diff --git a/src/runner/remoteExecution/rollup.config.mjs b/src/runner/remoteExecution/rollup.config.mjs
index 75b8ba5..4669a82 100644
--- a/src/runner/remoteExecution/rollup.config.mjs
+++ b/src/runner/remoteExecution/rollup.config.mjs
@@ -2,21 +2,24 @@ import nodeResolve from "@rollup/plugin-node-resolve";
 import terser from "@rollup/plugin-terser";
 import typescript from "@rollup/plugin-typescript";
 
-/**
- * @type {import('rollup').RollupOptions}
- */
-export default {
-  input: "src/index.ts",
-  external: id => id.includes("py-slang"),
-  output: [
-    {
-      file: "dist/index.cjs",
-      format: "cjs",
+export default [
+  // existing build
+  {
+    input: "src/index.ts",
+    external: id => id.includes("py-slang"),
+    output: [
+      { file: "dist/index.cjs", format: "cjs" },
+      { file: "dist/index.mjs", format: "esm" },
+    ],
+    plugins: [nodeResolve(), typescript(), terser()],
+  },
+  // new EV3 conductor worker bundle
+  {
+    input: "src/entry.ts",
+    output: {
+      file: "dist/ev3-pyslang.js",
+      format: "iife", // self-contained for Web Worker
     },
-    {
-      file: "dist/index.mjs",
-      format: "esm",
-    },
-  ],
-  plugins: [nodeResolve(), typescript(), terser()],
-};
+    plugins: [nodeResolve(), typescript(), terser()],
+  },
+];
diff --git a/src/runner/remoteExecution/src/Ev3Evaluator.ts b/src/runner/remoteExecution/src/Ev3Evaluator.ts
new file mode 100644
index 0000000..e69de29
diff --git a/src/runner/remoteExecution/src/entry.ts b/src/runner/remoteExecution/src/entry.ts
new file mode 100644
index 0000000..e69de29
diff --git a/yarn.lock b/yarn.lock
index 00fcdd0..4fdb640 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5987,6 +5987,23 @@ __metadata:
   languageName: node
   linkType: hard
 
+"railroad-diagrams@npm:^1.0.0":
+  version: 1.0.0
+  resolution: "railroad-diagrams@npm:1.0.0"
+  checksum: 10c0/81bf8f86870a69fb9ed243102db9ad6416d09c4cb83964490d44717690e07dd982f671503236a1f8af28f4cb79d5d7a87613930f10ac08defa845ceb6764e364
+  languageName: node
+  linkType: hard
+
+"randexp@npm:0.4.6":
+  version: 0.4.6
+  resolution: "randexp@npm:0.4.6"
+  dependencies:
+    discontinuous-range: "npm:1.0.0"
+    ret: "npm:~0.1.10"
+  checksum: 10c0/14ee14b6d7f5ce69609b51cc914fb7a7c82ad337820a141c5f762c5ad1fe868f5191ea6e82359aee019b625ee1359486628fa833909d12c3b5dd9571908c3345
+  languageName: node
+  linkType: hard
+
 "read-yaml-file@npm:^1.1.0":
   version: 1.1.0
   resolution: "read-yaml-file@npm:1.1.0"