https://kukie.tech/tags/callback/Recent content in Callback on HistoryHugoko-krMon, 19 Oct 2026 15:00:00 +0900https://kukie.tech/posts/kukie-infra-08/Mon, 19 Oct 2026 15:00:00 +0900https://kukie.tech/posts/kukie-infra-08/Removing the step where customers type their AWS account number — a CloudFormation custom resource that mails the role ARN to an SNS topic, an SQS buffer, a server that treats the notice as a hint and proves it by assuming the role, and the replies, retries and open-mailbox risks that come with it.