diff --git a/.gitignore b/.gitignore
index 995c13c0..7260c908 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,5 +18,6 @@ todo/
 .docs-test-tmp/
 src/commands/python3/worker.js
 src/commands/js-exec/worker.js
+src/commands/js-exec/js-exec-worker.js
 fuzz-*.log
 .claude/settings.local.json
diff --git a/package.json b/package.json
index fb4b794b..830de283 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
   "scripts": {
     "build": "rm -rf dist && tsc && pnpm build:lib && pnpm build:lib:cjs && pnpm build:browser && pnpm build:cli && pnpm build:shell && pnpm build:worker && pnpm build:clean && cp dist/index.d.ts dist/index.d.cts && sed '1,/^-->/d' AGENTS.npm.md > dist/AGENTS.md",
     "build:clean": "find dist -name '*.test.js' -delete && find dist -name '*.test.d.ts' -delete",
-    "build:worker": "esbuild src/commands/python3/worker.ts --bundle --platform=node --format=esm --outfile=src/commands/python3/worker.js --external:../../../vendor/cpython-emscripten/* && cp src/commands/python3/worker.js dist/commands/python3/worker.js && mkdir -p dist/bin/chunks && cp src/commands/python3/worker.js dist/bin/chunks/worker.js && mkdir -p dist/bundle/chunks && cp src/commands/python3/worker.js dist/bundle/chunks/worker.js && esbuild src/commands/js-exec/worker.ts --bundle --platform=node --format=esm --outfile=src/commands/js-exec/worker.js --external:quickjs-emscripten && cp src/commands/js-exec/worker.js dist/commands/js-exec/worker.js && cp src/commands/js-exec/worker.js dist/bin/chunks/js-exec-worker.js && cp src/commands/js-exec/worker.js dist/bundle/chunks/js-exec-worker.js",
+    "build:worker": "esbuild src/commands/python3/worker.ts --bundle --platform=node --format=esm --outfile=src/commands/python3/worker.js --external:../../../vendor/cpython-emscripten/* && cp src/commands/python3/worker.js dist/commands/python3/worker.js && mkdir -p dist/bin/chunks && cp src/commands/python3/worker.js dist/bin/chunks/worker.js && mkdir -p dist/bundle/chunks && cp src/commands/python3/worker.js dist/bundle/chunks/worker.js && esbuild src/commands/js-exec/worker.ts --bundle --platform=node --format=esm --outfile=src/commands/js-exec/js-exec-worker.js --external:quickjs-emscripten && cp src/commands/js-exec/js-exec-worker.js dist/commands/js-exec/js-exec-worker.js && cp src/commands/js-exec/js-exec-worker.js dist/bin/chunks/js-exec-worker.js && cp src/commands/js-exec/js-exec-worker.js dist/bundle/chunks/js-exec-worker.js",
     "build:lib": "esbuild dist/index.js --bundle --splitting --platform=node --format=esm --minify --outdir=dist/bundle --chunk-names=chunks/[name]-[hash] --external:diff --external:minimatch --external:sprintf-js --external:turndown --external:sql.js --external:quickjs-emscripten --external:@mongodb-js/zstd --external:node-liblzma --external:compressjs",
     "build:lib:cjs": "esbuild dist/index.js --bundle --platform=node --format=cjs --minify --outfile=dist/bundle/index.cjs --external:diff --external:minimatch --external:sprintf-js --external:turndown --external:sql.js --external:quickjs-emscripten --external:@mongodb-js/zstd --external:node-liblzma --external:compressjs",
     "build:browser": "esbuild dist/browser.js --bundle --platform=browser --format=esm --minify --outfile=dist/bundle/browser.js --external:diff --external:minimatch --external:sprintf-js --external:turndown --external:node:zlib --external:@mongodb-js/zstd --external:node-liblzma --external:compressjs --define:__BROWSER__=true --alias:node:dns=./src/shims/browser-unsupported.js",
diff --git a/src/commands/js-exec/js-exec.ts b/src/commands/js-exec/js-exec.ts
index 66dbd974..0acbdc77 100644
--- a/src/commands/js-exec/js-exec.ts
+++ b/src/commands/js-exec/js-exec.ts
@@ -223,7 +223,7 @@ type QueuedExecution = {
 const executionQueue: QueuedExecution[] = [];
 let currentExecution: QueuedExecution | null = null;
 
-const workerPath = fileURLToPath(new URL("./worker.js", import.meta.url));
+const workerPath = fileURLToPath(new URL("./js-exec-worker.js", import.meta.url));
 
 function processNextExecution(): void {
   // Skip canceled entries (timed out before execution started)
diff --git a/src/commands/js-exec/worker.ts b/src/commands/js-exec/worker.ts
index 6749e868..fb10aec0 100644
--- a/src/commands/js-exec/worker.ts
+++ b/src/commands/js-exec/worker.ts
@@ -9,8 +9,21 @@
  * Run: npx esbuild src/commands/js-exec/worker.ts --bundle --platform=node --format=esm --outfile=src/commands/js-exec/worker.js --external:quickjs-emscripten
  */
 
-import { stripTypeScriptTypes } from "node:module";
 import { parentPort } from "node:worker_threads";
+
+// Dynamic require with fallback: stripTypeScriptTypes is a Node.js 23.2+ API
+// that is not available in all runtimes (e.g., Bun). When unavailable, TypeScript
+// type stripping is disabled but plain JavaScript execution works normally.
+// Uses require() instead of await import() because Bun Worker threads load .js
+// files in a context where top-level await is not supported.
+let stripTypeScriptTypes: (code: string) => string;
+try {
+  // eslint-disable-next-line @typescript-eslint/no-require-imports
+  const nodeModule = require("node:module");
+  stripTypeScriptTypes = nodeModule.stripTypeScriptTypes ?? ((code: string) => code);
+} catch {
+  stripTypeScriptTypes = (code: string) => code;
+}
 import {
   getQuickJS,
   type QuickJSContext,