Is "Agentic Engineering" is the new name for "Agent Experience"? If so, and even though I love Simon's contributions, there are many other guides to making codebases more welcoming to agents...

Shameless plug: I wrote one. https://marmelab.com/blog/2026/01/21/agent-experience.html

I hadn't heard that term before, is it widely used?

https://agentexperience.ax/ describes it as "refers to the holistic experience AI agents have when interacting with a product, platform, or system" which feels to me like a different concept to figuring out patterns for effectively using coding agents as a software engineer.