From 21ad13943c9f5d3a828fd5e5199ee683a079974d Mon Sep 17 00:00:00 2001
From: Adam Moussa <166072409+amoussa1229@users.noreply.github.com>
Date: Wed, 3 Jun 2026 16:02:39 -0400
Subject: [PATCH] Pin SocketMode image asset to LINUX_ARM64

The task runs ARM64, but the image asset had no explicit platform, so
the amd64 CD runner built an amd64 image (QEMU alone does not change
the default target). Revision :8 crash-looped with "exec format
error" (50 failed task starts); CloudFormation hung on service
stabilization until cancelled. Local arm64 builds masked this -
deploys from this Mac always produced the right image.

Same fix pattern as the org-wide QEMU+platform rule for arm64 Lambda
bundling.
---
 lib/constructs/socket-mode.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/constructs/socket-mode.ts b/lib/constructs/socket-mode.ts
index ba59c0f..585d911 100644
--- a/lib/constructs/socket-mode.ts
+++ b/lib/constructs/socket-mode.ts
@@ -3,6 +3,7 @@ import * as cdk from 'aws-cdk-lib';
 import * as ec2 from 'aws-cdk-lib/aws-ec2';
 import * as ecs from 'aws-cdk-lib/aws-ecs';
 import * as ecr from 'aws-cdk-lib/aws-ecr';
+import * as ecrAssets from 'aws-cdk-lib/aws-ecr-assets';
 import * as logs from 'aws-cdk-lib/aws-logs';
 import * as iam from 'aws-cdk-lib/aws-iam';
 import * as dynamodb from 'aws-cdk-lib/aws-dynamodb';
@@ -76,6 +77,10 @@ export class SocketModeConstruct extends Construct {
     taskDef.addContainer('listener', {
       image: ecs.ContainerImage.fromAsset(
         path.join(__dirname, '../../listener'),
+        // Explicit platform: the task is ARM64, and without this an amd64 CI
+        // runner builds an amd64 image even with QEMU enabled — tasks then
+        // crash-loop with "exec format error" (50 failed starts on 2026-06-03).
+        { platform: ecrAssets.Platform.LINUX_ARM64 },
       ),
       essential: true,
       environment: {
-- 
2.50.1