fix: bundler compatibility for Cloudflare Workers (esbuild/wrangler)

package.json

@@ -23,6 +23,11 @@
       "import": "./dist/index.js",
       "default": "./dist/index.js"
     },
+    "./workerd": {
+      "types": "./dist/workerd.d.ts",
+      "import": "./dist/workerd.js",
+      "default": "./dist/workerd.js"
+    },
     "./dist/sip.wasm": "./dist/sip.wasm"
   },
   "files": [

src/decoders/simple.ts

@@ -74,9 +74,12 @@ async function initCodecForNode(
   initFn: (module: WebAssembly.Module) => Promise<any>,
   wasmPath: string
 ): Promise<void> {
-  // Dynamic import for Node.js modules
-  const { readFile } = await import('fs/promises');
-  const { createRequire } = await import('module');
+  // Dynamic module names prevent esbuild/wrangler from resolving these
+  // at bundle time. Only Node.js reaches this function at runtime.
+  const fsModule = 'fs/promises';
+  const moduleModule = 'module';
+  const { readFile } = await import(/* @vite-ignore */ fsModule);
+  const { createRequire } = await import(/* @vite-ignore */ moduleModule);
   const require = createRequire(import.meta.url);
 
   // Resolve the WASM file path from the package

src/wasm/loader.ts

@@ -150,7 +150,10 @@ async function doLoadWasm(): Promise<SipWasmModule> {
       process.versions.node != null;
 
     if (isNode) {
-      const { readFile } = await import('fs/promises');
+      // Dynamic module name prevents esbuild/wrangler from resolving this
+      // at bundle time. Only Node.js reaches this branch at runtime.
+      const fsModule = 'fs/promises';
+      const { readFile } = await import(/* @vite-ignore */ fsModule);
       const wasmBinary = await readFile(new URL('./sip.wasm', import.meta.url));
       const module = await createSipModule({ wasmBinary });
       return module as SipWasmModule;