We've finished our backend series — a Directus instance running on a VPS managed by Coolify, backed by PostgreSQL and Redis, with a products collection already built and secured with roles and permissions. Now it's time to build a frontend to actual...

The moment real traffic hits your LLM endpoint, every token turns into a line item on your cloud bill — and that line item doesn't stop growing once the prompt itself stops changing, as I found out the hard way chasing down why a coding agent's bill ...

A game can end cleanly and still make its next step confusing. A player sees a replay control and assumes it means “show that again.” A host may read the same word as “start another paid session.” Before polishing that button, write down which action...

Benchmarking the FSM: Pure Strings, Already Fast — and About to Get Faster There's a particular reaction you tend to get when you tell an experienced systems programmer that your architecture is string-backed: "Don't use strings." It's almost ref...

Motivation The time has come: the big test. I got some simple binaries running on my Rust KVM hypervisor at this point I am thinking about giving it a proper name. The next thing has to be Linux. For this series I will show how to actually boot Lin...

The time our AI kept a memory from an earlier chat we were very excited. It felt like magic. ✨ We had created a system that could carry facts from one interaction to the next. Than starting from scratch each time the AI could use facts from earlier...

The database architecture behind students, meetings, attendance, authentication, and controlling unnecessary Firestore reads. How I Structured My Firestore Data Model for an Anti-Proxy Attendance System When I began building my attendance system, ...

A green checkmark can lie to you Here’s a scene that keeps repeating in engineering teams that use AI to write code at scale: the number of changes goes up, the number of automated tests goes up with it, everything shows green, and everyone relaxes...

Part 6 of the Building the AI Memory Stack series At the end of the last article, I left one question unanswered. > Can you prove this record is exactly what was written? Write-Side Custodyhttps://sovereignplatform.dev/terms/write-side-custody.htm...

How 20+ scheduling algorithms, a privacy-first local architecture, and zero mandatory registration combine to make free AI-powered shift scheduling actually work. Workforce scheduling looks like a UI problem until you try to automate it correctly. ...

Why we stopped hard-coding affiliate links and built a publishing system instead Most affiliate websites start the same way. Every review contains a button. That button contains an affiliate link. Simple. Until you have fifty reviews. Then one hundre...

Hey everyone! I put together a quick guide on building and releasing Rust crates using Cargo. Highlights covered: Distinguishing between binary crates src/main.rs and library crates src/lib.rs. Manifest management in Cargo.toml. Pre-release check...

A browser voice-practice tool looks simple from the outside: show a line, turn on the microphone, record a take, and play it back. In practice, the most important design decision is not the recorder API. It is deciding when the performer should perfo...

Writing E2E Tests With One Doc Instead of New Tooling We had a growing monorepo with two frontend apps and zero end-to-end coverage. The blocker was never Playwright itself. It was that every new feature meant babysitting an AI agent through the te...

Two projects, thirteen serious bugs, and one pattern that kept showing up everywhere. Most engineers find out their code has problems when a user reports one. I found out earlier — by going back through two of my own projects and auditing them pr...

An MCP-connected agent passes staging and then fails in production. A user sends a query slightly outside the test distribution, the agent picks the wrong tool, passes malformed arguments, chains three unnecessary calls, and returns garbage. The reas...

About five years ago, I was building a spreadsheet-based web application with SpreadJS. It worked well for most scenarios, but over time I realized the biggest challenge wasn't rendering spreadsheets. It was helping people manage hundreds of Excel ...

If you've been following AI regulation at all, you've probably heard about the EU AI Act. You may also have heard that parts of it were delayed. That's true, but it's causing a lot of confusion. The recent Digital Omnibus changes pushed several hi...

Picking a model on just a single factor retail price, benchmark scores, industry hype rarely predicts the true cost or quality of agentic development. I had a project that required an agentic development lifecycle and some free cycles, so the team ra...