diff --git a/src/assets/__tests__/__snapshots__/assets.snapshot.test.ts.snap b/src/assets/__tests__/__snapshots__/assets.snapshot.test.ts.snap
index 1f1df80b..a35e4c26 100644
--- a/src/assets/__tests__/__snapshots__/assets.snapshot.test.ts.snap
+++ b/src/assets/__tests__/__snapshots__/assets.snapshot.test.ts.snap
@@ -80,7 +80,10 @@ async function main() {
   app.synth();
 }
 
-main();
+main().catch((error: unknown) => {
+  console.error('AgentCore CDK synthesis failed:', error instanceof Error ? error.message : error);
+  process.exitCode = 1;
+});
 "
 `;
 
diff --git a/src/assets/cdk/bin/cdk.ts b/src/assets/cdk/bin/cdk.ts
index 92caa1f1..42f12218 100644
--- a/src/assets/cdk/bin/cdk.ts
+++ b/src/assets/cdk/bin/cdk.ts
@@ -47,4 +47,7 @@ async function main() {
   app.synth();
 }
 
-main();
+main().catch((error: unknown) => {
+  console.error('AgentCore CDK synthesis failed:', error instanceof Error ? error.message : error);
+  process.exitCode = 1;
+});