Coding & Development tag

20 Articles

Coding & Development ×

Krisztian Eyssen

coding agent

An agent that writes, runs and fixes code in your project on its own, instead of only suggesting it.

Beginner Everyone Glossary Coding & Development

Sep 13, 2026 Glossary

Krisztian Eyssen

vibe coding

The way of working where you tell the AI what you want and never read the code itself.

Beginner Everyone Glossary Coding & Development

Sep 13, 2026 Glossary

Krisztian Eyssen

Project Instructions an Agent Actually Follows

In a paired experiment, a project instruction file meant **20% fewer tokens and 20% less time** for the same task. What nobody has demonstrated is that it makes the code better. And there is a ceiling: **at roughly eighty simultaneous rules**, "follows every rule" essentially stops happening.

Advanced Developer How-To Coding & Development

Sep 13, 2026 Bite-Sized AI

Krisztian Eyssen

Reviewing AI-Written Code: What to Look For

Since 2023 the share of generated code that compiles has climbed from 50% to 95%. Over the same period the security rate **stayed between 45% and 55%**. The defects did not disappear, they moved house: permissions and architecture took the place of typos. Review has to follow them.

Intermediate Developer How-To Coding & Development

Sep 13, 2026 Bite-Sized AI

Krisztian Eyssen

The Security Bill of AI-Generated Code

From 11 September 2026, anyone placing software on the market in the European Union **has to report an actively exploited vulnerability within 24 hours**. Meanwhile roughly **45%** of generation tasks produce code with a known vulnerability when there is no explicit security instruction. Those two numbers together are the bill.

Advanced Developer Explainer Coding & Development

Sep 13, 2026 Bite-Sized AI

Krisztian Eyssen

Hallucinated Packages: When AI Invents a Library

**43%** of invented package names come back identically in all ten runs out of ten. That is what turns a hallucination into an attack surface: the attacker does not have to guess what the model will invent — one question is enough. A documented, successful attack, on the other hand, **had not happened** by mid-2026 — and that honest answer is stronger than scaremongering.

Advanced Developer Troubleshooting Coding & Development

Sep 13, 2026 Bite-Sized AI

Krisztian Eyssen

Tests First: Building the Safety Net with AI

Out of a hundred generated tests, **eighteen** stayed usable in an industrial-scale system. And there is a surprising split: **a test you hand the model in the prompt improves the result by 7–30% — a test the agent writes for itself improves it by practically nothing.** The difference between the two is who gets to say what "correct" means.

Intermediate Developer How-To Coding & Development

Sep 13, 2026 Bite-Sized AI

Krisztian Eyssen

Understanding a Legacy Codebase with AI

Model performance **falls off sharply above 32,000 tokens** — while the context window they advertise runs from 128,000 to a million. And there is a measured bias: ask how the repo is put together, and the model would rather **rewrite** it than understand it. This post is about how to ask so that does not happen.

Intermediate Developer Recipe Coding & Development

Sep 13, 2026 Bite-Sized AI

Krisztian Eyssen

Documentation You Will Actually Maintain

Two independent measurements say the same thing, and both contradict received wisdom: **bad documentation is measurably worse than none**, and the machine-generated "repo tour" **lowered the success rate while making runs 20–23% more expensive**. This post is about what survives all that — not much, but it works.

Intermediate Developer Recipe Coding & Development

Sep 13, 2026 Bite-Sized AI

Krisztian Eyssen

Debugging with AI: A Reproducible Method

On a synthetic, self-contained bug, models get the location right 38–53% of the time. In a real repository, **from the code alone, 1–5%.** The text of the bug report on its own is worth six to thirteen points, and the **order** of the input as much as thirty-seven. This post is about how you hand the bug over.

Intermediate Developer Troubleshooting Coding & Development

Sep 13, 2026 Bite-Sized AI

Krisztian Eyssen

Vibe Coding: What It Is Good For and Where It Stops

By the original definition, the point of vibe coding is that you "**forget that the code even exists**". So the question is not how good the model is — it is whether **you can afford to forget that this particular code exists**. In nine documented cases the answer was no.

Beginner Business owner Explainer Coding & Development

Sep 13, 2026 Bite-Sized AI

Krisztian Eyssen

From Prototype to Production: The 70% Wall

There is **no measurement** behind the famous "70%" — the author himself writes that he took it from a tweet. What has been measured: **37%** of companies can show any bottom-line effect at all from AI, and that share has **not moved** in a year — while 80% feel personally more productive. That is the wall.

Intermediate Business owner Explainer Coding & Development

Sep 13, 2026 Bite-Sized AI

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