diff --git a/packages/web-ui/src/components/SandboxedIframe.ts b/packages/web-ui/src/components/SandboxedIframe.ts
index 623ede0a..8a020404 100644
--- a/packages/web-ui/src/components/SandboxedIframe.ts
+++ b/packages/web-ui/src/components/SandboxedIframe.ts
@@ -347,8 +347,7 @@ export class SandboxIframe extends LitElement {
 
 				await window.complete(null, returnValue);
 			} catch (error) {
-				console.error(error?.stack || error?.message || String(error));
-
+	
 				// Call completion callbacks before complete() (error path)
 				if (window.__completionCallbacks && window.__completionCallbacks.length > 0) {
 					try {
diff --git a/packages/web-ui/src/tools/javascript-repl.ts b/packages/web-ui/src/tools/javascript-repl.ts
index 16db59e3..00a14b32 100644
--- a/packages/web-ui/src/tools/javascript-repl.ts
+++ b/packages/web-ui/src/tools/javascript-repl.ts
@@ -63,6 +63,12 @@ export async function executeJavaScript(
 			}
 		}
 
+		// Add return value if present
+		if (result.returnValue !== undefined) {
+			if (output) output += "\n";
+			output += `=> ${typeof result.returnValue === "object" ? JSON.stringify(result.returnValue, null, 2) : result.returnValue}`;
+		}
+
 		// Add file notifications
 		if (result.files && result.files.length > 0) {
 			output += `\n[Files returned: ${result.files.length}]\n`;