diff --git a/ccw/tests/verify-single-execution.ts b/ccw/tests/verify-single-execution.ts
new file mode 100644
index 00000000..0fab6011
--- /dev/null
+++ b/ccw/tests/verify-single-execution.ts
@@ -0,0 +1,68 @@
+/**
+ * Quick verification script for a specific execution ID
+ */
+
+import { getHistoryStore } from '../src/tools/cli-history-store.js';
+
+const executionId = process.argv[2];
+if (!executionId) {
+  console.error('Usage: tsx verify-single-execution.ts <execution-id>');
+  process.exit(1);
+}
+
+const projectPath = 'D:\\Claude_dms3';
+const store = getHistoryStore(projectPath);
+const conversation = store.getConversationWithNativeInfo(executionId);
+
+if (!conversation) {
+  console.log(`❌ Execution not found: ${executionId}`);
+  process.exit(1);
+}
+
+console.log(`\n✅ Execution found: ${executionId}`);
+console.log(`   Tool: ${conversation.tool}`);
+console.log(`   Mode: ${conversation.mode}`);
+console.log(`   Turns: ${conversation.turns.length}\n`);
+
+if (conversation.turns.length > 0) {
+  const turn = conversation.turns[0];
+  const stdout = turn.output.stdout || '';
+  const parsedOutput = turn.output.parsed_output || '';
+  
+  console.log('📊 Output Analysis:');
+  console.log(`   stdout length: ${stdout.length}`);
+  console.log(`   parsed_output length: ${parsedOutput.length}\n`);
+  
+  // Check if stdout is JSON lines
+  const stdoutFirstLine = stdout.split('\n')[0]?.trim();
+  let stdoutIsJson = false;
+  if (stdoutFirstLine) {
+    try {
+      JSON.parse(stdoutFirstLine);
+      stdoutIsJson = true;
+    } catch {}
+  }
+  
+  // Check if parsed_output is JSON lines
+  const parsedFirstLine = parsedOutput.split('\n')[0]?.trim();
+  let parsedIsJson = false;
+  if (parsedFirstLine) {
+    try {
+      JSON.parse(parsedFirstLine);
+      parsedIsJson = true;
+    } catch {}
+  }
+  
+  console.log('📝 Content Format:');
+  console.log(`   stdout: ${stdoutIsJson ? '⚠️  JSON lines' : '✅ Plain text'}`);
+  console.log(`   parsed_output: ${parsedIsJson ? '❌ JSON lines (BUG!)' : '✅ Plain text (CORRECT)'}\n`);
+  
+  console.log('📄 First 150 chars of parsed_output:');
+  console.log(`   "${parsedOutput.substring(0, 150)}${parsedOutput.length > 150 ? '...' : ''}"\n`);
+  
+  if (parsedIsJson) {
+    console.log('❌ ISSUE: parsed_output still contains JSON lines!');
+  } else {
+    console.log('✅ SUCCESS: parsed_output contains plain text');
+  }
+}