diff --git a/packages/cli/src/nonInteractive/io/JsonOutputAdapter.ts b/packages/cli/src/nonInteractive/io/JsonOutputAdapter.ts
index 68633675b..5d36ac7f0 100644
--- a/packages/cli/src/nonInteractive/io/JsonOutputAdapter.ts
+++ b/packages/cli/src/nonInteractive/io/JsonOutputAdapter.ts
@@ -67,9 +67,9 @@ export class JsonOutputAdapter
 
     if (this.config.getOutputFormat() === 'text') {
       if (resultMessage.is_error) {
-        process.stderr.write(`${resultMessage.error?.message || ''}`);
+        process.stderr.write(`${resultMessage.error?.message || ''}\n`);
       } else {
-        process.stdout.write(`${resultMessage.result}`);
+        process.stdout.write(`${resultMessage.result}\n`);
       }
     } else {
       // Emit the entire messages array as JSON (includes all main agent + subagent messages)