try esm action

.husky/pre-commit

@@ -1,6 +1,3 @@
-#!/usr/bin/env sh
-. "$(dirname -- "$0")/_/husky.sh"
-
 # Ensure lockfile is up to date
 echo "🔒 Updating lockfile..."
 pnpm install --lockfile-only
@@ -10,4 +7,4 @@ echo "🔨 Building action..."
 pnpm build
 
 # Add the built files and lockfile to the commit
-git add entry.cjs pnpm-lock.yaml
+git add entry.js pnpm-lock.yaml

action.yml

@@ -13,7 +13,7 @@ inputs:
 
 runs:
   using: "node20"
-  main: "entry.cjs"
+  main: "entry.js"
 
 branding:
   icon: "code"

entry.ts

@@ -37,11 +37,4 @@ async function run(): Promise<void> {
   }
 }
 
-// Only run main action if INPUTS_JSON is set (running as GitHub Action)
-// When SDK spawns MCP server, it calls createMcpServer() directly
-if (process.env.INPUTS_JSON) {
-  // Wrap in IIFE to avoid top-level await in CJS
-  (async () => {
-    await run();
-  })();
-}
+await run();

esbuild.config.js

@@ -5,13 +5,16 @@ import { build } from "esbuild";
 await build({
   entryPoints: ["./entry.ts"],
   bundle: true,
-  outfile: "./entry.cjs",
-  format: "cjs",
+  outfile: "./entry.js",
+  format: "esm",
   platform: "node",
   target: "node20",
   minify: true,
   sourcemap: false,
-  // Mark optional peer dependencies as external to avoid bundling errors
+  // Mark all node_modules as external - Node.js will handle ESM/CJS interop natively
+  // This avoids esbuild's require() polyfill which doesn't work in ESM
+  packages: "external",
+  // Mark optional peer dependencies as external
   external: [
     "@valibot/to-json-schema",
     "effect",

mcp/config.ts

@@ -15,15 +15,19 @@ export function createMcpConfigs(githubInstallationToken: string): McpConfigs {
   const repoContext = parseRepoContext();
   const githubRepository = `${repoContext.owner}/${repoContext.name}`;
 
-  // Get absolute path to entry.cjs - use GITHUB_ACTION_PATH if available, otherwise current directory
+  // Get absolute path to entry.js - use GITHUB_ACTION_PATH if available, otherwise current directory
   const entryPath = process.env.GITHUB_ACTION_PATH
-    ? `${process.env.GITHUB_ACTION_PATH}/entry.cjs`
-    : `${process.cwd()}/entry.cjs`;
+    ? `${process.env.GITHUB_ACTION_PATH}/entry.js`
+    : `${process.cwd()}/entry.js`;
 
   return {
     [ghPullfrogMcpName]: {
       command: "node",
-      args: ["-e", `require('${entryPath.replace(/'/g, "\\'")}').createMcpServer()`],
+      args: [
+        "--input-type=module",
+        "-e",
+        `import('${entryPath.replace(/'/g, "\\'")}').then(m => m.createMcpServer())`,
+      ],
       env: {
         GITHUB_INSTALLATION_TOKEN: githubInstallationToken,
         GITHUB_REPOSITORY: githubRepository,

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@pullfrog/action",
-  "version": "0.0.75",
+  "version": "0.0.76",
   "type": "module",
   "files": [
     "index.js",

utils/setup.ts

@@ -50,8 +50,16 @@ export function setupGitConfig(): void {
 
 /**
  * Setup git authentication using GitHub token
+ * Only runs in GitHub Actions environment to avoid breaking local git remotes
  */
 export function setupGitAuth(githubToken: string, repoContext: RepoContext): void {
+  // Only set up git auth in GitHub Actions environment
+  // In local testing, this would overwrite the real git remote with fake credentials
+  if (!process.env.GITHUB_ACTIONS) {
+    log.info("⚠️  Skipping git authentication setup (not in GitHub Actions)");
+    return;
+  }
+
   log.info("🔐 Setting up git authentication...");
 
   // Remove existing git auth headers that actions/checkout might have set