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hreflang is one of those things that looks simple in the documentation and causes real problems in production. We manage multiregional websites across the US, Polish, and Ukrainian markets. hreflang implementation issues are the most common reason why international sites lose rankings after migrat... read more

It's been a while since I've written anything publicly. I used to be fairly active documenting what I was building as a developer, and somewhere along the way - between shipping products and then pivoting toward cybersecurity - I went quiet. This is me picking that habit back up, starting with the ... read more

If you use Claude, Cursor, or any MCP-compatible AI assistant, you've probably noticed how useful it is when your AI can actually read your notes. I wanted that for OneNote — so I grabbed an existing MCP server, hit a cryptic 401 error, and ended up rewriting the whole thing in TypeScript. Here's ... read more

A workflow can complete every visible node and still produce the wrong business outcome. One reason is structural: a multi-step system inherits upstream misses. If every step is only usually correct, the end-to-end success rate is not the average of those rates. Under a simple independent-step ass... read more

I am building Tansa, a large Bitcoin analysis application using Rails, PostgreSQL, Sidekiq, and AI coding agents. After months of development, the Git repository had accumulated many commits, branches, recovery points, and AI-generated changes. We decided to clean it up and make the history easier... read more

You passed a single image to your model and got ValueError: expected 4D input (got 3D input). Someone on Stack Overflow said "just add .unsqueeze(0)" — and it worked. But nobody explained what it did, or how you'd know to reach for it next time. The short answer unsqueeze(dim) inserts a... read more

The single account that becomes a liability Every cloud journey starts in one account. Dev, staging, and prod all share it. Everyone has broad access because it's easier. The bill is one big undifferentiated number. It works, right up until it doesn't. A test script in "dev" deletes a pr... read more

Generating skills automatically is the easy part. Deciding when to throw them away is where everything falls apart. In my last post I covered auto-detecting Claude Code model retirements and switching aliases. This time I use the same launchd machinery to build lifecycle management that keeps a blo... read more

There is a particular kind of silence that settles over a room when somebody who works inside a frontier artificial intelligence laboratory is asked, off the record, how worried they actually are. It is not the silence of someone searching for an answer. It is the silence of someone deciding how mu... read more

Building Production-Grade LLM Evaluation Pipelines: From Vibes to Metrics How we replaced "looks good to me" with automated evaluation catching 92% of hallucinations before deployment The Problem: Why "Vibe Checks" Fail in Production Three months ago, our team shipped a RA... read more