Simplifying Containers with Cloudflare Sandboxes

- How I replaced a long-lived Cloudflare Container with a one-shot Cloudflare Sandbox, deleted most of the control-plane code, and let an agent do the heavy lifting in less than an hour of my own time....

Offloading FFmpeg with Cloudflare

- How I moved Call Kent podcast episode processing off my primary Fly.io app server and onto Cloudflare Queues and Containers: what broke, what I missed, and whether it was worth the complexity....

what is a container image?

- this is part 1 of a two-part series on how container images and filesystems work: what is a container image? (this post) how does my container get a root filesystem? intro my first mental model of a container was: a container is like when your friend wants to send you some files...

how does my container get a root fs?

- this is part 2 of a two-part series on how container images and filesystems work: what is a container image? how does my container get a root filesystem? intro in part 1, we built a two-layer OCI image by hand, imported it into containerd, and ran it. we saw that a container...

ChatGPT Containers can now run bash, pip/npm install packages, and download files

- One of my favourite features of ChatGPT is its ability to write and execute code in a container. This feature launched as ChatGPT Code Interpreter nearly three years ago, was …

Fly's new Sprites.dev addresses both developer sandboxes and API sandboxes at the same time

Meanwhile in DevOps #51: Selling to both sides

- Ellis is set up at a big AI conference, ready to draw in the punters to his new company, Pik-Tec. He’s standing in front of a large banner that reads, “AICon: Not just AI, but also a con.” “You should totally buy our AI image generator,” Ellis calls out to an attendee. “No...

Setting up WireGuard on Synology DSM 7 using Docker and Gluetun

- A guide to connect a Synology NAS to a WireGuard VPN server....

Self-Hosting a Photo Server the Whole Family Can Use

- Until recently, my family's 90,000+ photos have been hidden away in the depths of my gaming PC's hard drives. Many of the more recent photos were also scattered across our individual iCloud accounts, making them hard to find and access. A failing backup drive on my PC (thanks...

The Pulse: Cloudflare takes down half the internet – but shares a great postmortem

- A database permissions change ended up knocking Cloudflare’s proxy offline. Pinpointing the root cause was tricky – but Cloudflare shared a detailed postmortem. Also: announcing The Pragmatic Summit...

Building blobd: single-machine object store with sub-millisecond reads and 15 GB/s uploads

- Deep dive into blobd, an object store designed for constant low latency reads using async Rust, io_uring and atomic writes...

Build your first AI Agent with Gemini, n8n and Google Cloud Run

- Learn how to deploy n8n on Google Cloud Run with PostgreSQL and create an AI Agent using Google Gemini 2.5....

Running Pull Requests in Github Codespaces

- Earlier this week, I was having a lot of trouble understanding how to get Dev Containers working. Dev Containers are the required way to enable Github Codespaces, which was my actual goal. I finally got to something that works, so I want to document what I learned. Dev...

Claude Code for web - a new asynchronous coding agent from Anthropic

Getting DeepSeek-OCR working on an NVIDIA Spark via brute force using Claude Code

Virtual context management with MemGPT and Letta

- The paper “MemGPT: Towards LLMs as Operating Systems” (2023) by Charles Packer, Sarah Wooders, Kevin Lin, Vivian Fang, Shishir G. Patil, and Joseph E. Gonzalez introduces a memory management system for LLMs. To enable using context beyond limited context windows, we propose...

Claude can write complete Datasette plugins now

What the Meteorologist: Announcing wxpull

- I had not encountered the grib2 format before, but it is popular for this kind of data. A brief web search reveals the wgrib2 command-line tool might be helpful. Let’s see, is that in nixpkgs?… Nope. But we can add it. It’s a straightforward CMake build process with no required...

How to Use an AWS S3 Bucket as a Pulumi State Backend

- Self-host Pulumi state with an S3 Bucket, an IAM User, and the Pulumi CLI....

Seven Years of Firecracker

- Seven Years of Firecracker Time flies like an arrow. Fruit flies like a banana. Back at re:Invent 2018, we shared Firecracker with the world. Firecracker is open source software that makes it easy to create and manage small virtual machines. At the time, we talked about...

Installing Playwright in GitHub Actions

- I’ve been using Playwright to automate browser tests for ages. I also like to keep my dependencies up to date, so I dutifully ensure Playwright has a working browser installed before I run the tests. Today, I hit a wall where the latest updates just wouldn’t complete the...

Using Claude Code from Anywhere

- I've been using multiple instances of Claude Code and Codex CLI almost every day. But I've gotten frustrated enough to build something that solidifies my workf...

We Rewrote the Ghostty GTK Application

Code Sandbox MCP: A Simple Code Interpreter for Your AI Agents

- Code Sandbox MCP is a simple, self-hosted code interpreter for your AI agents. It allows you to execute code snippets in containerized environments....