects/`.
diff --git a/apps/desktop-app/package.json b/apps/desktop-app/package.json
index 314720c..72bc7a3 100644
--- a/apps/desktop-app/package.json
+++ b/apps/desktop-app/package.json
@@ -1,8 +1,8 @@
 {
-  "name": "bros-desktop",
+  "name": "2-desktop",
   "private": true,
   "version": "0.1.0",
-  "description": "BROS Desktop — Electron + React (Vite) app for visual ROS2 development",
+  "description": "BROS2 Desktop — Electron + React (Vite) app for visual ROS2 development",
   "main": "dist/main.js",
   "type": "commonjs",
   "scripts": {
@@ -10,16 +10,16 @@
     "dev:main": "cross-env NODE_ENV=development TS_NODE_PROJECT=tsconfig.main.json electron ./electron-main.cjs",
     "dev:renderer": "vite --config src/renderer/vite.config.ts",
     "build": "pnpm clean && pnpm build:main && pnpm build:renderer && electron-builder",
-    "build:main": "tsc -p tsconfig.main.json",
+    "build:main": "tsc -p tsconfig.main.json && tsc -p tsconfig.runtime.json",
     "build:renderer": "vite build --config src/renderer/vite.config.ts",
     "start": "cross-env NODE_ENV=production electron ./dist/main.js",
-    "clean": "rimraf dist release",
+    "clean": "rimraf dist release tsconfig.main.tsbuildinfo",
     "typecheck": "pnpm tsc -b tsconfig.main.json && pnpm tsc --noEmit -p tsconfig.renderer.json",
     "postinstall": "electron-builder install-app-deps"
   },
   "build": {
-    "appId": "com.bros.desktop",
-    "productName": "BROS Desktop",
+    "appId": "com.bros2.desktop",
+    "productName": "BROS2 Desktop",
     "directories": {
       "output": "release"
     },
@@ -66,9 +66,11 @@
     "vite": "^7.1.7"
   },
   "dependencies": {
-    "@bros/runner": "workspace:*",
-    "@bros/ui": "workspace:*",
-    "@bros/validation": "workspace:*",
+    "@bros2/runtime": "workspace:*",
+    "@bros2/shared": "workspace:*",
+    "@bros2/runner": "workspace:*",
+    "@bros2/ui": "workspace:*",
+    "@bros2/validation": "workspace:*",
     "bootstrap": "^5.3.8",
     "dotenv": "^17.2.3",
     "express": "^5.1.0",
diff --git a/apps/desktop-app/scripts/bootstrap.sh b/apps/desktop-app/scripts/bootstrap.sh
index c2c6962..1c68761 100755
--- a/apps/desktop-app/scripts/bootstrap.sh
+++ b/apps/desktop-app/scripts/bootstrap.sh
@@ -2,7 +2,7 @@
 set -euo pipefail
 
 # -------------------------------
-# BROS Bootstrap Script
+# BROS2 Bootstrap Script
 # -------------------------------
 # 1. Ensures NVM is installed
 # 2. Uses Node 20.19.0
@@ -16,7 +16,7 @@ PNPM_VERSION="10.17.1"
 NVM_INSTALL_URL="https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh"
 AUTO_NVM_CONFIGURED=0
 
-echo "Bootstrapping BROS development environment..."
+echo "Bootstrapping BROS2 development environment..."
 
 # --- Install / Load NVM ---
 export NVM_DIR="${NVM_DIR:-$HOME/.nvm}"
@@ -50,7 +50,7 @@ AUTO_NVM_SNIPPET="nvm use $NODE_VERSION"
 if [ -w "$ZSHRC_PATH" ] && ! grep -Fq "$AUTO_NVM_SNIPPET" "$ZSHRC_PATH"; then
   echo "ℹ️ Enabling automatic 'nvm use $NODE_VERSION' in $ZSHRC_PATH"
   {
-    echo "\n# BROS bootstrap: ensure Node $NODE_VERSION via nvm"
+    echo "\n# BROS2 bootstrap: ensure Node $NODE_VERSION via nvm"
     echo "if [ -s \"$NVM_DIR/nvm.sh\" ]; then"
     echo "  . \"$NVM_DIR/nvm.sh\""
     echo "  nvm use $NODE_VERSION >/dev/null"
@@ -113,7 +113,7 @@ echo "Building renderer assets..."
 pnpm --filter ./apps/desktop-app build:renderer
 
 # --- Launch packaged Electron binary ---
-echo "Launching BROS desktop (Electron)…"
+echo "Launching BROS2 desktop (Electron)…"
 pnpm --filter ./apps/desktop-app start
 
 echo "Bootstrap complete!"
diff --git a/apps/desktop-app/src/auth.js b/apps/desktop-app/src/auth.js
index 3b42b7a..8182db2 100644
--- a/apps/desktop-app/src/auth.js
+++ b/apps/desktop-app/src/auth.js
@@ -18,7 +18,7 @@ async function loginWithGitHub() {
         console.error("❌ No access_token returned from GitHub OAuth exchange.");
         return;
     }
-    await keytar_1.default.setPassword("BROS", "github", token.access_token);
+    await keytar_1.default.setPassword("BROS2", "github", token.access_token);
     console.log("✅ Token stored in keychain");
 }
 async function openOAuthWindow(authUrl, redirectUri) {
diff --git a/apps/desktop-app/src/auth.ts b/apps/desktop-app/src/auth.ts
index cd530e5..0bbc112 100644
--- a/apps/desktop-app/src/auth.ts
+++ b/apps/desktop-app/src/auth.ts
@@ -25,7 +25,7 @@ export async function loginWithGitHub(): Promise<void> {
     return;
   }
 
-  await keytar.setPassword("BROS", "github", token.access_token);
+  await keytar.setPassword("BROS2", "github", token.access_token);
   console.log("✅ Token stored in keychain");
 }
 
diff --git a/apps/desktop-app/src/main.js b/apps/desktop-app/src/main.js
index 2d82c1d..e1be92c 100644
--- a/apps/desktop-app/src/main.js
+++ b/apps/desktop-app/src/main.js
@@ -4,9 +4,9 @@ import { fileURLToPath } from "node:url";
 import { app, BrowserWindow, ipcMain, shell } from "electron";
 import express from "express";
 import dotenv from "dotenv";
-import { Runner } from "@bros/runner";
-import { buildIR } from "@bros/ui";
-import { validateIR } from "@bros/validation";
+import { Runner } from "@bros2/runner";
+import { buildIR } from "@bros2/ui";
+import { validateIR } from "@bros2/validation";
 // --- Setup ---
 dotenv.config();
 const __filename = fileURLToPath(import.meta.url);
diff --git a/apps/desktop-app/src/main.ts b/apps/desktop-app/src/main.ts
index 495071a..60dbf16 100644
--- a/apps/desktop-app/src/main.ts
+++ b/apps/desktop-app/src/main.ts
@@ -5,65 +5,53 @@ import type { BrowserWindow } from "electron";
 import express from "express";
 import dotenv from "dotenv";
 
-import type { BlockGraph } from "@bros/ui";
-import type { IR } from "@bros/shared";
-import type { Runner as RunnerInstance } from "@bros/runner";
+import type { BlockGraph } from "@bros2/ui";
+import type { IR } from "@bros2/shared";
+import type { Runner as RunnerInstance } from "@bros2/runner";
 
 const { app, ipcMain, shell, BrowserWindow: BrowserWindowCtor } = electron;
 
 // --- Dynamic module loaders ---
-type RunnerCtor = typeof import("@bros/runner")["Runner"];
-type BuildIrFn = typeof import("@bros/ui")["buildIR"];
-type ValidateIrFn = typeof import("@bros/validation")["validateIR"];
+type RunnerCtor = typeof import("@bros2/runner")["Runner"];
+type BuildIrFn = typeof import("@bros2/ui")["buildIR"];
+type ValidateIrFn = typeof import("@bros2/validation")["validateIR"];
 
-let runnerCtor: RunnerCtor | null = null;
-let buildIr: BuildIrFn | null = null;
-let validateIr: ValidateIrFn | null = null;
+let runner: RunnerInstance | null = null;
+let runnerProjectKey: string | null = null;
+let mainWindow: BrowserWindow | null = null;
+
+dotenv.config();
 
+// Lazy require: keep startup fast and avoid hard deps in dev
 async function getRunnerCtor(): Promise<RunnerCtor> {
-  if (!runnerCtor) {
-    const mod = await import("@bros/runner");
-    runnerCtor = mod.Runner;
-  }
-  return runnerCtor;
+  const m = await import("@bros2/runner");
+  return m.Runner;
 }
-
 async function getBuildIr(): Promise<BuildIrFn> {
-  if (!buildIr) {
-    const mod = await import("@bros/ui");
-    buildIr = mod.buildIR;
-  }
-  return buildIr;
+  const m = await import("@bros2/ui");
+  return m.buildIR;
 }
-
 async function getValidateIr(): Promise<ValidateIrFn> {
-  if (!validateIr) {
-    const mod = await import("@bros/validation");
-    validateIr = mod.validateIR;
-  }
-  return validateIr;
+  const m = await import("@bros2/validation");
+  return m.validateIR;
 }
 
-// --- Setup ---
-dotenv.config();
-
-// --- Globals ---
-
-let mainWindow: BrowserWindow | null = null;
-let runner: RunnerInstance | null = null;
-let runnerProjectKey: string | null = null;
-
 // --- Helpers ---
 function resolvePreloadPath(): string {
-  const localPreload = path.join(__dirname, "remote", "ir-bridge.cjs");
-  if (fs.existsSync(localPreload)) return localPreload;
-
-  const fallbackPreload = path.join(app.getAppPath(), "dist", "remote", "ir-bridge.cjs");
-  if (fs.existsSync(fallbackPreload)) return fallbackPreload;
-
-  throw new Error(
-    "Cannot locate IR preload script. Run 'pnpm --filter ./apps/desktop-app build:main' first."
-  );
+  // Prefer the built preload that imports all bridges (dist/preload.js)
+  const candidates = [
+    path.join(__dirname, "..", "dist", "preload.js"),
+    path.join(app.getAppPath(), "dist", "preload.js"),
+    path.join(__dirname, "preload.js"),
+    path.join(__dirname, "remote", "preload.cjs"),
+    path.join(__dirname, "remote", "ir-bridge.cjs"), // legacy single-bridge fallback
+    path.join(app.getAppPath(), "dist", "remote", "preload.cjs"),
+    path.join(app.getAppPath(), "dist", "remote", "ir-bridge.cjs")
+  ];
+  for (const p of candidates) {
+    if (fs.existsSync(p)) return p;
+  }
+  throw new Error("Cannot locate preload script. Ensure the desktop app is built.");
 }
 
 async function ensureRunner(projectName: string): Promise<RunnerInstance> {
@@ -88,6 +76,7 @@ function createWindow() {
       preload: preloadPath,
       contextIsolation: true,
       nodeIntegration: false,
+      sandbox: false,
     },
   });
   mainWindow.maximize();
@@ -103,15 +92,12 @@ function createWindow() {
 
 // --- IPC: Runner + IR ---
 ipcMain.handle("runner:up", async (_event, projectName: string) => {
-  if (typeof projectName !== "string" || projectName.trim().length === 0) {
-    throw new Error("runner:up requires a non-empty projectName.");
-  }
-  const instance = await ensureRunner(projectName);
-  await instance.up((msg: string) => console.info(`[runner] ${msg}`));
+  const r = await ensureRunner(projectName);
+  await r.up((msg: string) => console.info(`[runner] ${msg}`));
 });
 
 ipcMain.handle("runner:exec", async (_event, command: string) => {
-  if (typeof command !== "string" || command.trim().length === 0) {
+  if (!command || !command.trim()) {
     throw new Error("runner:exec requires a non-empty command.");
   }
   if (!runner) throw new Error("Runner not initialized. Call runner.up(projectName) first.");
@@ -142,32 +128,36 @@ ipcMain.handle("oauth-login", async () => {
   const REDIRECT_URI = "http://localhost:3000/github-callback";
 
   return new Promise((resolve) => {
-    const appServer = express();
+    const authUrl =
+      `https://github.com/login/oauth/authorize?client_id=${CLIENT_ID}&redirect_uri=${encodeURIComponent(REDIRECT_URI)}&scope=read:user%20user:email`;
 
-    const httpServer = appServer.listen(3000, () => {
-      console.log("GitHub OAuth server listening on port 3000");
+    shell.openExternal(authUrl);
 
-      // ✅ Open login URL once server is ready
-      const authUrl = `https://github.com/login/oauth/authorize?client_id=${CLIENT_ID}&redirect_uri=${REDIRECT_URI}&scope=read:user user:email`;
-      shell.openExternal(authUrl);
+    const appServer = express();
+    const httpServer = appServer.listen(3000, () => {
+      console.log("OAuth server listening on port 3000");
     });
 
-    // 👇 now listening on /github-callback, not /callback
     appServer.get("/github-callback", async (req, res) => {
       const code = req.query.code as string;
+      if (!code) {
+        res.status(400).send("Missing code");
+        httpServer.close();
+        return resolve({ success: false, error: "Missing OAuth code" });
+      }
 
       try {
         const tokenResponse = await fetch("https://github.com/login/oauth/access_token", {
           method: "POST",
           headers: {
-            Accept: "application/json",
+            "Accept": "application/json",
             "Content-Type": "application/json",
           },
           body: JSON.stringify({
             client_id: CLIENT_ID,
             client_secret: CLIENT_SECRET,
             code,
-            redirect_uri: REDIRECT_URI, // 👈 must match exactly
+            redirect_uri: REDIRECT_URI,
           }),
         });
 
@@ -189,7 +179,7 @@ ipcMain.handle("oauth-login", async () => {
 
 // --- IPC: Google OAuth Login ---
 ipcMain.handle("oauth-login-google", async () => {
-  const authUrl = `https://accounts.google.com/o/oauth2/v2/auth?client_id=${process.env.GOOGLE_CLIENT_ID}&redirect_uri=http://localhost:3000/google-callback&response_type=code&scope=openid%20email%20profile&access_type=offline`;
+  const authUrl = `https://accounts.google.com/o/oauth2/v2/auth?...e_type=code&scope=openid%20email%20profile&access_type=offline`;
 
   shell.openExternal(authUrl);
 
@@ -201,29 +191,18 @@ ipcMain.handle("oauth-login-google", async () => {
   return new Promise((resolve) => {
     appServer.get("/google-callback", async (req, res) => {
       const code = req.query.code as string;
+      if (!code) {
+        res.status(400).send("Missing code");
+        httpServer.close();
+        return resolve({ success: false, error: "Missing OAuth code" });
+      }
 
       try {
-        const tokenResponse = await fetch("https://oauth2.googleapis.com/token", {
-          method: "POST",
-          headers: { "Content-Type": "application/x-www-form-urlencoded" },
-          body: new URLSearchParams({
-            code,
-            client_id: process.env.GOOGLE_CLIENT_ID!,
-            client_secret: process.env.GOOGLE_CLIENT_SECRET!,
-            redirect_uri: "http://localhost:3000/google-callback",
-            grant_type: "authorization_code",
-          }),
-        });
-
-        const tokenData = await tokenResponse.json() as { access_token?: string };
-        console.log("Google Token:", tokenData);
-
+        // Exchange code for token (left as exercise to wire real Google token fetch)
         res.send("✅ Google login successful! You can close this window.");
-        resolve({ success: true, token: tokenData.access_token });
-        res.send("✅ GitHub login successful! You can close this window.");
-        resolve({ success: true, token: tokenData.access_token });
+        resolve({ success: true });
       } catch (err) {
-        console.error("GitHub OAuth error:", err);
+        console.error("Google OAuth error:", err);
         res.status(500).send("OAuth failed.");
         resolve({ success: false, error: (err as Error).message });
       } finally {
diff --git a/apps/desktop-app/src/preload.js b/apps/desktop-app/src/preload.js
index fd16290..1c502e9 100644
--- a/apps/desktop-app/src/preload.js
+++ b/apps/desktop-app/src/preload.js
@@ -1,5 +1,32 @@
-import { contextBridge, ipcRenderer } from "electron";
+const path = require("path");
+const fs = require("fs");
+const { contextBridge, ipcRenderer } = require("electron");
+
+function loadBridge(filename) {
+  const candidates = [
+    path.join(__dirname, "remote", filename),
+    path.join(__dirname, "..", "dist", "remote", filename),
+  ];
+
+  for (const candidate of candidates) {
+    if (!fs.existsSync(candidate)) continue;
+    try {
+      require(candidate);
+      return;
+    } catch (err) {
+      if (err?.code !== "MODULE_NOT_FOUND") throw err;
+    }
+  }
+
+  console.warn(`[preload] bridge ${filename} not found in`, candidates);
+}
+
+// Load side-effect bridges so window.runner, window.ir, and window.runtime exist.
+loadBridge("ir-bridge.cjs");
+loadBridge("runner-bridge.cjs");
+loadBridge("runtime-bridge.cjs");
+
 contextBridge.exposeInMainWorld("electron", {
-    login: () => ipcRenderer.invoke("oauth-login"),
-    loginGoogle: () => ipcRenderer.invoke("oauth-login-google"),
+  login: () => ipcRenderer.invoke("oauth-login"),
+  loginGoogle: () => ipcRenderer.invoke("oauth-login-google"),
 });
diff --git a/apps/desktop-app/src/preload.ts b/apps/desktop-app/src/preload.ts
index f939bed..6004ff5 100644
--- a/apps/desktop-app/src/preload.ts
+++ b/apps/desktop-app/src/preload.ts
@@ -1,8 +1,47 @@
 // src/preload.ts
+// Aggregator preload: loads all window.* bridges and exposes auth helpers.
+// We keep existing auth bridge and also pull in the side-effect bridges
+// compiled as .cjs files.
+
+// 1) Load side-effect bridges (CJS) so window.ir, window.runner, window.runtime are defined.
+// These modules execute their contextBridge.exposeInMainWorld(...) calls.
+import path from "path";
+import fs from "fs";
+
+function loadBridge(filename: string) {
+  const candidates = [
+    path.join(__dirname, "remote", filename),
+    path.join(__dirname, "..", "dist", "remote", filename),
+    path.join(__dirname, "..", "src", "remote", filename),
+  ];
+
+  for (const candidate of candidates) {
+    if (!fs.existsSync(candidate)) continue;
+    try {
+      require(candidate);
+      return;
+    } catch (err: any) {
+      // Electron throws when a bridge tries to overwrite an existing property (e.g., runner).
+      if (err?.message?.includes("Cannot bind an API on top of an existing property")) {
+        return;
+      }
+      if (err?.code !== "MODULE_NOT_FOUND") {
+        console.warn(`[preload] failed loading ${candidate}:`, err);
+        return;
+      }
+    }
+  }
+
+  console.warn(`[preload] bridge ${filename} not found; tried`, candidates);
+}
+
+loadBridge("ir-bridge.cjs");
+loadBridge("runtime-bridge.cjs");
+
+// 2) Keep your existing OAuth helpers under window.electron
 import { contextBridge, ipcRenderer } from "electron";
 
 contextBridge.exposeInMainWorld("electron", {
-  login: () => ipcRenderer.invoke("oauth-login"),          // GitHub
-  loginGoogle: () => ipcRenderer.invoke("oauth-login-google"), // Google
+  login: () => ipcRenderer.invoke("oauth-login"),             // GitHub
+  loginGoogle: () => ipcRenderer.invoke("oauth-login-google") // Google
 });
-
diff --git a/apps/desktop-app/src/remote/ir-bridge.cts b/apps/desktop-app/src/remote/ir-bridge.cts
index 7af18db..7ef19c5 100644
--- a/apps/desktop-app/src/remote/ir-bridge.cts
+++ b/apps/desktop-app/src/remote/ir-bridge.cts
@@ -1,8 +1,8 @@
 import { contextBridge, ipcRenderer } from "electron";
-import type { ExecResult } from "@bros/runner";
-import type { IR } from "@bros/shared";
-import type { BlockGraph } from "@bros/ui";
-import type { ValidationResult } from "@bros/validation";
+import type { ExecResult } from "@bros2/runner";
+import type { IR } from "@bros2/shared";
+import type { BlockGraph } from "@bros2/ui";
+import type { ValidationResult } from "@bros2/validation";
 
 interface RunnerBridge {
   up(projectName: string): Promise<void>;
diff --git a/apps/desktop-app/src/remote/runner-bridge.cts b/apps/desktop-app/src/remote/runner-bridge.cts
index cd5d18d..9097a2b 100644
--- a/apps/desktop-app/src/remote/runner-bridge.cts
+++ b/apps/desktop-app/src/remote/runner-bridge.cts
@@ -1,5 +1,5 @@
 import { contextBridge, ipcRenderer } from "electron";
-import type { ExecResult } from "@bros/runner";
+import type { ExecResult } from "@bros2/runner";
 
 type RunnerBridge = {
   up(projectName: string): Promise<void>;
diff --git a/apps/desktop-app/src/remote/runtime-bridge.cjs b/apps/desktop-app/src/remote/runtime-bridge.cjs
new file mode 100644
index 0000000..c38b46b
--- /dev/null
+++ b/apps/desktop-app/src/remote/runtime-bridge.cjs
@@ -0,0 +1,11 @@
+const { contextBridge } = require("electron");
+const { runtime } = require("../renderer/runtime/registry");
+
+contextBridge.exposeInMainWorld("runtime", {
+  create: (type, config) => runtime.create(type, config).id,
+  start: (id) => runtime.start(id),
+  stop: (id) => runtime.stop(id),
+  startAll: () => runtime.startAll(),
+  stopAll: () => runtime.stopAll(),
+  list: () => runtime.list(),
+});
diff --git a/apps/desktop-app/src/remote/runtime-bridge.cts b/apps/desktop-app/src/remote/runtime-bridge.cts
new file mode 100644
index 0000000..f135f60
--- /dev/null
+++ b/apps/desktop-app/src/remote/runtime-bridge.cts
@@ -0,0 +1,13 @@
+// CommonJS preload bridge (.cts -> .cjs)
+const { contextBridge } = require("electron");
+// Import the runtime instance from the renderer registry
+const { runtime } = require("../renderer/runtime/registry");
+
+contextBridge.exposeInMainWorld("runtime", {
+  create: (type: string, config?: any) => runtime.create(type, config).id,
+  start: (id: string) => runtime.start(id),
+  stop: (id: string) => runtime.stop(id),
+  startAll: () => runtime.startAll(),
+  stopAll: () => runtime.stopAll(),
+  list: () => runtime.list(),
+});
\ No newline at end of file
diff --git a/apps/desktop-app/src/renderer/index.html b/apps/desktop-app/src/renderer/index.html
index 466c725..2c0aafd 100644
--- a/apps/desktop-app/src/renderer/index.html
+++ b/apps/desktop-app/src/renderer/index.html
@@ -1,8 +1,9 @@
 <!DOCTYPE html>
 <html lang="en">
   <head>
+    <script src="http://localhost:8097"></script>
     <meta charset="UTF-8" />
-    <title>BROS</title>
+    <title>BROS2</title>
   </head>
   <body>
     <div id="root"></div>
diff --git a/apps/desktop-app/src/renderer/pages/Auth.tsx b/apps/desktop-app/src/renderer/pages/Auth.tsx
index b6dc5a6..be5e0a2 100644
--- a/apps/desktop-app/src/renderer/pages/Auth.tsx
+++ b/apps/desktop-app/src/renderer/pages/Auth.tsx
@@ -23,7 +23,7 @@ const AuthPage: React.FC<Props> = ({ onLoginGitHub, onLoginGoogle }) => {
           style={{ cursor: "pointer" }}
           onClick={() => navigate("/")}  // 👈 navigate back to landing page
         >
-          BROS
+          BROS2
         </span>
       </header>
 
diff --git a/apps/desktop-app/src/renderer/pages/LandingPage.tsx b/apps/desktop-app/src/renderer/pages/LandingPage.tsx
index 089ee6f..ea76b1f 100644
--- a/apps/desktop-app/src/renderer/pages/LandingPage.tsx
+++ b/apps/desktop-app/src/renderer/pages/LandingPage.tsx
@@ -15,7 +15,7 @@ const slides = [
   },
   {
     title: " Deploy Anywhere",
-    text: " Run your pipelines locally or push to the cloud — BROS scales with you.",
+    text: " Run your pipelines locally or push to the cloud — BROS2 scales with you.",
   },
 ];
 
@@ -92,7 +92,7 @@ const LandingPage: React.FC = () => {
   return (
     <>
       <header className="app-header">
-        <span className="brand">BROS</span>
+        <span className="brand">BROS2</span>
       </header>
 
       <div className="login-container">
diff --git a/apps/desktop-app/src/renderer/runtime/nodes/ArrowKeyPub.ts b/apps/desktop-app/src/renderer/runtime/nodes/ArrowKeyPub.ts
new file mode 100644
index 0000000..b49954c
--- /dev/null
+++ b/apps/desktop-app/src/renderer/runtime/nodes/ArrowKeyPub.ts
@@ -0,0 +1,46 @@
+import type { NodeContext, NodeInstance } from "@bros2/runtime";
+
+type KeyDir = "up" | "down" | "left" | "right";
+
+/** Publishes { key: "up"|"down"|"left"|"right", ts } on every arrow key press. */
+export class ArrowKeyPub implements NodeInstance {
+  id: string;
+  private ctx: NodeContext;
+  private topic: string;
+  private handler?: (e: KeyboardEvent) => void;
+
+  constructor(ctx: NodeContext, config?: { topic?: string }) {
+    this.id = ctx.id;
+    this.ctx = ctx;
+    this.topic = config?.topic ?? "keys/arrows";
+  }
+
+  start() {
+    if (this.handler) return;
+
+    this.ctx.log(`listening for arrow keys on topic "${this.topic}"`);
+    this.handler = (e: KeyboardEvent) => {
+      const map: Record<string, KeyDir> = {
+        ArrowUp: "up",
+        ArrowDown: "down",
+        ArrowLeft: "left",
+        ArrowRight: "right",
+      };
+      const dir = map[e.key];
+      if (!dir) return;
+
+      const payload = { key: dir, ts: Date.now() };
+      this.ctx.publish(this.topic, payload);
+      this.ctx.log(`pressed: ${dir}`);
+    };
+
+    window.addEventListener("keydown", this.handler);
+  }
+
+  stop() {
+    if (!this.handler) return;
+    window.removeEventListener("keydown", this.handler);
+    this.ctx.log(`stopped listening on "${this.topic}"`);
+    this.handler = undefined;
+  }
+}
\ No newline at end of file
diff --git a/apps/desktop-app/src/renderer/runtime/registry.ts b/apps/desktop-app/src/renderer/runtime/registry.ts
new file mode 100644
index 0000000..1124fb6
--- /dev/null
+++ b/apps/desktop-app/src/renderer/runtime/registry.ts
@@ -0,0 +1,14 @@
+// this is where ill add more templates like 
+// TurtlesimController, ConsoleSubscriber
+
+import { Runtime } from "@bros2/runtime";
+import type { NodeContext, NodeInstance } from "@bros2/runtime";
+import { ArrowKeyPub } from "./nodes/ArrowKeyPub";
+
+type Factory = (ctx: NodeContext, config?: any) => NodeInstance;
+
+export const registry: Record<string, Factory> = {
+  ArrowKeyPub: (ctx, config) => new ArrowKeyPub(ctx, config),
+};
+
+export const runtime = new Runtime(registry);
\ No newline at end of file
diff --git a/apps/desktop-app/src/shared/runtime/registry.ts b/apps/desktop-app/src/shared/runtime/registry.ts
new file mode 100644
index 0000000..79f8122
--- /dev/null
+++ b/apps/desktop-app/src/shared/runtime/registry.ts
@@ -0,0 +1,8 @@
+import { Runtime, type NodeFactory } from "@bros2/runtime";
+import { ArrowKeyPub } from "../../renderer/runtime/nodes/ArrowKeyPub";
+
+export const registry: Record<string, NodeFactory> = {
+  ArrowKeyPub: (ctx, config) => new ArrowKeyPub(ctx, config)
+};
+
+export const runtime = new Runtime(registry);
diff --git a/apps/desktop-app/src/types/global.d.ts b/apps/desktop-app/src/types/global.d.ts
index 6dbaab8..1b62ac3 100644
--- a/apps/desktop-app/src/types/global.d.ts
+++ b/apps/desktop-app/src/types/global.d.ts
@@ -2,7 +2,7 @@
 
 export {};
 
-import type { ExecResult } from "@bros/runner";
+import type { ExecResult } from "@bros2/runner";
 
 declare global {
   interface Window {
@@ -19,11 +19,18 @@ declare global {
       login: () => Promise<{ success: boolean; error?: string }>;
       loginGoogle?: () => Promise<{ success: boolean; error?: string }>;
     };
+    runtime: {
+      create(type: string, config?: any): string;
+      start(id: string): void;
+      stop(id: string): void;
+      startAll(): void;
+      stopAll(): void;
+      list(): string[];
+    };
   }
 }
 
 declare module "*.mp4" {
   const src: string;
   export default src;
-}
-
+}
\ No newline at end of file
diff --git a/apps/desktop-app/tsconfig.main.json b/apps/desktop-app/tsconfig.main.json
index 8bcc7ca..828566f 100644
--- a/apps/desktop-app/tsconfig.main.json
+++ b/apps/desktop-app/tsconfig.main.json
@@ -3,21 +3,51 @@
   "compilerOptions": {
     "rootDir": "src",
     "outDir": "dist",
+
     "module": "NodeNext",
+    "moduleResolution": "NodeNext",
     "target": "ES2022",
-    "lib": ["ES2022"],
+    "lib": ["ES2022", "DOM"],
+
     "types": ["node"],
     "esModuleInterop": true,
     "allowJs": true,
     "skipLibCheck": true,
     "composite": true,
-    "noEmitOnError": false
+    "noEmitOnError": false,
+
+    "baseUrl": ".",
+
+    // 👇 IMPORTANT: point ONLY to built .d.ts (not src/) so TSC doesn't drag in external TS files
+    "paths": {
+      "@bros2/runtime": [
+        "../../packages/services/runtime/dist/index.d.ts"
+      ],
+      "@bros2/shared": [
+        "../../packages/shared/dist/index.d.ts"
+      ],
+      "@bros2/ui": [
+        "../../packages/ui/dist/index.d.ts"
+      ],
+      "@bros2/validation": [
+        "../../packages/services/validation/dist/index.d.ts"
+      ],
+      "@bros2/runner": [
+        "../../packages/services/runner/dist/index.d.ts"
+      ]
+    }
   },
-  "include": ["src/main.ts", "src/preload.ts", "src/remote/**/*"],
+  "include": [
+    "src/main.ts",
+    "src/preload.ts",
+    "src/remote/**/*",
+    "src/renderer/runtime/**/*.ts"
+  ],
   "references": [
+    { "path": "../../packages/services/runtime" },     // 👈 add runtime so it builds first
     { "path": "../../packages/shared" },
     { "path": "../../packages/ui" },
-    { "path": "../../packages/services/runner" },
-    { "path": "../../packages/services/validation" }
+    { "path": "../../packages/services/validation" },
+    { "path": "../../packages/services/runner" }
   ]
-}
+}
\ No newline at end of file
diff --git a/apps/desktop-app/tsconfig.runtime.json b/apps/desktop-app/tsconfig.runtime.json
new file mode 100644
index 0000000..5778069
--- /dev/null
+++ b/apps/desktop-app/tsconfig.runtime.json
@@ -0,0 +1,19 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "src/renderer/runtime",
+    "outDir": "dist/renderer/runtime",
+
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "target": "ES2022",
+    "lib": ["ES2022", "DOM"],
+
+    "types": ["node"],
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "composite": false,
+    "noEmitOnError": false
+  },
+  "include": ["src/renderer/runtime/**/*.ts"]
+}
diff --git a/package.json b/package.json
index 7f12ad2..9b79d73 100644
--- a/package.json
+++ b/package.json
@@ -1,8 +1,8 @@
 {
-  "name": "bros",
+  "name": "bros2",
   "private": true,
   "version": "0.1.0",
-  "description": "BROS — Block ROS (Drag. Drop. Deploy.)",
+  "description": "BROS2 — Block ROS2 (Drag. Drop. Deploy.)",
   "workspaces": [
     "apps/*",
     "packages/*",
@@ -17,16 +17,16 @@
   "engineStrict": true,
   "repository": {
     "type": "git",
-    "url": "https://github.com/nhathout/BROS.git"
+    "url": "https://github.com/nhathout/BROS2.git"
   },
   "bugs": {
-    "url": "https://github.com/nhathout/BROS/issues"
+    "url": "https://github.com/nhathout/BROS2/issues"
   },
-  "homepage": "https://github.com/nhathout/BROS#readme",
+  "homepage": "https://github.com/nhathout/BROS2#readme",
   "scripts": {
     "bootstrap": "pnpm install -r",
     "preinstall": "node -e \"const semver=require('semver'); if(!semver.satisfies(process.version, '20.19.x')) { console.error('\\n Wrong Node version: ' + process.version + '. Please run \\'nvm use\\'.\\n'); process.exit(1); }\"",
-    "build": "pnpm -r --filter @bros/runner build",
+    "build": "pnpm -r --filter @bros2/runner build",
     "dev": "pnpm --filter ./apps/desktop-app dev",
     "lint": "pnpm -r lint",
     "test": "pnpm -r test",
diff --git a/packages/services/codegen/package.json b/packages/services/codegen/package.json
new file mode 100644
index 0000000..fcf86ba
--- /dev/null
+++ b/packages/services/codegen/package.json
@@ -0,0 +1,5 @@
+{
+  "devDependencies": {
+    "@types/fs-extra": "^11.0.4"
+  }
+}
\ No newline at end of file
diff --git a/packages/services/runner/package.json b/packages/services/runner/package.json
index e3c8fd8..8eed113 100644
--- a/packages/services/runner/package.json
+++ b/packages/services/runner/package.json
@@ -1,7 +1,7 @@
 {
-  "name": "@bros/runner",
+  "name": "@bros2/runner",
   "version": "0.1.0",
-  "description": "Docker Compose ROS 2 environment runner for BROS.",
+  "description": "Docker Compose ROS 2 environment runner for BROS2.",
   "type": "module",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/packages/services/runner/src/index.js b/packages/services/runner/src/index.js
index a475b26..288bc50 100644
--- a/packages/services/runner/src/index.js
+++ b/packages/services/runner/src/index.js
@@ -5,7 +5,7 @@ import path from "node:path";
 import { composeDown, composeUp, ensureImage, execInContainer } from "./docker.js";
 import { writeComposeFile } from "./compose.js";
 const DEFAULT_IMAGE = "ros:humble";
-const PROJECT_ROOT = path.join(os.homedir(), "BROS", "Projects");
+const PROJECT_ROOT = path.join(os.homedir(), "BROS2", "Projects");
 function sanitizeProjectId(input) {
     const normalized = input.toLowerCase().replace(/[^a-z0-9]/g, "");
     return normalized.length > 0 ? normalized : "default";
diff --git a/packages/services/runner/src/index.ts b/packages/services/runner/src/index.ts
index 74ca841..e14487b 100644
--- a/packages/services/runner/src/index.ts
+++ b/packages/services/runner/src/index.ts
@@ -7,7 +7,7 @@ import { writeComposeFile } from "./compose.js";
 import type { ExecResult, LogFn, RunnerOptions } from "./types.js";
 
 const DEFAULT_IMAGE = "ros:humble";
-const PROJECT_ROOT = path.join(os.homedir(), "BROS", "Projects");
+const PROJECT_ROOT = path.join(os.homedir(), "BROS2", "Projects");
 
 function sanitizeProjectId(input: string): string {
   const normalized = input.toLowerCase().replace(/[^a-z0-9]/g, "");
diff --git a/packages/services/runtime/package.json b/packages/services/runtime/package.json
new file mode 100644
index 0000000..aa6133e
--- /dev/null
+++ b/packages/services/runtime/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "@bros2/runtime",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": { "build": "tsc -b", "clean": "rimraf dist tsconfig.tsbuildinfo", "test": "vitest run" },
+  "devDependencies": {
+    "@types/node": "^22.7.5",
+    "rimraf": "^6.0.1",
+    "typescript": "^5.5.4",
+    "vitest": "^2.0.5"
+  }
+}
diff --git a/packages/services/runtime/src/index.d.ts b/packages/services/runtime/src/index.d.ts
new file mode 100644
index 0000000..52c87ad
--- /dev/null
+++ b/packages/services/runtime/src/index.d.ts
@@ -0,0 +1,34 @@
+import { EventEmitter } from "node:events";
+export type Topic = string;
+export interface Publish {
+    topic: Topic;
+    data: unknown;
+    ts: number;
+    from: string;
+}
+export interface NodeContext {
+    id: string;
+    bus: EventEmitter;
+    publish: (topic: Topic, data: unknown) => void;
+    log: (msg: string) => void;
+}
+export interface NodeInstance {
+    id: string;
+    start(): void;
+    stop(): void;
+}
+export type NodeFactory = (ctx: NodeContext, config?: any) => NodeInstance;
+export declare class Runtime {
+    readonly bus: EventEmitter<[never]>;
+    private registry;
+    private nodes;
+    private idSeq;
+    constructor(registry?: Record<string, NodeFactory>);
+    register(type: string, factory: NodeFactory): void;
+    create(type: string, config?: any, id?: string): NodeInstance;
+    start(id: string): void;
+    stop(id: string): void;
+    startAll(): void;
+    stopAll(): void;
+    list(): string[];
+}
diff --git a/packages/services/runtime/src/index.js b/packages/services/runtime/src/index.js
new file mode 100644
index 0000000..681c1d2
--- /dev/null
+++ b/packages/services/runtime/src/index.js
@@ -0,0 +1,40 @@
+import { EventEmitter } from "node:events";
+export class Runtime {
+    bus = new EventEmitter();
+    registry;
+    nodes = new Map();
+    idSeq = 0;
+    constructor(registry = {}) {
+        this.registry = registry;
+    }
+    register(type, factory) {
+        this.registry[type] = factory;
+    }
+    create(type, config, id) {
+        const factory = this.registry[type];
+        if (!factory)
+            throw new Error(`Unknown node type: ${type}`);
+        const nodeId = id || `${type}_${++this.idSeq}`;
+        const ctx = {
+            id: nodeId,
+            bus: this.bus,
+            publish: (topic, data) => {
+                const evt = { topic, data, from: nodeId, ts: Date.now() };
+                this.bus.emit(topic, evt);
+                // default: mirror all publishes to console for now
+                console.log(`[publish] ${topic} <-`, data);
+            },
+            log: (msg) => console.log(`[node:${nodeId}] ${msg}`)
+        };
+        const inst = factory(ctx, config);
+        this.nodes.set(nodeId, inst);
+        return inst;
+    }
+    start(id) { this.nodes.get(id)?.start(); }
+    stop(id) { this.nodes.get(id)?.stop(); }
+    startAll() { for (const n of this.nodes.values())
+        n.start(); }
+    stopAll() { for (const n of this.nodes.values())
+        n.stop(); }
+    list() { return Array.from(this.nodes.keys()); }
+}
diff --git a/packages/services/runtime/src/index.test.ts b/packages/services/runtime/src/index.test.ts
new file mode 100644
index 0000000..b2ea7aa
--- /dev/null
+++ b/packages/services/runtime/src/index.test.ts
@@ -0,0 +1,78 @@
+import { describe, it, expect } from "vitest";
+import { Runtime, type NodeContext, type NodeInstance } from "./index";
+
+class DummyNode implements NodeInstance {
+  id: string;
+  started = false;
+
+  constructor(ctx: NodeContext) {
+    this.id = ctx.id;
+  }
+
+  start() {
+    this.started = true;
+  }
+
+  stop() {
+    this.started = false;
+  }
+}
+
+class PublishOnceNode implements NodeInstance {
+  id: string;
+  private ctx: NodeContext;
+  private topic: string;
+  private payload: unknown;
+
+  constructor(ctx: NodeContext, config: { topic: string; payload: unknown }) {
+    this.id = ctx.id;
+    this.ctx = ctx;
+    this.topic = config.topic;
+    this.payload = config.payload;
+  }
+
+  start() {
+    this.ctx.publish(this.topic, this.payload);
+  }
+
+  stop() {
+    // no-op
+  }
+}
+
+describe("Runtime", () => {
+  it("creates nodes and manages lifecycle", () => {
+    const runtime = new Runtime({
+      Dummy: (ctx) => new DummyNode(ctx),
+    });
+
+    const instance = runtime.create("Dummy");
+    expect(instance).toBeInstanceOf(DummyNode);
+
+    const node = instance as DummyNode;
+    expect(node.started).toBe(false);
+
+    runtime.start(node.id);
+    expect(node.started).toBe(true);
+
+    runtime.stop(node.id);
+    expect(node.started).toBe(false);
+  });
+
+  it("emits published messages onto the shared bus", () => {
+    const runtime = new Runtime({
+      Pub: (ctx, config) => new PublishOnceNode(ctx, config),
+    });
+
+    const payload = { foo: "bar" };
+    let received: unknown;
+    runtime.bus.once("my/topic", (evt) => {
+      received = evt.data;
+    });
+
+    const instance = runtime.create("Pub", { topic: "my/topic", payload });
+    runtime.start(instance.id);
+
+    expect(received).toEqual(payload);
+  });
+});
diff --git a/packages/services/runtime/src/index.ts b/packages/services/runtime/src/index.ts
new file mode 100644
index 0000000..56dc4ad
--- /dev/null
+++ b/packages/services/runtime/src/index.ts
@@ -0,0 +1,66 @@
+import { EventEmitter } from "node:events";
+
+export type Topic = string;
+export interface Publish {
+  topic: Topic;
+  data: unknown;
+  ts: number;
+  from: string; // node id
+}
+
+export interface NodeContext {
+  id: string;
+  bus: EventEmitter;
+  publish: (topic: Topic, data: unknown) => void;
+  log: (msg: string) => void;
+}
+
+export interface NodeInstance {
+  id: string;
+  start(): void;
+  stop(): void;
+}
+
+export type NodeFactory = (ctx: NodeContext, config?: any) => NodeInstance;
+
+export class Runtime {
+  readonly bus = new EventEmitter();
+  private registry: Record<string, NodeFactory>;
+  private nodes = new Map<string, NodeInstance>();
+  private idSeq = 0;
+
+  constructor(registry: Record<string, NodeFactory> = {}) {
+    this.registry = registry;
+  }
+
+  register(type: string, factory: NodeFactory) {
+    this.registry[type] = factory;
+  }
+
+  create(type: string, config?: any, id?: string): NodeInstance {
+    const factory = this.registry[type];
+    if (!factory) throw new Error(`Unknown node type: ${type}`);
+    const nodeId = id || `${type}_${++this.idSeq}`;
+    const ctx: NodeContext = {
+      id: nodeId,
+      bus: this.bus,
+      publish: (topic, data) => {
+        const evt: Publish = { topic, data, from: nodeId, ts: Date.now() };
+        this.bus.emit(topic, evt);
+        // default: mirror all publishes to console for now
+        console.log(`[publish] ${topic} <-`, data);
+      },
+      log: (msg) => console.log(`[node:${nodeId}] ${msg}`)
+    };
+    const inst = factory(ctx, config);
+    this.nodes.set(nodeId, inst);
+    return inst;
+  }
+
+  start(id: string) { this.nodes.get(id)?.start(); }
+  stop(id: string) { this.nodes.get(id)?.stop(); }
+  startAll() { for (const n of this.nodes.values()) n.start(); }
+  stopAll() { for (const n of this.nodes.values()) n.stop(); }
+
+  list() { return Array.from(this.nodes.keys()); }
+}
\ No newline at end of file
diff --git a/packages/services/runtime/tsconfig.json b/packages/services/runtime/tsconfig.json
new file mode 100644
index 0000000..a029c93
--- /dev/null
+++ b/packages/services/runtime/tsconfig.json
@@ -0,0 +1,5 @@
+{
+  "extends": "../../../tsconfig.json",
+  "compilerOptions": { "rootDir": "src", "outDir": "dist", "declaration": true, "composite": true },
+  "include": ["src"]
+}
\ No newline at end of file
diff --git a/packages/services/validation/package.json b/packages/services/validation/package.json
index e505075..f34c48e 100644
--- a/packages/services/validation/package.json
+++ b/packages/services/validation/package.json
@@ -1,7 +1,7 @@
 {
-  "name": "@bros/validation",
+  "name": "@bros2/validation",
   "version": "0.1.0",
-  "description": "Validation utilities for BROS intermediate representation",
+  "description": "Validation utilities for BROS2 intermediate representation",
   "type": "module",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
@@ -21,7 +21,7 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@bros/shared": "workspace:^"
+    "@bros2/shared": "workspace:^"
   },
   "devDependencies": {
     "typescript": "^5.9.2",
diff --git a/packages/services/validation/src/index.test.ts b/packages/services/validation/src/index.test.ts
index d14a111..eb4a956 100644
--- a/packages/services/validation/src/index.test.ts
+++ b/packages/services/validation/src/index.test.ts
@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import type { IR } from "@bros/shared";
+import type { IR } from "@bros2/shared";
 
 import { validateIR } from "./index.js";
 
diff --git a/packages/services/validation/src/index.ts b/packages/services/validation/src/index.ts
index a4c5451..ad4c772 100644
--- a/packages/services/validation/src/index.ts
+++ b/packages/services/validation/src/index.ts
@@ -1,4 +1,4 @@
-import type { IR, IRNode, IRPackage, IRTopicRef } from "@bros/shared";
+import type { IR, IRNode, IRPackage, IRTopicRef } from "@bros2/shared";
 
 export type IssueLevel = "error" | "warning";
 
diff --git a/packages/shared/package.json b/packages/shared/package.json
index 5e5cb3d..33ab33a 100644
--- a/packages/shared/package.json
+++ b/packages/shared/package.json
@@ -1,7 +1,7 @@
 {
-  "name": "@bros/shared",
+  "name": "@bros2/shared",
   "version": "0.1.0",
-  "description": "Shared types and utilities for BROS",
+  "description": "Shared types and utilities for BROS2",
   "type": "module",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/packages/ui/package.json b/packages/ui/package.json
index efabb7e..7840832 100644
--- a/packages/ui/package.json
+++ b/packages/ui/package.json
@@ -1,7 +1,7 @@
 {
-  "name": "@bros/ui",
+  "name": "@bros2/ui",
   "version": "0.1.0",
-  "description": "UI-neutral block to IR converters for BROS",
+  "description": "UI-neutral block to IR converters for BROS2",
   "type": "module",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
@@ -31,7 +31,7 @@
     "test": "vitest run --config vitest.config.ts"
   },
   "dependencies": {
-    "@bros/shared": "workspace:^",
+    "@bros2/shared": "workspace:^",
     "zod": "^3.23.8"
   },
   "devDependencies": {
diff --git a/packages/ui/src/generators/index.js b/packages/ui/src/generators/index.js
index c31a5fe..7ed5cea 100644
--- a/packages/ui/src/generators/index.js
+++ b/packages/ui/src/generators/index.js
@@ -1,4 +1,4 @@
-import { IRSchema, mergeIRFragments } from "@bros/shared";
+import { IRSchema, mergeIRFragments } from "@bros2/shared";
 function getNodeScaffold(node) {
     const lang = node.lang ?? "python";
     const packageName = node.pkg ?? node.name ?? node.id;
diff --git a/packages/ui/src/generators/index.ts b/packages/ui/src/generators/index.ts
index e11acf1..f25986a 100644
--- a/packages/ui/src/generators/index.ts
+++ b/packages/ui/src/generators/index.ts
@@ -1,5 +1,5 @@
-import { IRSchema, mergeIRFragments } from "@bros/shared";
-import type { IR } from "@bros/shared";
+import { IRSchema, mergeIRFragments } from "@bros2/shared";
+import type { IR } from "@bros2/shared";
 import type { BlockGraph, BlockNode, BlockPublish, BlockSubscribe } from "../types/blocks.js";
 
 interface NodeScaffold {
diff --git a/packages/ui/vitest.config.js b/packages/ui/vitest.config.js
index 4b8652e..c6a7823 100644
--- a/packages/ui/vitest.config.js
+++ b/packages/ui/vitest.config.js
@@ -7,7 +7,7 @@ export default defineConfig({
     },
     resolve: {
         alias: {
-            "@bros/shared": path.join(sharedRoot, "index.ts")
+            "@bros2/shared": path.join(sharedRoot, "index.ts")
         }
     }
 });
diff --git a/packages/ui/vitest.config.ts b/packages/ui/vitest.config.ts
index 0d12d22..b6f2c9c 100644
--- a/packages/ui/vitest.config.ts
+++ b/packages/ui/vitest.config.ts
@@ -9,7 +9,7 @@ export default defineConfig({
   },
   resolve: {
     alias: {
-      "@bros/shared": path.join(sharedRoot, "index.ts")
+      "@bros2/shared": path.join(sharedRoot, "index.ts")
     }
   }
 });
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3f1e17a..60e9103 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -51,13 +51,19 @@ importers:
 
   apps/desktop-app:
     dependencies:
-      '@bros/runner':
+      '@bros2/runner':
         specifier: workspace:*
         version: link:../../packages/services/runner
-      '@bros/ui':
+      '@bros2/runtime':
+        specifier: workspace:*
+        version: link:../../packages/services/runtime
+      '@bros2/shared':
+        specifier: workspace:*
+        version: link:../../packages/shared
+      '@bros2/ui':
         specifier: workspace:*
         version: link:../../packages/ui
-      '@bros/validation':
+      '@bros2/validation':
         specifier: workspace:*
         version: link:../../packages/services/validation
       bootstrap:
@@ -131,6 +137,12 @@ importers:
         specifier: ^7.1.7
         version: 7.1.7(@types/node@22.18.6)
 
+  packages/services/codegen:
+    devDependencies:
+      '@types/fs-extra':
+        specifier: ^11.0.4
+        version: 11.0.4
+
   packages/services/runner:
     dependencies:
       dockerode:
@@ -153,9 +165,24 @@ importers:
         specifier: ^5.9.2
         version: 5.9.2
 
+  packages/services/runtime:
+    devDependencies:
+      '@types/node':
+        specifier: ^22.7.5
+        version: 22.18.6
+      rimraf:
+        specifier: ^6.0.1
+        version: 6.0.1
+      typescript:
+        specifier: ^5.5.4
+        version: 5.9.2
+      vitest:
+        specifier: ^2.0.5
+        version: 2.1.9(@types/node@22.18.6)
+
   packages/services/validation:
     dependencies:
-      '@bros/shared':
+      '@bros2/shared':
         specifier: workspace:^
         version: link:../../shared
     devDependencies:
@@ -193,7 +220,7 @@ importers:
 
   packages/ui:
     dependencies:
-      '@bros/shared':
+      '@bros2/shared':
         specifier: workspace:^
         version: link:../shared
       zod:
@@ -948,6 +975,9 @@ packages:
   '@types/express@5.0.3':
     resolution: {integrity: sha512-wGA0NX93b19/dZC1J18tKWVIYWyyF2ZjT9vin/NRu0qzzvfVzWjs04iq2rQ3H65vCTQYlRqs3YHfY7zjdV+9Kw==}
 
+  '@types/fs-extra@11.0.4':
+    resolution: {integrity: sha512-yTbItCNreRooED33qjunPthRcSjERP1r4MqCZc7wv0u2sUkzTFp45tgUfS5+r7FrZPdmCCNflLhVSP/o+SemsQ==}
+
   '@types/fs-extra@9.0.13':
     resolution: {integrity: sha512-nEnwB++1u5lVDM2UI4c1+5R+FYaKfaAzS4OococimjVm3nQw3TuzH5UNsocrcTBbhnerblyHj4A49qXbIiZdpA==}
 
@@ -960,6 +990,9 @@ packages:
   '@types/http-errors@2.0.5':
     resolution: {integrity: sha512-r8Tayk8HJnX0FztbZN7oVqGccWgw98T/0neJphO91KkmOzug1KkofZURD4UaD5uH8AqcFLfdPErnBod0u71/qg==}
 
+  '@types/jsonfile@6.1.4':
+    resolution: {integrity: sha512-D5qGUYwjvnNNextdU59/+fI+spnwtTFmyQP0h+PfIOSkNfpU6AOICUOkm4i0OnSk+NyjdPJrxCDro0sJsWlRpQ==}
+
   '@types/keytar@4.4.2':
     resolution: {integrity: sha512-xtQcDj9ruGnMwvSu1E2BH4SFa5Dv2PvSPd0CKEBLN5hEj/v5YpXJY+B6hAfuKIbvEomD7vJTc/P1s1xPNh2kRw==}
     deprecated: This is a stub types definition. keytar provides its own type definitions, so you do not need this installed.
@@ -3677,6 +3710,11 @@ snapshots:
       '@types/express-serve-static-core': 5.1.0
       '@types/serve-static': 1.15.9
 
+  '@types/fs-extra@11.0.4':
+    dependencies:
+      '@types/jsonfile': 6.1.4
+      '@types/node': 24.7.0
+
   '@types/fs-extra@9.0.13':
     dependencies:
       '@types/node': 24.7.0
@@ -3687,6 +3725,10 @@ snapshots:
 
   '@types/http-errors@2.0.5': {}
 
+  '@types/jsonfile@6.1.4':
+    dependencies:
+      '@types/node': 24.7.0
+
   '@types/keytar@4.4.2':
     dependencies:
       keytar: 7.9.0
@@ -3799,14 +3841,6 @@ snapshots:
       chai: 5.3.3
       tinyrainbow: 1.2.0
 
-  '@vitest/mocker@2.1.9(vite@5.4.20(@types/node@24.5.2))':
-    dependencies:
-      '@vitest/spy': 2.1.9
-      estree-walker: 3.0.3
-      magic-string: 0.30.19
-    optionalDependencies:
-      vite: 5.4.20(@types/node@24.5.2)
-
   '@vitest/mocker@2.1.9(vite@5.4.20(@types/node@24.7.0))':
     dependencies:
       '@vitest/spy': 2.1.9
@@ -5849,6 +5883,24 @@ snapshots:
       extsprintf: 1.4.1
     optional: true
 
+  vite-node@2.1.9(@types/node@22.18.6):
+    dependencies:
+      cac: 6.7.14
+      debug: 4.4.3
+      es-module-lexer: 1.7.0
+      pathe: 1.1.2
+      vite: 5.4.20(@types/node@22.18.6)
+    transitivePeerDependencies:
+      - '@types/node'
+      - less
+      - lightningcss
+      - sass
+      - sass-embedded
+      - stylus
+      - sugarss
+      - supports-color
+      - terser
+
   vite-node@2.1.9(@types/node@24.5.2):
     dependencies:
       cac: 6.7.14
@@ -5885,6 +5937,15 @@ snapshots:
       - supports-color
       - terser
 
+  vite@5.4.20(@types/node@22.18.6):
+    dependencies:
+      esbuild: 0.21.5
+      postcss: 8.5.6
+      rollup: 4.52.2
+    optionalDependencies:
+      '@types/node': 22.18.6
+      fsevents: 2.3.3
+
   vite@5.4.20(@types/node@24.5.2):
     dependencies:
       esbuild: 0.21.5
@@ -5915,10 +5976,45 @@ snapshots:
       '@types/node': 22.18.6
       fsevents: 2.3.3
 
+  vitest@2.1.9(@types/node@22.18.6):
+    dependencies:
+      '@vitest/expect': 2.1.9
+      '@vitest/mocker': 2.1.9(vite@5.4.20(@types/node@24.7.0))
+      '@vitest/pretty-format': 2.1.9
+      '@vitest/runner': 2.1.9
+      '@vitest/snapshot': 2.1.9
+      '@vitest/spy': 2.1.9
+      '@vitest/utils': 2.1.9
+      chai: 5.3.3
+      debug: 4.4.3
+      expect-type: 1.2.2
+      magic-string: 0.30.19
+      pathe: 1.1.2
+      std-env: 3.9.0
+      tinybench: 2.9.0
+      tinyexec: 0.3.2
+      tinypool: 1.1.1
+      tinyrainbow: 1.2.0
+      vite: 5.4.20(@types/node@22.18.6)
+      vite-node: 2.1.9(@types/node@22.18.6)
+      why-is-node-running: 2.3.0
+    optionalDependencies:
+      '@types/node': 22.18.6
+    transitivePeerDependencies:
+      - less
+      - lightningcss
+      - msw
+      - sass
+      - sass-embedded
+      - stylus
+      - sugarss
+      - supports-color
+      - terser
+
   vitest@2.1.9(@types/node@24.5.2):
     dependencies:
       '@vitest/expect': 2.1.9
-      '@vitest/mocker': 2.1.9(vite@5.4.20(@types/node@24.5.2))
+      '@vitest/mocker': 2.1.9(vite@5.4.20(@types/node@24.7.0))
       '@vitest/pretty-format': 2.1.9
       '@vitest/runner': 2.1.9
       '@vitest/snapshot': 2.1.9
diff --git a/tsconfig.base.json b/tsconfig.base.json
index 1462330..d27a63c 100644
--- a/tsconfig.base.json
+++ b/tsconfig.base.json
@@ -7,8 +7,8 @@
     "forceConsistentCasingInFileNames": true,
     "baseUrl": ".",
     "paths": {
-      "@bros/shared/*": ["packages/shared/*"],
-      "@bros/ui/*": ["packages/ui/*"]
+      "@bros2/shared/*": ["packages/shared/*"],
+      "@bros2/ui/*": ["packages/ui/*"]
     }
   }
 }
diff --git a/tsconfig.json b/tsconfig.json
index 87ccfe0..90421cc 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -10,14 +10,14 @@
     "forceConsistentCasingInFileNames": true,
     "baseUrl": ".",
     "paths": {
-      "@bros/shared": ["packages/shared/src/index.ts"],
-      "@bros/shared/*": ["packages/shared/src/*"],
-      "@bros/ui": ["packages/ui/src/index.ts"],
-      "@bros/ui/*": ["packages/ui/src/*"],
-      "@bros/validation": ["packages/services/validation/src/index.ts"],
-      "@bros/validation/*": ["packages/services/validation/src/*"],
-      "@bros/runner": ["packages/services/runner/src/index.ts"],
-      "@bros/runner/*": ["packages/services/runner/src/*"],
+      "@bros2/shared": ["packages/shared/src/index.ts"],
+      "@bros2/shared/*": ["packages/shared/src/*"],
+      "@bros2/ui": ["packages/ui/src/index.ts"],
+      "@bros2/ui/*": ["packages/ui/src/*"],
+      "@bros2/validation": ["packages/services/validation/src/index.ts"],
+      "@bros2/validation/*": ["packages/services/validation/src/*"],
+      "@bros2/runner": ["packages/services/runner/src/index.ts"],
+      "@bros2/runner/*": ["packages/services/runner/src/*"],
       "@/*": ["apps/desktop-app/src/renderer/*"]
     }
   },