Harness Engineering? Loop Engineering?

Marcos Cruz — Mon, 10 Aug 2026 10:23:12 +0000

In the world of AI, a new concept appears every week. It's nonstop! The reality is that we're constantly bombarded with new technical words, sometimes a repackaged concept and idea with a new, viral name. Many of these concepts even become outdated or are renamed within few weeks.

How do you avoid getting frustrated along the way? The key is not to blindly follow the hype, but to understand what's behind it.

Two terms that have generated the most confusion lately are Harness Engineering and Loop Engineering.

Here's an explanation of their meanings:

Harness Engineering (The tools): This involves preparing the entire ecosystem that an artificial intelligence agent needs to perform its job.
In other words, it's when you implement skills, tools, and connections (like MCPs) for the AI so it can interact with your system.
Loop Engineering (The automation): This refers to the orchestration and design of workflows (loops). Instead of working in the traditional way by typing a prompt in a chat for the AI to do something on a one-off basis (what's called an "open loop"), you design a cycle where the AI acts automatically in response to certain events.
A practical example: Imagine you configure a loop where, if a system detects an error in your code, an AI agent is automatically triggered, analyzes the error, writes a test, fixes it, and sends you the proposed change ready for review.

Hope it helps to clarify! Cheers!

DEV Community: Marcos Cruz

Harness Engineering? Loop Engineering?