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Cdk

Articles and publications tagged Cdk across the Atmosphere.

111articles32publications
subaud
subaudAug 23, 2026
OAuth for MCP Servers with Cognito and Okta
When I added OAuth to the MixCraft MCP server, the identity provider was Clerk, and Clerk did the whole job: it was the OAuth authorization server the MCP client talked to, it signed in the user, and it issued the tokens the MCP server verified. The next remote MCP server I put behind a login had users who already sign in through Okta, so Okta had to be where the sign-in happened. Okta is the identity provider here, but most of the configuration is on the Cognito side: a Cognito user pool federa
MCPOAuth
subaud
subaudJul 31, 2026
Authoring an llms.txt for AI Agents
The first consumer of my runner-set library — a CDK construct that runs GitHub Actions jobs on Lambda MicroVMs — was another of my own repos, and the migration was done by an AI agent. The Claude session that moved its nine CI jobs onto the runners filed a field report, and reading it back, every failure it hit traced to something the documentation didn't say, not something it said wrong. The docs never said whether a job can run Docker. The agent probed, hit a sudo failure (no_new_privs is se
documentationAgents
subaud
subaudJul 6, 2026
A CDK Lambda Bundle-Size Gate for CI
A deploy in one of my CDK projects passed every gate I have — CI, cdk synth, code review — and merged. The CloudFormation stack deployment to AWS failed with: InvalidRequest: Unzipped size must be smaller than 262144000 bytes 262,144,000 bytes is 250 MiB, AWS's hard limit on the unzipped deployment package of a zip-packaged Lambda. A few transitive dependencies had crept in and pushed one function's bundle over the edge. It failed in an uncomfortable place. cdk synth builds the CloudForma
AWSCDK
Devtools FM
Devtools FMMay 10, 2026
Sam Goodwin - Alchemy
Sam Goodwin introduces Alchemy, a modern infrastructure-as-code tool built with Effect that challenges the tech debt of current solutions.
infrastructure as codeai
subaud
subaudMar 14, 2026
Printing Zebra Labels from a Browser
A friend runs a lab with custom software that handles sample tracking, inventory management, and reporting. It does nearly everything they need — except print labels. They have Zebra thermal printers on the network and a collection of ZPL templates, but the software has no integration with the printers, so printing labels was cumbersome and time consuming. I built a web app to close that gap — select a printer, paste or upload ZPL, hit print. The whole thing runs as a static React site on S3 a
ZebraBrowser Print
subaud
subaudMar 12, 2026
MixCraft - A hosted music assistant MCP
Several months ago, I was looking for some new music and decided to give Claude a crack at finding me some new music. i'm trying to make an album based playlist. It should consist of 3 (mostly) complete albums. Right now I have Hum - Downward is Heavenward and Weezer - Pinkerton. These two go together very well. Is there a third album we can include in this? This fairly innocuous prompt resulted in Claude suggested a completely unknown to me band that very quickly became one of my
MCPAWS
subaud
subaudMar 4, 2026
Teaching Claude to Teach AWS
A friend had been building a web app with Claude Code — Express server, vanilla HTML/CSS/JS, in-memory data storage. The app worked and kept growing. But it was running on her laptop with no deployment, no database, and no auth. She needed to get it to AWS and had limited experience with cloud infrastructure. I couldn't see her code, so I built a Claude Code plugin that could walk her through the deployment. The plugin analyzes an Express app, converts routes to Lambda functions, sets up S3 +
Claude CodeAWS
subaud
subaudFeb 22, 2026
Modernizing a CDK Project - WebSocket Server with Fargate
I recently revisited cdk-websocket-server, a demo I published in 2023 for running a WebSocket server on ECS Fargate behind CloudFront. The original worked, but it carried unnecessary complexity — EC2 instances backing a Fargate cluster, a custom Lambda to patch CloudFront headers, and a single-stage Docker build running as root. Here's what changed and why. Dropping the EC2 Auto Scaling Group The original created an EC2 Auto Scaling Group alongside the Fargate cluster: // Old approach con
AWSCDK
subaud
subaudDec 25, 2025
Securing AWS S3 with Cloudflare: The Worker Direct Fetch Pattern
When building a React SPA with Cloudflare as the CDN it is possible to use S3 for static asset storage. If you have all of your resources typically on AWS, but want some of the advantages of Cloudflare, you can build a system that is very similar to the traditional Cloudfront + S3 architecture. There are a few differences in deployments and setup, but it is generally the same. The typical approach with Cloudflare uses S3 static website hosting with IP restrictions, but this comes with significan
CloudflareAWS
subaud
subaudSep 22, 2025
Ghost on AWS: ActivityPub Federation
Ghost recently released ActivityPub support, enabling Ghost blogs to participate in the Fediverse alongside Mastodon, Threads, and other federated platforms. Through extensive testing and production deployment, we discovered that the official ActivityPub container has a bug that prevents self-hosted ActivityPub deployments from working. Combined with AWS-specific networking challenges, we had to modify the container source code to achieve working federation. Common Errors Through the proces
GhostCDK
subaud
subaudSep 15, 2025
Ghost on AWS: Email and Newsletter Automation
Ghost handles email differently than most CMS platforms. It ships with newsletter capabilities built-in but requires external SMTP for transactional emails and lacks automated digest features entirely. This post covers setting up both transactional email through Mailgun and building an automated weekly digest system using AWS Lambda and EventBridge. The weekly digest system we built sends every Monday at 9 AM, compiles posts from the past week into bookmark cards, and integrates with Ghost's n
CDKGhost
subaud
subaudSep 13, 2025
Ghost on AWS: S3 Storage and CloudFront CDN
Running Ghost in containers presents a storage challenge. Container filesystems are ephemeral - when a container restarts, any locally stored files disappear. This includes all uploaded images, making local storage unsuitable for production Ghost deployments on ECS. The solution uses S3 for persistent storage and CloudFront for global content delivery. Ghost uploads images to S3, which persist across container restarts and scale across multiple container instances. CloudFront serves these imag
CDKGhost
subaud
subaudSep 11, 2025
Ghost on AWS: Core Infrastructure with CDK
Ghost requires a MySQL database, persistent storage for content and images, and a way to handle traffic at scale. AWS provides these through RDS Aurora, EFS, S3, and ECS Fargate. This post walks through deploying the core infrastructure using AWS CDK, which allows us to define everything as TypeScript code rather than clicking through the AWS console. The infrastructure we're building costs approximately $175 per month. The largest costs are the database ($47/month) and NAT Gateway ($32/month)
CDKArchitecture
subaud
subaudJul 26, 2025
Deploying AWS Applications with Cloudflare Workers and Cloud Connector
A comprehensive guide on using Cloudflare as a security and CDN layer for AWS-hosted applications, with edge-level API key injection
AWSCDK
LocalStack Blog
LocalStack BlogJul 24, 2025
Why I Run My AWS Serverless Apps Locally First (and You Probably Should Too)
Tired of waiting on CloudFormation, racking up bills, and debugging invisible resources? Learn how to run a real serverless app (S3, Lambda, SQS, and DynamoDB) entirely on your laptop using LocalStack, with step-by-step commands and explanations.
Cloud DevelopmentServerless
LocalStack Blog
LocalStack BlogJul 24, 2025
Why I Run My AWS Serverless Apps Locally First (and You Probably Should Too)
Tired of waiting on CloudFormation, racking up bills, and debugging invisible resources? Learn how to run a real serverless app (S3, Lambda, SQS, and DynamoDB) entirely on your laptop using LocalStack, with step-by-step commands and explanations.
Cloud DevelopmentServerless
LocalStack Blog
LocalStack BlogJul 24, 2025
Why I Run My AWS Serverless Apps Locally First (and You Probably Should Too)
Tired of waiting on CloudFormation, racking up bills, and debugging invisible resources? Learn how to run a real serverless app (S3, Lambda, SQS, and DynamoDB) entirely on your laptop using LocalStack, with step-by-step commands and explanations.
Cloud DevelopmentServerless
LocalStack Blog
LocalStack BlogJul 24, 2025
Why I Run My AWS Serverless Apps Locally First (and You Probably Should Too)
Tired of waiting on CloudFormation, racking up bills, and debugging invisible resources? Learn how to run a real serverless app (S3, Lambda, SQS, and DynamoDB) entirely on your laptop using LocalStack, with step-by-step commands and explanations.
Cloud DevelopmentServerless
LocalStack Blog
LocalStack BlogJul 24, 2025
Why I Run My AWS Serverless Apps Locally First (and You Probably Should Too)
Tired of waiting on CloudFormation, racking up bills, and debugging invisible resources? Learn how to run a real serverless app (S3, Lambda, SQS, and DynamoDB) entirely on your laptop using LocalStack, with step-by-step commands and explanations.
Cloud DevelopmentServerless
LocalStack Blog
LocalStack BlogJul 24, 2025
Why I Run My AWS Serverless Apps Locally First (and You Probably Should Too)
Tired of waiting on CloudFormation, racking up bills, and debugging invisible resources? Learn how to run a real serverless app (S3, Lambda, SQS, and DynamoDB) entirely on your laptop using LocalStack, with step-by-step commands and explanations.
Cloud DevelopmentServerless
LocalStack Blog
LocalStack BlogJul 24, 2025
Why I Run My AWS Serverless Apps Locally First (and You Probably Should Too)
Tired of waiting on CloudFormation, racking up bills, and debugging invisible resources? Learn how to run a real serverless app (S3, Lambda, SQS, and DynamoDB) entirely on your laptop using LocalStack, with step-by-step commands and explanations.
Cloud DevelopmentServerless
LocalStack Blog
LocalStack BlogJul 24, 2025
Why I Run My AWS Serverless Apps Locally First (and You Probably Should Too)
Tired of waiting on CloudFormation, racking up bills, and debugging invisible resources? Learn how to run a real serverless app (S3, Lambda, SQS, and DynamoDB) entirely on your laptop using LocalStack, with step-by-step commands and explanations.
Cloud DevelopmentServerless
LocalStack Blog
LocalStack BlogJul 24, 2025
Why I Run My AWS Serverless Apps Locally First (and You Probably Should Too)
Tired of waiting on CloudFormation, racking up bills, and debugging invisible resources? Learn how to run a real serverless app (S3, Lambda, SQS, and DynamoDB) entirely on your laptop using LocalStack, with step-by-step commands and explanations.
Cloud DevelopmentServerless
LocalStack Blog
LocalStack BlogJul 24, 2025
Why I Run My AWS Serverless Apps Locally First (and You Probably Should Too)
Tired of waiting on CloudFormation, racking up bills, and debugging invisible resources? Learn how to run a real serverless app (S3, Lambda, SQS, and DynamoDB) entirely on your laptop using LocalStack, with step-by-step commands and explanations.
Cloud DevelopmentServerless