System Architecture

Build caching is becoming an everyone problem. Here is how we think about productizing it at Tuist for indie developers and small teams, not just enterprises.

Working Backwards PR/FAQ Instructions & Template Working Backwards PR/FAQ Instructions & Template Start with the customer and work backwards—harder than it sounds but a clear path to innovating and delighting customers—a useful working backwards tool: writing the press release and FAQ before you build the product. Introduction Most of Amazon’s major products and initiatives since […]

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An interactive exploration of how GPS works — from the speed of light and trilateration to the cheap clock problem and Einstein's relativity corrections.

A deeper dive into why shell scripts cannot replace a proper CI control plane, drawn from years of building and operating CI systems at scale.

Durable queues, streams, pub/sub, and time-trigger scheduling on SQLite. One file, zero servers.

Learn how Linux containers are built from the ground up. Starting with the mount namespace and a root filesystem, see why PID, cgroup, UTS, and network namespaces naturally follow - and how this foundation makes concepts like bind mounts, volumes, and persistence in Docker or Kubernetes much easier to grasp.

A short HOW TO guide for agent memory systems. Especially the difference between blocks, files and skills.

FreeBSD loader (Forth, ZFS-aware Boot Environments), LILO (block lists, 1992-2015), GRUB 2 (filesystem drivers for everything). Three loaders, three theories of the operating system.

Jason Rodriguez is an interesting mix of marketer, designer, developer, and operations pro based in Michigan. Working at GitHub.

Posted on Saturday 18 Apr 2026. 1,331 words, 11 links. By Matt Webb.

Over the past decade, Clos-based leaf-spine architectures have become the default design for data center networking. They deliver predictable latency, horizontal scalability, and clean integration …

Phil Gervasi wrote an interesting article describing Rail-Optimized Networking for AI Training Workloads. Go read it first; I’ll wait. Does it sound interesting? Were you able to see behind the curtain and figure out what it’s really about?

Express 65 packages. Next.js 644. XZ 2.5 years of social engineering, caught by 500 ms of SSH latency. The audit duty has been outsourced so many times that nobody is holding it.

AI made code free. Coordination is the bottleneck now. The distributed-systems toolkit — partition, shard, shared-nothing — turns out to describe the next decade of org design.

GUIs are dead—at least for most user experiences. This post describes a BYU capstone project where five seniors built a conversational interface for Manifold using MCP and picos. The result shows how natural language can replace a GUI entirely, letting users create, tag, and manage digital things through dialogue instead of learning a standard graphical user interface.

The subtle inventiveness that reduced cold start setup from seconds to 200μs.

Adam Silver – interaction designer – London, UK

This specification has narrow goal is to specify, from an application perspective, the interface between a FastCGI application and a Web server that supports FastCGI.

For FastCGI's 30th birthday, let's look at how it avoids the security problems inherent in HTTP reverse proxying

Stop blaming CORS. Learn how Same-Origin Policy and CORS actually work together, understand simple vs non-simple requests, and debug CORS issues step by step.

codeToC4 by Uxxu reads your Git repo and generates up-to-date C4 architecture diagrams automatically. See architecture by commit, branch, and diff.

How the smartphone transformed digital identity—through biometrics, surveillance capitalism, FIDO's password killer, and the birth of virtual identity

Personal home page of Tony

Most people think an email address is just a username and a domain. It is a lot more than that. This covers structure, rule, edge case, and security trap worth knowing about.

iSCSI was designed for the SAN inside a rack, not the open internet. Here's the pile of small decisions that makes scsipub work anyway — Ranch 2.x listeners, a BEAM process per session, COW overlays, Caddy-terminated TLS, multi-LUN + SCSI-3 Persistent Reservations for cluster software, and a handful of open-iscsi quirks that cost us a day each.