bare bones

[Gregory]

(plural) the most basic facts or elements

[Monty]

The essential elements of something, described without going into detail.

[LindaArrit]

Bare bones generally refers to the most basic, simplest, or essential elements or structure of something, devoid of any additional or extraneous features or details. It could pertain to any subject, such as a project, product, system, or plan, among others. It aims to provide only what is strictly necessary so that one can fully understand the fundamental aspects without any distractions.