Claude Is Not Your Architect. Stop Letting It Pretend.

Somewhere between ‘ask Claude for a quick opinion’ and ‘Claude is writing our Jira tickets,’ we lost the plot. AI agents are brilliant implementers. They’re also confidently wrong about every decision that matters. And when it all falls over, they won’t be the ones carrying the bag.

The Vertical Codebase

Let’s take a look at why the common, horizontal code structure is not ideal, where it breaks down, and what we can do about it.

How many products does Microsoft have named ‘Copilot’? I mapped every one

Update: Since this was published, the lovely internet community has let me know we were missing two Copilots: Gaming Copilot and Microsoft Dragon Copilot (🤦‍♀️). This brings the total to 80. The chart has been updated and I’ll continue to update it as Microsoft continues to Copilot.

Understanding Traceroute

I never understood how traceroute discovers each hop. Turns out it’s a clever TTL trick, and about 80 lines of Rust.

Writing design docs – Ceejbot’s notes

How to figure out what to do and tell your colleagues at the same time

Impeccable: Design skills for AI harnesses

1 skill, 18 commands, and curated anti-patterns for impeccable frontend design. Works with Cursor, Claude Code, Gemini CLI, and Codex CLI.

Under the hood of MDN’s new frontend

You may have spotted that MDN has a new frontend. There’s plenty happening under the surface, so let’s unpack the technologies we chose, the architectural decisions we made, and why we did a rebuild at all.