diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..c0e3d9c
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+# Mark generated files as linguist-generated to exclude from language statistics
+entry.js linguist-generated
+
diff --git a/README.md b/README.md
index f31a773..d215ea3 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ GitHub Action for running Claude Code and other agents via Pullfrog.
 pnpm install
 ```
 
-## Testing with play.ts
+## Testing with `play.ts`
 
 ```bash
 pnpm play                        # Uses fixtures/play.txt
diff --git a/agents/jules.ts b/agents/jules.ts
index 9cf68dd..a61379f 100644
--- a/agents/jules.ts
+++ b/agents/jules.ts
@@ -12,6 +12,7 @@ export const jules = agent({
       packageName: "@google/jules",
       version: "latest",
       executablePath: "run.cjs",
+      installDependencies: true,
     });
   },
   run: async ({
diff --git a/agents/shared.ts b/agents/shared.ts
index 5945d56..e28050e 100644
--- a/agents/shared.ts
+++ b/agents/shared.ts
@@ -37,10 +37,12 @@ export async function installFromNpmTarball({
   packageName,
   version,
   executablePath,
+  installDependencies,
 }: {
   packageName: string;
   version: string;
   executablePath: string;
+  installDependencies?: boolean;
 }): Promise<string> {
   // Resolve version if it's a range or "latest"
   let resolvedVersion = version;
@@ -119,6 +121,22 @@ export async function installFromNpmTarball({
     throw new Error(`Executable not found in extracted package at ${cliPath}`);
   }
 
+  // Install dependencies if requested
+  if (installDependencies) {
+    log.info(`Installing dependencies for ${packageName}...`);
+    const installResult = spawnSync("npm", ["install", "--production"], {
+      cwd: extractedDir,
+      stdio: "pipe",
+      encoding: "utf-8",
+    });
+    if (installResult.status !== 0) {
+      throw new Error(
+        `Failed to install dependencies: ${installResult.stderr || installResult.stdout || "Unknown error"}`
+      );
+    }
+    log.info(`✓ Dependencies installed`);
+  }
+
   // Make the file executable
   chmodSync(cliPath, 0o755);