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DevOps and Infrastructure with AI

Krisztian Eyssen, Krisztian Eyssen

DevOps and Infrastructure with AI

The same model that solves 86% of Python tasks manages barely a **fifth** of infrastructure-as-code tasks. And there is a measurement that took the result from 14% to **93%** — of the 79-point gain, **48.9 points** came from retrieved documentation, prompt structure and the scanner's feedback, **21.5 points** from switching models, and **8.6 points** from letting the model **see the rule**.

Advanced Developer How-To Coding & Development

Sep 13, 2026

Refactoring Safely with AI

Krisztian Eyssen, Krisztian Eyssen

Refactoring Safely with AI

Roughly **one AI refactoring in twenty changes the behaviour while the tests stay green.** That is not an estimate: it falls out of multiplying two published measurements. And that number is the reason the order of your checks matters more than the prompt here.

Advanced Developer How-To Coding & Development

Sep 13, 2026

Testing and Monitoring Your Agents

Krisztian Eyssen, Krisztian Eyssen

Testing and Monitoring Your Agents

In a survey of 1,300 practitioners, **39.8%** of respondents ran offline evaluation and **32.5%** ran it online — while everyone named **quality** as the main obstacle to getting into production, more than twice as often as cost or security. Everybody logs. Measuring whether the agent is doing a good job is something most people cannot do. This article is about how you can.

Advanced Developer How-To Agents & Automation

Sep 13, 2026

Multi-Agent Systems: When More Agents Help

Krisztian Eyssen, Krisztian Eyssen

Multi-Agent Systems: When More Agents Help

Five real multi-agent systems were measured in the same study. The best one scored **84.8%**, the worst **13.3%** — and in the middle of the field sit two systems that got **three quarters of the tasks wrong**. The difference did not come from the model. It came from the pattern. This article is about **which four patterns pay back the cost of coordination, and which two do not.**

Advanced Developer Explainer Agents & Automation

Sep 13, 2026

Scheduled and Background Agents

Krisztian Eyssen, Krisztian Eyssen

Scheduled and Background Agents

One vendor's documentation describes its own interface like this: **"a green status means the session started and exited without an infrastructure error. It does not mean the task succeeded."** That one sentence sums up the entire problem with background agents. And according to one measurement, **more than a third** of failures are exactly this: the agent **does not know when to stop**.

Advanced Business owner How-To Agents & Automation

Sep 13, 2026

Agent Memory: What to Store and What to Forget

Krisztian Eyssen, Krisztian Eyssen

Agent Memory: What to Store and What to Forget

Memory is the weakest agent capability there is. On the best independent measurement, **the average of 109 models fails to reach 30% on any memory strategy** — the very same models score 86–91% on simple tool calls. That measurement also shows that **there is no universally good memory architecture**. And there is a second reason for caution: memory is an **attack surface** — in one study an attacker planted a persistent false memory with a **98.2% success rate**, using nothing but questions.

Advanced Developer Explainer Agents & Automation

Sep 13, 2026

Subagents and Parallel Work

Krisztian Eyssen, Krisztian Eyssen

Subagents and Parallel Work

The most quoted number says a multi-agent setup is **90.2% better** than a single-agent one. The same source also writes that it uses **fifteen times as many tokens**, and that **80% of the performance difference is explained by token consumption alone**. And a 2026 paper showed it formally: **at an equal token budget, the single-agent system wins.** The value of splitting a task is not parallelism — it is **clean context**.

Advanced Developer How-To Agents & Automation

Sep 13, 2026

Permissions: The Least-Privilege Agent

Krisztian Eyssen, Krisztian Eyssen

Permissions: The Least-Privilege Agent

Three things are needed for a data leak: **private data**, **untrusted content** and **an outbound channel**. Any two of them on their own are safe — all three together are not. And this is not theory: according to a study of 7,973 live servers, **40.55% of them expose their tools with no authentication**.

Advanced Business owner How-To Agents & Automation

Sep 13, 2026

Tool Use and Function Calling, Explained

Krisztian Eyssen, Krisztian Eyssen

Tool Use and Function Calling, Explained

The most common misconception about this topic can be refuted in one sentence taken from the vendor documentation: **the model does not call the tool.** It fills in a form and says which one it would like — the call is made by your code. Everything else follows from that: the cost, the error handling, and the reason a single round gets three times more expensive.

Advanced Developer Explainer Agents & Automation

Sep 13, 2026

Running Image Models on Your Own Machine

Krisztian Eyssen, Krisztian Eyssen

Running Image Models on Your Own Machine

Unlimited generation, no subscription, full control — and a very specific hardware bill. Here is where the line runs, how much VRAM each tier needs, and how many images it would take before this pays for itself.

Advanced Developer How-To Images & Design

Sep 12, 2026

Model Routers: One Key, Many Models

Krisztian Eyssen, Krisztian Eyssen

Model Routers: One Key, Many Models

One integration, five hundred models. This is the only sane way to try ten of them — and it has three hidden prices worth knowing in advance. On top of that, four different things get called a model router, and which one you mean matters.

Advanced Developer Tool review OpenRouter Models & Market

Sep 11, 2026

Context Engineering: What Replaced Prompt Engineering

Krisztian Eyssen, Krisztian Eyssen

Context Engineering: What Replaced Prompt Engineering

Half of that title is true. Prompting did not die — it just turned out that phrasing the question is the smaller half of the work that makes an AI system function.

Advanced Everyone Explainer Prompting

Sep 11, 2026

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