diff --git a/deploy/ami/open-swe-base.pkr.hcl b/deploy/ami/open-swe-base.pkr.hcl
index af2c1982..0c37d72a 100644
--- a/deploy/ami/open-swe-base.pkr.hcl
+++ b/deploy/ami/open-swe-base.pkr.hcl
@@ -73,7 +73,8 @@ source "amazon-ebs" "open-swe" {
   ssh_username  = "ubuntu"
 
   ami_name        = "${var.ami_name_prefix}-${local.timestamp}"
-  ami_description = "Open SWE base — Ubuntu 24.04 arm64 + uv/py3.12 + nginx + CW agent (templates only, no secrets)"
+  # ASCII only — AWS rejects non-ASCII in the AMI Description attribute.
+  ami_description = "Open SWE base - Ubuntu 24.04 arm64 + uv/py3.12 + nginx + CW agent (templates only, no secrets)"
 
   source_ami_filter {
     filters = {
diff --git a/infra/lib/constructs/ami-cache.ts b/infra/lib/constructs/ami-cache.ts
index 279f0f81..7687ac07 100644
--- a/infra/lib/constructs/ami-cache.ts
+++ b/infra/lib/constructs/ami-cache.ts
@@ -7,7 +7,7 @@ import { REGION } from "../config";
  * Pinned by EXACT id (not a name filter) so synth/deploy is fully offline and
  * deterministic.
  *
- * Built 2026-06-26 from open-swe-base-arm64-20260626-201929.
+ * Built 2026-06-26 from open-swe-base-arm64-20260626-203433.
  *
  * ── EBS / AMI replacement discipline (memory feedback_inline_ebs_volumes) ──
  *
@@ -27,7 +27,7 @@ import { REGION } from "../config";
  * snapshot the root volume AND wait `state=completed`, re-verify "no local-only
  * durable state", and review the `cdk diff` replacement at PR time.
  */
-export const BAKED_OPEN_SWE_AMI_ID = "ami-0545363bb147229ff";
+export const BAKED_OPEN_SWE_AMI_ID = "ami-00080084502093021";
 
 /** The baked open-swe base image, pinned by id (offline, deterministic). */
 export function bakedOpenSweArm64(): ec2.IMachineImage {